Upload app

.gitignore

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+# IntelliJ project files
+.idea
+*.iml
+out
+gen
+
+### Vim template
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+*.un~
+Session.vim
+.netrwhist
+*~
+
+### IPythonNotebook template
+# Temporary data
+.ipynb_checkpoints/
+
+### Python template
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+#lib/
+#lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+*.ipynb
+*.params
+# *.json
+.vscode/
+*.code-workspace/
+
+lib/pycocotools/_mask.c
+lib/nms/cpu_nms.c
+
+OUTPUT
+OUTPUT/*
+models/*
+DATASET
+DATASET/*
+external/
+MODELS
+MODELS/*
+gradio_cached_examples/*
+
+kill.sh
+
+draws/
+#:wq
+#plot/figs
+
+*venv/*
+
+# images
+# images/*
+
+create_samples/
+create_samples/*
+
+ckpts/*

app.py

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+import gradio as gr
+import torch
+import argparse
+from omegaconf import OmegaConf
+from gligen.task_grounded_generation import grounded_generation_box, load_ckpt
+
+import json
+import numpy as np
+from PIL import Image, ImageDraw, ImageFont
+from functools import partial
+import math
+
+from gradio import processing_utils
+from typing import Optional
+
+from huggingface_hub import hf_hub_download
+hf_hub_download = partial(hf_hub_download, library_name="gligen_demo")
+
+
+arg_bool = lambda x: x.lower() == 'true'
+
+
+def parse_option():
+    parser = argparse.ArgumentParser('GLIGen Demo', add_help=False)
+    parser.add_argument("--folder", type=str,  default="create_samples", help="path to OUTPUT")
+    parser.add_argument("--official_ckpt", type=str,  default='ckpts/sd-v1-4.ckpt', help="")
+    parser.add_argument("--guidance_scale", type=float,  default=5, help="")
+    parser.add_argument("--alpha_scale", type=float,  default=1, help="scale tanh(alpha). If 0, the behaviour is same as original model")
+    parser.add_argument("--load-text-box-generation", type=arg_bool, default=True, help="Load text-box generation pipeline.")
+    parser.add_argument("--load-text-box-inpainting", type=arg_bool, default=True, help="Load text-box inpainting pipeline.")
+    parser.add_argument("--load-text-image-box-generation", type=arg_bool, default=True, help="Load text-image-box generation pipeline.")
+    args = parser.parse_args()
+    return args
+args = parse_option()
+
+
+def load_from_hf(repo_id, filename='diffusion_pytorch_model.bin'):
+    cache_file = hf_hub_download(repo_id=repo_id, filename=filename)
+    return torch.load(cache_file, map_location='cpu')
+
+def load_ckpt_config_from_hf(modality):
+    ckpt = load_from_hf(f'gligen/{modality}')
+    config = load_from_hf('gligen/demo_config_legacy', filename=f'{modality}.pth')
+    return ckpt, config
+
+
+if args.load_text_box_generation:
+    pretrained_ckpt_gligen, config = load_ckpt_config_from_hf('gligen-generation-text-box')
+    config = OmegaConf.create( config["_content"] ) # config used in training
+    config.update( vars(args) )
+    config.model['params']['is_inpaint'] = False
+    config.model['params']['is_style'] = False
+    loaded_model_list = load_ckpt(config, pretrained_ckpt_gligen) 
+
+
+if args.load_text_box_inpainting:
+    pretrained_ckpt_gligen_inpaint, config = load_ckpt_config_from_hf('gligen-inpainting-text-box')
+    config = OmegaConf.create( config["_content"] ) # config used in training
+    config.update( vars(args) )
+    config.model['params']['is_inpaint'] = True 
+    config.model['params']['is_style'] = False
+    loaded_model_list_inpaint = load_ckpt(config, pretrained_ckpt_gligen_inpaint)
+
+
+if args.load_text_image_box_generation:
+    pretrained_ckpt_gligen_style, config = load_ckpt_config_from_hf('gligen-generation-text-image-box')
+    config = OmegaConf.create( config["_content"] ) # config used in training
+    config.update( vars(args) )
+    config.model['params']['is_inpaint'] = False 
+    config.model['params']['is_style'] = True
+    loaded_model_list_style = load_ckpt(config, pretrained_ckpt_gligen_style)
+
+
+def load_clip_model():
+    from transformers import CLIPProcessor, CLIPModel
+    version = "openai/clip-vit-large-patch14"
+    model = CLIPModel.from_pretrained(version).cuda()
+    processor = CLIPProcessor.from_pretrained(version)
+
+    return {
+        'version': version,
+        'model': model,
+        'processor': processor,
+    }
+
+clip_model = load_clip_model()
+
+
+class ImageMask(gr.components.Image):
+    """
+    Sets: source="canvas", tool="sketch"
+    """
+
+    is_template = True
+
+    def __init__(self, **kwargs):
+        super().__init__(source="upload", tool="sketch", interactive=True, **kwargs)
+
+    def preprocess(self, x):
+        if x is None:
+            return x
+        if self.tool == "sketch" and self.source in ["upload", "webcam"] and type(x) != dict:
+            decode_image = processing_utils.decode_base64_to_image(x)
+            width, height = decode_image.size
+            mask = np.zeros((height, width, 4), dtype=np.uint8)
+            mask[..., -1] = 255
+            mask = self.postprocess(mask)
+            x = {'image': x, 'mask': mask}
+        return super().preprocess(x)
+
+
+class Blocks(gr.Blocks):
+
+    def __init__(
+        self,
+        theme: str = "default",
+        analytics_enabled: Optional[bool] = None,
+        mode: str = "blocks",
+        title: str = "Gradio",
+        css: Optional[str] = None,
+        **kwargs,
+    ):
+
+        self.extra_configs = {
+            'thumbnail': kwargs.pop('thumbnail', ''),
+            'url': kwargs.pop('url', 'https://gradio.app/'),
+            'creator': kwargs.pop('creator', '@teamGradio'),
+        }
+
+        super(Blocks, self).__init__(theme, analytics_enabled, mode, title, css, **kwargs)
+
+    def get_config_file(self):
+        config = super(Blocks, self).get_config_file()
+
+        for k, v in self.extra_configs.items():
+            config[k] = v
+        
+        return config
+
+'''
+inference model
+'''
+
+@torch.no_grad()
+def inference(task, language_instruction, grounding_instruction, inpainting_boxes_nodrop, image,
+              alpha_sample, guidance_scale, batch_size,
+              fix_seed, rand_seed, actual_mask, style_image,
+              *args, **kwargs):
+    grounding_instruction = json.loads(grounding_instruction)
+    phrase_list, location_list = [], []
+    for k, v  in grounding_instruction.items():
+        phrase_list.append(k)
+        location_list.append(v)
+
+    placeholder_image = Image.open('images/teddy.jpg').convert("RGB")    
+    image_list = [placeholder_image] * len(phrase_list) # placeholder input for visual prompt, which is disabled
+
+    batch_size = int(batch_size)
+    if not 1 <= batch_size <= 2:
+        batch_size = 2
+
+    if style_image == None:
+        has_text_mask = 1 
+        has_image_mask = 0 # then we hack above 'image_list' 
+    else:
+        valid_phrase_len = len(phrase_list)
+
+        phrase_list += ['placeholder']
+        has_text_mask = [1]*valid_phrase_len + [0]
+
+        image_list = [placeholder_image]*valid_phrase_len + [style_image]
+        has_image_mask = [0]*valid_phrase_len + [1]
+        
+        location_list += [ [0.0, 0.0, 1, 0.01]  ] # style image grounding location
+
+    if task == 'Grounded Inpainting':
+        alpha_sample = 1.0
+
+    instruction = dict(
+        prompt = language_instruction,
+        phrases = phrase_list,
+        images = image_list,
+        locations = location_list,
+        alpha_type = [alpha_sample, 0, 1.0 - alpha_sample], 
+        has_text_mask = has_text_mask,
+        has_image_mask = has_image_mask,
+        save_folder_name = language_instruction,
+        guidance_scale = guidance_scale,
+        batch_size = batch_size,
+        fix_seed = bool(fix_seed),
+        rand_seed = int(rand_seed),
+        actual_mask = actual_mask,
+        inpainting_boxes_nodrop = inpainting_boxes_nodrop,
+    )
+
+    with torch.autocast(device_type='cuda', dtype=torch.float16):
+        if task == 'Grounded Generation':
+            if style_image == None:
+                return grounded_generation_box(loaded_model_list, instruction, *args, **kwargs)
+            else:
+                return grounded_generation_box(loaded_model_list_style, instruction, *args, **kwargs)
+        elif task == 'Grounded Inpainting':
+            assert image is not None
+            instruction['input_image'] = image.convert("RGB")
+            return grounded_generation_box(loaded_model_list_inpaint, instruction, *args, **kwargs)
+
+
+def draw_box(boxes=[], texts=[], img=None):
+    if len(boxes) == 0 and img is None:
+        return None
+
+    if img is None:
+        img = Image.new('RGB', (512, 512), (255, 255, 255))
+    colors = ["red", "olive", "blue", "green", "orange", "brown", "cyan", "purple"]
+    draw = ImageDraw.Draw(img)
+    font = ImageFont.truetype("DejaVuSansMono.ttf", size=18)
+    for bid, box in enumerate(boxes):
+        draw.rectangle([box[0], box[1], box[2], box[3]], outline=colors[bid % len(colors)], width=4)
+        anno_text = texts[bid]
+        draw.rectangle([box[0], box[3] - int(font.size * 1.2), box[0] + int((len(anno_text) + 0.8) * font.size * 0.6), box[3]], outline=colors[bid % len(colors)], fill=colors[bid % len(colors)], width=4)
+        draw.text([box[0] + int(font.size * 0.2), box[3] - int(font.size*1.2)], anno_text, font=font, fill=(255,255,255))
+    return img
+
+def get_concat(ims):
+    if len(ims) == 1:
+        n_col = 1
+    else:
+        n_col = 2
+    n_row = math.ceil(len(ims) / 2)
+    dst = Image.new('RGB', (ims[0].width * n_col, ims[0].height * n_row), color="white")
+    for i, im in enumerate(ims):
+        row_id = i // n_col
+        col_id = i % n_col
+        dst.paste(im, (im.width * col_id, im.height * row_id))
+    return dst
+
+
+def auto_append_grounding(language_instruction, grounding_texts):
+    for grounding_text in grounding_texts:
+        if grounding_text not in language_instruction and grounding_text != 'auto':
+            language_instruction += "; " + grounding_text
+    print(language_instruction)
+    return language_instruction
+
+
+
+
+def generate(task, language_instruction, grounding_texts, sketch_pad,
+             alpha_sample, guidance_scale, batch_size,
+             fix_seed, rand_seed, use_actual_mask, append_grounding, style_cond_image,
+             state):
+    if 'boxes' not in state:
+        state['boxes'] = []
+
+    boxes = state['boxes']
+    grounding_texts = [x.strip() for x in grounding_texts.split(';')]
+    assert len(boxes) == len(grounding_texts)
+    boxes = (np.asarray(boxes) / 512).tolist()
+    grounding_instruction = json.dumps({obj: box for obj,box in zip(grounding_texts, boxes)})
+
+    image = None
+    actual_mask = None
+    if task == 'Grounded Inpainting':
+        image = state.get('original_image', sketch_pad['image']).copy()
+        image = center_crop(image)
+        image = Image.fromarray(image)
+
+        if use_actual_mask:
+            actual_mask = sketch_pad['mask'].copy()
+            if actual_mask.ndim == 3:
+                actual_mask = actual_mask[..., 0]
+            actual_mask = center_crop(actual_mask, tgt_size=(64, 64))
+            actual_mask = torch.from_numpy(actual_mask == 0).float()
+
+        if state.get('inpaint_hw', None):
+            boxes = np.asarray(boxes) * 0.9 + 0.05
+            boxes = boxes.tolist()
+            grounding_instruction = json.dumps({obj: box for obj,box in zip(grounding_texts, boxes) if obj != 'auto'})
+    
+    if append_grounding:
+        language_instruction = auto_append_grounding(language_instruction, grounding_texts)
+
+    gen_images, gen_overlays = inference(
+        task, language_instruction, grounding_instruction, boxes, image,
+        alpha_sample, guidance_scale, batch_size,
+        fix_seed, rand_seed, actual_mask, style_cond_image, clip_model=clip_model,
+    )
+
+    for idx, gen_image in enumerate(gen_images):
+
+        if task == 'Grounded Inpainting' and state.get('inpaint_hw', None):
+            hw = min(*state['original_image'].shape[:2])
+            gen_image = sized_center_fill(state['original_image'].copy(), np.array(gen_image.resize((hw, hw))), hw, hw)
+            gen_image = Image.fromarray(gen_image)
+        
+        gen_images[idx] = gen_image
+
+    blank_samples = batch_size % 2 if batch_size > 1 else 0
+    gen_images = [gr.Image.update(value=x, visible=True) for i,x in enumerate(gen_images)] \
+                    + [gr.Image.update(value=None, visible=True) for _ in range(blank_samples)] \
+                    + [gr.Image.update(value=None, visible=False) for _ in range(4 - batch_size - blank_samples)]
+
+    return gen_images + [state]
+
+
+def binarize(x):
+    return (x != 0).astype('uint8') * 255
+
+def sized_center_crop(img, cropx, cropy):
+    y, x = img.shape[:2]
+    startx = x // 2 - (cropx // 2)
+    starty = y // 2 - (cropy // 2)    
+    return img[starty:starty+cropy, startx:startx+cropx]
+
+def sized_center_fill(img, fill, cropx, cropy):
+    y, x = img.shape[:2]
+    startx = x // 2 - (cropx // 2)
+    starty = y // 2 - (cropy // 2)    
+    img[starty:starty+cropy, startx:startx+cropx] = fill
+    return img
+
+def sized_center_mask(img, cropx, cropy):
+    y, x = img.shape[:2]
+    startx = x // 2 - (cropx // 2)
+    starty = y // 2 - (cropy // 2)    
+    center_region = img[starty:starty+cropy, startx:startx+cropx].copy()
+    img = (img * 0.2).astype('uint8')
+    img[starty:starty+cropy, startx:startx+cropx] = center_region
+    return img
+
+def center_crop(img, HW=None, tgt_size=(512, 512)):
+    if HW is None:
+        H, W = img.shape[:2]
+        HW = min(H, W)
+    img = sized_center_crop(img, HW, HW)
+    img = Image.fromarray(img)
+    img = img.resize(tgt_size)
+    return np.array(img)
+
+def draw(task, input, grounding_texts, new_image_trigger, state):
+    if type(input) == dict:
+        image = input['image']
+        mask = input['mask']
+    else:
+        mask = input
+
+    if mask.ndim == 3:
+        mask = mask[..., 0]
+
+    image_scale = 1.0
+
+    # resize trigger
+    if task == "Grounded Inpainting":
+        mask_cond = mask.sum() == 0
+        # size_cond = mask.shape != (512, 512)
+        if mask_cond and 'original_image' not in state:
+            image = Image.fromarray(image)
+            width, height = image.size
+            scale = 600 / min(width, height)
+            image = image.resize((int(width * scale), int(height * scale)))
+            state['original_image'] = np.array(image).copy()
+            image_scale = float(height / width)
+            return [None, new_image_trigger + 1, image_scale, state]
+        else:
+            original_image = state['original_image']
+            H, W = original_image.shape[:2]
+            image_scale = float(H / W)
+
+    mask = binarize(mask)
+    if mask.shape != (512, 512):
+        # assert False, "should not receive any non- 512x512 masks."
+        if 'original_image' in state and state['original_image'].shape[:2] == mask.shape:
+            mask = center_crop(mask, state['inpaint_hw'])
+            image = center_crop(state['original_image'], state['inpaint_hw'])
+        else:
+            mask = np.zeros((512, 512), dtype=np.uint8)
+    # mask = center_crop(mask)
+    mask = binarize(mask)
+
+    if type(mask) != np.ndarray:
+        mask = np.array(mask)
+
+    if mask.sum() == 0 and task != "Grounded Inpainting":
+        state = {}
+
+    if task != 'Grounded Inpainting':
+        image = None
+    else:
+        image = Image.fromarray(image)
+
+    if 'boxes' not in state:
+        state['boxes'] = []
+
+    if 'masks' not in state or len(state['masks']) == 0:
+        state['masks'] = []
+        last_mask = np.zeros_like(mask)
+    else:
+        last_mask = state['masks'][-1]
+
+    if type(mask) == np.ndarray and mask.size > 1:
+        diff_mask = mask - last_mask
+    else:
+        diff_mask = np.zeros([])
+
+    if diff_mask.sum() > 0:
+        x1x2 = np.where(diff_mask.max(0) != 0)[0]
+        y1y2 = np.where(diff_mask.max(1) != 0)[0]
+        y1, y2 = y1y2.min(), y1y2.max()
+        x1, x2 = x1x2.min(), x1x2.max()
+
+        if (x2 - x1 > 5) and (y2 - y1 > 5):
+            state['masks'].append(mask.copy())
+            state['boxes'].append((x1, y1, x2, y2))
+
+    grounding_texts = [x.strip() for x in grounding_texts.split(';')]
+    grounding_texts = [x for x in grounding_texts if len(x) > 0]
+    if len(grounding_texts) < len(state['boxes']):
+        grounding_texts += [f'Obj. {bid+1}' for bid in range(len(grounding_texts), len(state['boxes']))]
+
+    box_image = draw_box(state['boxes'], grounding_texts, image)
+
+    if box_image is not None and state.get('inpaint_hw', None):
+        inpaint_hw = state['inpaint_hw']
+        box_image_resize = np.array(box_image.resize((inpaint_hw, inpaint_hw)))
+        original_image = state['original_image'].copy()
+        box_image = sized_center_fill(original_image, box_image_resize, inpaint_hw, inpaint_hw)
+
+    return [box_image, new_image_trigger, image_scale, state]
+
+def clear(task, sketch_pad_trigger, batch_size, state, switch_task=False):
+    if task != 'Grounded Inpainting':
+        sketch_pad_trigger = sketch_pad_trigger + 1
+    blank_samples = batch_size % 2 if batch_size > 1 else 0
+    out_images = [gr.Image.update(value=None, visible=True) for i in range(batch_size)] \
+                    + [gr.Image.update(value=None, visible=True) for _ in range(blank_samples)] \
+                    + [gr.Image.update(value=None, visible=False) for _ in range(4 - batch_size - blank_samples)]
+    state = {}
+    return [None, sketch_pad_trigger, None, 1.0] + out_images + [state]
+
+css = """
+#generate-btn {
+    --tw-border-opacity: 1;
+    border-color: rgb(255 216 180 / var(--tw-border-opacity));
+    --tw-gradient-from: rgb(255 216 180 / .7);
+    --tw-gradient-to: rgb(255 216 180 / 0);
+    --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to);
+    --tw-gradient-to: rgb(255 176 102 / .8);
+    --tw-text-opacity: 1;
+    color: rgb(238 116 0 / var(--tw-text-opacity));
+}
+#img2img_image, #img2img_image > .h-60, #img2img_image > .h-60 > div, #img2img_image > .h-60 > div > img
+{
+    height: var(--height) !important;
+    max-height: var(--height) !important;
+    min-height: var(--height) !important;
+}
+#mirrors a:hover {
+    cursor:pointer;
+}
+#paper-info a {
+    color:#008AD7;
+}
+#paper-info a:hover {
+    cursor: pointer;
+}
+"""
+
+rescale_js = """
+function(x) {
+    const root = document.querySelector('gradio-app').shadowRoot || document.querySelector('gradio-app');
+    let image_scale = parseFloat(root.querySelector('#image_scale input').value) || 1.0;
+    const image_width = root.querySelector('#img2img_image').clientWidth;
+    const target_height = parseInt(image_width * image_scale);
+    document.body.style.setProperty('--height', `${target_height}px`);
+    root.querySelectorAll('button.justify-center.rounded')[0].style.display='none';
+    root.querySelectorAll('button.justify-center.rounded')[1].style.display='none';
+    return x;
+}
+"""
+
+mirror_js = """
+function () {
+    const root = document.querySelector('gradio-app').shadowRoot || document.querySelector('gradio-app');
+    const mirrors_div = root.querySelector('#mirrors');
+    const current_url = window.location.href;
+    const mirrors = [
+        'https://dev.hliu.cc/gligen_mirror1/',
+        'https://dev.hliu.cc/gligen_mirror2/',
+    ];
+
+    let mirror_html = '';
+    mirror_html += '[<a href="https://gligen.github.io" target="_blank" style="">Project Page</a>]';
+    mirror_html += '[<a href="https://arxiv.org/abs/2301.07093" target="_blank" style="">Paper</a>]';
+    mirror_html += '[<a href="https://github.com/gligen/GLIGEN" target="_blank" style="">GitHub Repo</a>]';
+    mirror_html += '&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;';
+    mirror_html += 'Mirrors: ';
+
+    mirrors.forEach((e, index) => {
+        let cur_index = index + 1;
+        if (current_url.includes(e)) {
+            mirror_html += `[Mirror ${cur_index}] `;
+        } else {
+            mirror_html += `[<a onclick="window.location.href = '${e}'">Mirror ${cur_index}</a>] `;
+        }
+    });
+
+    mirror_html = `<div class="output-markdown gr-prose" style="max-width: 100%;"><h3 style="text-align: center" id="paper-info">${mirror_html}</h3></div>`;
+
+    mirrors_div.innerHTML = mirror_html;
+}
+"""
+
+with Blocks(
+    css=css,
+    analytics_enabled=False,
+    title="GLIGen demo",
+) as main:
+    gr.Markdown('<h1 style="text-align: center;">GLIGen: Open-Set Grounded Text-to-Image Generation</h1>')
+    gr.Markdown("""<h3 style="text-align: center" id="paper-info">
+    [<a href="https://gligen.github.io" target="_blank" style="">Project Page</a>]
+    [<a href="https://arxiv.org/abs/2301.07093" target="_blank" style="">Paper</a>]
+    [<a href="https://github.com/gligen/GLIGEN" target="_blank" style="">GitHub Repo</a>]
+    </h3>""")
+    # gr.HTML("", elem_id="mirrors")
+    gr.Markdown("To ground concepts of interest with desired spatial specification, please (1) &#9000;&#65039; enter the concept names in <em> Grounding Instruction</em>, and (2) &#128433;&#65039; draw their corresponding bounding boxes one by one using <em> Sketch Pad</em> -- the parsed boxes will be displayed automatically.")
+    with gr.Row():
+        with gr.Column(scale=4):
+            sketch_pad_trigger = gr.Number(value=0, visible=False)
+            sketch_pad_resize_trigger = gr.Number(value=0, visible=False)
+            init_white_trigger = gr.Number(value=0, visible=False)
+            image_scale = gr.Number(value=0, elem_id="image_scale", visible=False)
+            new_image_trigger = gr.Number(value=0, visible=False)
+
+            task = gr.Radio(
+                choices=["Grounded Generation", 'Grounded Inpainting'],
+                type="value",
+                value="Grounded Generation",
+                label="Task",
+            )
+            language_instruction = gr.Textbox(
+                label="Language instruction",
+            )
+            grounding_instruction = gr.Textbox(
+                label="Grounding instruction (Separated by semicolon)",
+            )
+            with gr.Row():
+                sketch_pad = ImageMask(label="Sketch Pad", elem_id="img2img_image")
+                out_imagebox = gr.Image(type="pil", label="Parsed Sketch Pad")
+            with gr.Row():
+                clear_btn = gr.Button(value='Clear')
+                gen_btn = gr.Button(value='Generate', elem_id="generate-btn")
+            with gr.Accordion("Advanced Options", open=False):
+                with gr.Column():
+                    alpha_sample = gr.Slider(minimum=0, maximum=1.0, step=0.1, value=0.3, label="Scheduled Sampling (τ)")
+                    guidance_scale = gr.Slider(minimum=0, maximum=50, step=0.5, value=7.5, label="Guidance Scale")
+                    batch_size = gr.Slider(minimum=1, maximum=2, step=1, value=2, label="Number of Samples")
+                    append_grounding = gr.Checkbox(value=True, label="Append grounding instructions to the caption")
+                    use_actual_mask = gr.Checkbox(value=False, label="Use actual mask for inpainting", visible=False)
+                    with gr.Row():
+                        fix_seed = gr.Checkbox(value=True, label="Fixed seed")
+                        rand_seed = gr.Slider(minimum=0, maximum=1000, step=1, value=0, label="Seed")
+                    with gr.Row():
+                        use_style_cond = gr.Checkbox(value=False, label="Enable Style Condition")
+                        style_cond_image = gr.Image(type="pil", label="Style Condition", visible=False, interactive=True)
+        with gr.Column(scale=4):
+            gr.Markdown("### Generated Images")
+            with gr.Row():
+                out_gen_1 = gr.Image(type="pil", visible=True, show_label=False)
+                out_gen_2 = gr.Image(type="pil", visible=True, show_label=False)
+            with gr.Row():
+                out_gen_3 = gr.Image(type="pil", visible=False, show_label=False)
+                out_gen_4 = gr.Image(type="pil", visible=False, show_label=False)
+
+        state = gr.State({})
+
+        class Controller:
+            def __init__(self):
+                self.calls = 0
+                self.tracks = 0
+                self.resizes = 0
+                self.scales = 0
+
+            def init_white(self, init_white_trigger):
+                self.calls += 1
+                return np.ones((512, 512), dtype='uint8') * 255, 1.0, init_white_trigger+1
+
+            def change_n_samples(self, n_samples):
+                blank_samples = n_samples % 2 if n_samples > 1 else 0
+                return [gr.Image.update(visible=True) for _ in range(n_samples + blank_samples)] \
+                    + [gr.Image.update(visible=False) for _ in range(4 - n_samples - blank_samples)]
+
+            def resize_centercrop(self, state):
+                self.resizes += 1
+                image = state['original_image'].copy()
+                inpaint_hw = int(0.9 * min(*image.shape[:2]))
+                state['inpaint_hw'] = inpaint_hw
+                image_cc = center_crop(image, inpaint_hw)
+                # print(f'resize triggered {self.resizes}', image.shape, '->', image_cc.shape)
+                return image_cc, state
+
+            def resize_masked(self, state):
+                self.resizes += 1
+                image = state['original_image'].copy()
+                inpaint_hw = int(0.9 * min(*image.shape[:2]))
+                state['inpaint_hw'] = inpaint_hw
+                image_mask = sized_center_mask(image, inpaint_hw, inpaint_hw)
+                state['masked_image'] = image_mask.copy()
+                # print(f'mask triggered {self.resizes}')
+                return image_mask, state
+            
+            def switch_task_hide_cond(self, task):
+                cond = False
+                if task == "Grounded Generation":
+                    cond = True
+
+                return gr.Checkbox.update(visible=cond, value=False), gr.Image.update(value=None, visible=False), gr.Slider.update(visible=cond), gr.Checkbox.update(visible=(not cond), value=False)
+
+        controller = Controller()
+        main.load(
+            lambda x:x+1,
+            inputs=sketch_pad_trigger,
+            outputs=sketch_pad_trigger,
+            queue=False)
+        sketch_pad.edit(
+            draw,
+            inputs=[task, sketch_pad, grounding_instruction, sketch_pad_resize_trigger, state],
+            outputs=[out_imagebox, sketch_pad_resize_trigger, image_scale, state],
+            queue=False,
+        )
+        grounding_instruction.change(
+            draw,
+            inputs=[task, sketch_pad, grounding_instruction, sketch_pad_resize_trigger, state],
+            outputs=[out_imagebox, sketch_pad_resize_trigger, image_scale, state],
+            queue=False,
+        )
+        clear_btn.click(
+            clear,
+            inputs=[task, sketch_pad_trigger, batch_size, state],
+            outputs=[sketch_pad, sketch_pad_trigger, out_imagebox, image_scale, out_gen_1, out_gen_2, out_gen_3, out_gen_4, state],
+            queue=False)
+        task.change(
+            partial(clear, switch_task=True),
+            inputs=[task, sketch_pad_trigger, batch_size, state],
+            outputs=[sketch_pad, sketch_pad_trigger, out_imagebox, image_scale, out_gen_1, out_gen_2, out_gen_3, out_gen_4, state],
+            queue=False)
+        sketch_pad_trigger.change(
+            controller.init_white,
+            inputs=[init_white_trigger],
+            outputs=[sketch_pad, image_scale, init_white_trigger],
+            queue=False)
+        sketch_pad_resize_trigger.change(
+            controller.resize_masked,
+            inputs=[state],
+            outputs=[sketch_pad, state],
+            queue=False)
+        batch_size.change(
+            controller.change_n_samples,
+            inputs=[batch_size],
+            outputs=[out_gen_1, out_gen_2, out_gen_3, out_gen_4],
+            queue=False)
+        gen_btn.click(
+            generate,
+            inputs=[
+                task, language_instruction, grounding_instruction, sketch_pad,
+                alpha_sample, guidance_scale, batch_size,
+                fix_seed, rand_seed,
+                use_actual_mask,
+                append_grounding, style_cond_image,
+                state,
+            ],
+            outputs=[out_gen_1, out_gen_2, out_gen_3, out_gen_4, state],
+            queue=True
+        )
+        sketch_pad_resize_trigger.change(
+            None,
+            None,
+            sketch_pad_resize_trigger,
+            _js=rescale_js,
+            queue=False)
+        init_white_trigger.change(
+            None,
+            None,
+            init_white_trigger,
+            _js=rescale_js,
+            queue=False)
+        use_style_cond.change(
+            lambda cond: gr.Image.update(visible=cond),
+            use_style_cond,
+            style_cond_image,
+            queue=False)
+        task.change(
+            controller.switch_task_hide_cond,
+            inputs=task,
+            outputs=[use_style_cond, style_cond_image, alpha_sample, use_actual_mask],
+            queue=False)
+
+    with gr.Column():
+        gr.Examples(
+            examples=[
+                [
+                    "images/blank.png",
+                    "Grounded Generation",
+                    "a dog and an apple",
+                    "a dog;an apple",
+                ],
+                [
+                    "images/blank.png",
+                    "Grounded Generation",
+                    "John Lennon is using a pc",
+                    "John Lennon;a pc",
+                [
+                    "images/blank.png",
+                    "Grounded Generation",
+                    "a painting of a fox sitting in a field at sunrise in the style of Claude Mone",
+                    "fox;sunrise",
+                ],
+                ],
+                [
+                    "images/blank.png",
+                    "Grounded Generation",
+                    "a beautiful painting of hot dog by studio ghibli, octane render, brilliantly coloured",
+                    "hot dog",
+                ],
+                [
+                    "images/blank.png",
+                    "Grounded Generation",
+                    "a sport car, unreal engine, global illumination, ray tracing",
+                    "a sport car",
+                ],
+                [
+                    "images/flower_beach.jpg",
+                    "Grounded Inpainting",
+                    "a squirrel and the space needle",
+                    "a squirrel;the space needle",
+                ],
+                [
+                    "images/arg_corgis.jpeg",
+                    "Grounded Inpainting",
+                    "a dog and a birthday cake",
+                    "a dog; a birthday cake",
+                ],
+                [
+                    "images/teddy.jpg",
+                    "Grounded Inpainting",
+                    "a teddy bear wearing a santa claus red shirt; holding a Christmas gift box on hand",
+                    "a santa claus shirt; a Christmas gift box",
+                ],
+            ],
+            inputs=[sketch_pad, task, language_instruction, grounding_instruction],
+            outputs=None,
+            fn=None,
+            cache_examples=False,
+        )
+
+main.queue(concurrency_count=1, api_open=False)
+main.launch(share=False, show_api=False)
+
+

dataset/base_dataset.py

@@ -0,0 +1,220 @@
+import torch 
+from PIL import Image, ImageDraw
+import torchvision.transforms as transforms
+import torchvision
+from zipfile import ZipFile 
+import os
+import multiprocessing
+import math
+import numpy as np
+import random 
+from io import BytesIO
+
+VALID_IMAGE_TYPES = ['.jpg', '.jpeg', '.tiff', '.bmp', '.png']
+
+
+def check_filenames_in_zipdata(filenames, ziproot):
+    samples = []
+    for fst in ZipFile(ziproot).infolist():
+        fname = fst.filename
+        if fname.endswith('/') or fname.startswith('.') or fst.file_size == 0:
+            continue
+        if os.path.splitext(fname)[1].lower() in VALID_IMAGE_TYPES:
+            samples.append((fname))
+    filenames = set(filenames)
+    samples = set(samples)
+    assert filenames.issubset(samples), 'Something wrong with your zip data'
+
+
+
+def draw_box(img, boxes):
+    colors = ["red", "olive", "blue", "green", "orange", "brown", "cyan", "purple"]
+    draw = ImageDraw.Draw(img)
+    for bid, box in enumerate(boxes):
+        draw.rectangle([box[0], box[1], box[2], box[3]], outline =colors[bid % len(colors)], width=4)
+        # draw.rectangle([box[0], box[1], box[2], box[3]], outline ="red", width=2) # x0 y0 x1 y1 
+    return img 
+
+
+
+def to_valid(x0, y0, x1, y1, image_size, min_box_size):
+    valid = True
+
+    if x0>image_size or y0>image_size or x1<0 or y1<0:
+        valid = False # no way to make this box vide, it is completely cropped out 
+        return valid, (None, None, None, None)
+
+    x0 = max(x0, 0)
+    y0 = max(y0, 0)
+    x1 = min(x1, image_size)
+    y1 = min(y1, image_size)
+
+    if (x1-x0)*(y1-y0) / (image_size*image_size) < min_box_size:
+        valid = False
+        return valid, (None, None, None, None)
+     
+    return valid, (x0, y0, x1, y1)
+
+
+
+
+
+def recalculate_box_and_verify_if_valid(x, y, w, h, trans_info, image_size, min_box_size):
+    """
+    x,y,w,h:  the original annotation corresponding to the raw image size.
+    trans_info: what resizing and cropping have been applied to the raw image 
+    image_size:  what is the final image size  
+    """
+
+    x0 = x * trans_info["performed_scale"] - trans_info['crop_x'] 
+    y0 = y * trans_info["performed_scale"] - trans_info['crop_y'] 
+    x1 = (x + w) * trans_info["performed_scale"] - trans_info['crop_x'] 
+    y1 = (y + h) * trans_info["performed_scale"] - trans_info['crop_y'] 
+
+
+    # at this point, box annotation has been recalculated based on scaling and cropping
+    # but some point may fall off the image_size region (e.g., negative value), thus we 
+    # need to clamp them into 0-image_size. But if all points falling outsize of image 
+    # region, then we will consider this is an invalid box. 
+    valid, (x0, y0, x1, y1) = to_valid(x0, y0, x1, y1, image_size, min_box_size)
+
+    if valid:
+        # we also perform random flip. 
+        # Here boxes are valid, and are based on image_size 
+        if trans_info["performed_flip"]:
+            x0, x1 = image_size-x1, image_size-x0
+
+    return valid, (x0, y0, x1, y1)
+
+
+
+class BaseDataset(torch.utils.data.Dataset):
+    def __init__(self, image_root, random_crop, random_flip, image_size):
+        super().__init__() 
+        self.image_root = image_root
+        self.random_crop = random_crop
+        self.random_flip = random_flip
+        self.image_size = image_size
+        self.use_zip = False
+
+        if image_root[-4::] == 'zip':
+            self.use_zip = True
+            self.zip_dict = {}
+
+        if self.random_crop:
+            assert False, 'NOT IMPLEMENTED'
+
+
+    def fetch_zipfile(self, ziproot):
+        pid = multiprocessing.current_process().pid # get pid of this process.
+        if pid not in self.zip_dict:
+            self.zip_dict[pid] = ZipFile(ziproot)
+        zip_file = self.zip_dict[pid]
+        return zip_file
+
+    def fetch_image(self, filename):
+        if self.use_zip:
+            zip_file = self.fetch_zipfile(self.image_root)
+            image = Image.open( BytesIO(zip_file.read(filename)) ).convert('RGB')
+            return image
+        else:
+            image = Image.open( os.path.join(self.image_root,filename) ).convert('RGB')
+        return image
+
+
+    def vis_getitem_data(self, index=None, out=None, return_tensor=False, name="res.jpg", print_caption=True):
+    
+        if out is None:
+            out = self[index]
+
+        img = torchvision.transforms.functional.to_pil_image( out["image"]*0.5+0.5 )
+        canvas = torchvision.transforms.functional.to_pil_image( torch.ones_like(out["image"]) )
+        W, H = img.size
+
+        if print_caption:
+            caption = out["caption"]
+            print(caption)
+            print(" ")
+
+        boxes = []
+        for box in out["boxes"]:    
+            x0,y0,x1,y1 = box
+            boxes.append( [float(x0*W), float(y0*H), float(x1*W), float(y1*H)] )
+        img = draw_box(img, boxes)
+        
+        if return_tensor:
+            return  torchvision.transforms.functional.to_tensor(img)
+        else:
+            img.save(name)   
+
+
+    def transform_image(self, pil_image):
+        if self.random_crop:
+            assert False
+            arr = random_crop_arr(pil_image, self.image_size) 
+        else:
+            arr, info = center_crop_arr(pil_image, self.image_size)
+		
+        info["performed_flip"] = False
+        if self.random_flip and random.random()<0.5:
+            arr = arr[:, ::-1]
+            info["performed_flip"] = True
+		
+        arr = arr.astype(np.float32) / 127.5 - 1
+        arr = np.transpose(arr, [2,0,1])
+
+        return torch.tensor(arr), info 
+
+
+
+def center_crop_arr(pil_image, image_size):
+    # We are not on a new enough PIL to support the `reducing_gap`
+    # argument, which uses BOX downsampling at powers of two first.
+    # Thus, we do it by hand to improve downsample quality.
+    WW, HH = pil_image.size
+
+    while min(*pil_image.size) >= 2 * image_size:
+        pil_image = pil_image.resize(
+            tuple(x // 2 for x in pil_image.size), resample=Image.BOX
+        )
+
+    scale = image_size / min(*pil_image.size)
+
+    pil_image = pil_image.resize(
+        tuple(round(x * scale) for x in pil_image.size), resample=Image.BICUBIC
+    )
+
+    # at this point, the min of pil_image side is desired image_size
+    performed_scale = image_size / min(WW, HH)
+
+    arr = np.array(pil_image)
+    crop_y = (arr.shape[0] - image_size) // 2
+    crop_x = (arr.shape[1] - image_size) // 2
+    
+    info = {"performed_scale":performed_scale, 'crop_y':crop_y, 'crop_x':crop_x, "WW":WW, 'HH':HH}
+
+    return arr[crop_y : crop_y + image_size, crop_x : crop_x + image_size], info
+
+
+def random_crop_arr(pil_image, image_size, min_crop_frac=0.8, max_crop_frac=1.0):
+    min_smaller_dim_size = math.ceil(image_size / max_crop_frac)
+    max_smaller_dim_size = math.ceil(image_size / min_crop_frac)
+    smaller_dim_size = random.randrange(min_smaller_dim_size, max_smaller_dim_size + 1)
+
+    # We are not on a new enough PIL to support the `reducing_gap`
+    # argument, which uses BOX downsampling at powers of two first.
+    # Thus, we do it by hand to improve downsample quality.
+    while min(*pil_image.size) >= 2 * smaller_dim_size:
+        pil_image = pil_image.resize(
+            tuple(x // 2 for x in pil_image.size), resample=Image.BOX
+        )
+
+    scale = smaller_dim_size / min(*pil_image.size)
+    pil_image = pil_image.resize(
+        tuple(round(x * scale) for x in pil_image.size), resample=Image.BICUBIC
+    )
+
+    arr = np.array(pil_image)
+    crop_y = random.randrange(arr.shape[0] - image_size + 1)
+    crop_x = random.randrange(arr.shape[1] - image_size + 1)
+    return arr[crop_y : crop_y + image_size, crop_x : crop_x + image_size]

dataset/catalog.py

@@ -0,0 +1,72 @@
+import os 
+
+class DatasetCatalog:
+    def __init__(self, ROOT, which_embedder):
+        assert which_embedder in ['clip', 'bert']
+
+        # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # 
+
+
+        self.VGGrounding = {   
+            "target": "dataset.tsv_dataset.TSVDataset",
+            "train_params": dict(
+                tsv_path=os.path.join(ROOT,'GROUNDING/gqa/tsv/train-00.tsv'),
+            )
+        }
+
+
+        # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # 
+
+
+        self.FlickrGrounding = {
+            "target": "dataset.tsv_dataset.TSVDataset",
+            "train_params":dict(
+                tsv_path=os.path.join(ROOT,'GROUNDING/flickr30k/tsv/train-00.tsv'),
+            )
+        }
+
+        # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # 
+
+        self.SBUGrounding = {   
+            "target": "dataset.tsv_dataset.TSVDataset",
+            "train_params":dict(
+                tsv_path=os.path.join(ROOT,'GROUNDING/SBU/tsv/train-00.tsv'),
+            )
+        }
+
+
+        # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # 
+
+
+        self.CC3MGrounding = {   
+            "target": "dataset.tsv_dataset.TSVDataset",
+            "train_params":dict(
+                tsv_path=os.path.join(ROOT,'GROUNDING/CC3M/tsv/train-00.tsv'),
+            )
+        }
+
+
+        # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # 
+
+
+        self.CC12MGrounding = {   
+            "target": "dataset.tsv_dataset.TSVDataset",
+            "train_params":dict(
+                tsv_path=os.path.join(ROOT,'GROUNDING/CC12M/tsv/train-00.tsv'),
+            )
+        }
+
+
+        # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # 
+
+        # temp = 'category_embedding_clip.pth' if which_embedder == 'clip' else 'category_embedding_bert.pth' 
+        # obj365_category_embedding_path = os.path.join(ROOT, 'OBJECTS365', temp)
+
+        self.Obj365Detection = {   
+        "target": "dataset.tsv_dataset.TSVDataset",
+        "train_params":dict(
+            tsv_path=os.path.join(ROOT,'OBJECTS365/tsv/train-00.tsv'),
+            ),
+        }
+
+

dataset/cd_dataset.py

@@ -0,0 +1,250 @@
+import json, os, random, math
+from collections import defaultdict
+from copy import deepcopy
+
+import torch
+from torch.utils.data import Dataset
+import torchvision.transforms as transforms
+
+import numpy as np
+from PIL import Image
+from .base_dataset import BaseDataset, check_filenames_in_zipdata, recalculate_box_and_verify_if_valid 
+from io import BytesIO
+
+
+
+def not_in_at_all(list1, list2):
+	for a in list1:
+		if a in list2:
+			return False
+	return True
+
+
+def clean_annotations(annotations):
+	for anno in annotations:
+		anno.pop("segmentation", None)
+		anno.pop("area", None)
+		anno.pop("iscrowd", None)
+		# anno.pop("id", None)
+
+
+def make_a_sentence(obj_names, clean=False):
+
+	if clean:
+		obj_names = [ name[:-6] if ("-other" in name) else name for name in obj_names]
+
+	caption = ""
+	tokens_positive = []
+	for obj_name in obj_names:
+		start_len = len(caption)
+		caption += obj_name
+		end_len = len(caption)
+		caption += ", "
+		tokens_positive.append(
+			[[start_len, end_len]] # in real caption, positive tokens can be disjoint, thus using list of list
+		)
+	caption = caption[:-2] # remove last ", "
+
+	return caption #, tokens_positive
+
+
+def check_all_have_same_images(instances_data, stuff_data, caption_data):
+	if stuff_data is not None:
+		assert instances_data["images"] == stuff_data["images"]
+	if caption_data is not None:
+		assert instances_data["images"] == caption_data["images"]
+
+
+class CDDataset(BaseDataset):
+	"CD: Caption Detection"
+	def __init__(self, 
+                image_root,
+				category_embedding_path,
+				instances_json_path = None,
+				stuff_json_path = None,
+				caption_json_path = None,
+				prob_real_caption = 0,
+				fake_caption_type = 'empty',
+                image_size=256, 
+                max_images=None,
+                min_box_size=0.01,
+                max_boxes_per_image=8,
+                include_other=False, 
+				random_crop = False,
+				random_flip = True,
+                ):
+		super().__init__(random_crop, random_flip, image_size)
+
+		self.image_root = image_root
+		self.category_embedding_path = category_embedding_path
+		self.instances_json_path = instances_json_path
+		self.stuff_json_path = stuff_json_path
+		self.caption_json_path = caption_json_path
+		self.prob_real_caption = prob_real_caption
+		self.fake_caption_type = fake_caption_type
+		self.max_images = max_images
+		self.min_box_size = min_box_size
+		self.max_boxes_per_image = max_boxes_per_image
+		self.include_other = include_other
+
+
+		assert fake_caption_type in ["empty", "made"]
+		if prob_real_caption > 0:
+			assert caption_json_path is not None, "caption json must be given"
+	
+
+		# Load all jsons 
+		with open(instances_json_path, 'r') as f:
+			instances_data = json.load(f) # keys: 'info', 'images', 'licenses', 'categories', 'annotations'
+		clean_annotations(instances_data["annotations"])
+		self.instances_data = instances_data
+
+		self.stuff_data = None
+		if stuff_json_path is not None:
+			with open(stuff_json_path, 'r') as f:
+				stuff_data = json.load(f) # keys: 'info', 'images', 'licenses', 'categories', 'annotations'
+			clean_annotations(stuff_data["annotations"])
+			self.stuff_data = stuff_data
+
+		self.captions_data = None
+		if caption_json_path is not None:
+			with open(caption_json_path, 'r') as f:
+				captions_data = json.load(f) # keys: 'info', 'images', 'licenses', 'categories', 'annotations'
+			clean_annotations(captions_data["annotations"])
+			self.captions_data = captions_data
+
+
+		# Load preprocessed name embedding 
+		self.category_embeddings = torch.load(category_embedding_path)
+		self.embedding_len = list( self.category_embeddings.values() )[0].shape[0]
+		
+
+		# Misc  
+		self.image_ids = [] # main list for selecting images
+		self.image_id_to_filename = {} # file names used to read image
+		check_all_have_same_images(self.instances_data, self.stuff_data, self.captions_data)
+		for image_data in self.instances_data['images']:
+			image_id = image_data['id']
+			filename = image_data['file_name']
+			self.image_ids.append(image_id)
+			self.image_id_to_filename[image_id] = filename
+
+		
+		# All category names (including things and stuff)
+		self.object_idx_to_name = {} 
+		for category_data in self.instances_data['categories']:
+			self.object_idx_to_name[category_data['id']] = category_data['name']
+		if self.stuff_data is not None:
+			for category_data in self.stuff_data['categories']:
+				self.object_idx_to_name[category_data['id']] = category_data['name']
+
+
+		# Add object data from instances and stuff 
+		self.image_id_to_objects = defaultdict(list)
+		self.select_objects( self.instances_data['annotations'] )
+		if self.stuff_data is not None:
+			self.select_objects( self.stuff_data['annotations'] )
+
+		# Add caption data 
+		if self.captions_data is not None:
+			self.image_id_to_captions = defaultdict(list)
+			self.select_captions( self.captions_data['annotations'] )
+
+		# Check if all filenames can be found in the zip file
+		# all_filenames = [self.image_id_to_filename[idx] for idx in self.image_ids]
+		# check_filenames_in_zipdata(all_filenames, image_root)
+		
+
+	def select_objects(self, annotations):
+		for object_anno in annotations:
+			image_id = object_anno['image_id']
+			object_name = self.object_idx_to_name[object_anno['category_id']]
+			other_ok = object_name != 'other' or self.include_other
+			if other_ok:
+				self.image_id_to_objects[image_id].append(object_anno)
+
+
+	def select_captions(self, annotations):
+		for caption_data in annotations:
+			image_id = caption_data['image_id']
+			self.image_id_to_captions[image_id].append(caption_data)
+
+
+	def total_images(self):
+		return len(self)
+
+
+	def __getitem__(self, index):
+		if self.max_boxes_per_image > 99:
+			assert False, "Are you sure setting such large number of boxes?"
+
+		out = {}
+
+		image_id = self.image_ids[index]
+		out['id'] = image_id
+		
+		# Image 
+		filename = self.image_id_to_filename[image_id]
+		image = self.fetch_image(filename)
+		#WW, HH = image.size
+		image_tensor, trans_info = self.transform_image(image)
+		out["image"] = image_tensor
+	
+
+		# Select valid boxes after cropping (center or random)
+		this_image_obj_annos = deepcopy(self.image_id_to_objects[image_id])
+		areas = []
+		all_obj_names = []
+		all_boxes = []
+		all_masks = []
+		all_positive_embeddings = []
+		for object_anno in this_image_obj_annos:
+
+			x, y, w, h = object_anno['bbox']
+			valid, (x0, y0, x1, y1) = recalculate_box_and_verify_if_valid(x, y, w, h, trans_info, self.image_size, self.min_box_size)
+
+			if valid:
+				areas.append(  (x1-x0)*(y1-y0) )
+				obj_name = self.object_idx_to_name[ object_anno['category_id']  ]
+				all_obj_names.append(obj_name)
+				all_boxes.append( torch.tensor([x0,y0,x1,y1]) / self.image_size ) # scale to 0-1
+				all_masks.append(1)
+				all_positive_embeddings.append( self.category_embeddings[obj_name]  )
+
+		wanted_idxs = torch.tensor(areas).sort(descending=True)[1]
+		wanted_idxs = wanted_idxs[0:self.max_boxes_per_image]
+		obj_names = [] # used for making a sentence
+		boxes = torch.zeros(self.max_boxes_per_image, 4)
+		masks = torch.zeros(self.max_boxes_per_image)
+		positive_embeddings = torch.zeros(self.max_boxes_per_image, self.embedding_len)
+		for i, idx in enumerate(wanted_idxs):
+			obj_names.append(  all_obj_names[idx]   )
+			boxes[i] = all_boxes[idx]
+			masks[i] = all_masks[idx]
+			positive_embeddings[i] = all_positive_embeddings[idx]
+
+		# Caption
+		if random.uniform(0, 1) < self.prob_real_caption:
+			caption_data = self.image_id_to_captions[image_id]
+			idx = random.randint(0,  len(caption_data)-1 )
+			caption = caption_data[idx]["caption"]
+		else:
+			if self.fake_caption_type == "empty":
+				caption = ""
+			else:
+				caption = make_a_sentence(obj_names, clean=True)
+		
+		
+		out["caption"] = caption
+		out["boxes"] = boxes
+		out["masks"] = masks
+		out["positive_embeddings"] = positive_embeddings
+
+		return out 
+
+
+	def __len__(self):
+		if self.max_images is None:
+			return len(self.image_ids)
+		return min(len(self.image_ids), self.max_images)	
+

dataset/concat_dataset.py

@@ -0,0 +1,65 @@
+from .catalog import DatasetCatalog
+from ldm.util import instantiate_from_config
+import torch 
+
+
+
+
+class ConCatDataset():
+    def __init__(self, dataset_name_list, ROOT, which_embedder, train=True, repeats=None):
+        self.datasets = [] 
+        cul_previous_dataset_length = 0 
+        offset_map = []
+        which_dataset = []
+
+        if repeats is None:
+            repeats = [1] * len(dataset_name_list)
+        else:
+            assert len(repeats) == len(dataset_name_list)
+            
+
+        Catalog = DatasetCatalog(ROOT, which_embedder)
+        for dataset_idx, (dataset_name, yaml_params) in enumerate(dataset_name_list.items()):
+            repeat = repeats[dataset_idx]
+
+            dataset_dict = getattr(Catalog, dataset_name)
+            
+            target = dataset_dict['target']
+            params = dataset_dict['train_params'] if train else dataset_dict['val_params']
+            if yaml_params is not None:
+                params.update(yaml_params)
+            dataset = instantiate_from_config( dict(target=target, params=params) )
+            
+            self.datasets.append(dataset)
+            for _ in range(repeat):
+                offset_map.append(  torch.ones(len(dataset))*cul_previous_dataset_length  )
+                which_dataset.append(  torch.ones(len(dataset))*dataset_idx  )
+                cul_previous_dataset_length += len(dataset)
+        offset_map = torch.cat(offset_map, dim=0).long()
+        self.total_length = cul_previous_dataset_length
+
+        self.mapping = torch.arange(self.total_length) - offset_map
+        self.which_dataset = torch.cat(which_dataset, dim=0).long()
+
+
+    def total_images(self):
+        count = 0
+        for dataset in self.datasets:
+            print(dataset.total_images())
+            count += dataset.total_images()
+        return count
+
+
+
+    def __getitem__(self, idx):
+        dataset = self.datasets[ self.which_dataset[idx] ]   
+        return dataset[ self.mapping[idx] ]     
+
+
+    def __len__(self):
+        return self.total_length
+            
+
+
+
+

dataset/grounding_dataset.py

@@ -0,0 +1,205 @@
+from tkinter.messagebox import NO
+import torch 
+import json 
+from collections import defaultdict
+from PIL import Image, ImageDraw
+from copy import deepcopy
+import os 
+import torchvision.transforms as transforms
+import torchvision
+from .base_dataset import BaseDataset, check_filenames_in_zipdata, recalculate_box_and_verify_if_valid  
+from io import BytesIO
+import random
+
+def check_unique(images, fields):
+    for field in fields:
+        temp_list = []
+        for img_info in images:
+            temp_list.append(img_info[field])
+        assert len(set(temp_list)) == len(temp_list), field
+
+def clean_data(data):
+    for data_info in data:
+        data_info.pop("original_img_id", None)
+        data_info.pop("original_id", None)
+        data_info.pop("sentence_id", None)  # sentence id for each image (multiple sentences for one image)
+        data_info.pop("dataset_name", None)  
+        data_info.pop("data_source", None) 
+        data_info["data_id"] = data_info.pop("id")
+
+
+def clean_annotations(annotations):
+    for anno_info in annotations:
+        anno_info.pop("iscrowd", None) # I have checked that all 0 for flickr, vg, coco
+        anno_info.pop("category_id", None)  # I have checked that all 1 for flickr vg. This is not always 1 for coco, but I do not think we need this annotation
+        anno_info.pop("area", None)
+        # anno_info.pop("id", None)
+        anno_info["data_id"] = anno_info.pop("image_id")
+
+
+def draw_box(img, boxes):
+    draw = ImageDraw.Draw(img)
+    for box in boxes:
+        draw.rectangle([box[0], box[1], box[2], box[3]], outline ="red", width=2) # x0 y0 x1 y1 
+    return img 
+
+
+def xyhw2xyxy(box):
+    x0, y0, w, h = box
+    return [ x0, y0, x0+w, y0+h ]
+
+
+
+class GroundingDataset(BaseDataset):
+    def __init__(self, 
+                image_root, 
+                json_path,
+                annotation_embedding_path,
+                prob_real_caption=1,
+                image_size=256, 
+                min_box_size=0.01,
+                max_boxes_per_data=8,
+                max_images=None, # set as 30K used to eval
+                random_crop = False,
+                random_flip = True,
+                ):
+        super().__init__(image_root, random_crop, random_flip, image_size)
+        self.image_root = image_root
+        self.json_path = json_path
+        self.annotation_embedding_path = annotation_embedding_path
+        self.prob_real_caption = prob_real_caption
+        self.min_box_size = min_box_size
+        self.max_boxes_per_data = max_boxes_per_data
+        self.max_images = max_images
+
+
+        # Load raw data 
+        with open(json_path, 'r') as f:
+            json_raw = json.load(f) # keys: 'info', 'images', 'licenses', 'categories', 'annotations'
+        self.data = json_raw["images"] # donot name it images, which is misleading
+        self.annotations = json_raw["annotations"]
+
+        
+        # Load preprocessed name embedding 
+        if 'bert' in annotation_embedding_path:
+            self.embedding_len = 1280
+        elif 'clip' in annotation_embedding_path:
+            self.embedding_len = 768
+        else:
+            assert False
+
+
+        # clean data and annotation
+        check_unique( self.data, ['id'] )
+        check_unique( self.annotations, ['id'] )
+        clean_data(self.data)
+        clean_annotations(self.annotations)
+        self.data_id_list = [  datum['data_id'] for datum in self.data   ]
+        self.data = { datum['data_id']:datum  for datum in self.data } # map self.data from a list into a dict 
+
+
+        # data point to its annotation mapping 
+        self.data_id_to_annos = defaultdict(list)
+        for anno in self.annotations:
+            self.data_id_to_annos[ anno["data_id"] ].append(anno)
+
+        
+
+        # These are not used that offen, but are useful in some cases
+        self.file_names = [] # all training images 
+        self.file_name_to_data_ids = defaultdict(list) # for each image, there are multiple data points (captions)
+        for data_id in self.data_id_list:
+            fine_name = self.data[data_id]["file_name"]
+            self.file_names.append(fine_name)
+            self.file_name_to_data_ids[fine_name].append(data_id)
+        self.file_names = list(set(self.file_names))
+
+
+        if self.max_images is not None:
+            "This is only used as COCO2017P evulation, when we set max_images as 30k"
+            assert False, 'I have commented out the following code to save cpu memory'
+            # new_data_id_list = []
+            # new_file_name_to_data_ids = defaultdict(list)
+            # self.file_names = self.file_names[0:self.max_images]
+            # for file_name in self.file_names:
+            #     data_id = self.file_name_to_data_ids[file_name][0]
+            #     new_data_id_list.append(data_id)
+            #     new_file_name_to_data_ids[file_name].append(data_id)
+            # self.data_id_list = new_data_id_list
+            # self.file_name_to_data_ids = new_file_name_to_data_ids
+
+
+		# Check if all filenames can be found in the zip file
+        # all_filenames = [self.data[idx]['file_name']  for idx in self.data_id_list ]
+        # check_filenames_in_zipdata(all_filenames, image_root)  
+         
+
+    def total_images(self):
+        return len(self.file_names)
+
+
+    def __getitem__(self, index):
+        if self.max_boxes_per_data > 99:
+            assert False, "Are you sure setting such large number of boxes?"
+
+        out = {}
+
+        data_id = self.data_id_list[index]
+        out['id'] = data_id
+        
+
+        # Image and caption 
+        file_name = self.data[data_id]['file_name']
+        image = self.fetch_image(file_name)
+        image_tensor, trans_info = self.transform_image(image)
+        out["image"] = image_tensor
+
+        if random.uniform(0, 1) < self.prob_real_caption:
+            out["caption"] = self.data[data_id]["caption"]
+        else:
+            out["caption"] = ""
+
+        
+
+        annos = deepcopy(self.data_id_to_annos[data_id])
+        areas = []
+        all_boxes = []
+        all_masks = []
+        all_positive_embeddings = []
+
+
+        for anno in annos:
+
+            x, y, w, h = anno['bbox']
+            valid, (x0, y0, x1, y1) = recalculate_box_and_verify_if_valid(x, y, w, h, trans_info, self.image_size, self.min_box_size)
+
+            if valid:
+                areas.append(  (x1-x0)*(y1-y0)  )
+                all_boxes.append( torch.tensor([x0,y0,x1,y1]) / self.image_size ) # scale to 0-1
+                all_masks.append(1)
+                all_positive_embeddings.append( torch.load(os.path.join(self.annotation_embedding_path,str(anno["id"])), map_location='cpu'  )  )
+                
+        wanted_idxs = torch.tensor(areas).sort(descending=True)[1]
+        wanted_idxs = wanted_idxs[0:self.max_boxes_per_data]
+
+        boxes = torch.zeros(self.max_boxes_per_data, 4)
+        masks = torch.zeros(self.max_boxes_per_data)
+        positive_embeddings = torch.zeros(self.max_boxes_per_data, self.embedding_len)
+        for i, idx in enumerate(wanted_idxs):
+            boxes[i] = all_boxes[idx]
+            masks[i] = all_masks[idx]
+            positive_embeddings[i] = all_positive_embeddings[idx]
+
+
+        out["boxes"] = boxes
+        out["masks"] = masks
+        out["positive_embeddings"] = positive_embeddings      
+        
+        return out
+
+
+
+    def __len__(self):
+        return len(self.data_id_list)
+
+

dataset/layout_dataset.py

@@ -0,0 +1,237 @@
+import json, os, random, math
+from collections import defaultdict
+from copy import deepcopy
+
+import torch
+from torch.utils.data import Dataset
+import torchvision.transforms as transforms
+
+import numpy as np
+from PIL import Image, ImageOps
+from .base_dataset import BaseDataset, check_filenames_in_zipdata 
+from io import BytesIO
+
+
+
+
+def clean_annotations(annotations):
+	for anno in annotations:
+		anno.pop("segmentation", None)
+		anno.pop("area", None)
+		anno.pop("iscrowd", None)
+		anno.pop("id", None)
+
+
+def make_a_sentence(obj_names, clean=False):
+
+	if clean:
+		obj_names = [ name[:-6] if ("-other" in name) else name for name in obj_names]
+
+	caption = ""
+	tokens_positive = []
+	for obj_name in obj_names:
+		start_len = len(caption)
+		caption += obj_name
+		end_len = len(caption)
+		caption += ", "
+		tokens_positive.append(
+			[[start_len, end_len]] # in real caption, positive tokens can be disjoint, thus using list of list
+		)
+	caption = caption[:-2] # remove last ", "
+
+	return caption #, tokens_positive
+
+
+class LayoutDataset(BaseDataset):
+	"""
+	Note: this dataset can somehow be achieved in cd_dataset.CDDataset
+	Since if you donot set prob_real_caption=0 in CDDataset, then that 
+	dataset will only use detection annotations. However, in that dataset, 
+	we do not remove images but remove boxes. 
+
+	However, in layout2img works, people will just resize raw image data into 256*256,
+	thus they pre-calculate box size and apply min_box_size before min/max_boxes_per_image.
+	And then they will remove images if does not follow the rule. 
+
+	These two different methods will lead to different number of training/val images. 
+	Thus this dataset here is only for layout2img.
+
+	"""
+	def __init__(self, 
+                image_root,
+				instances_json_path,
+				stuff_json_path,
+				category_embedding_path,
+				fake_caption_type = 'empty', 
+                image_size=256, 
+                max_samples=None,
+                min_box_size=0.02,
+                min_boxes_per_image=3, 
+                max_boxes_per_image=8,
+                include_other=False, 
+				random_flip=True
+                ):
+		super().__init__(random_crop=None, random_flip=None, image_size=None) # we only use vis_getitem func in BaseDataset, donot use the others. 
+
+		assert fake_caption_type in ['empty', 'made']
+		self.image_root = image_root
+		self.instances_json_path = instances_json_path
+		self.stuff_json_path = stuff_json_path
+		self.category_embedding_path = category_embedding_path
+		self.fake_caption_type = fake_caption_type
+		self.image_size = image_size
+		self.max_samples = max_samples
+		self.min_box_size = min_box_size
+		self.min_boxes_per_image = min_boxes_per_image
+		self.max_boxes_per_image = max_boxes_per_image
+		self.include_other = include_other
+		self.random_flip = random_flip
+
+	
+		self.transform = transforms.Compose([transforms.Resize( (image_size, image_size) ),
+											 transforms.ToTensor(),
+											 transforms.Lambda(lambda t: (t * 2) - 1) ])
+		
+		# Load all jsons 
+		with open(instances_json_path, 'r') as f:
+			instances_data = json.load(f) # keys: 'info', 'images', 'licenses', 'categories', 'annotations'
+		clean_annotations(instances_data["annotations"])
+		self.instances_data = instances_data
+
+		with open(stuff_json_path, 'r') as f:
+			stuff_data = json.load(f) # keys: 'info', 'images', 'licenses', 'categories', 'annotations'
+		clean_annotations(stuff_data["annotations"])
+		self.stuff_data = stuff_data
+
+
+		# Load preprocessed name embedding 
+		self.category_embeddings = torch.load(category_embedding_path)
+		self.embedding_len = list( self.category_embeddings.values() )[0].shape[0]
+		
+
+		# Misc  
+		self.image_ids = [] # main list for selecting images
+		self.image_id_to_filename = {} # file names used to read image
+		self.image_id_to_size = {} # original size of this image 
+		assert instances_data['images'] == stuff_data["images"] 
+		for image_data in instances_data['images']:
+			image_id = image_data['id']
+			filename = image_data['file_name']
+			width = image_data['width']
+			height = image_data['height']
+			self.image_ids.append(image_id)
+			self.image_id_to_filename[image_id] = filename
+			self.image_id_to_size[image_id] = (width, height)
+		
+		# All category names (including things and stuff)
+		self.things_id_list = []
+		self.stuff_id_list = []
+		self.object_idx_to_name = {} 
+		for category_data in instances_data['categories']:
+			self.things_id_list.append( category_data['id'] )
+			self.object_idx_to_name[category_data['id']] = category_data['name']
+		for category_data in stuff_data['categories']:
+			self.stuff_id_list.append( category_data['id'] )
+			self.object_idx_to_name[category_data['id']] = category_data['name']
+		self.all_categories = [   self.object_idx_to_name.get(k, None) for k in range(183+1) ] 
+
+
+		# Add object data from instances and stuff 
+		self.image_id_to_objects = defaultdict(list)
+		self.select_objects( instances_data['annotations'] )
+		self.select_objects( stuff_data['annotations'] )
+
+
+		# Prune images that have too few or too many objects
+		new_image_ids = []
+		for image_id in self.image_ids:
+			num_objs = len(self.image_id_to_objects[image_id])
+			if self.min_boxes_per_image <= num_objs <= self.max_boxes_per_image:
+				new_image_ids.append(image_id)
+		self.image_ids = new_image_ids
+
+
+		# Check if all filenames can be found in the zip file
+		all_filenames = [self.image_id_to_filename[idx] for idx in self.image_ids]
+		check_filenames_in_zipdata(all_filenames, image_root)
+		
+
+
+	def select_objects(self, annotations):
+		for object_anno in annotations:
+			image_id = object_anno['image_id']
+			_, _, w, h = object_anno['bbox']
+			W, H = self.image_id_to_size[image_id]
+			box_area = (w * h) / (W * H)
+			box_ok = box_area > self.min_box_size
+			object_name = self.object_idx_to_name[object_anno['category_id']]
+			other_ok = object_name != 'other' or self.include_other
+			if box_ok and other_ok:
+				self.image_id_to_objects[image_id].append(object_anno)
+
+
+	def total_images(self):
+		return len(self)
+
+
+	def __getitem__(self, index):
+		if self.max_boxes_per_image > 99:
+			assert False, "Are you sure setting such large number of boxes?"
+
+		out = {}
+
+		image_id = self.image_ids[index]
+		out['id'] = image_id
+
+		flip = self.random_flip and random.random()<0.5
+		
+		# Image 
+		filename = self.image_id_to_filename[image_id]
+		zip_file = self.fetch_zipfile(self.image_root)
+		image = Image.open(BytesIO(zip_file.read(filename))).convert('RGB')
+		WW, HH = image.size
+		if flip:
+			image = ImageOps.mirror(image)
+		out["image"] = self.transform(image)
+
+		this_image_obj_annos = deepcopy(self.image_id_to_objects[image_id])
+
+		# Make a sentence 
+		obj_names = [] # used for make a sentence
+		boxes = torch.zeros(self.max_boxes_per_image, 4)
+		masks = torch.zeros(self.max_boxes_per_image)
+		positive_embeddings = torch.zeros(self.max_boxes_per_image, self.embedding_len)
+		for idx, object_anno in enumerate(this_image_obj_annos):
+			obj_name = self.object_idx_to_name[ object_anno['category_id']  ]
+			obj_names.append(obj_name)
+			x, y, w, h = object_anno['bbox']
+			x0 = x / WW
+			y0 = y / HH
+			x1 = (x + w) / WW
+			y1 = (y + h) / HH
+			if flip:
+				x0, x1 = 1-x1, 1-x0
+			boxes[idx] = torch.tensor([x0,y0,x1,y1])
+			masks[idx] = 1 
+			positive_embeddings[idx] = self.category_embeddings[obj_name] 
+
+		if self.fake_caption_type == 'empty':
+			caption = ""
+		else:
+			caption = make_a_sentence(obj_names, clean=True)
+	
+		out["caption"] = caption	
+		out["boxes"] = boxes
+		out["masks"] = masks
+		out["positive_embeddings"] = positive_embeddings
+
+
+		return out 
+
+
+	def __len__(self):
+		if self.max_samples is None:
+			return len(self.image_ids)
+		return min(len(self.image_ids), self.max_samples)	
+
+

dataset/tsv.py

@@ -0,0 +1,212 @@
+import os
+import os.path as op
+import gc
+import json
+from typing import List
+import logging
+
+try:
+    from .blob_storage import BlobStorage, disk_usage
+except:
+    class BlobStorage:
+        pass
+
+
+def generate_lineidx(filein: str, idxout: str) -> None:
+    idxout_tmp = idxout + '.tmp'
+    with open(filein, 'r') as tsvin, open(idxout_tmp, 'w') as tsvout:
+        fsize = os.fstat(tsvin.fileno()).st_size
+        fpos = 0
+        while fpos != fsize:
+            tsvout.write(str(fpos) + "\n")
+            tsvin.readline()
+            fpos = tsvin.tell()
+    os.rename(idxout_tmp, idxout)
+
+
+def read_to_character(fp, c):
+    result = []
+    while True:
+        s = fp.read(32)
+        assert s != ''
+        if c in s:
+            result.append(s[: s.index(c)])
+            break
+        else:
+            result.append(s)
+    return ''.join(result)
+
+
+class TSVFile(object):
+    def __init__(self,
+                 tsv_file: str,
+                 if_generate_lineidx: bool = False,
+                 lineidx: str = None,
+                 class_selector: List[str] = None,
+                 blob_storage: BlobStorage = None):
+        self.tsv_file = tsv_file
+        self.lineidx = op.splitext(tsv_file)[0] + '.lineidx' \
+            if not lineidx else lineidx
+        self.linelist = op.splitext(tsv_file)[0] + '.linelist'
+        self.chunks = op.splitext(tsv_file)[0] + '.chunks'
+        self._fp = None
+        self._lineidx = None
+        self._sample_indices = None
+        self._class_boundaries = None
+        self._class_selector = class_selector
+        self._blob_storage = blob_storage
+        self._len = None
+        # the process always keeps the process which opens the file.
+        # If the pid is not equal to the currrent pid, we will re-open the file.
+        self.pid = None
+        # generate lineidx if not exist
+        if not op.isfile(self.lineidx) and if_generate_lineidx:
+            generate_lineidx(self.tsv_file, self.lineidx)
+
+    def __del__(self):
+        self.gcidx()
+        if self._fp:
+            self._fp.close()
+            # physically remove the tsv file if it is retrieved by BlobStorage
+            if self._blob_storage and 'azcopy' in self.tsv_file and os.path.exists(self.tsv_file):
+                try:
+                    original_usage = disk_usage('/')
+                    os.remove(self.tsv_file)
+                    logging.info("Purged %s (disk usage: %.2f%% => %.2f%%)" %
+                                 (self.tsv_file, original_usage, disk_usage('/') * 100))
+                except:
+                    # Known issue: multiple threads attempting to delete the file will raise a FileNotFound error.
+                    # TODO: try Threadling.Lock to better handle the race condition
+                    pass
+
+    def __str__(self):
+        return "TSVFile(tsv_file='{}')".format(self.tsv_file)
+
+    def __repr__(self):
+        return str(self)
+
+    def gcidx(self):
+        logging.debug('Run gc collect')
+        self._lineidx = None
+        self._sample_indices = None
+        #self._class_boundaries = None
+        return gc.collect()
+
+    def get_class_boundaries(self):
+        return self._class_boundaries
+
+    def num_rows(self, gcf=False):
+        if (self._len is None):
+            self._ensure_lineidx_loaded()
+            retval = len(self._sample_indices)
+
+            if (gcf):
+                self.gcidx()
+
+            self._len = retval
+
+        return self._len
+
+    def seek(self, idx: int):
+        self._ensure_tsv_opened()
+        self._ensure_lineidx_loaded()
+        try:
+            pos = self._lineidx[self._sample_indices[idx]]
+        except:
+            logging.info('=> {}-{}'.format(self.tsv_file, idx))
+            raise
+        self._fp.seek(pos)
+        return [s.strip() for s in self._fp.readline().split('\t')]
+
+    def seek_first_column(self, idx: int):
+        self._ensure_tsv_opened()
+        self._ensure_lineidx_loaded()
+        pos = self._lineidx[idx]
+        self._fp.seek(pos)
+        return read_to_character(self._fp, '\t')
+
+    def get_key(self, idx: int):
+        return self.seek_first_column(idx)
+
+    def __getitem__(self, index: int):
+        return self.seek(index)
+
+    def __len__(self):
+        return self.num_rows()
+
+    def _ensure_lineidx_loaded(self):
+        if self._lineidx is None:
+            logging.debug('=> loading lineidx: {}'.format(self.lineidx))
+            with open(self.lineidx, 'r') as fp:
+                lines = fp.readlines()
+                lines = [line.strip() for line in lines]
+                self._lineidx = [int(line) for line in lines]
+
+            # read the line list if exists
+            linelist = None
+            if op.isfile(self.linelist):
+                with open(self.linelist, 'r') as fp:
+                    linelist = sorted(
+                        [
+                            int(line.strip())
+                            for line in fp.readlines()
+                        ]
+                    )
+
+            if op.isfile(self.chunks):
+                self._sample_indices = []
+                self._class_boundaries = []
+                class_boundaries = json.load(open(self.chunks, 'r'))
+                for class_name, boundary in class_boundaries.items():
+                    start = len(self._sample_indices)
+                    if class_name in self._class_selector:
+                        for idx in range(boundary[0], boundary[1] + 1):
+                            # NOTE: potentially slow when linelist is long, try to speed it up
+                            if linelist and idx not in linelist:
+                                continue
+                            self._sample_indices.append(idx)
+                    end = len(self._sample_indices)
+                    self._class_boundaries.append((start, end))
+            else:
+                if linelist:
+                    self._sample_indices = linelist
+                else:
+                    self._sample_indices = list(range(len(self._lineidx)))
+
+    def _ensure_tsv_opened(self):
+        if self._fp is None:
+            if self._blob_storage:
+                self._fp = self._blob_storage.open(self.tsv_file)
+            else:
+                self._fp = open(self.tsv_file, 'r')
+            self.pid = os.getpid()
+
+        if self.pid != os.getpid():
+            logging.debug('=> re-open {} because the process id changed'.format(self.tsv_file))
+            self._fp = open(self.tsv_file, 'r')
+            self.pid = os.getpid()
+
+
+class TSVWriter(object):
+    def __init__(self, tsv_file):
+        self.tsv_file = tsv_file
+        self.lineidx_file = op.splitext(tsv_file)[0] + '.lineidx'
+        self.tsv_file_tmp = self.tsv_file + '.tmp'
+        self.lineidx_file_tmp = self.lineidx_file + '.tmp'
+
+        self.tsv_fp = open(self.tsv_file_tmp, 'w')
+        self.lineidx_fp = open(self.lineidx_file_tmp, 'w')
+
+        self.idx = 0
+
+    def write(self, values, sep='\t'):
+        v = '{0}\n'.format(sep.join(map(str, values)))
+        self.tsv_fp.write(v)
+        self.lineidx_fp.write(str(self.idx) + '\n')
+        self.idx = self.idx + len(v)
+
+    def close(self):
+        self.tsv_fp.close()
+        self.lineidx_fp.close()
+        os.rename(self.tsv_file_tmp, self.tsv_file)
+        os.rename(self.lineidx_file_tmp, self.lineidx_file)

dataset/tsv_dataset.py

@@ -0,0 +1,326 @@
+from tkinter.messagebox import NO
+import torch 
+import json 
+from collections import defaultdict
+from PIL import Image, ImageDraw
+from copy import deepcopy
+import os 
+import torchvision.transforms as transforms
+import torchvision
+from .base_dataset import BaseDataset, check_filenames_in_zipdata, recalculate_box_and_verify_if_valid  
+from io import BytesIO
+import random
+
+from .tsv import TSVFile
+
+from io import BytesIO
+import base64
+from PIL import Image
+import numpy as np
+
+
+def decode_base64_to_pillow(image_b64):
+    return Image.open(BytesIO(base64.b64decode(image_b64))).convert('RGB')
+
+def decode_tensor_from_string(arr_str, use_tensor=True):
+    arr = np.frombuffer(base64.b64decode(arr_str), dtype='float32')
+    if use_tensor:
+        arr = torch.from_numpy(arr)
+    return arr
+
+def decode_item(item):
+    item = json.loads(item)
+    item['image'] = decode_base64_to_pillow(item['image'])
+
+    for anno in item['annos']:
+        anno['image_embedding_before'] = decode_tensor_from_string(anno['image_embedding_before'])
+        anno['text_embedding_before'] = decode_tensor_from_string(anno['text_embedding_before'])
+        anno['image_embedding_after'] = decode_tensor_from_string(anno['image_embedding_after'])
+        anno['text_embedding_after'] = decode_tensor_from_string(anno['text_embedding_after'])
+    return item
+
+def check_unique(images, fields):
+    for field in fields:
+        temp_list = []
+        for img_info in images:
+            temp_list.append(img_info[field])
+        assert len(set(temp_list)) == len(temp_list), field
+
+def clean_data(data):
+    for data_info in data:
+        data_info.pop("original_img_id", None)
+        data_info.pop("original_id", None)
+        data_info.pop("sentence_id", None)  # sentence id for each image (multiple sentences for one image)
+        data_info.pop("dataset_name", None)  
+        data_info.pop("data_source", None) 
+        data_info["data_id"] = data_info.pop("id")
+
+
+def clean_annotations(annotations):
+    for anno_info in annotations:
+        anno_info.pop("iscrowd", None) # I have checked that all 0 for flickr, vg, coco
+        anno_info.pop("category_id", None)  # I have checked that all 1 for flickr vg. This is not always 1 for coco, but I do not think we need this annotation
+        anno_info.pop("area", None)
+        # anno_info.pop("id", None)
+        anno_info["data_id"] = anno_info.pop("image_id")
+
+
+def draw_box(img, boxes):
+    draw = ImageDraw.Draw(img)
+    for box in boxes:
+        draw.rectangle([box[0], box[1], box[2], box[3]], outline ="red", width=2) # x0 y0 x1 y1 
+    return img 
+
+
+def xyhw2xyxy(box):
+    x0, y0, w, h = box
+    return [ x0, y0, x0+w, y0+h ]
+
+
+def make_a_sentence(obj_names, clean=False):
+
+    if clean:
+        obj_names = [ name[:-6] if ("-other" in name) else name for name in obj_names]
+
+    caption = ""
+    tokens_positive = []
+    for obj_name in obj_names:
+        start_len = len(caption)
+        caption += obj_name
+        end_len = len(caption)
+        caption += ", "
+        tokens_positive.append(
+            [[start_len, end_len]] # in real caption, positive tokens can be disjoint, thus using list of list
+        )
+    caption = caption[:-2] # remove last ", "
+
+    return caption #, tokens_positive
+
+
+def mask_for_random_drop_text_or_image_feature(masks, random_drop_embedding):
+    """
+    input masks tell how many valid grounding tokens for this image
+    e.g., 1,1,1,1,0,0,0,0,0,0...
+
+    If random_drop_embedding=both.  we will random drop either image or
+    text feature for each token, 
+    but we always make sure there is at least one feature used. 
+    In other words, the following masks are not valid 
+    (because for the second obj, no feature at all):
+    image: 1,0,1,1,0,0,0,0,0
+    text:  1,0,0,0,0,0,0,0,0
+
+    if random_drop_embedding=image. we will random drop image feature 
+    and always keep the text one.  
+
+    """
+    N = masks.shape[0]
+
+    if random_drop_embedding=='both':
+        temp_mask = torch.ones(2,N)
+        for i in range(N):
+            if random.uniform(0, 1) < 0.5: # else keep both features 
+                idx = random.sample([0,1], 1)[0] # randomly choose to drop image or text feature 
+                temp_mask[idx,i] = 0 
+        image_masks = temp_mask[0]*masks
+        text_masks = temp_mask[1]*masks
+    
+    if random_drop_embedding=='image':
+        image_masks = masks*(torch.rand(N)>0.5)*1
+        text_masks = masks
+
+    return image_masks, text_masks
+
+
+
+
+
+def project(x, projection_matrix):
+    """
+    x (Batch*768) should be the penultimate feature of CLIP (before projection)
+    projection_matrix (768*768) is the CLIP projection matrix, which should be weight.data of Linear layer 
+    defined in CLIP (out_dim, in_dim), thus we need to apply transpose below.  
+    this function will return the CLIP feature (without normalziation)
+    """
+    return x@torch.transpose(projection_matrix, 0, 1)
+
+
+def inv_project(y, projection_matrix):
+    """
+    y (Batch*768) should be the CLIP feature (after projection)
+    projection_matrix (768*768) is the CLIP projection matrix, which should be weight.data of Linear layer 
+    defined in CLIP (out_dim, in_dim).  
+    this function will return the CLIP penultimate feature. 
+    
+    Note: to make sure getting the correct penultimate feature, the input y should not be normalized. 
+    If it is normalized, then the result will be scaled by CLIP feature norm, which is unknown.   
+    """
+    return y@torch.transpose(torch.linalg.inv(projection_matrix), 0, 1)
+
+
+
+
+class TSVDataset(BaseDataset):
+    def __init__(self, 
+                tsv_path,
+                which_embedder='clip',
+                which_layer=['after','after'], # text and image  
+                prob_use_caption=1,
+                random_drop_embedding='none',
+                image_size=256, 
+                min_box_size=0.01,
+                max_boxes_per_data=8,
+                max_images=None, # set as 30K used to eval
+                random_crop = False,
+                random_flip = True,
+                ):
+        image_root = "a placeholder path as we are using tsv here"
+        super().__init__(image_root, random_crop, random_flip, image_size)
+        self.tsv_path = tsv_path
+        self.which_embedder = which_embedder
+        self.prob_use_caption = prob_use_caption
+        self.random_drop_embedding = random_drop_embedding
+        self.min_box_size = min_box_size
+        self.max_boxes_per_data = max_boxes_per_data
+        self.max_images = max_images
+
+        assert which_layer in [ ['after','after'],  ['before','after_renorm'], ['before','after_reproject'] ]
+        assert random_drop_embedding in ['none', 'both', 'image']
+        self.which_layer_text  = which_layer[0]
+        self.which_layer_image = which_layer[1]
+
+        #self.projection_matrix = torch.load(os.path.join(os.path.dirname(__file__), 'projection_matrix')  )
+        self.projection_matrix = torch.load('projection_matrix')
+
+        # Load tsv data
+        self.tsv_file = TSVFile(self.tsv_path)
+
+        
+        # Load preprocessed name embedding 
+        if which_embedder == 'bert':
+            self.embedding_len = 1280
+        elif which_embedder == 'clip':
+            self.embedding_len = 768
+        else:
+            assert False
+
+    def total_images(self):
+        return len(self)
+
+    def get_item_from_tsv(self, index):
+        _, item = self.tsv_file[index]
+        item = decode_item(item)
+        return item
+
+
+    def mapping(self, image_embedding):
+        if self.which_layer_image == 'after':
+            # both use CLIP aligned feature 
+            return image_embedding
+        elif self.which_layer_image == 'after_renorm':
+            # text use before, but image use after projection but normalize to 28.7 
+            return image_embedding*28.7
+        elif self.which_layer_image == 'after_reproject':
+            image_embedding = project( image_embedding.unsqueeze(0), self.projection_matrix.T )
+            image_embedding = image_embedding.squeeze(0)
+            image_embedding = image_embedding / image_embedding.norm() 
+            image_embedding = image_embedding * 28.7 
+            return image_embedding
+
+
+
+    def __getitem__(self, index):
+        if self.max_boxes_per_data > 99:
+            assert False, "Are you sure setting such large number of boxes?"
+
+        raw_item = self.get_item_from_tsv(index)
+        is_det = raw_item.get('is_det', False) # if it is from detection (such as o365), then we will make a caption
+
+        out = {}
+
+        # -------------------- id and image ------------------- # 
+        out['id'] = raw_item['data_id']
+        image = raw_item['image']
+        image_tensor, trans_info = self.transform_image(image)
+        out["image"] = image_tensor
+
+
+
+        # -------------------- grounding token ------------------- # 
+        annos = raw_item['annos']
+        
+        areas = []
+        all_boxes = []
+        all_masks = []
+        all_text_embeddings = []
+        all_image_embeddings = []
+        if is_det:
+            all_category_names = []
+
+        text_embedding_name = 'text_embedding_before' if self.which_layer_text == 'before' else 'text_embedding_after'
+        image_embedding_name = 'image_embedding_after'
+        
+        for anno in annos:
+            x, y, w, h = anno['bbox']
+            valid, (x0, y0, x1, y1) = recalculate_box_and_verify_if_valid(x, y, w, h, trans_info, self.image_size, self.min_box_size)
+
+            if valid:
+                areas.append(  (x1-x0)*(y1-y0)  )
+                all_boxes.append( torch.tensor([x0,y0,x1,y1]) / self.image_size ) # scale to 0-1
+                all_masks.append(1)
+                all_text_embeddings.append(anno[text_embedding_name])
+                all_image_embeddings.append(  self.mapping(anno[image_embedding_name])  )
+                if is_det:
+                    all_category_names.append(anno["category_name"])
+
+                
+        wanted_idxs = torch.tensor(areas).sort(descending=True)[1]
+        wanted_idxs = wanted_idxs[0:self.max_boxes_per_data]
+
+        boxes = torch.zeros(self.max_boxes_per_data, 4)
+        masks = torch.zeros(self.max_boxes_per_data)
+        text_embeddings =  torch.zeros(self.max_boxes_per_data, self.embedding_len)
+        image_embeddings = torch.zeros(self.max_boxes_per_data, self.embedding_len)
+        if is_det:
+            category_names = []
+        for i, idx in enumerate(wanted_idxs):
+            boxes[i] = all_boxes[idx]
+            masks[i] = all_masks[idx]
+            text_embeddings[i] =  all_text_embeddings[idx]
+            image_embeddings[i] = all_image_embeddings[idx]
+            if is_det:
+                category_names.append(all_category_names[idx])
+
+        if self.random_drop_embedding != 'none':
+            image_masks, text_masks = mask_for_random_drop_text_or_image_feature(masks, self.random_drop_embedding)
+        else:
+            image_masks = masks
+            text_masks = masks
+
+
+        out["boxes"] = boxes
+        out["masks"] = masks
+        out["image_masks"] = image_masks
+        out["text_masks"] = text_masks
+        out["text_embeddings"] =  text_embeddings  
+        out["image_embeddings"] = image_embeddings      
+        
+
+
+        # -------------------- caption ------------------- # 
+        if random.uniform(0, 1) < self.prob_use_caption:
+            if is_det:
+                out["caption"] = make_a_sentence(category_names)
+            else:
+                out["caption"] = raw_item["caption"]
+        else:
+            out["caption"] = ""
+
+        return out
+
+
+
+    def __len__(self):
+        return len(self.tsv_file)
+
+

dataset/utils.py

@@ -0,0 +1,116 @@
+#!/usr/bin/python
+#
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import PIL
+import torch
+import torchvision.transforms as T
+
+
+IMAGENET_MEAN = [0.485, 0.456, 0.406]
+IMAGENET_STD = [0.229, 0.224, 0.225]
+
+INV_IMAGENET_MEAN = [-m for m in IMAGENET_MEAN]
+INV_IMAGENET_STD = [1.0 / s for s in IMAGENET_STD]
+
+
+def imagenet_preprocess():
+  return T.Normalize(mean=IMAGENET_MEAN, std=IMAGENET_STD)
+
+
+def rescale(x):
+  lo, hi = x.min(), x.max()
+  return x.sub(lo).div(hi - lo)
+
+
+def imagenet_deprocess(rescale_image=True):
+  transforms = [
+    T.Normalize(mean=[0, 0, 0], std=INV_IMAGENET_STD),
+    T.Normalize(mean=INV_IMAGENET_MEAN, std=[1.0, 1.0, 1.0]),
+  ]
+  if rescale_image:
+    transforms.append(rescale)
+  return T.Compose(transforms)
+
+
+def imagenet_deprocess_batch(imgs, rescale=True):
+  """
+  Input:
+  - imgs: FloatTensor of shape (N, C, H, W) giving preprocessed images
+
+  Output:
+  - imgs_de: ByteTensor of shape (N, C, H, W) giving deprocessed images
+    in the range [0, 255]
+  """
+  if isinstance(imgs, torch.autograd.Variable):
+    imgs = imgs.data
+  imgs = imgs.cpu().clone()
+  deprocess_fn = imagenet_deprocess(rescale_image=rescale)
+  imgs_de = []
+  for i in range(imgs.size(0)):
+    img_de = deprocess_fn(imgs[i])[None]
+    img_de = img_de.mul(255).clamp(0, 255).byte()
+    imgs_de.append(img_de)
+  imgs_de = torch.cat(imgs_de, dim=0)
+  return imgs_de
+
+
+class Resize(object):
+  def __init__(self, size, interp=PIL.Image.BILINEAR):
+    if isinstance(size, tuple):
+      H, W = size
+      self.size = (W, H)
+    else:
+      self.size = (size, size)
+    self.interp = interp
+
+  def __call__(self, img):
+    return img.resize(self.size, self.interp)
+
+
+def unpack_var(v):
+  if isinstance(v, torch.autograd.Variable):
+    return v.data
+  return v
+
+
+def split_graph_batch(triples, obj_data, obj_to_img, triple_to_img):
+  triples = unpack_var(triples)
+  obj_data = [unpack_var(o) for o in obj_data]
+  obj_to_img = unpack_var(obj_to_img)
+  triple_to_img = unpack_var(triple_to_img)
+
+  triples_out = []
+  obj_data_out = [[] for _ in obj_data]
+  obj_offset = 0
+  N = obj_to_img.max() + 1
+  for i in range(N):
+    o_idxs = (obj_to_img == i).nonzero().view(-1)
+    t_idxs = (triple_to_img == i).nonzero().view(-1)
+
+    cur_triples = triples[t_idxs].clone()
+    cur_triples[:, 0] -= obj_offset
+    cur_triples[:, 2] -= obj_offset
+    triples_out.append(cur_triples)
+
+    for j, o_data in enumerate(obj_data):
+      cur_o_data = None
+      if o_data is not None:
+        cur_o_data = o_data[o_idxs]
+      obj_data_out[j].append(cur_o_data)
+
+    obj_offset += o_idxs.size(0)
+
+  return triples_out, obj_data_out

environment.yaml

@@ -0,0 +1,29 @@
+name: gligen_demo
+channels:
+  - xformers/label/dev
+  - pytorch
+  - defaults
+dependencies:
+  - python=3.10.8
+  - pip=22.2.2
+  - cudatoolkit=11.3
+  - pytorch=1.12.1
+  - torchvision=0.13.1
+  - numpy=1.23.1
+  - xformers
+  - pip:
+    - omegaconf==2.1.1
+    - albumentations==1.3.0
+    - opencv-python
+    - imageio==2.9.0
+    - imageio-ffmpeg==0.4.2
+    - pytorch-lightning==1.4.2
+    - test-tube>=0.7.5
+    - streamlit==1.12.1
+    - einops==0.3.0
+    - git+https://github.com/openai/CLIP.git
+    - protobuf~=3.20.1
+    - torchmetrics==0.6.0
+    - transformers==4.19.2
+    - kornia==0.6.0
+    - gradio==3.16.0

gligen/__init__.py

@@ -0,0 +1,10 @@
+
+import os, sys
+sys.path.append(os.path.dirname(__file__))
+sys.path.append(os.path.join(os.path.dirname(__file__), "ldm"))
+
+import gligen.evaluator as evaluator
+import gligen.trainer as trainer
+
+
+# import gligen.ldm as ldm

gligen/create_meta.py

@@ -0,0 +1,170 @@
+CKPTS = [
+
+    dict(
+        path="/home/chunyl/azure_mount/yuhengdb/fine_tune_ldm/version5_branch6_output/GoldG+SBU+CC3M+CC12M+O365/second_stage_drop_both/tag01/checkpoint_00450001.pth",
+        feature_type=['before','after_reproject'],
+        save_folder_name="v5b6_drop_both",
+    ),
+
+
+    # dict(
+    #     path="/home/v-yuhengli/blobfuse/output/fine_tune_ldm/version5_branch6_output/GoldG+SBU+CC3M+CC12M+O365/second_stage_drop_none/tag00/checkpoint_00165001.pth",
+    #     feature_type=['before','after_reproject'],
+    #     save_folder_name="v5b6_drop_none",
+    # ),
+
+
+
+
+
+]
+
+
+
+# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = #
+
+
+
+
+
+
+
+
+    # if meta["has_image_mask"] == 0:
+    #     image_embeddings = text_embeddings
+    # if meta["has_text_mask"] == 0:
+    #     text_embeddings = image_embeddings
+
+    # out = {
+    #     "boxes" : boxes.unsqueeze(0).repeat(batch,1,1),
+    #     "masks" : masks.unsqueeze(0).repeat(batch,1),
+    #     "text_masks" : masks.unsqueeze(0).repeat(batch,1),
+    #     "image_masks" : masks.unsqueeze(0).repeat(batch,1),
+    #     "text_embeddings"  : text_embeddings.unsqueeze(0).repeat(batch,1,1),
+    #     "image_embeddings" : image_embeddings.unsqueeze(0).repeat(batch,1,1)
+    # }
+
+
+
+
+
+
+
+META = [
+
+
+    dict(
+        prompt = "a teddy bear sitting next to a red bird",
+        phrases = ['a teddy bear', 'a red bird'],
+        images = ['images/teddy.jpg', 'images/red_bird.jpg'],
+        locations = [ [0.0,0.09,0.33,0.76], [0.55,0.11,1.0,0.8]   ],
+        alpha_type = [1.0, 0, 0.0], 
+        has_text_mask = 1,  
+        has_image_mask = 0,  
+        save_folder_name="teddy_bird_1_1"
+    ),
+
+
+    # dict(
+    #     prompt = "a teddy bear sitting next to a bird",
+    #     phrases = ['a teddy bear', 'a bird'],
+    #     images = ['images/teddy.jpg', 'images/red_bird.jpg'],
+    #     locations = [ [0.0,0.09,0.33,0.76], [0.55,0.11,1.0,0.8]   ],
+    #     alpha_type = [1.0, 0, 0.0], 
+    #     has_text_mask = 1,  
+    #     has_image_mask = 1,  
+    #     save_folder_name="teddy_bird_1_1"
+    # ),
+
+
+    # dict(
+    #     prompt = "a teddy bear sitting next to a bird",
+    #     phrases = ['a teddy bear', 'a bird'],
+    #     images = ['images/teddy.jpg', 'images/red_bird.jpg'],
+    #     locations = [ [0.0,0.09,0.33,0.76], [0.55,0.11,1.0,0.8]   ],
+    #     alpha_type = [0.5, 0, 0.5], 
+    #     has_text_mask = 1,  
+    #     has_image_mask = 0,  
+    #     save_folder_name="teddy_bird_1_0"
+    # ),
+
+    # dict(
+    #     prompt = "",
+    #     phrases = ['a teddy bear', 'an umbrella'],
+    #     images = ['images/teddy.jpg', 'images/umbrella.png'],
+    #     locations = [ [0.0,0.09,0.33,0.76], [0.55,0.11,1.0,0.8]   ],
+    #     alpha_type = [1.0, 0, 0.0], 
+    #     has_text_mask = 1,  
+    #     has_image_mask = 1,  
+    #     save_folder_name="empty_teddy_umbrella_1_1"
+    # ),
+
+    # dict(
+    #     prompt = "hello kitty and bird hybrid",
+    #     phrases = ['a hello kitty', 'a hello kitty'],
+    #     images = ['images/red_bird.jpg', 'images/red_bird.jpg'],
+    #     locations = [ [0.0,0.09,0.33,0.76], [0.55,0.11,1.0,0.8]   ],
+    #     has_text_mask = 1,  
+    #     has_image_mask = 1,  
+    #     save_folder_name="hello+bird_1_1"
+    # ),
+
+    # dict(
+    #     prompt = "hello kitty and teddy bear hybrid",
+    #     phrases = ['a hello kitty', 'a hello kitty'],
+    #     images = ['images/teddy.jpg', 'images/teddy.jpg'],
+    #     locations = [ [0.0,0.09,0.33,0.76], [0.55,0.11,1.0,0.8]   ],
+    #     has_text_mask = 1,  
+    #     has_image_mask = 1,  
+    #     save_folder_name="hello+teddy_1_1"
+    # ),
+
+    # dict(
+    #     prompt = "bird and hello kitty hybrid",
+    #     phrases = ['a bird', 'a bird'],
+    #     images = ['images/hello.jpg', 'images/hello.jpg'],
+    #     locations = [ [0.0,0.09,0.33,0.76], [0.55,0.11,1.0,0.8]   ],
+    #     alpha_type = [1.0, 0, 0.0], 
+    #     has_text_mask = 1,  
+    #     has_image_mask = 0.5,  
+    #     save_folder_name="bird+hello_1_1"
+    # ),
+
+
+
+    # dict(
+    #     prompt = "a deer standing in front of a brick house in the woods, anime, oil painting, high resolution, cottagecore, ghibli inspired, 4k",
+    #     phrases = ['a deer'],
+    #     images = ['images/sky.jpg'],
+    #     locations = [ [0.0,0.5,0.5,0.9] ],
+    #     alpha_type = [1, 0, 0],  
+    #     has_text_mask = 1,  
+    #     has_image_mask = 1,  
+    #     save_folder_name="deer_sky"
+    # ),
+
+
+    # dict(
+    #     prompt = "A woman sitting in a restaurant with a slice of pizza in front of her",
+    #     phrases = ['dining table', 'pizza', 'person', 'wall', 'car', 'paper', 'chair', 'window', 'bottle', 'cup'],
+    #     images = ['images/hello.jpg','images/hello.jpg','images/hello.jpg','images/hello.jpg','images/hello.jpg','images/hello.jpg','images/hello.jpg','images/hello.jpg','images/hello.jpg','images/hello.jpg'],
+    #     locations = [   [0.0030, 0.3589, 1.0000, 1.0000],
+    #                     [0.0779, 0.6744, 0.9768, 1.0000],
+    #                     [0.2236, 0.0000, 0.7809, 0.4352],
+    #                     [0.0000, 0.0000, 0.4313, 0.4505],
+    #                     [0.6275, 0.1050, 0.9444, 0.2497],
+    #                     [0.0000, 0.3859, 0.1250, 0.6922],
+    #                     [0.7137, 0.2389, 0.8540, 0.4549],
+    #                     [0.0000, 0.0000, 0.4667, 0.0630],
+    #                     [0.3822, 0.4235, 0.4932, 0.6575],
+    #                     [0.6616, 0.3617, 0.7880, 0.5165]  ],
+    #     alpha_type = [0.0, 0, 1.0],  
+    #     has_text_mask = 1,  
+    #     has_image_mask = 0,  
+    #     save_folder_name="pizza_1_0"
+    # ),
+
+
+
+
+]

gligen/distributed.py

@@ -0,0 +1,122 @@
+import math
+import pickle
+
+import torch
+from torch import distributed as dist
+from torch.utils.data.sampler import Sampler
+
+
+def get_rank():
+    if not dist.is_available():
+        return 0
+
+    if not dist.is_initialized():
+        return 0
+
+    return dist.get_rank()
+
+
+def synchronize():
+    if not dist.is_available():
+        return
+    if not dist.is_initialized():
+        return
+
+    world_size = dist.get_world_size()
+    if world_size == 1:
+        return
+
+    dist.barrier()
+
+
+def get_world_size():
+    if not dist.is_available():
+        return 1
+    if not dist.is_initialized():
+        return 1
+    return dist.get_world_size()
+
+
+def reduce_sum(tensor):
+    if not dist.is_available():
+        return tensor
+
+    if not dist.is_initialized():
+        return tensor
+
+    tensor = tensor.clone()
+    dist.all_reduce(tensor, op=dist.ReduceOp.SUM)
+
+    return tensor
+
+
+def gather_grad(params):
+    world_size = get_world_size()
+    
+    if world_size == 1:
+        return
+
+    for param in params:
+        if param.grad is not None:
+            dist.all_reduce(param.grad.data, op=dist.ReduceOp.SUM)
+            param.grad.data.div_(world_size)
+
+
+def all_gather(data):
+    world_size = get_world_size()
+
+    if world_size == 1:
+        return [data]
+
+    buffer = pickle.dumps(data)
+    storage = torch.ByteStorage.from_buffer(buffer)
+    tensor = torch.ByteTensor(storage).to('cuda')
+
+    local_size = torch.IntTensor([tensor.numel()]).to('cuda')
+    size_list = [torch.IntTensor([0]).to('cuda') for _ in range(world_size)]
+    dist.all_gather(size_list, local_size)
+    size_list = [int(size.item()) for size in size_list]
+    max_size = max(size_list)
+
+    tensor_list = []
+    for _ in size_list:
+        tensor_list.append(torch.ByteTensor(size=(max_size,)).to('cuda'))
+
+    if local_size != max_size:
+        padding = torch.ByteTensor(size=(max_size - local_size,)).to('cuda')
+        tensor = torch.cat((tensor, padding), 0)
+
+    dist.all_gather(tensor_list, tensor)
+
+    data_list = []
+
+    for size, tensor in zip(size_list, tensor_list):
+        buffer = tensor.cpu().numpy().tobytes()[:size]
+        data_list.append(pickle.loads(buffer))
+
+    return data_list
+
+
+def reduce_loss_dict(loss_dict):
+    world_size = get_world_size()
+
+    if world_size < 2:
+        return loss_dict
+
+    with torch.no_grad():
+        keys = []
+        losses = []
+
+        for k in sorted(loss_dict.keys()):
+            keys.append(k)
+            losses.append(loss_dict[k])
+
+        losses = torch.stack(losses, 0)
+        dist.reduce(losses, dst=0)
+
+        if dist.get_rank() == 0:
+            losses /= world_size
+
+        reduced_losses = {k: v for k, v in zip(keys, losses)}
+
+    return reduced_losses

gligen/evaluator.py

@@ -0,0 +1,225 @@
+import torch
+from ldm.models.diffusion.ddim import DDIMSampler
+from ldm.models.diffusion.plms import PLMSSampler
+from ldm.util import instantiate_from_config
+import numpy as np
+import random
+from dataset.concat_dataset import ConCatDataset #, collate_fn
+from torch.utils.data import DataLoader
+from torch.utils.data.distributed import  DistributedSampler
+import os 
+from tqdm import tqdm
+from distributed import get_rank, synchronize, get_world_size
+from trainer import read_official_ckpt, batch_to_device, ImageCaptionSaver, wrap_loader #, get_padded_boxes
+from PIL import Image
+import math
+import json
+
+
+def draw_masks_from_boxes(boxes,size):
+
+    image_masks = [] 
+    for box in boxes:
+        image_mask = torch.ones(size[0],size[1])
+        for bx in box:
+            x0, x1 = bx[0]*size[0], bx[2]*size[0]
+            y0, y1 = bx[1]*size[1], bx[3]*size[1]
+            image_mask[int(y0):int(y1), int(x0):int(x1)] = 0 
+        image_masks.append(image_mask)
+    return torch.stack(image_masks).unsqueeze(1)
+        
+
+
+def set_alpha_scale(model, alpha_scale):
+    from ldm.modules.attention import GatedCrossAttentionDense, GatedSelfAttentionDense
+    for module in model.modules():
+        if type(module) == GatedCrossAttentionDense or type(module) == GatedSelfAttentionDense:
+            module.scale = alpha_scale
+            # print("scale:   ", alpha_scale)
+            # print("attn:  ", module.alpha_attn)
+            # print("dense:   ", module.alpha_dense)
+            # print('  ')
+            # print('  ')
+
+
+def save_images(samples, image_ids, folder, to256):
+    for sample, image_id in zip(samples, image_ids):
+        sample = torch.clamp(sample, min=-1, max=1) * 0.5 + 0.5
+        sample = sample.cpu().numpy().transpose(1,2,0) * 255 
+        img_name = str(int(image_id))+'.png'
+        img = Image.fromarray(sample.astype(np.uint8))
+        if to256:
+            img = img.resize( (256,256), Image.BICUBIC)
+        img.save(os.path.join(folder,img_name))
+
+
+def ckpt_to_folder_name(basename):
+    name=""
+    for s in basename:
+        if s.isdigit():
+            name+=s
+    seen = round( int(name)/1000, 1 )
+    return str(seen).ljust(4,'0')+'k'
+
+
+class Evaluator:
+    def __init__(self, config):
+
+        self.config = config
+        self.device = torch.device("cuda")
+     
+
+        # = = = = = create model and diffusion = = = = = #
+        if self.config.ckpt != "real":
+
+            self.model = instantiate_from_config(config.model).to(self.device)
+            self.autoencoder = instantiate_from_config(config.autoencoder).to(self.device)
+            self.text_encoder = instantiate_from_config(config.text_encoder).to(self.device)
+            self.diffusion = instantiate_from_config(config.diffusion).to(self.device)
+
+            # donot need to load official_ckpt for self.model here, since we will load from our ckpt
+            state_dict = read_official_ckpt( os.path.join(config.DATA_ROOT, config.official_ckpt_name)  )
+            self.autoencoder.load_state_dict( state_dict["autoencoder"]  )
+            self.text_encoder.load_state_dict( state_dict["text_encoder"]  )
+            self.diffusion.load_state_dict( state_dict["diffusion"]  )
+
+
+        # = = = = = load from our ckpt = = = = = #
+        if self.config.ckpt == "real":
+            print("Saving all real images...")
+            self.just_save_real = True 
+        else:
+            checkpoint = torch.load(self.config.ckpt, map_location="cpu")
+            which_state = 'ema' if 'ema' in checkpoint else "model"
+            which_state = which_state if config.which_state is None else config.which_state
+            self.model.load_state_dict(checkpoint[which_state])
+            print("ckpt is loaded")
+            self.just_save_real = False
+            set_alpha_scale(self.model, self.config.alpha_scale)
+
+            self.autoencoder.eval()
+            self.model.eval()
+            self.text_encoder.eval()
+        
+
+        # = = = = = create data = = = = = #
+        self.dataset_eval = ConCatDataset(config.val_dataset_names, config.DATA_ROOT, config.which_embedder, train=False)
+        print("total eval images: ", len(self.dataset_eval))
+        sampler = DistributedSampler(self.dataset_eval,shuffle=False) if config.distributed else None
+        loader_eval = DataLoader( self.dataset_eval,batch_size=config.batch_size, 
+                                                    num_workers=config.workers, 
+                                                    pin_memory=True, 
+                                                    sampler=sampler,
+                                                    drop_last=False) # shuffle default is False
+        self.loader_eval = loader_eval
+        
+
+        # = = = = = create output folder = = = = = #
+        folder_name = ckpt_to_folder_name(os.path.basename(config.ckpt))
+        self.outdir = os.path.join(config.OUTPUT_ROOT, folder_name)
+        self.outdir_real = os.path.join(self.outdir,'real')
+        self.outdir_fake = os.path.join(self.outdir,'fake')
+        if config.to256:
+            self.outdir_real256 = os.path.join(self.outdir,'real256')
+            self.outdir_fake256 = os.path.join(self.outdir,'fake256')
+        synchronize() # if rank0 is faster, it may mkdir before the other rank call os.listdir()
+        if get_rank() == 0:
+            os.makedirs(self.outdir, exist_ok=True)
+            os.makedirs(self.outdir_real, exist_ok=True)
+            os.makedirs(self.outdir_fake, exist_ok=True)
+            if config.to256:
+                os.makedirs(self.outdir_real256, exist_ok=True)
+                os.makedirs(self.outdir_fake256, exist_ok=True)
+        print(self.outdir) # double check 
+
+        self.evaluation_finished = False
+        if os.path.exists(  os.path.join(self.outdir,'score.txt')  ):
+            self.evaluation_finished = True 
+            
+
+    def alread_saved_this_batch(self, batch):
+        existing_real_files = os.listdir( self.outdir_real  )
+        existing_fake_files = os.listdir( self.outdir_fake  )
+        status = []
+        for image_id in batch["id"]:
+            img_name = str(int(image_id))+'.png'
+            status.append(img_name in existing_real_files)
+            status.append(img_name in existing_fake_files)
+        return all(status)
+
+
+    @torch.no_grad()
+    def start_evaluating(self):
+
+        iterator = tqdm( self.loader_eval, desc='Evaluating progress')   
+        for batch in iterator:
+
+            #if not self.alread_saved_this_batch(batch):
+            if True:
+
+                batch_to_device(batch, self.device)
+                batch_size = batch["image"].shape[0]
+                samples_real = batch["image"]
+
+                if self.just_save_real:                    
+                    samples_fake = None
+                else:
+                    uc = self.text_encoder.encode( batch_size*[""] )
+                    context = self.text_encoder.encode(  batch["caption"]  )
+                
+                    image_mask = x0 = None 
+                    if self.config.inpaint:
+                        image_mask = draw_masks_from_boxes( batch['boxes'], self.model.image_size  ).cuda()
+                        x0 = self.autoencoder.encode( batch["image"] )
+
+                    shape = (batch_size, self.model.in_channels, self.model.image_size, self.model.image_size)
+                    if self.config.no_plms:
+                        sampler = DDIMSampler(self.diffusion, self.model)
+                        steps = 250 
+                    else:
+                        sampler = PLMSSampler(self.diffusion, self.model)
+                        steps = 50 
+
+                    input = dict( x=None, timesteps=None, context=context, boxes=batch['boxes'], masks=batch['masks'], positive_embeddings=batch["positive_embeddings"] )
+                    samples_fake = sampler.sample(S=steps, shape=shape, input=input,  uc=uc, guidance_scale=self.config.guidance_scale, mask=image_mask, x0=x0)
+                    samples_fake = self.autoencoder.decode(samples_fake)
+
+
+                save_images(samples_real, batch['id'], self.outdir_real, to256=False )
+                if self.config.to256:
+                    save_images(samples_real, batch['id'], self.outdir_real256, to256=True )
+
+                if samples_fake is not None:
+                    save_images(samples_fake, batch['id'], self.outdir_fake, to256=False )
+                    if self.config.to256:
+                        save_images(samples_fake, batch['id'], self.outdir_fake256, to256=True )
+
+
+    def fire_fid(self):
+        paths = [self.outdir_real, self.outdir_fake]
+        if self.config.to256:
+            paths = [self.outdir_real256, self.outdir_fake256]
+        
+
+
+        
+        
+
+
+
+
+    
+
+    
+            
+
+
+
+
+
+
+
+
+
+
+

gligen/ldm/__init__.py

@@ -0,0 +1,3 @@
+import gligen.evaluator as evaluator
+import gligen.trainer as trainer
+import gligen.ldm as ldm

gligen/ldm/data/base.py

@@ -0,0 +1,23 @@
+from abc import abstractmethod
+from torch.utils.data import Dataset, ConcatDataset, ChainDataset, IterableDataset
+
+
+class Txt2ImgIterableBaseDataset(IterableDataset):
+    '''
+    Define an interface to make the IterableDatasets for text2img data chainable
+    '''
+    def __init__(self, num_records=0, valid_ids=None, size=256):
+        super().__init__()
+        self.num_records = num_records
+        self.valid_ids = valid_ids
+        self.sample_ids = valid_ids
+        self.size = size
+
+        print(f'{self.__class__.__name__} dataset contains {self.__len__()} examples.')
+
+    def __len__(self):
+        return self.num_records
+
+    @abstractmethod
+    def __iter__(self):
+        pass

gligen/ldm/data/imagenet.py

@@ -0,0 +1,394 @@
+import os, yaml, pickle, shutil, tarfile, glob
+import cv2
+import albumentations
+import PIL
+import numpy as np
+import torchvision.transforms.functional as TF
+from omegaconf import OmegaConf
+from functools import partial
+from PIL import Image
+from tqdm import tqdm
+from torch.utils.data import Dataset, Subset
+
+import taming.data.utils as tdu
+from taming.data.imagenet import str_to_indices, give_synsets_from_indices, download, retrieve
+from taming.data.imagenet import ImagePaths
+
+from ldm.modules.image_degradation import degradation_fn_bsr, degradation_fn_bsr_light
+
+
+def synset2idx(path_to_yaml="ldm/data/index_synset.yaml"):
+    with open(path_to_yaml) as f:
+        di2s = yaml.load(f)
+    return dict((v,k) for k,v in di2s.items())
+
+
+class ImageNetBase(Dataset):
+    def __init__(self, config=None):
+        self.config = config or OmegaConf.create()
+        if not type(self.config)==dict:
+            self.config = OmegaConf.to_container(self.config)
+        self.keep_orig_class_label = self.config.get("keep_orig_class_label", False)
+        self.process_images = True  # if False we skip loading & processing images and self.data contains filepaths
+        self._prepare()
+        self._prepare_synset_to_human()
+        self._prepare_idx_to_synset()
+        self._prepare_human_to_integer_label()
+        self._load()
+
+    def __len__(self):
+        return len(self.data)
+
+    def __getitem__(self, i):
+        return self.data[i]
+
+    def _prepare(self):
+        raise NotImplementedError()
+
+    def _filter_relpaths(self, relpaths):
+        ignore = set([
+            "n06596364_9591.JPEG",
+        ])
+        relpaths = [rpath for rpath in relpaths if not rpath.split("/")[-1] in ignore]
+        if "sub_indices" in self.config:
+            indices = str_to_indices(self.config["sub_indices"])
+            synsets = give_synsets_from_indices(indices, path_to_yaml=self.idx2syn)  # returns a list of strings
+            self.synset2idx = synset2idx(path_to_yaml=self.idx2syn)
+            files = []
+            for rpath in relpaths:
+                syn = rpath.split("/")[0]
+                if syn in synsets:
+                    files.append(rpath)
+            return files
+        else:
+            return relpaths
+
+    def _prepare_synset_to_human(self):
+        SIZE = 2655750
+        URL = "https://heibox.uni-heidelberg.de/f/9f28e956cd304264bb82/?dl=1"
+        self.human_dict = os.path.join(self.root, "synset_human.txt")
+        if (not os.path.exists(self.human_dict) or
+                not os.path.getsize(self.human_dict)==SIZE):
+            download(URL, self.human_dict)
+
+    def _prepare_idx_to_synset(self):
+        URL = "https://heibox.uni-heidelberg.de/f/d835d5b6ceda4d3aa910/?dl=1"
+        self.idx2syn = os.path.join(self.root, "index_synset.yaml")
+        if (not os.path.exists(self.idx2syn)):
+            download(URL, self.idx2syn)
+
+    def _prepare_human_to_integer_label(self):
+        URL = "https://heibox.uni-heidelberg.de/f/2362b797d5be43b883f6/?dl=1"
+        self.human2integer = os.path.join(self.root, "imagenet1000_clsidx_to_labels.txt")
+        if (not os.path.exists(self.human2integer)):
+            download(URL, self.human2integer)
+        with open(self.human2integer, "r") as f:
+            lines = f.read().splitlines()
+            assert len(lines) == 1000
+            self.human2integer_dict = dict()
+            for line in lines:
+                value, key = line.split(":")
+                self.human2integer_dict[key] = int(value)
+
+    def _load(self):
+        with open(self.txt_filelist, "r") as f:
+            self.relpaths = f.read().splitlines()
+            l1 = len(self.relpaths)
+            self.relpaths = self._filter_relpaths(self.relpaths)
+            print("Removed {} files from filelist during filtering.".format(l1 - len(self.relpaths)))
+
+        self.synsets = [p.split("/")[0] for p in self.relpaths]
+        self.abspaths = [os.path.join(self.datadir, p) for p in self.relpaths]
+
+        unique_synsets = np.unique(self.synsets)
+        class_dict = dict((synset, i) for i, synset in enumerate(unique_synsets))
+        if not self.keep_orig_class_label:
+            self.class_labels = [class_dict[s] for s in self.synsets]
+        else:
+            self.class_labels = [self.synset2idx[s] for s in self.synsets]
+
+        with open(self.human_dict, "r") as f:
+            human_dict = f.read().splitlines()
+            human_dict = dict(line.split(maxsplit=1) for line in human_dict)
+
+        self.human_labels = [human_dict[s] for s in self.synsets]
+
+        labels = {
+            "relpath": np.array(self.relpaths),
+            "synsets": np.array(self.synsets),
+            "class_label": np.array(self.class_labels),
+            "human_label": np.array(self.human_labels),
+        }
+
+        if self.process_images:
+            self.size = retrieve(self.config, "size", default=256)
+            self.data = ImagePaths(self.abspaths,
+                                   labels=labels,
+                                   size=self.size,
+                                   random_crop=self.random_crop,
+                                   )
+        else:
+            self.data = self.abspaths
+
+
+class ImageNetTrain(ImageNetBase):
+    NAME = "ILSVRC2012_train"
+    URL = "http://www.image-net.org/challenges/LSVRC/2012/"
+    AT_HASH = "a306397ccf9c2ead27155983c254227c0fd938e2"
+    FILES = [
+        "ILSVRC2012_img_train.tar",
+    ]
+    SIZES = [
+        147897477120,
+    ]
+
+    def __init__(self, process_images=True, data_root=None, **kwargs):
+        self.process_images = process_images
+        self.data_root = data_root
+        super().__init__(**kwargs)
+
+    def _prepare(self):
+        if self.data_root:
+            self.root = os.path.join(self.data_root, self.NAME)
+        else:
+            cachedir = os.environ.get("XDG_CACHE_HOME", os.path.expanduser("~/.cache"))
+            self.root = os.path.join(cachedir, "autoencoders/data", self.NAME)
+
+        self.datadir = os.path.join(self.root, "data")
+        self.txt_filelist = os.path.join(self.root, "filelist.txt")
+        self.expected_length = 1281167
+        self.random_crop = retrieve(self.config, "ImageNetTrain/random_crop",
+                                    default=True)
+        if not tdu.is_prepared(self.root):
+            # prep
+            print("Preparing dataset {} in {}".format(self.NAME, self.root))
+
+            datadir = self.datadir
+            if not os.path.exists(datadir):
+                path = os.path.join(self.root, self.FILES[0])
+                if not os.path.exists(path) or not os.path.getsize(path)==self.SIZES[0]:
+                    import academictorrents as at
+                    atpath = at.get(self.AT_HASH, datastore=self.root)
+                    assert atpath == path
+
+                print("Extracting {} to {}".format(path, datadir))
+                os.makedirs(datadir, exist_ok=True)
+                with tarfile.open(path, "r:") as tar:
+                    tar.extractall(path=datadir)
+
+                print("Extracting sub-tars.")
+                subpaths = sorted(glob.glob(os.path.join(datadir, "*.tar")))
+                for subpath in tqdm(subpaths):
+                    subdir = subpath[:-len(".tar")]
+                    os.makedirs(subdir, exist_ok=True)
+                    with tarfile.open(subpath, "r:") as tar:
+                        tar.extractall(path=subdir)
+
+            filelist = glob.glob(os.path.join(datadir, "**", "*.JPEG"))
+            filelist = [os.path.relpath(p, start=datadir) for p in filelist]
+            filelist = sorted(filelist)
+            filelist = "\n".join(filelist)+"\n"
+            with open(self.txt_filelist, "w") as f:
+                f.write(filelist)
+
+            tdu.mark_prepared(self.root)
+
+
+class ImageNetValidation(ImageNetBase):
+    NAME = "ILSVRC2012_validation"
+    URL = "http://www.image-net.org/challenges/LSVRC/2012/"
+    AT_HASH = "5d6d0df7ed81efd49ca99ea4737e0ae5e3a5f2e5"
+    VS_URL = "https://heibox.uni-heidelberg.de/f/3e0f6e9c624e45f2bd73/?dl=1"
+    FILES = [
+        "ILSVRC2012_img_val.tar",
+        "validation_synset.txt",
+    ]
+    SIZES = [
+        6744924160,
+        1950000,
+    ]
+
+    def __init__(self, process_images=True, data_root=None, **kwargs):
+        self.data_root = data_root
+        self.process_images = process_images
+        super().__init__(**kwargs)
+
+    def _prepare(self):
+        if self.data_root:
+            self.root = os.path.join(self.data_root, self.NAME)
+        else:
+            cachedir = os.environ.get("XDG_CACHE_HOME", os.path.expanduser("~/.cache"))
+            self.root = os.path.join(cachedir, "autoencoders/data", self.NAME)
+        self.datadir = os.path.join(self.root, "data")
+        self.txt_filelist = os.path.join(self.root, "filelist.txt")
+        self.expected_length = 50000
+        self.random_crop = retrieve(self.config, "ImageNetValidation/random_crop",
+                                    default=False)
+        if not tdu.is_prepared(self.root):
+            # prep
+            print("Preparing dataset {} in {}".format(self.NAME, self.root))
+
+            datadir = self.datadir
+            if not os.path.exists(datadir):
+                path = os.path.join(self.root, self.FILES[0])
+                if not os.path.exists(path) or not os.path.getsize(path)==self.SIZES[0]:
+                    import academictorrents as at
+                    atpath = at.get(self.AT_HASH, datastore=self.root)
+                    assert atpath == path
+
+                print("Extracting {} to {}".format(path, datadir))
+                os.makedirs(datadir, exist_ok=True)
+                with tarfile.open(path, "r:") as tar:
+                    tar.extractall(path=datadir)
+
+                vspath = os.path.join(self.root, self.FILES[1])
+                if not os.path.exists(vspath) or not os.path.getsize(vspath)==self.SIZES[1]:
+                    download(self.VS_URL, vspath)
+
+                with open(vspath, "r") as f:
+                    synset_dict = f.read().splitlines()
+                    synset_dict = dict(line.split() for line in synset_dict)
+
+                print("Reorganizing into synset folders")
+                synsets = np.unique(list(synset_dict.values()))
+                for s in synsets:
+                    os.makedirs(os.path.join(datadir, s), exist_ok=True)
+                for k, v in synset_dict.items():
+                    src = os.path.join(datadir, k)
+                    dst = os.path.join(datadir, v)
+                    shutil.move(src, dst)
+
+            filelist = glob.glob(os.path.join(datadir, "**", "*.JPEG"))
+            filelist = [os.path.relpath(p, start=datadir) for p in filelist]
+            filelist = sorted(filelist)
+            filelist = "\n".join(filelist)+"\n"
+            with open(self.txt_filelist, "w") as f:
+                f.write(filelist)
+
+            tdu.mark_prepared(self.root)
+
+
+
+class ImageNetSR(Dataset):
+    def __init__(self, size=None,
+                 degradation=None, downscale_f=4, min_crop_f=0.5, max_crop_f=1.,
+                 random_crop=True):
+        """
+        Imagenet Superresolution Dataloader
+        Performs following ops in order:
+        1.  crops a crop of size s from image either as random or center crop
+        2.  resizes crop to size with cv2.area_interpolation
+        3.  degrades resized crop with degradation_fn
+
+        :param size: resizing to size after cropping
+        :param degradation: degradation_fn, e.g. cv_bicubic or bsrgan_light
+        :param downscale_f: Low Resolution Downsample factor
+        :param min_crop_f: determines crop size s,
+          where s = c * min_img_side_len with c sampled from interval (min_crop_f, max_crop_f)
+        :param max_crop_f: ""
+        :param data_root:
+        :param random_crop:
+        """
+        self.base = self.get_base()
+        assert size
+        assert (size / downscale_f).is_integer()
+        self.size = size
+        self.LR_size = int(size / downscale_f)
+        self.min_crop_f = min_crop_f
+        self.max_crop_f = max_crop_f
+        assert(max_crop_f <= 1.)
+        self.center_crop = not random_crop
+
+        self.image_rescaler = albumentations.SmallestMaxSize(max_size=size, interpolation=cv2.INTER_AREA)
+
+        self.pil_interpolation = False # gets reset later if incase interp_op is from pillow
+
+        if degradation == "bsrgan":
+            self.degradation_process = partial(degradation_fn_bsr, sf=downscale_f)
+
+        elif degradation == "bsrgan_light":
+            self.degradation_process = partial(degradation_fn_bsr_light, sf=downscale_f)
+
+        else:
+            interpolation_fn = {
+            "cv_nearest": cv2.INTER_NEAREST,
+            "cv_bilinear": cv2.INTER_LINEAR,
+            "cv_bicubic": cv2.INTER_CUBIC,
+            "cv_area": cv2.INTER_AREA,
+            "cv_lanczos": cv2.INTER_LANCZOS4,
+            "pil_nearest": PIL.Image.NEAREST,
+            "pil_bilinear": PIL.Image.BILINEAR,
+            "pil_bicubic": PIL.Image.BICUBIC,
+            "pil_box": PIL.Image.BOX,
+            "pil_hamming": PIL.Image.HAMMING,
+            "pil_lanczos": PIL.Image.LANCZOS,
+            }[degradation]
+
+            self.pil_interpolation = degradation.startswith("pil_")
+
+            if self.pil_interpolation:
+                self.degradation_process = partial(TF.resize, size=self.LR_size, interpolation=interpolation_fn)
+
+            else:
+                self.degradation_process = albumentations.SmallestMaxSize(max_size=self.LR_size,
+                                                                          interpolation=interpolation_fn)
+
+    def __len__(self):
+        return len(self.base)
+
+    def __getitem__(self, i):
+        example = self.base[i]
+        image = Image.open(example["file_path_"])
+
+        if not image.mode == "RGB":
+            image = image.convert("RGB")
+
+        image = np.array(image).astype(np.uint8)
+
+        min_side_len = min(image.shape[:2])
+        crop_side_len = min_side_len * np.random.uniform(self.min_crop_f, self.max_crop_f, size=None)
+        crop_side_len = int(crop_side_len)
+
+        if self.center_crop:
+            self.cropper = albumentations.CenterCrop(height=crop_side_len, width=crop_side_len)
+
+        else:
+            self.cropper = albumentations.RandomCrop(height=crop_side_len, width=crop_side_len)
+
+        image = self.cropper(image=image)["image"]
+        image = self.image_rescaler(image=image)["image"]
+
+        if self.pil_interpolation:
+            image_pil = PIL.Image.fromarray(image)
+            LR_image = self.degradation_process(image_pil)
+            LR_image = np.array(LR_image).astype(np.uint8)
+
+        else:
+            LR_image = self.degradation_process(image=image)["image"]
+
+        example["image"] = (image/127.5 - 1.0).astype(np.float32)
+        example["LR_image"] = (LR_image/127.5 - 1.0).astype(np.float32)
+
+        return example
+
+
+class ImageNetSRTrain(ImageNetSR):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    def get_base(self):
+        with open("ldm/data/imagenet_train_hr_indices.p", "rb") as f:
+            indices = pickle.load(f)
+        dset = ImageNetTrain(process_images=False,)
+        return Subset(dset, indices)
+
+
+class ImageNetSRValidation(ImageNetSR):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    def get_base(self):
+        with open("ldm/data/imagenet_val_hr_indices.p", "rb") as f:
+            indices = pickle.load(f)
+        dset = ImageNetValidation(process_images=False,)
+        return Subset(dset, indices)

gligen/ldm/data/imagenet_clsidx_to_label.txt

@@ -0,0 +1,1000 @@
+ 0: 'tench, Tinca tinca',
+ 1: 'goldfish, Carassius auratus',
+ 2: 'great white shark, white shark, man-eater, man-eating shark, Carcharodon carcharias',
+ 3: 'tiger shark, Galeocerdo cuvieri',
+ 4: 'hammerhead, hammerhead shark',
+ 5: 'electric ray, crampfish, numbfish, torpedo',
+ 6: 'stingray',
+ 7: 'cock',
+ 8: 'hen',
+ 9: 'ostrich, Struthio camelus',
+ 10: 'brambling, Fringilla montifringilla',
+ 11: 'goldfinch, Carduelis carduelis',
+ 12: 'house finch, linnet, Carpodacus mexicanus',
+ 13: 'junco, snowbird',
+ 14: 'indigo bunting, indigo finch, indigo bird, Passerina cyanea',
+ 15: 'robin, American robin, Turdus migratorius',
+ 16: 'bulbul',
+ 17: 'jay',
+ 18: 'magpie',
+ 19: 'chickadee',
+ 20: 'water ouzel, dipper',
+ 21: 'kite',
+ 22: 'bald eagle, American eagle, Haliaeetus leucocephalus',
+ 23: 'vulture',
+ 24: 'great grey owl, great gray owl, Strix nebulosa',
+ 25: 'European fire salamander, Salamandra salamandra',
+ 26: 'common newt, Triturus vulgaris',
+ 27: 'eft',
+ 28: 'spotted salamander, Ambystoma maculatum',
+ 29: 'axolotl, mud puppy, Ambystoma mexicanum',
+ 30: 'bullfrog, Rana catesbeiana',
+ 31: 'tree frog, tree-frog',
+ 32: 'tailed frog, bell toad, ribbed toad, tailed toad, Ascaphus trui',
+ 33: 'loggerhead, loggerhead turtle, Caretta caretta',
+ 34: 'leatherback turtle, leatherback, leathery turtle, Dermochelys coriacea',
+ 35: 'mud turtle',
+ 36: 'terrapin',
+ 37: 'box turtle, box tortoise',
+ 38: 'banded gecko',
+ 39: 'common iguana, iguana, Iguana iguana',
+ 40: 'American chameleon, anole, Anolis carolinensis',
+ 41: 'whiptail, whiptail lizard',
+ 42: 'agama',
+ 43: 'frilled lizard, Chlamydosaurus kingi',
+ 44: 'alligator lizard',
+ 45: 'Gila monster, Heloderma suspectum',
+ 46: 'green lizard, Lacerta viridis',
+ 47: 'African chameleon, Chamaeleo chamaeleon',
+ 48: 'Komodo dragon, Komodo lizard, dragon lizard, giant lizard, Varanus komodoensis',
+ 49: 'African crocodile, Nile crocodile, Crocodylus niloticus',
+ 50: 'American alligator, Alligator mississipiensis',
+ 51: 'triceratops',
+ 52: 'thunder snake, worm snake, Carphophis amoenus',
+ 53: 'ringneck snake, ring-necked snake, ring snake',
+ 54: 'hognose snake, puff adder, sand viper',
+ 55: 'green snake, grass snake',
+ 56: 'king snake, kingsnake',
+ 57: 'garter snake, grass snake',
+ 58: 'water snake',
+ 59: 'vine snake',
+ 60: 'night snake, Hypsiglena torquata',
+ 61: 'boa constrictor, Constrictor constrictor',
+ 62: 'rock python, rock snake, Python sebae',
+ 63: 'Indian cobra, Naja naja',
+ 64: 'green mamba',
+ 65: 'sea snake',
+ 66: 'horned viper, cerastes, sand viper, horned asp, Cerastes cornutus',
+ 67: 'diamondback, diamondback rattlesnake, Crotalus adamanteus',
+ 68: 'sidewinder, horned rattlesnake, Crotalus cerastes',
+ 69: 'trilobite',
+ 70: 'harvestman, daddy longlegs, Phalangium opilio',
+ 71: 'scorpion',
+ 72: 'black and gold garden spider, Argiope aurantia',
+ 73: 'barn spider, Araneus cavaticus',
+ 74: 'garden spider, Aranea diademata',
+ 75: 'black widow, Latrodectus mactans',
+ 76: 'tarantula',
+ 77: 'wolf spider, hunting spider',
+ 78: 'tick',
+ 79: 'centipede',
+ 80: 'black grouse',
+ 81: 'ptarmigan',
+ 82: 'ruffed grouse, partridge, Bonasa umbellus',
+ 83: 'prairie chicken, prairie grouse, prairie fowl',
+ 84: 'peacock',
+ 85: 'quail',
+ 86: 'partridge',
+ 87: 'African grey, African gray, Psittacus erithacus',
+ 88: 'macaw',
+ 89: 'sulphur-crested cockatoo, Kakatoe galerita, Cacatua galerita',
+ 90: 'lorikeet',
+ 91: 'coucal',
+ 92: 'bee eater',
+ 93: 'hornbill',
+ 94: 'hummingbird',
+ 95: 'jacamar',
+ 96: 'toucan',
+ 97: 'drake',
+ 98: 'red-breasted merganser, Mergus serrator',
+ 99: 'goose',
+ 100: 'black swan, Cygnus atratus',
+ 101: 'tusker',
+ 102: 'echidna, spiny anteater, anteater',
+ 103: 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus',
+ 104: 'wallaby, brush kangaroo',
+ 105: 'koala, koala bear, kangaroo bear, native bear, Phascolarctos cinereus',
+ 106: 'wombat',
+ 107: 'jellyfish',
+ 108: 'sea anemone, anemone',
+ 109: 'brain coral',
+ 110: 'flatworm, platyhelminth',
+ 111: 'nematode, nematode worm, roundworm',
+ 112: 'conch',
+ 113: 'snail',
+ 114: 'slug',
+ 115: 'sea slug, nudibranch',
+ 116: 'chiton, coat-of-mail shell, sea cradle, polyplacophore',
+ 117: 'chambered nautilus, pearly nautilus, nautilus',
+ 118: 'Dungeness crab, Cancer magister',
+ 119: 'rock crab, Cancer irroratus',
+ 120: 'fiddler crab',
+ 121: 'king crab, Alaska crab, Alaskan king crab, Alaska king crab, Paralithodes camtschatica',
+ 122: 'American lobster, Northern lobster, Maine lobster, Homarus americanus',
+ 123: 'spiny lobster, langouste, rock lobster, crawfish, crayfish, sea crawfish',
+ 124: 'crayfish, crawfish, crawdad, crawdaddy',
+ 125: 'hermit crab',
+ 126: 'isopod',
+ 127: 'white stork, Ciconia ciconia',
+ 128: 'black stork, Ciconia nigra',
+ 129: 'spoonbill',
+ 130: 'flamingo',
+ 131: 'little blue heron, Egretta caerulea',
+ 132: 'American egret, great white heron, Egretta albus',
+ 133: 'bittern',
+ 134: 'crane',
+ 135: 'limpkin, Aramus pictus',
+ 136: 'European gallinule, Porphyrio porphyrio',
+ 137: 'American coot, marsh hen, mud hen, water hen, Fulica americana',
+ 138: 'bustard',
+ 139: 'ruddy turnstone, Arenaria interpres',
+ 140: 'red-backed sandpiper, dunlin, Erolia alpina',
+ 141: 'redshank, Tringa totanus',
+ 142: 'dowitcher',
+ 143: 'oystercatcher, oyster catcher',
+ 144: 'pelican',
+ 145: 'king penguin, Aptenodytes patagonica',
+ 146: 'albatross, mollymawk',
+ 147: 'grey whale, gray whale, devilfish, Eschrichtius gibbosus, Eschrichtius robustus',
+ 148: 'killer whale, killer, orca, grampus, sea wolf, Orcinus orca',
+ 149: 'dugong, Dugong dugon',
+ 150: 'sea lion',
+ 151: 'Chihuahua',
+ 152: 'Japanese spaniel',
+ 153: 'Maltese dog, Maltese terrier, Maltese',
+ 154: 'Pekinese, Pekingese, Peke',
+ 155: 'Shih-Tzu',
+ 156: 'Blenheim spaniel',
+ 157: 'papillon',
+ 158: 'toy terrier',
+ 159: 'Rhodesian ridgeback',
+ 160: 'Afghan hound, Afghan',
+ 161: 'basset, basset hound',
+ 162: 'beagle',
+ 163: 'bloodhound, sleuthhound',
+ 164: 'bluetick',
+ 165: 'black-and-tan coonhound',
+ 166: 'Walker hound, Walker foxhound',
+ 167: 'English foxhound',
+ 168: 'redbone',
+ 169: 'borzoi, Russian wolfhound',
+ 170: 'Irish wolfhound',
+ 171: 'Italian greyhound',
+ 172: 'whippet',
+ 173: 'Ibizan hound, Ibizan Podenco',
+ 174: 'Norwegian elkhound, elkhound',
+ 175: 'otterhound, otter hound',
+ 176: 'Saluki, gazelle hound',
+ 177: 'Scottish deerhound, deerhound',
+ 178: 'Weimaraner',
+ 179: 'Staffordshire bullterrier, Staffordshire bull terrier',
+ 180: 'American Staffordshire terrier, Staffordshire terrier, American pit bull terrier, pit bull terrier',
+ 181: 'Bedlington terrier',
+ 182: 'Border terrier',
+ 183: 'Kerry blue terrier',
+ 184: 'Irish terrier',
+ 185: 'Norfolk terrier',
+ 186: 'Norwich terrier',
+ 187: 'Yorkshire terrier',
+ 188: 'wire-haired fox terrier',
+ 189: 'Lakeland terrier',
+ 190: 'Sealyham terrier, Sealyham',
+ 191: 'Airedale, Airedale terrier',
+ 192: 'cairn, cairn terrier',
+ 193: 'Australian terrier',
+ 194: 'Dandie Dinmont, Dandie Dinmont terrier',
+ 195: 'Boston bull, Boston terrier',
+ 196: 'miniature schnauzer',
+ 197: 'giant schnauzer',
+ 198: 'standard schnauzer',
+ 199: 'Scotch terrier, Scottish terrier, Scottie',
+ 200: 'Tibetan terrier, chrysanthemum dog',
+ 201: 'silky terrier, Sydney silky',
+ 202: 'soft-coated wheaten terrier',
+ 203: 'West Highland white terrier',
+ 204: 'Lhasa, Lhasa apso',
+ 205: 'flat-coated retriever',
+ 206: 'curly-coated retriever',
+ 207: 'golden retriever',
+ 208: 'Labrador retriever',
+ 209: 'Chesapeake Bay retriever',
+ 210: 'German short-haired pointer',
+ 211: 'vizsla, Hungarian pointer',
+ 212: 'English setter',
+ 213: 'Irish setter, red setter',
+ 214: 'Gordon setter',
+ 215: 'Brittany spaniel',
+ 216: 'clumber, clumber spaniel',
+ 217: 'English springer, English springer spaniel',
+ 218: 'Welsh springer spaniel',
+ 219: 'cocker spaniel, English cocker spaniel, cocker',
+ 220: 'Sussex spaniel',
+ 221: 'Irish water spaniel',
+ 222: 'kuvasz',
+ 223: 'schipperke',
+ 224: 'groenendael',
+ 225: 'malinois',
+ 226: 'briard',
+ 227: 'kelpie',
+ 228: 'komondor',
+ 229: 'Old English sheepdog, bobtail',
+ 230: 'Shetland sheepdog, Shetland sheep dog, Shetland',
+ 231: 'collie',
+ 232: 'Border collie',
+ 233: 'Bouvier des Flandres, Bouviers des Flandres',
+ 234: 'Rottweiler',
+ 235: 'German shepherd, German shepherd dog, German police dog, alsatian',
+ 236: 'Doberman, Doberman pinscher',
+ 237: 'miniature pinscher',
+ 238: 'Greater Swiss Mountain dog',
+ 239: 'Bernese mountain dog',
+ 240: 'Appenzeller',
+ 241: 'EntleBucher',
+ 242: 'boxer',
+ 243: 'bull mastiff',
+ 244: 'Tibetan mastiff',
+ 245: 'French bulldog',
+ 246: 'Great Dane',
+ 247: 'Saint Bernard, St Bernard',
+ 248: 'Eskimo dog, husky',
+ 249: 'malamute, malemute, Alaskan malamute',
+ 250: 'Siberian husky',
+ 251: 'dalmatian, coach dog, carriage dog',
+ 252: 'affenpinscher, monkey pinscher, monkey dog',
+ 253: 'basenji',
+ 254: 'pug, pug-dog',
+ 255: 'Leonberg',
+ 256: 'Newfoundland, Newfoundland dog',
+ 257: 'Great Pyrenees',
+ 258: 'Samoyed, Samoyede',
+ 259: 'Pomeranian',
+ 260: 'chow, chow chow',
+ 261: 'keeshond',
+ 262: 'Brabancon griffon',
+ 263: 'Pembroke, Pembroke Welsh corgi',
+ 264: 'Cardigan, Cardigan Welsh corgi',
+ 265: 'toy poodle',
+ 266: 'miniature poodle',
+ 267: 'standard poodle',
+ 268: 'Mexican hairless',
+ 269: 'timber wolf, grey wolf, gray wolf, Canis lupus',
+ 270: 'white wolf, Arctic wolf, Canis lupus tundrarum',
+ 271: 'red wolf, maned wolf, Canis rufus, Canis niger',
+ 272: 'coyote, prairie wolf, brush wolf, Canis latrans',
+ 273: 'dingo, warrigal, warragal, Canis dingo',
+ 274: 'dhole, Cuon alpinus',
+ 275: 'African hunting dog, hyena dog, Cape hunting dog, Lycaon pictus',
+ 276: 'hyena, hyaena',
+ 277: 'red fox, Vulpes vulpes',
+ 278: 'kit fox, Vulpes macrotis',
+ 279: 'Arctic fox, white fox, Alopex lagopus',
+ 280: 'grey fox, gray fox, Urocyon cinereoargenteus',
+ 281: 'tabby, tabby cat',
+ 282: 'tiger cat',
+ 283: 'Persian cat',
+ 284: 'Siamese cat, Siamese',
+ 285: 'Egyptian cat',
+ 286: 'cougar, puma, catamount, mountain lion, painter, panther, Felis concolor',
+ 287: 'lynx, catamount',
+ 288: 'leopard, Panthera pardus',
+ 289: 'snow leopard, ounce, Panthera uncia',
+ 290: 'jaguar, panther, Panthera onca, Felis onca',
+ 291: 'lion, king of beasts, Panthera leo',
+ 292: 'tiger, Panthera tigris',
+ 293: 'cheetah, chetah, Acinonyx jubatus',
+ 294: 'brown bear, bruin, Ursus arctos',
+ 295: 'American black bear, black bear, Ursus americanus, Euarctos americanus',
+ 296: 'ice bear, polar bear, Ursus Maritimus, Thalarctos maritimus',
+ 297: 'sloth bear, Melursus ursinus, Ursus ursinus',
+ 298: 'mongoose',
+ 299: 'meerkat, mierkat',
+ 300: 'tiger beetle',
+ 301: 'ladybug, ladybeetle, lady beetle, ladybird, ladybird beetle',
+ 302: 'ground beetle, carabid beetle',
+ 303: 'long-horned beetle, longicorn, longicorn beetle',
+ 304: 'leaf beetle, chrysomelid',
+ 305: 'dung beetle',
+ 306: 'rhinoceros beetle',
+ 307: 'weevil',
+ 308: 'fly',
+ 309: 'bee',
+ 310: 'ant, emmet, pismire',
+ 311: 'grasshopper, hopper',
+ 312: 'cricket',
+ 313: 'walking stick, walkingstick, stick insect',
+ 314: 'cockroach, roach',
+ 315: 'mantis, mantid',
+ 316: 'cicada, cicala',
+ 317: 'leafhopper',
+ 318: 'lacewing, lacewing fly',
+ 319: "dragonfly, darning needle, devil's darning needle, sewing needle, snake feeder, snake doctor, mosquito hawk, skeeter hawk",
+ 320: 'damselfly',
+ 321: 'admiral',
+ 322: 'ringlet, ringlet butterfly',
+ 323: 'monarch, monarch butterfly, milkweed butterfly, Danaus plexippus',
+ 324: 'cabbage butterfly',
+ 325: 'sulphur butterfly, sulfur butterfly',
+ 326: 'lycaenid, lycaenid butterfly',
+ 327: 'starfish, sea star',
+ 328: 'sea urchin',
+ 329: 'sea cucumber, holothurian',
+ 330: 'wood rabbit, cottontail, cottontail rabbit',
+ 331: 'hare',
+ 332: 'Angora, Angora rabbit',
+ 333: 'hamster',
+ 334: 'porcupine, hedgehog',
+ 335: 'fox squirrel, eastern fox squirrel, Sciurus niger',
+ 336: 'marmot',
+ 337: 'beaver',
+ 338: 'guinea pig, Cavia cobaya',
+ 339: 'sorrel',
+ 340: 'zebra',
+ 341: 'hog, pig, grunter, squealer, Sus scrofa',
+ 342: 'wild boar, boar, Sus scrofa',
+ 343: 'warthog',
+ 344: 'hippopotamus, hippo, river horse, Hippopotamus amphibius',
+ 345: 'ox',
+ 346: 'water buffalo, water ox, Asiatic buffalo, Bubalus bubalis',
+ 347: 'bison',
+ 348: 'ram, tup',
+ 349: 'bighorn, bighorn sheep, cimarron, Rocky Mountain bighorn, Rocky Mountain sheep, Ovis canadensis',
+ 350: 'ibex, Capra ibex',
+ 351: 'hartebeest',
+ 352: 'impala, Aepyceros melampus',
+ 353: 'gazelle',
+ 354: 'Arabian camel, dromedary, Camelus dromedarius',
+ 355: 'llama',
+ 356: 'weasel',
+ 357: 'mink',
+ 358: 'polecat, fitch, foulmart, foumart, Mustela putorius',
+ 359: 'black-footed ferret, ferret, Mustela nigripes',
+ 360: 'otter',
+ 361: 'skunk, polecat, wood pussy',
+ 362: 'badger',
+ 363: 'armadillo',
+ 364: 'three-toed sloth, ai, Bradypus tridactylus',
+ 365: 'orangutan, orang, orangutang, Pongo pygmaeus',
+ 366: 'gorilla, Gorilla gorilla',
+ 367: 'chimpanzee, chimp, Pan troglodytes',
+ 368: 'gibbon, Hylobates lar',
+ 369: 'siamang, Hylobates syndactylus, Symphalangus syndactylus',
+ 370: 'guenon, guenon monkey',
+ 371: 'patas, hussar monkey, Erythrocebus patas',
+ 372: 'baboon',
+ 373: 'macaque',
+ 374: 'langur',
+ 375: 'colobus, colobus monkey',
+ 376: 'proboscis monkey, Nasalis larvatus',
+ 377: 'marmoset',
+ 378: 'capuchin, ringtail, Cebus capucinus',
+ 379: 'howler monkey, howler',
+ 380: 'titi, titi monkey',
+ 381: 'spider monkey, Ateles geoffroyi',
+ 382: 'squirrel monkey, Saimiri sciureus',
+ 383: 'Madagascar cat, ring-tailed lemur, Lemur catta',
+ 384: 'indri, indris, Indri indri, Indri brevicaudatus',
+ 385: 'Indian elephant, Elephas maximus',
+ 386: 'African elephant, Loxodonta africana',
+ 387: 'lesser panda, red panda, panda, bear cat, cat bear, Ailurus fulgens',
+ 388: 'giant panda, panda, panda bear, coon bear, Ailuropoda melanoleuca',
+ 389: 'barracouta, snoek',
+ 390: 'eel',
+ 391: 'coho, cohoe, coho salmon, blue jack, silver salmon, Oncorhynchus kisutch',
+ 392: 'rock beauty, Holocanthus tricolor',
+ 393: 'anemone fish',
+ 394: 'sturgeon',
+ 395: 'gar, garfish, garpike, billfish, Lepisosteus osseus',
+ 396: 'lionfish',
+ 397: 'puffer, pufferfish, blowfish, globefish',
+ 398: 'abacus',
+ 399: 'abaya',
+ 400: "academic gown, academic robe, judge's robe",
+ 401: 'accordion, piano accordion, squeeze box',
+ 402: 'acoustic guitar',
+ 403: 'aircraft carrier, carrier, flattop, attack aircraft carrier',
+ 404: 'airliner',
+ 405: 'airship, dirigible',
+ 406: 'altar',
+ 407: 'ambulance',
+ 408: 'amphibian, amphibious vehicle',
+ 409: 'analog clock',
+ 410: 'apiary, bee house',
+ 411: 'apron',
+ 412: 'ashcan, trash can, garbage can, wastebin, ash bin, ash-bin, ashbin, dustbin, trash barrel, trash bin',
+ 413: 'assault rifle, assault gun',
+ 414: 'backpack, back pack, knapsack, packsack, rucksack, haversack',
+ 415: 'bakery, bakeshop, bakehouse',
+ 416: 'balance beam, beam',
+ 417: 'balloon',
+ 418: 'ballpoint, ballpoint pen, ballpen, Biro',
+ 419: 'Band Aid',
+ 420: 'banjo',
+ 421: 'bannister, banister, balustrade, balusters, handrail',
+ 422: 'barbell',
+ 423: 'barber chair',
+ 424: 'barbershop',
+ 425: 'barn',
+ 426: 'barometer',
+ 427: 'barrel, cask',
+ 428: 'barrow, garden cart, lawn cart, wheelbarrow',
+ 429: 'baseball',
+ 430: 'basketball',
+ 431: 'bassinet',
+ 432: 'bassoon',
+ 433: 'bathing cap, swimming cap',
+ 434: 'bath towel',
+ 435: 'bathtub, bathing tub, bath, tub',
+ 436: 'beach wagon, station wagon, wagon, estate car, beach waggon, station waggon, waggon',
+ 437: 'beacon, lighthouse, beacon light, pharos',
+ 438: 'beaker',
+ 439: 'bearskin, busby, shako',
+ 440: 'beer bottle',
+ 441: 'beer glass',
+ 442: 'bell cote, bell cot',
+ 443: 'bib',
+ 444: 'bicycle-built-for-two, tandem bicycle, tandem',
+ 445: 'bikini, two-piece',
+ 446: 'binder, ring-binder',
+ 447: 'binoculars, field glasses, opera glasses',
+ 448: 'birdhouse',
+ 449: 'boathouse',
+ 450: 'bobsled, bobsleigh, bob',
+ 451: 'bolo tie, bolo, bola tie, bola',
+ 452: 'bonnet, poke bonnet',
+ 453: 'bookcase',
+ 454: 'bookshop, bookstore, bookstall',
+ 455: 'bottlecap',
+ 456: 'bow',
+ 457: 'bow tie, bow-tie, bowtie',
+ 458: 'brass, memorial tablet, plaque',
+ 459: 'brassiere, bra, bandeau',
+ 460: 'breakwater, groin, groyne, mole, bulwark, seawall, jetty',
+ 461: 'breastplate, aegis, egis',
+ 462: 'broom',
+ 463: 'bucket, pail',
+ 464: 'buckle',
+ 465: 'bulletproof vest',
+ 466: 'bullet train, bullet',
+ 467: 'butcher shop, meat market',
+ 468: 'cab, hack, taxi, taxicab',
+ 469: 'caldron, cauldron',
+ 470: 'candle, taper, wax light',
+ 471: 'cannon',
+ 472: 'canoe',
+ 473: 'can opener, tin opener',
+ 474: 'cardigan',
+ 475: 'car mirror',
+ 476: 'carousel, carrousel, merry-go-round, roundabout, whirligig',
+ 477: "carpenter's kit, tool kit",
+ 478: 'carton',
+ 479: 'car wheel',
+ 480: 'cash machine, cash dispenser, automated teller machine, automatic teller machine, automated teller, automatic teller, ATM',
+ 481: 'cassette',
+ 482: 'cassette player',
+ 483: 'castle',
+ 484: 'catamaran',
+ 485: 'CD player',
+ 486: 'cello, violoncello',
+ 487: 'cellular telephone, cellular phone, cellphone, cell, mobile phone',
+ 488: 'chain',
+ 489: 'chainlink fence',
+ 490: 'chain mail, ring mail, mail, chain armor, chain armour, ring armor, ring armour',
+ 491: 'chain saw, chainsaw',
+ 492: 'chest',
+ 493: 'chiffonier, commode',
+ 494: 'chime, bell, gong',
+ 495: 'china cabinet, china closet',
+ 496: 'Christmas stocking',
+ 497: 'church, church building',
+ 498: 'cinema, movie theater, movie theatre, movie house, picture palace',
+ 499: 'cleaver, meat cleaver, chopper',
+ 500: 'cliff dwelling',
+ 501: 'cloak',
+ 502: 'clog, geta, patten, sabot',
+ 503: 'cocktail shaker',
+ 504: 'coffee mug',
+ 505: 'coffeepot',
+ 506: 'coil, spiral, volute, whorl, helix',
+ 507: 'combination lock',
+ 508: 'computer keyboard, keypad',
+ 509: 'confectionery, confectionary, candy store',
+ 510: 'container ship, containership, container vessel',
+ 511: 'convertible',
+ 512: 'corkscrew, bottle screw',
+ 513: 'cornet, horn, trumpet, trump',
+ 514: 'cowboy boot',
+ 515: 'cowboy hat, ten-gallon hat',
+ 516: 'cradle',
+ 517: 'crane',
+ 518: 'crash helmet',
+ 519: 'crate',
+ 520: 'crib, cot',
+ 521: 'Crock Pot',
+ 522: 'croquet ball',
+ 523: 'crutch',
+ 524: 'cuirass',
+ 525: 'dam, dike, dyke',
+ 526: 'desk',
+ 527: 'desktop computer',
+ 528: 'dial telephone, dial phone',
+ 529: 'diaper, nappy, napkin',
+ 530: 'digital clock',
+ 531: 'digital watch',
+ 532: 'dining table, board',
+ 533: 'dishrag, dishcloth',
+ 534: 'dishwasher, dish washer, dishwashing machine',
+ 535: 'disk brake, disc brake',
+ 536: 'dock, dockage, docking facility',
+ 537: 'dogsled, dog sled, dog sleigh',
+ 538: 'dome',
+ 539: 'doormat, welcome mat',
+ 540: 'drilling platform, offshore rig',
+ 541: 'drum, membranophone, tympan',
+ 542: 'drumstick',
+ 543: 'dumbbell',
+ 544: 'Dutch oven',
+ 545: 'electric fan, blower',
+ 546: 'electric guitar',
+ 547: 'electric locomotive',
+ 548: 'entertainment center',
+ 549: 'envelope',
+ 550: 'espresso maker',
+ 551: 'face powder',
+ 552: 'feather boa, boa',
+ 553: 'file, file cabinet, filing cabinet',
+ 554: 'fireboat',
+ 555: 'fire engine, fire truck',
+ 556: 'fire screen, fireguard',
+ 557: 'flagpole, flagstaff',
+ 558: 'flute, transverse flute',
+ 559: 'folding chair',
+ 560: 'football helmet',
+ 561: 'forklift',
+ 562: 'fountain',
+ 563: 'fountain pen',
+ 564: 'four-poster',
+ 565: 'freight car',
+ 566: 'French horn, horn',
+ 567: 'frying pan, frypan, skillet',
+ 568: 'fur coat',
+ 569: 'garbage truck, dustcart',
+ 570: 'gasmask, respirator, gas helmet',
+ 571: 'gas pump, gasoline pump, petrol pump, island dispenser',
+ 572: 'goblet',
+ 573: 'go-kart',
+ 574: 'golf ball',
+ 575: 'golfcart, golf cart',
+ 576: 'gondola',
+ 577: 'gong, tam-tam',
+ 578: 'gown',
+ 579: 'grand piano, grand',
+ 580: 'greenhouse, nursery, glasshouse',
+ 581: 'grille, radiator grille',
+ 582: 'grocery store, grocery, food market, market',
+ 583: 'guillotine',
+ 584: 'hair slide',
+ 585: 'hair spray',
+ 586: 'half track',
+ 587: 'hammer',
+ 588: 'hamper',
+ 589: 'hand blower, blow dryer, blow drier, hair dryer, hair drier',
+ 590: 'hand-held computer, hand-held microcomputer',
+ 591: 'handkerchief, hankie, hanky, hankey',
+ 592: 'hard disc, hard disk, fixed disk',
+ 593: 'harmonica, mouth organ, harp, mouth harp',
+ 594: 'harp',
+ 595: 'harvester, reaper',
+ 596: 'hatchet',
+ 597: 'holster',
+ 598: 'home theater, home theatre',
+ 599: 'honeycomb',
+ 600: 'hook, claw',
+ 601: 'hoopskirt, crinoline',
+ 602: 'horizontal bar, high bar',
+ 603: 'horse cart, horse-cart',
+ 604: 'hourglass',
+ 605: 'iPod',
+ 606: 'iron, smoothing iron',
+ 607: "jack-o'-lantern",
+ 608: 'jean, blue jean, denim',
+ 609: 'jeep, landrover',
+ 610: 'jersey, T-shirt, tee shirt',
+ 611: 'jigsaw puzzle',
+ 612: 'jinrikisha, ricksha, rickshaw',
+ 613: 'joystick',
+ 614: 'kimono',
+ 615: 'knee pad',
+ 616: 'knot',
+ 617: 'lab coat, laboratory coat',
+ 618: 'ladle',
+ 619: 'lampshade, lamp shade',
+ 620: 'laptop, laptop computer',
+ 621: 'lawn mower, mower',
+ 622: 'lens cap, lens cover',
+ 623: 'letter opener, paper knife, paperknife',
+ 624: 'library',
+ 625: 'lifeboat',
+ 626: 'lighter, light, igniter, ignitor',
+ 627: 'limousine, limo',
+ 628: 'liner, ocean liner',
+ 629: 'lipstick, lip rouge',
+ 630: 'Loafer',
+ 631: 'lotion',
+ 632: 'loudspeaker, speaker, speaker unit, loudspeaker system, speaker system',
+ 633: "loupe, jeweler's loupe",
+ 634: 'lumbermill, sawmill',
+ 635: 'magnetic compass',
+ 636: 'mailbag, postbag',
+ 637: 'mailbox, letter box',
+ 638: 'maillot',
+ 639: 'maillot, tank suit',
+ 640: 'manhole cover',
+ 641: 'maraca',
+ 642: 'marimba, xylophone',
+ 643: 'mask',
+ 644: 'matchstick',
+ 645: 'maypole',
+ 646: 'maze, labyrinth',
+ 647: 'measuring cup',
+ 648: 'medicine chest, medicine cabinet',
+ 649: 'megalith, megalithic structure',
+ 650: 'microphone, mike',
+ 651: 'microwave, microwave oven',
+ 652: 'military uniform',
+ 653: 'milk can',
+ 654: 'minibus',
+ 655: 'miniskirt, mini',
+ 656: 'minivan',
+ 657: 'missile',
+ 658: 'mitten',
+ 659: 'mixing bowl',
+ 660: 'mobile home, manufactured home',
+ 661: 'Model T',
+ 662: 'modem',
+ 663: 'monastery',
+ 664: 'monitor',
+ 665: 'moped',
+ 666: 'mortar',
+ 667: 'mortarboard',
+ 668: 'mosque',
+ 669: 'mosquito net',
+ 670: 'motor scooter, scooter',
+ 671: 'mountain bike, all-terrain bike, off-roader',
+ 672: 'mountain tent',
+ 673: 'mouse, computer mouse',
+ 674: 'mousetrap',
+ 675: 'moving van',
+ 676: 'muzzle',
+ 677: 'nail',
+ 678: 'neck brace',
+ 679: 'necklace',
+ 680: 'nipple',
+ 681: 'notebook, notebook computer',
+ 682: 'obelisk',
+ 683: 'oboe, hautboy, hautbois',
+ 684: 'ocarina, sweet potato',
+ 685: 'odometer, hodometer, mileometer, milometer',
+ 686: 'oil filter',
+ 687: 'organ, pipe organ',
+ 688: 'oscilloscope, scope, cathode-ray oscilloscope, CRO',
+ 689: 'overskirt',
+ 690: 'oxcart',
+ 691: 'oxygen mask',
+ 692: 'packet',
+ 693: 'paddle, boat paddle',
+ 694: 'paddlewheel, paddle wheel',
+ 695: 'padlock',
+ 696: 'paintbrush',
+ 697: "pajama, pyjama, pj's, jammies",
+ 698: 'palace',
+ 699: 'panpipe, pandean pipe, syrinx',
+ 700: 'paper towel',
+ 701: 'parachute, chute',
+ 702: 'parallel bars, bars',
+ 703: 'park bench',
+ 704: 'parking meter',
+ 705: 'passenger car, coach, carriage',
+ 706: 'patio, terrace',
+ 707: 'pay-phone, pay-station',
+ 708: 'pedestal, plinth, footstall',
+ 709: 'pencil box, pencil case',
+ 710: 'pencil sharpener',
+ 711: 'perfume, essence',
+ 712: 'Petri dish',
+ 713: 'photocopier',
+ 714: 'pick, plectrum, plectron',
+ 715: 'pickelhaube',
+ 716: 'picket fence, paling',
+ 717: 'pickup, pickup truck',
+ 718: 'pier',
+ 719: 'piggy bank, penny bank',
+ 720: 'pill bottle',
+ 721: 'pillow',
+ 722: 'ping-pong ball',
+ 723: 'pinwheel',
+ 724: 'pirate, pirate ship',
+ 725: 'pitcher, ewer',
+ 726: "plane, carpenter's plane, woodworking plane",
+ 727: 'planetarium',
+ 728: 'plastic bag',
+ 729: 'plate rack',
+ 730: 'plow, plough',
+ 731: "plunger, plumber's helper",
+ 732: 'Polaroid camera, Polaroid Land camera',
+ 733: 'pole',
+ 734: 'police van, police wagon, paddy wagon, patrol wagon, wagon, black Maria',
+ 735: 'poncho',
+ 736: 'pool table, billiard table, snooker table',
+ 737: 'pop bottle, soda bottle',
+ 738: 'pot, flowerpot',
+ 739: "potter's wheel",
+ 740: 'power drill',
+ 741: 'prayer rug, prayer mat',
+ 742: 'printer',
+ 743: 'prison, prison house',
+ 744: 'projectile, missile',
+ 745: 'projector',
+ 746: 'puck, hockey puck',
+ 747: 'punching bag, punch bag, punching ball, punchball',
+ 748: 'purse',
+ 749: 'quill, quill pen',
+ 750: 'quilt, comforter, comfort, puff',
+ 751: 'racer, race car, racing car',
+ 752: 'racket, racquet',
+ 753: 'radiator',
+ 754: 'radio, wireless',
+ 755: 'radio telescope, radio reflector',
+ 756: 'rain barrel',
+ 757: 'recreational vehicle, RV, R.V.',
+ 758: 'reel',
+ 759: 'reflex camera',
+ 760: 'refrigerator, icebox',
+ 761: 'remote control, remote',
+ 762: 'restaurant, eating house, eating place, eatery',
+ 763: 'revolver, six-gun, six-shooter',
+ 764: 'rifle',
+ 765: 'rocking chair, rocker',
+ 766: 'rotisserie',
+ 767: 'rubber eraser, rubber, pencil eraser',
+ 768: 'rugby ball',
+ 769: 'rule, ruler',
+ 770: 'running shoe',
+ 771: 'safe',
+ 772: 'safety pin',
+ 773: 'saltshaker, salt shaker',
+ 774: 'sandal',
+ 775: 'sarong',
+ 776: 'sax, saxophone',
+ 777: 'scabbard',
+ 778: 'scale, weighing machine',
+ 779: 'school bus',
+ 780: 'schooner',
+ 781: 'scoreboard',
+ 782: 'screen, CRT screen',
+ 783: 'screw',
+ 784: 'screwdriver',
+ 785: 'seat belt, seatbelt',
+ 786: 'sewing machine',
+ 787: 'shield, buckler',
+ 788: 'shoe shop, shoe-shop, shoe store',
+ 789: 'shoji',
+ 790: 'shopping basket',
+ 791: 'shopping cart',
+ 792: 'shovel',
+ 793: 'shower cap',
+ 794: 'shower curtain',
+ 795: 'ski',
+ 796: 'ski mask',
+ 797: 'sleeping bag',
+ 798: 'slide rule, slipstick',
+ 799: 'sliding door',
+ 800: 'slot, one-armed bandit',
+ 801: 'snorkel',
+ 802: 'snowmobile',
+ 803: 'snowplow, snowplough',
+ 804: 'soap dispenser',
+ 805: 'soccer ball',
+ 806: 'sock',
+ 807: 'solar dish, solar collector, solar furnace',
+ 808: 'sombrero',
+ 809: 'soup bowl',
+ 810: 'space bar',
+ 811: 'space heater',
+ 812: 'space shuttle',
+ 813: 'spatula',
+ 814: 'speedboat',
+ 815: "spider web, spider's web",
+ 816: 'spindle',
+ 817: 'sports car, sport car',
+ 818: 'spotlight, spot',
+ 819: 'stage',
+ 820: 'steam locomotive',
+ 821: 'steel arch bridge',
+ 822: 'steel drum',
+ 823: 'stethoscope',
+ 824: 'stole',
+ 825: 'stone wall',
+ 826: 'stopwatch, stop watch',
+ 827: 'stove',
+ 828: 'strainer',
+ 829: 'streetcar, tram, tramcar, trolley, trolley car',
+ 830: 'stretcher',
+ 831: 'studio couch, day bed',
+ 832: 'stupa, tope',
+ 833: 'submarine, pigboat, sub, U-boat',
+ 834: 'suit, suit of clothes',
+ 835: 'sundial',
+ 836: 'sunglass',
+ 837: 'sunglasses, dark glasses, shades',
+ 838: 'sunscreen, sunblock, sun blocker',
+ 839: 'suspension bridge',
+ 840: 'swab, swob, mop',
+ 841: 'sweatshirt',
+ 842: 'swimming trunks, bathing trunks',
+ 843: 'swing',
+ 844: 'switch, electric switch, electrical switch',
+ 845: 'syringe',
+ 846: 'table lamp',
+ 847: 'tank, army tank, armored combat vehicle, armoured combat vehicle',
+ 848: 'tape player',
+ 849: 'teapot',
+ 850: 'teddy, teddy bear',
+ 851: 'television, television system',
+ 852: 'tennis ball',
+ 853: 'thatch, thatched roof',
+ 854: 'theater curtain, theatre curtain',
+ 855: 'thimble',
+ 856: 'thresher, thrasher, threshing machine',
+ 857: 'throne',
+ 858: 'tile roof',
+ 859: 'toaster',
+ 860: 'tobacco shop, tobacconist shop, tobacconist',
+ 861: 'toilet seat',
+ 862: 'torch',
+ 863: 'totem pole',
+ 864: 'tow truck, tow car, wrecker',
+ 865: 'toyshop',
+ 866: 'tractor',
+ 867: 'trailer truck, tractor trailer, trucking rig, rig, articulated lorry, semi',
+ 868: 'tray',
+ 869: 'trench coat',
+ 870: 'tricycle, trike, velocipede',
+ 871: 'trimaran',
+ 872: 'tripod',
+ 873: 'triumphal arch',
+ 874: 'trolleybus, trolley coach, trackless trolley',
+ 875: 'trombone',
+ 876: 'tub, vat',
+ 877: 'turnstile',
+ 878: 'typewriter keyboard',
+ 879: 'umbrella',
+ 880: 'unicycle, monocycle',
+ 881: 'upright, upright piano',
+ 882: 'vacuum, vacuum cleaner',
+ 883: 'vase',
+ 884: 'vault',
+ 885: 'velvet',
+ 886: 'vending machine',
+ 887: 'vestment',
+ 888: 'viaduct',
+ 889: 'violin, fiddle',
+ 890: 'volleyball',
+ 891: 'waffle iron',
+ 892: 'wall clock',
+ 893: 'wallet, billfold, notecase, pocketbook',
+ 894: 'wardrobe, closet, press',
+ 895: 'warplane, military plane',
+ 896: 'washbasin, handbasin, washbowl, lavabo, wash-hand basin',
+ 897: 'washer, automatic washer, washing machine',
+ 898: 'water bottle',
+ 899: 'water jug',
+ 900: 'water tower',
+ 901: 'whiskey jug',
+ 902: 'whistle',
+ 903: 'wig',
+ 904: 'window screen',
+ 905: 'window shade',
+ 906: 'Windsor tie',
+ 907: 'wine bottle',
+ 908: 'wing',
+ 909: 'wok',
+ 910: 'wooden spoon',
+ 911: 'wool, woolen, woollen',
+ 912: 'worm fence, snake fence, snake-rail fence, Virginia fence',
+ 913: 'wreck',
+ 914: 'yawl',
+ 915: 'yurt',
+ 916: 'web site, website, internet site, site',
+ 917: 'comic book',
+ 918: 'crossword puzzle, crossword',
+ 919: 'street sign',
+ 920: 'traffic light, traffic signal, stoplight',
+ 921: 'book jacket, dust cover, dust jacket, dust wrapper',
+ 922: 'menu',
+ 923: 'plate',
+ 924: 'guacamole',
+ 925: 'consomme',
+ 926: 'hot pot, hotpot',
+ 927: 'trifle',
+ 928: 'ice cream, icecream',
+ 929: 'ice lolly, lolly, lollipop, popsicle',
+ 930: 'French loaf',
+ 931: 'bagel, beigel',
+ 932: 'pretzel',
+ 933: 'cheeseburger',
+ 934: 'hotdog, hot dog, red hot',
+ 935: 'mashed potato',
+ 936: 'head cabbage',
+ 937: 'broccoli',
+ 938: 'cauliflower',
+ 939: 'zucchini, courgette',
+ 940: 'spaghetti squash',
+ 941: 'acorn squash',
+ 942: 'butternut squash',
+ 943: 'cucumber, cuke',
+ 944: 'artichoke, globe artichoke',
+ 945: 'bell pepper',
+ 946: 'cardoon',
+ 947: 'mushroom',
+ 948: 'Granny Smith',
+ 949: 'strawberry',
+ 950: 'orange',
+ 951: 'lemon',
+ 952: 'fig',
+ 953: 'pineapple, ananas',
+ 954: 'banana',
+ 955: 'jackfruit, jak, jack',
+ 956: 'custard apple',
+ 957: 'pomegranate',
+ 958: 'hay',
+ 959: 'carbonara',
+ 960: 'chocolate sauce, chocolate syrup',
+ 961: 'dough',
+ 962: 'meat loaf, meatloaf',
+ 963: 'pizza, pizza pie',
+ 964: 'potpie',
+ 965: 'burrito',
+ 966: 'red wine',
+ 967: 'espresso',
+ 968: 'cup',
+ 969: 'eggnog',
+ 970: 'alp',
+ 971: 'bubble',
+ 972: 'cliff, drop, drop-off',
+ 973: 'coral reef',
+ 974: 'geyser',
+ 975: 'lakeside, lakeshore',
+ 976: 'promontory, headland, head, foreland',
+ 977: 'sandbar, sand bar',
+ 978: 'seashore, coast, seacoast, sea-coast',
+ 979: 'valley, vale',
+ 980: 'volcano',
+ 981: 'ballplayer, baseball player',
+ 982: 'groom, bridegroom',
+ 983: 'scuba diver',
+ 984: 'rapeseed',
+ 985: 'daisy',
+ 986: "yellow lady's slipper, yellow lady-slipper, Cypripedium calceolus, Cypripedium parviflorum",
+ 987: 'corn',
+ 988: 'acorn',
+ 989: 'hip, rose hip, rosehip',
+ 990: 'buckeye, horse chestnut, conker',
+ 991: 'coral fungus',
+ 992: 'agaric',
+ 993: 'gyromitra',
+ 994: 'stinkhorn, carrion fungus',
+ 995: 'earthstar',
+ 996: 'hen-of-the-woods, hen of the woods, Polyporus frondosus, Grifola frondosa',
+ 997: 'bolete',
+ 998: 'ear, spike, capitulum',
+ 999: 'toilet tissue, toilet paper, bathroom tissue'

gligen/ldm/data/index_synset.yaml

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gligen/ldm/data/lsun.py

@@ -0,0 +1,92 @@
+import os
+import numpy as np
+import PIL
+from PIL import Image
+from torch.utils.data import Dataset
+from torchvision import transforms
+
+
+class LSUNBase(Dataset):
+    def __init__(self,
+                 txt_file,
+                 data_root,
+                 size=None,
+                 interpolation="bicubic",
+                 flip_p=0.5
+                 ):
+        self.data_paths = txt_file
+        self.data_root = data_root
+        with open(self.data_paths, "r") as f:
+            self.image_paths = f.read().splitlines()
+        self._length = len(self.image_paths)
+        self.labels = {
+            "relative_file_path_": [l for l in self.image_paths],
+            "file_path_": [os.path.join(self.data_root, l)
+                           for l in self.image_paths],
+        }
+
+        self.size = size
+        self.interpolation = {"linear": PIL.Image.LINEAR,
+                              "bilinear": PIL.Image.BILINEAR,
+                              "bicubic": PIL.Image.BICUBIC,
+                              "lanczos": PIL.Image.LANCZOS,
+                              }[interpolation]
+        self.flip = transforms.RandomHorizontalFlip(p=flip_p)
+
+    def __len__(self):
+        return self._length
+
+    def __getitem__(self, i):
+        example = dict((k, self.labels[k][i]) for k in self.labels)
+        image = Image.open(example["file_path_"])
+        if not image.mode == "RGB":
+            image = image.convert("RGB")
+
+        # default to score-sde preprocessing
+        img = np.array(image).astype(np.uint8)
+        crop = min(img.shape[0], img.shape[1])
+        h, w, = img.shape[0], img.shape[1]
+        img = img[(h - crop) // 2:(h + crop) // 2,
+              (w - crop) // 2:(w + crop) // 2]
+
+        image = Image.fromarray(img)
+        if self.size is not None:
+            image = image.resize((self.size, self.size), resample=self.interpolation)
+
+        image = self.flip(image)
+        image = np.array(image).astype(np.uint8)
+        example["image"] = (image / 127.5 - 1.0).astype(np.float32)
+        return example
+
+
+class LSUNChurchesTrain(LSUNBase):
+    def __init__(self, **kwargs):
+        super().__init__(txt_file="data/lsun/church_outdoor_train.txt", data_root="data/lsun/churches", **kwargs)
+
+
+class LSUNChurchesValidation(LSUNBase):
+    def __init__(self, flip_p=0., **kwargs):
+        super().__init__(txt_file="data/lsun/church_outdoor_val.txt", data_root="data/lsun/churches",
+                         flip_p=flip_p, **kwargs)
+
+
+class LSUNBedroomsTrain(LSUNBase):
+    def __init__(self, **kwargs):
+        super().__init__(txt_file="data/lsun/bedrooms_train.txt", data_root="data/lsun/bedrooms", **kwargs)
+
+
+class LSUNBedroomsValidation(LSUNBase):
+    def __init__(self, flip_p=0.0, **kwargs):
+        super().__init__(txt_file="data/lsun/bedrooms_val.txt", data_root="data/lsun/bedrooms",
+                         flip_p=flip_p, **kwargs)
+
+
+class LSUNCatsTrain(LSUNBase):
+    def __init__(self, **kwargs):
+        super().__init__(txt_file="data/lsun/cat_train.txt", data_root="data/lsun/cats", **kwargs)
+
+
+class LSUNCatsValidation(LSUNBase):
+    def __init__(self, flip_p=0., **kwargs):
+        super().__init__(txt_file="data/lsun/cat_val.txt", data_root="data/lsun/cats",
+                         flip_p=flip_p, **kwargs)

gligen/ldm/lr_scheduler.py

@@ -0,0 +1,98 @@
+import numpy as np
+
+
+class LambdaWarmUpCosineScheduler:
+    """
+    note: use with a base_lr of 1.0
+    """
+    def __init__(self, warm_up_steps, lr_min, lr_max, lr_start, max_decay_steps, verbosity_interval=0):
+        self.lr_warm_up_steps = warm_up_steps
+        self.lr_start = lr_start
+        self.lr_min = lr_min
+        self.lr_max = lr_max
+        self.lr_max_decay_steps = max_decay_steps
+        self.last_lr = 0.
+        self.verbosity_interval = verbosity_interval
+
+    def schedule(self, n, **kwargs):
+        if self.verbosity_interval > 0:
+            if n % self.verbosity_interval == 0: print(f"current step: {n}, recent lr-multiplier: {self.last_lr}")
+        if n < self.lr_warm_up_steps:
+            lr = (self.lr_max - self.lr_start) / self.lr_warm_up_steps * n + self.lr_start
+            self.last_lr = lr
+            return lr
+        else:
+            t = (n - self.lr_warm_up_steps) / (self.lr_max_decay_steps - self.lr_warm_up_steps)
+            t = min(t, 1.0)
+            lr = self.lr_min + 0.5 * (self.lr_max - self.lr_min) * (
+                    1 + np.cos(t * np.pi))
+            self.last_lr = lr
+            return lr
+
+    def __call__(self, n, **kwargs):
+        return self.schedule(n,**kwargs)
+
+
+class LambdaWarmUpCosineScheduler2:
+    """
+    supports repeated iterations, configurable via lists
+    note: use with a base_lr of 1.0.
+    """
+    def __init__(self, warm_up_steps, f_min, f_max, f_start, cycle_lengths, verbosity_interval=0):
+        assert len(warm_up_steps) == len(f_min) == len(f_max) == len(f_start) == len(cycle_lengths)
+        self.lr_warm_up_steps = warm_up_steps
+        self.f_start = f_start
+        self.f_min = f_min
+        self.f_max = f_max
+        self.cycle_lengths = cycle_lengths
+        self.cum_cycles = np.cumsum([0] + list(self.cycle_lengths))
+        self.last_f = 0.
+        self.verbosity_interval = verbosity_interval
+
+    def find_in_interval(self, n):
+        interval = 0
+        for cl in self.cum_cycles[1:]:
+            if n <= cl:
+                return interval
+            interval += 1
+
+    def schedule(self, n, **kwargs):
+        cycle = self.find_in_interval(n)
+        n = n - self.cum_cycles[cycle]
+        if self.verbosity_interval > 0:
+            if n % self.verbosity_interval == 0: print(f"current step: {n}, recent lr-multiplier: {self.last_f}, "
+                                                       f"current cycle {cycle}")
+        if n < self.lr_warm_up_steps[cycle]:
+            f = (self.f_max[cycle] - self.f_start[cycle]) / self.lr_warm_up_steps[cycle] * n + self.f_start[cycle]
+            self.last_f = f
+            return f
+        else:
+            t = (n - self.lr_warm_up_steps[cycle]) / (self.cycle_lengths[cycle] - self.lr_warm_up_steps[cycle])
+            t = min(t, 1.0)
+            f = self.f_min[cycle] + 0.5 * (self.f_max[cycle] - self.f_min[cycle]) * (
+                    1 + np.cos(t * np.pi))
+            self.last_f = f
+            return f
+
+    def __call__(self, n, **kwargs):
+        return self.schedule(n, **kwargs)
+
+
+class LambdaLinearScheduler(LambdaWarmUpCosineScheduler2):
+
+    def schedule(self, n, **kwargs):
+        cycle = self.find_in_interval(n)
+        n = n - self.cum_cycles[cycle]
+        if self.verbosity_interval > 0:
+            if n % self.verbosity_interval == 0: print(f"current step: {n}, recent lr-multiplier: {self.last_f}, "
+                                                       f"current cycle {cycle}")
+
+        if n < self.lr_warm_up_steps[cycle]:
+            f = (self.f_max[cycle] - self.f_start[cycle]) / self.lr_warm_up_steps[cycle] * n + self.f_start[cycle]
+            self.last_f = f
+            return f
+        else:
+            f = self.f_min[cycle] + (self.f_max[cycle] - self.f_min[cycle]) * (self.cycle_lengths[cycle] - n) / (self.cycle_lengths[cycle])
+            self.last_f = f
+            return f
+

gligen/ldm/models/autoencoder.py

@@ -0,0 +1,52 @@
+import torch
+import torch.nn as nn
+#import pytorch_lightning as pl
+import torch.nn.functional as F
+from contextlib import contextmanager
+
+# from taming.modules.vqvae.quantize import VectorQuantizer2 as VectorQuantizer
+
+from ldm.modules.diffusionmodules.model import Encoder, Decoder
+from ldm.modules.distributions.distributions import DiagonalGaussianDistribution
+
+from ldm.util import instantiate_from_config
+
+
+
+
+class AutoencoderKL(nn.Module):
+    def __init__(self,
+                 ddconfig,
+                 embed_dim,
+                 scale_factor=1
+                 ):
+        super().__init__()
+        self.encoder = Encoder(**ddconfig)
+        self.decoder = Decoder(**ddconfig)
+        assert ddconfig["double_z"]
+        self.quant_conv = torch.nn.Conv2d(2*ddconfig["z_channels"], 2*embed_dim, 1)
+        self.post_quant_conv = torch.nn.Conv2d(embed_dim, ddconfig["z_channels"], 1)
+        self.embed_dim = embed_dim
+        self.scale_factor = scale_factor
+
+
+
+    def encode(self, x):
+        h = self.encoder(x)
+        moments = self.quant_conv(h)
+        posterior = DiagonalGaussianDistribution(moments)
+        return posterior.sample() * self.scale_factor
+
+    def decode(self, z):
+        z = 1. / self.scale_factor * z
+        z = self.post_quant_conv(z)
+        dec = self.decoder(z)
+        return dec
+
+
+
+
+
+
+
+

gligen/ldm/models/diffusion/classifier.py

@@ -0,0 +1,267 @@
+import os
+import torch
+import pytorch_lightning as pl
+from omegaconf import OmegaConf
+from torch.nn import functional as F
+from torch.optim import AdamW
+from torch.optim.lr_scheduler import LambdaLR
+from copy import deepcopy
+from einops import rearrange
+from glob import glob
+from natsort import natsorted
+
+from ldm.modules.diffusionmodules.openaimodel import EncoderUNetModel, UNetModel
+from ldm.util import log_txt_as_img, default, ismap, instantiate_from_config
+
+__models__ = {
+    'class_label': EncoderUNetModel,
+    'segmentation': UNetModel
+}
+
+
+def disabled_train(self, mode=True):
+    """Overwrite model.train with this function to make sure train/eval mode
+    does not change anymore."""
+    return self
+
+
+class NoisyLatentImageClassifier(pl.LightningModule):
+
+    def __init__(self,
+                 diffusion_path,
+                 num_classes,
+                 ckpt_path=None,
+                 pool='attention',
+                 label_key=None,
+                 diffusion_ckpt_path=None,
+                 scheduler_config=None,
+                 weight_decay=1.e-2,
+                 log_steps=10,
+                 monitor='val/loss',
+                 *args,
+                 **kwargs):
+        super().__init__(*args, **kwargs)
+        self.num_classes = num_classes
+        # get latest config of diffusion model
+        diffusion_config = natsorted(glob(os.path.join(diffusion_path, 'configs', '*-project.yaml')))[-1]
+        self.diffusion_config = OmegaConf.load(diffusion_config).model
+        self.diffusion_config.params.ckpt_path = diffusion_ckpt_path
+        self.load_diffusion()
+
+        self.monitor = monitor
+        self.numd = self.diffusion_model.first_stage_model.encoder.num_resolutions - 1
+        self.log_time_interval = self.diffusion_model.num_timesteps // log_steps
+        self.log_steps = log_steps
+
+        self.label_key = label_key if not hasattr(self.diffusion_model, 'cond_stage_key') \
+            else self.diffusion_model.cond_stage_key
+
+        assert self.label_key is not None, 'label_key neither in diffusion model nor in model.params'
+
+        if self.label_key not in __models__:
+            raise NotImplementedError()
+
+        self.load_classifier(ckpt_path, pool)
+
+        self.scheduler_config = scheduler_config
+        self.use_scheduler = self.scheduler_config is not None
+        self.weight_decay = weight_decay
+
+    def init_from_ckpt(self, path, ignore_keys=list(), only_model=False):
+        sd = torch.load(path, map_location="cpu")
+        if "state_dict" in list(sd.keys()):
+            sd = sd["state_dict"]
+        keys = list(sd.keys())
+        for k in keys:
+            for ik in ignore_keys:
+                if k.startswith(ik):
+                    print("Deleting key {} from state_dict.".format(k))
+                    del sd[k]
+        missing, unexpected = self.load_state_dict(sd, strict=False) if not only_model else self.model.load_state_dict(
+            sd, strict=False)
+        print(f"Restored from {path} with {len(missing)} missing and {len(unexpected)} unexpected keys")
+        if len(missing) > 0:
+            print(f"Missing Keys: {missing}")
+        if len(unexpected) > 0:
+            print(f"Unexpected Keys: {unexpected}")
+
+    def load_diffusion(self):
+        model = instantiate_from_config(self.diffusion_config)
+        self.diffusion_model = model.eval()
+        self.diffusion_model.train = disabled_train
+        for param in self.diffusion_model.parameters():
+            param.requires_grad = False
+
+    def load_classifier(self, ckpt_path, pool):
+        model_config = deepcopy(self.diffusion_config.params.unet_config.params)
+        model_config.in_channels = self.diffusion_config.params.unet_config.params.out_channels
+        model_config.out_channels = self.num_classes
+        if self.label_key == 'class_label':
+            model_config.pool = pool
+
+        self.model = __models__[self.label_key](**model_config)
+        if ckpt_path is not None:
+            print('#####################################################################')
+            print(f'load from ckpt "{ckpt_path}"')
+            print('#####################################################################')
+            self.init_from_ckpt(ckpt_path)
+
+    @torch.no_grad()
+    def get_x_noisy(self, x, t, noise=None):
+        noise = default(noise, lambda: torch.randn_like(x))
+        continuous_sqrt_alpha_cumprod = None
+        if self.diffusion_model.use_continuous_noise:
+            continuous_sqrt_alpha_cumprod = self.diffusion_model.sample_continuous_noise_level(x.shape[0], t + 1)
+            # todo: make sure t+1 is correct here
+
+        return self.diffusion_model.q_sample(x_start=x, t=t, noise=noise,
+                                             continuous_sqrt_alpha_cumprod=continuous_sqrt_alpha_cumprod)
+
+    def forward(self, x_noisy, t, *args, **kwargs):
+        return self.model(x_noisy, t)
+
+    @torch.no_grad()
+    def get_input(self, batch, k):
+        x = batch[k]
+        if len(x.shape) == 3:
+            x = x[..., None]
+        x = rearrange(x, 'b h w c -> b c h w')
+        x = x.to(memory_format=torch.contiguous_format).float()
+        return x
+
+    @torch.no_grad()
+    def get_conditioning(self, batch, k=None):
+        if k is None:
+            k = self.label_key
+        assert k is not None, 'Needs to provide label key'
+
+        targets = batch[k].to(self.device)
+
+        if self.label_key == 'segmentation':
+            targets = rearrange(targets, 'b h w c -> b c h w')
+            for down in range(self.numd):
+                h, w = targets.shape[-2:]
+                targets = F.interpolate(targets, size=(h // 2, w // 2), mode='nearest')
+
+            # targets = rearrange(targets,'b c h w -> b h w c')
+
+        return targets
+
+    def compute_top_k(self, logits, labels, k, reduction="mean"):
+        _, top_ks = torch.topk(logits, k, dim=1)
+        if reduction == "mean":
+            return (top_ks == labels[:, None]).float().sum(dim=-1).mean().item()
+        elif reduction == "none":
+            return (top_ks == labels[:, None]).float().sum(dim=-1)
+
+    def on_train_epoch_start(self):
+        # save some memory
+        self.diffusion_model.model.to('cpu')
+
+    @torch.no_grad()
+    def write_logs(self, loss, logits, targets):
+        log_prefix = 'train' if self.training else 'val'
+        log = {}
+        log[f"{log_prefix}/loss"] = loss.mean()
+        log[f"{log_prefix}/acc@1"] = self.compute_top_k(
+            logits, targets, k=1, reduction="mean"
+        )
+        log[f"{log_prefix}/acc@5"] = self.compute_top_k(
+            logits, targets, k=5, reduction="mean"
+        )
+
+        self.log_dict(log, prog_bar=False, logger=True, on_step=self.training, on_epoch=True)
+        self.log('loss', log[f"{log_prefix}/loss"], prog_bar=True, logger=False)
+        self.log('global_step', self.global_step, logger=False, on_epoch=False, prog_bar=True)
+        lr = self.optimizers().param_groups[0]['lr']
+        self.log('lr_abs', lr, on_step=True, logger=True, on_epoch=False, prog_bar=True)
+
+    def shared_step(self, batch, t=None):
+        x, *_ = self.diffusion_model.get_input(batch, k=self.diffusion_model.first_stage_key)
+        targets = self.get_conditioning(batch)
+        if targets.dim() == 4:
+            targets = targets.argmax(dim=1)
+        if t is None:
+            t = torch.randint(0, self.diffusion_model.num_timesteps, (x.shape[0],), device=self.device).long()
+        else:
+            t = torch.full(size=(x.shape[0],), fill_value=t, device=self.device).long()
+        x_noisy = self.get_x_noisy(x, t)
+        logits = self(x_noisy, t)
+
+        loss = F.cross_entropy(logits, targets, reduction='none')
+
+        self.write_logs(loss.detach(), logits.detach(), targets.detach())
+
+        loss = loss.mean()
+        return loss, logits, x_noisy, targets
+
+    def training_step(self, batch, batch_idx):
+        loss, *_ = self.shared_step(batch)
+        return loss
+
+    def reset_noise_accs(self):
+        self.noisy_acc = {t: {'acc@1': [], 'acc@5': []} for t in
+                          range(0, self.diffusion_model.num_timesteps, self.diffusion_model.log_every_t)}
+
+    def on_validation_start(self):
+        self.reset_noise_accs()
+
+    @torch.no_grad()
+    def validation_step(self, batch, batch_idx):
+        loss, *_ = self.shared_step(batch)
+
+        for t in self.noisy_acc:
+            _, logits, _, targets = self.shared_step(batch, t)
+            self.noisy_acc[t]['acc@1'].append(self.compute_top_k(logits, targets, k=1, reduction='mean'))
+            self.noisy_acc[t]['acc@5'].append(self.compute_top_k(logits, targets, k=5, reduction='mean'))
+
+        return loss
+
+    def configure_optimizers(self):
+        optimizer = AdamW(self.model.parameters(), lr=self.learning_rate, weight_decay=self.weight_decay)
+
+        if self.use_scheduler:
+            scheduler = instantiate_from_config(self.scheduler_config)
+
+            print("Setting up LambdaLR scheduler...")
+            scheduler = [
+                {
+                    'scheduler': LambdaLR(optimizer, lr_lambda=scheduler.schedule),
+                    'interval': 'step',
+                    'frequency': 1
+                }]
+            return [optimizer], scheduler
+
+        return optimizer
+
+    @torch.no_grad()
+    def log_images(self, batch, N=8, *args, **kwargs):
+        log = dict()
+        x = self.get_input(batch, self.diffusion_model.first_stage_key)
+        log['inputs'] = x
+
+        y = self.get_conditioning(batch)
+
+        if self.label_key == 'class_label':
+            y = log_txt_as_img((x.shape[2], x.shape[3]), batch["human_label"])
+            log['labels'] = y
+
+        if ismap(y):
+            log['labels'] = self.diffusion_model.to_rgb(y)
+
+            for step in range(self.log_steps):
+                current_time = step * self.log_time_interval
+
+                _, logits, x_noisy, _ = self.shared_step(batch, t=current_time)
+
+                log[f'inputs@t{current_time}'] = x_noisy
+
+                pred = F.one_hot(logits.argmax(dim=1), num_classes=self.num_classes)
+                pred = rearrange(pred, 'b h w c -> b c h w')
+
+                log[f'pred@t{current_time}'] = self.diffusion_model.to_rgb(pred)
+
+        for key in log:
+            log[key] = log[key][:N]
+
+        return log

gligen/ldm/models/diffusion/ddim.py

@@ -0,0 +1,134 @@
+import torch
+import numpy as np
+from tqdm import tqdm
+from functools import partial
+
+from ldm.modules.diffusionmodules.util import make_ddim_sampling_parameters, make_ddim_timesteps, noise_like
+
+
+class DDIMSampler(object):
+    def __init__(self, diffusion, model, schedule="linear", alpha_generator_func=None, set_alpha_scale=None):
+        super().__init__()
+        self.diffusion = diffusion
+        self.model = model
+        self.device = diffusion.betas.device
+        self.ddpm_num_timesteps = diffusion.num_timesteps
+        self.schedule = schedule
+        self.alpha_generator_func = alpha_generator_func
+        self.set_alpha_scale = set_alpha_scale
+        
+
+    def register_buffer(self, name, attr):
+        if type(attr) == torch.Tensor:
+            attr = attr.to(self.device)
+        setattr(self, name, attr)
+
+
+    def make_schedule(self, ddim_num_steps, ddim_discretize="uniform", ddim_eta=0.):
+        self.ddim_timesteps = make_ddim_timesteps(ddim_discr_method=ddim_discretize, num_ddim_timesteps=ddim_num_steps,
+                                                  num_ddpm_timesteps=self.ddpm_num_timesteps,verbose=False)
+        alphas_cumprod = self.diffusion.alphas_cumprod
+        assert alphas_cumprod.shape[0] == self.ddpm_num_timesteps, 'alphas have to be defined for each timestep'
+        to_torch = lambda x: x.clone().detach().to(torch.float32).to(self.device)
+
+        self.register_buffer('betas', to_torch(self.diffusion.betas))
+        self.register_buffer('alphas_cumprod', to_torch(alphas_cumprod))
+        self.register_buffer('alphas_cumprod_prev', to_torch(self.diffusion.alphas_cumprod_prev))
+
+        # calculations for diffusion q(x_t | x_{t-1}) and others
+        self.register_buffer('sqrt_alphas_cumprod', to_torch(np.sqrt(alphas_cumprod.cpu())))
+        self.register_buffer('sqrt_one_minus_alphas_cumprod', to_torch(np.sqrt(1. - alphas_cumprod.cpu())))
+        self.register_buffer('log_one_minus_alphas_cumprod', to_torch(np.log(1. - alphas_cumprod.cpu())))
+        self.register_buffer('sqrt_recip_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu())))
+        self.register_buffer('sqrt_recipm1_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu() - 1)))
+
+        # ddim sampling parameters
+        ddim_sigmas, ddim_alphas, ddim_alphas_prev = make_ddim_sampling_parameters(alphacums=alphas_cumprod.cpu(),
+                                                                                   ddim_timesteps=self.ddim_timesteps,
+                                                                                   eta=ddim_eta,verbose=False)
+        self.register_buffer('ddim_sigmas', ddim_sigmas)
+        self.register_buffer('ddim_alphas', ddim_alphas)
+        self.register_buffer('ddim_alphas_prev', ddim_alphas_prev)
+        self.register_buffer('ddim_sqrt_one_minus_alphas', np.sqrt(1. - ddim_alphas))
+        sigmas_for_original_sampling_steps = ddim_eta * torch.sqrt(
+            (1 - self.alphas_cumprod_prev) / (1 - self.alphas_cumprod) * (
+                        1 - self.alphas_cumprod / self.alphas_cumprod_prev))
+        self.register_buffer('ddim_sigmas_for_original_num_steps', sigmas_for_original_sampling_steps)
+
+
+    @torch.no_grad()
+    def sample(self, S, shape, input, uc=None, guidance_scale=1, mask=None, x0=None):
+        self.make_schedule(ddim_num_steps=S)
+        return self.ddim_sampling(shape, input, uc, guidance_scale,  mask=mask, x0=x0)
+ 
+
+    @torch.no_grad()
+    def ddim_sampling(self, shape, input, uc, guidance_scale=1, mask=None, x0=None):
+        b = shape[0]
+        
+        img = input["x"]
+        if img == None:     
+            img = torch.randn(shape, device=self.device)
+            input["x"] = img
+
+
+        time_range = np.flip(self.ddim_timesteps)
+        total_steps = self.ddim_timesteps.shape[0]
+
+        #iterator = tqdm(time_range, desc='DDIM Sampler', total=total_steps)
+        iterator = time_range
+  
+        if self.alpha_generator_func != None:
+            alphas = self.alpha_generator_func(len(iterator))
+
+
+        for i, step in enumerate(iterator):
+
+            # set alpha 
+            if self.alpha_generator_func != None:
+                self.set_alpha_scale(self.model, alphas[i])
+
+            # run 
+            index = total_steps - i - 1
+            input["timesteps"] = torch.full((b,), step, device=self.device, dtype=torch.long)
+            
+            if mask is not None:
+                assert x0 is not None
+                img_orig = self.diffusion.q_sample( x0, input["timesteps"] ) 
+                img = img_orig * mask + (1. - mask) * img
+                input["x"] = img
+            
+            img, pred_x0 = self.p_sample_ddim(input, index=index, uc=uc, guidance_scale=guidance_scale)
+            input["x"] = img 
+
+        return img
+
+
+    @torch.no_grad()
+    def p_sample_ddim(self, input, index, uc=None, guidance_scale=1):
+
+
+        e_t = self.model(input) 
+        if uc is not None and guidance_scale != 1:
+            unconditional_input = dict(x=input["x"], timesteps=input["timesteps"], context=uc)
+            if "inpainting_extra_input" in input:
+                unconditional_input["inpainting_extra_input"] = input["inpainting_extra_input"]
+            e_t_uncond = self.model( unconditional_input ) 
+            e_t = e_t_uncond + guidance_scale * (e_t - e_t_uncond)
+
+        # select parameters corresponding to the currently considered timestep
+        b = input["x"].shape[0] 
+        a_t = torch.full((b, 1, 1, 1), self.ddim_alphas[index], device=self.device)
+        a_prev = torch.full((b, 1, 1, 1), self.ddim_alphas_prev[index], device=self.device)
+        sigma_t = torch.full((b, 1, 1, 1), self.ddim_sigmas[index], device=self.device)
+        sqrt_one_minus_at = torch.full((b, 1, 1, 1), self.ddim_sqrt_one_minus_alphas[index],device=self.device)
+
+        # current prediction for x_0
+        pred_x0 = (input["x"] - sqrt_one_minus_at * e_t) / a_t.sqrt()
+
+        # direction pointing to x_t
+        dir_xt = (1. - a_prev - sigma_t**2).sqrt() * e_t
+        noise = sigma_t * torch.randn_like( input["x"] ) 
+        x_prev = a_prev.sqrt() * pred_x0 + dir_xt + noise
+
+        return x_prev, pred_x0

gligen/ldm/models/diffusion/ddpm.py

@@ -0,0 +1,72 @@
+import torch
+import torch.nn as nn
+import numpy as np
+from functools import partial
+from ldm.modules.diffusionmodules.util import make_beta_schedule
+
+
+
+
+
+class DDPM(nn.Module):
+    def __init__(self, beta_schedule="linear", timesteps=1000, linear_start=1e-4, linear_end=2e-2, cosine_s=8e-3):
+        super().__init__()
+
+        self.v_posterior = 0 
+        self.register_schedule(beta_schedule, timesteps, linear_start, linear_end, cosine_s)
+
+
+    def register_schedule(self, beta_schedule="linear", timesteps=1000, linear_start=1e-4, linear_end=2e-2, cosine_s=8e-3):
+        
+        betas = make_beta_schedule(beta_schedule, timesteps, linear_start=linear_start, linear_end=linear_end, cosine_s=cosine_s)
+        alphas = 1. - betas
+        alphas_cumprod = np.cumprod(alphas, axis=0)
+        alphas_cumprod_prev = np.append(1., alphas_cumprod[:-1])
+
+        timesteps, = betas.shape
+        self.num_timesteps = int(timesteps)
+        self.linear_start = linear_start
+        self.linear_end = linear_end
+        assert alphas_cumprod.shape[0] == self.num_timesteps, 'alphas have to be defined for each timestep'
+
+        to_torch = partial(torch.tensor, dtype=torch.float32)
+
+        self.register_buffer('betas', to_torch(betas))
+        self.register_buffer('alphas_cumprod', to_torch(alphas_cumprod))
+        self.register_buffer('alphas_cumprod_prev', to_torch(alphas_cumprod_prev))
+
+        # calculations for diffusion q(x_t | x_{t-1}) and others
+        self.register_buffer('sqrt_alphas_cumprod', to_torch(np.sqrt(alphas_cumprod)))
+        self.register_buffer('sqrt_one_minus_alphas_cumprod', to_torch(np.sqrt(1. - alphas_cumprod)))
+        self.register_buffer('log_one_minus_alphas_cumprod', to_torch(np.log(1. - alphas_cumprod)))
+        self.register_buffer('sqrt_recip_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod)))
+        self.register_buffer('sqrt_recipm1_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod - 1)))
+
+        # calculations for posterior q(x_{t-1} | x_t, x_0)
+        posterior_variance = (1 - self.v_posterior) * betas * (1. - alphas_cumprod_prev) / ( 1. - alphas_cumprod) + self.v_posterior * betas
+        # above: equal to 1. / (1. / (1. - alpha_cumprod_tm1) + alpha_t / beta_t)
+        
+        self.register_buffer('posterior_variance', to_torch(posterior_variance))
+        
+        # below: log calculation clipped because the posterior variance is 0 at the beginning of the diffusion chain
+        self.register_buffer('posterior_log_variance_clipped', to_torch(np.log(np.maximum(posterior_variance, 1e-20))))
+        self.register_buffer('posterior_mean_coef1', to_torch( betas * np.sqrt(alphas_cumprod_prev) / (1. - alphas_cumprod)))
+        self.register_buffer('posterior_mean_coef2', to_torch( (1. - alphas_cumprod_prev) * np.sqrt(alphas) / (1. - alphas_cumprod)))
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

gligen/ldm/models/diffusion/ldm.py

@@ -0,0 +1,88 @@
+import torch
+import torch.nn as nn
+import numpy as np
+from tqdm import tqdm
+from ldm.util import default
+from ldm.modules.diffusionmodules.util import  extract_into_tensor
+from .ddpm import DDPM
+
+
+
+class LatentDiffusion(DDPM):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # hardcoded 
+        self.clip_denoised = False
+        
+
+
+    def q_sample(self, x_start, t, noise=None):
+        noise = default(noise, lambda: torch.randn_like(x_start))
+        return (extract_into_tensor(self.sqrt_alphas_cumprod, t, x_start.shape) * x_start +
+                extract_into_tensor(self.sqrt_one_minus_alphas_cumprod, t, x_start.shape) * noise)
+
+
+    "Does not support DDPM sampling anymore. Only do DDIM or PLMS"
+
+    # = = = = = = = = = = = = Below is for sampling = = = = = = = = = = = = # 
+
+    # def predict_start_from_noise(self, x_t, t, noise):
+    #     return ( extract_into_tensor(self.sqrt_recip_alphas_cumprod, t, x_t.shape) * x_t -
+    #              extract_into_tensor(self.sqrt_recipm1_alphas_cumprod, t, x_t.shape) * noise )
+
+    # def q_posterior(self, x_start, x_t, t):
+    #     posterior_mean = (
+    #             extract_into_tensor(self.posterior_mean_coef1, t, x_t.shape) * x_start +
+    #             extract_into_tensor(self.posterior_mean_coef2, t, x_t.shape) * x_t
+    #     )
+    #     posterior_variance = extract_into_tensor(self.posterior_variance, t, x_t.shape)
+    #     posterior_log_variance_clipped = extract_into_tensor(self.posterior_log_variance_clipped, t, x_t.shape)
+    #     return posterior_mean, posterior_variance, posterior_log_variance_clipped
+
+
+    # def p_mean_variance(self, model, x, c, t):
+
+    #     model_out = model(x, t, c)
+    #     x_recon = self.predict_start_from_noise(x, t=t, noise=model_out)
+
+    #     if self.clip_denoised:
+    #         x_recon.clamp_(-1., 1.)
+
+    #     model_mean, posterior_variance, posterior_log_variance = self.q_posterior(x_start=x_recon, x_t=x, t=t)
+    #     return model_mean, posterior_variance, posterior_log_variance, x_recon
+
+
+    # @torch.no_grad()
+    # def p_sample(self, model, x, c, t):
+    #     b, *_, device = *x.shape, x.device
+    #     model_mean, _, model_log_variance, x0 = self.p_mean_variance(model, x=x, c=c, t=t, )
+    #     noise = torch.randn_like(x) 
+
+    #     # no noise when t == 0
+    #     nonzero_mask = (1 - (t == 0).float()).reshape(b, *((1,) * (len(x.shape) - 1)))
+
+    #     return model_mean + nonzero_mask * (0.5 * model_log_variance).exp() * noise, x0
+
+
+    # @torch.no_grad()
+    # def p_sample_loop(self, model, shape, c):
+    #     device = self.betas.device
+    #     b = shape[0]
+    #     img = torch.randn(shape, device=device)
+
+    #     iterator = tqdm(reversed(range(0, self.num_timesteps)), desc='Sampling t', total=self.num_timesteps) 
+    #     for i in iterator:
+    #         ts = torch.full((b,), i, device=device, dtype=torch.long)
+    #         img, x0 = self.p_sample(model, img, c, ts)
+
+    #     return img
+
+
+    # @torch.no_grad()
+    # def sample(self, model, shape, c, uc=None, guidance_scale=None):
+    #     return self.p_sample_loop(model, shape, c)
+
+
+
+
+

gligen/ldm/models/diffusion/plms.py

@@ -0,0 +1,162 @@
+import torch
+import numpy as np
+from tqdm import tqdm
+from functools import partial
+from copy import deepcopy
+from ldm.modules.diffusionmodules.util import make_ddim_sampling_parameters, make_ddim_timesteps, noise_like
+
+
+class PLMSSampler(object):
+    def __init__(self, diffusion, model, schedule="linear", alpha_generator_func=None, set_alpha_scale=None):
+        super().__init__()
+        self.diffusion = diffusion
+        self.model = model
+        self.device = diffusion.betas.device
+        self.ddpm_num_timesteps = diffusion.num_timesteps
+        self.schedule = schedule
+        self.alpha_generator_func = alpha_generator_func
+        self.set_alpha_scale = set_alpha_scale
+
+    def register_buffer(self, name, attr):
+        if type(attr) == torch.Tensor:
+            attr = attr.to(self.device)
+        setattr(self, name, attr)
+
+    def make_schedule(self, ddim_num_steps, ddim_discretize="uniform", ddim_eta=0., verbose=False):
+        if ddim_eta != 0:
+            raise ValueError('ddim_eta must be 0 for PLMS')
+        self.ddim_timesteps = make_ddim_timesteps(ddim_discr_method=ddim_discretize, num_ddim_timesteps=ddim_num_steps,
+                                                  num_ddpm_timesteps=self.ddpm_num_timesteps,verbose=verbose)
+        alphas_cumprod = self.diffusion.alphas_cumprod
+        assert alphas_cumprod.shape[0] == self.ddpm_num_timesteps, 'alphas have to be defined for each timestep'
+        to_torch = lambda x: x.clone().detach().to(torch.float32).to(self.device)
+
+        self.register_buffer('betas', to_torch(self.diffusion.betas))
+        self.register_buffer('alphas_cumprod', to_torch(alphas_cumprod))
+        self.register_buffer('alphas_cumprod_prev', to_torch(self.diffusion.alphas_cumprod_prev))
+
+        # calculations for diffusion q(x_t | x_{t-1}) and others
+        self.register_buffer('sqrt_alphas_cumprod', to_torch(np.sqrt(alphas_cumprod.cpu())))
+        self.register_buffer('sqrt_one_minus_alphas_cumprod', to_torch(np.sqrt(1. - alphas_cumprod.cpu())))
+        self.register_buffer('log_one_minus_alphas_cumprod', to_torch(np.log(1. - alphas_cumprod.cpu())))
+        self.register_buffer('sqrt_recip_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu())))
+        self.register_buffer('sqrt_recipm1_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu() - 1)))
+
+        # ddim sampling parameters
+        ddim_sigmas, ddim_alphas, ddim_alphas_prev = make_ddim_sampling_parameters(alphacums=alphas_cumprod.cpu(),
+                                                                                   ddim_timesteps=self.ddim_timesteps,
+                                                                                   eta=ddim_eta,verbose=verbose)
+        self.register_buffer('ddim_sigmas', ddim_sigmas)
+        self.register_buffer('ddim_alphas', ddim_alphas)
+        self.register_buffer('ddim_alphas_prev', ddim_alphas_prev)
+        self.register_buffer('ddim_sqrt_one_minus_alphas', np.sqrt(1. - ddim_alphas))
+        sigmas_for_original_sampling_steps = ddim_eta * torch.sqrt(
+            (1 - self.alphas_cumprod_prev) / (1 - self.alphas_cumprod) * (
+                        1 - self.alphas_cumprod / self.alphas_cumprod_prev))
+        self.register_buffer('ddim_sigmas_for_original_num_steps', sigmas_for_original_sampling_steps)
+
+
+    @torch.no_grad()
+    def sample(self, S, shape, input, uc=None, guidance_scale=1, mask=None, x0=None):
+        self.make_schedule(ddim_num_steps=S)
+        return self.plms_sampling(shape, input, uc, guidance_scale, mask=mask, x0=x0)
+
+
+    @torch.no_grad()
+    def plms_sampling(self, shape, input, uc=None, guidance_scale=1, mask=None, x0=None):
+
+        b = shape[0]
+        
+        img = input["x"]
+        if img == None:     
+            img = torch.randn(shape, device=self.device)
+            input["x"] = img
+
+        time_range = np.flip(self.ddim_timesteps)
+        total_steps = self.ddim_timesteps.shape[0]
+
+        old_eps = []
+
+        if self.alpha_generator_func != None:
+            alphas = self.alpha_generator_func(len(time_range))
+
+        for i, step in enumerate(time_range):
+
+            # set alpha 
+            if self.alpha_generator_func != None:
+                self.set_alpha_scale(self.model, alphas[i])
+
+            # run 
+            index = total_steps - i - 1
+            ts = torch.full((b,), step, device=self.device, dtype=torch.long)
+            ts_next = torch.full((b,), time_range[min(i + 1, len(time_range) - 1)], device=self.device, dtype=torch.long)
+
+            if mask is not None:
+                assert x0 is not None
+                img_orig = self.diffusion.q_sample(x0, ts)  
+                img = img_orig * mask + (1. - mask) * img
+                input["x"] = img
+
+            img, pred_x0, e_t = self.p_sample_plms(input, ts, index=index, uc=uc, guidance_scale=guidance_scale, old_eps=old_eps, t_next=ts_next)
+            input["x"] = img
+            old_eps.append(e_t)
+            if len(old_eps) >= 4:
+                old_eps.pop(0)
+
+        return img
+
+
+    @torch.no_grad()
+    def p_sample_plms(self, input, t, index, guidance_scale=1., uc=None, old_eps=None, t_next=None):
+        x = deepcopy(input["x"]) 
+        b = x.shape[0]
+
+        def get_model_output(input):
+            e_t = self.model(input) 
+            if uc is not None and guidance_scale != 1:
+                unconditional_input = dict(x=input["x"], timesteps=input["timesteps"], context=uc)
+                if "inpainting_extra_input" in input:
+                    unconditional_input["inpainting_extra_input"] = input["inpainting_extra_input"]
+                e_t_uncond = self.model( unconditional_input ) 
+                e_t = e_t_uncond + guidance_scale * (e_t - e_t_uncond)
+            return e_t
+
+
+        def get_x_prev_and_pred_x0(e_t, index):
+            # select parameters corresponding to the currently considered timestep
+            a_t = torch.full((b, 1, 1, 1), self.ddim_alphas[index], device=self.device)
+            a_prev = torch.full((b, 1, 1, 1), self.ddim_alphas_prev[index], device=self.device)
+            sigma_t = torch.full((b, 1, 1, 1), self.ddim_sigmas[index], device=self.device)
+            sqrt_one_minus_at = torch.full((b, 1, 1, 1), self.ddim_sqrt_one_minus_alphas[index],device=self.device)
+
+            # current prediction for x_0
+            pred_x0 = (x - sqrt_one_minus_at * e_t) / a_t.sqrt()
+
+            # direction pointing to x_t
+            dir_xt = (1. - a_prev - sigma_t**2).sqrt() * e_t
+            noise = sigma_t * torch.randn_like(x)
+            x_prev = a_prev.sqrt() * pred_x0 + dir_xt + noise
+            return x_prev, pred_x0
+
+        input["timesteps"] = t 
+        e_t = get_model_output(input)
+        if len(old_eps) == 0:
+            # Pseudo Improved Euler (2nd order)
+            x_prev, pred_x0 = get_x_prev_and_pred_x0(e_t, index)
+            input["x"] = x_prev
+            input["timesteps"] = t_next
+            e_t_next = get_model_output(input)
+            e_t_prime = (e_t + e_t_next) / 2
+        elif len(old_eps) == 1:
+            # 2nd order Pseudo Linear Multistep (Adams-Bashforth)
+            e_t_prime = (3 * e_t - old_eps[-1]) / 2
+        elif len(old_eps) == 2:
+            # 3nd order Pseudo Linear Multistep (Adams-Bashforth)
+            e_t_prime = (23 * e_t - 16 * old_eps[-1] + 5 * old_eps[-2]) / 12
+        elif len(old_eps) >= 3:
+            # 4nd order Pseudo Linear Multistep (Adams-Bashforth)
+            e_t_prime = (55 * e_t - 59 * old_eps[-1] + 37 * old_eps[-2] - 9 * old_eps[-3]) / 24
+
+        x_prev, pred_x0 = get_x_prev_and_pred_x0(e_t_prime, index)
+
+        return x_prev, pred_x0, e_t

gligen/ldm/modules/attention.py

@@ -0,0 +1,387 @@
+from inspect import isfunction
+import math
+import torch
+import torch.nn.functional as F
+from torch import nn, einsum
+from einops import rearrange, repeat
+
+# from ldm.modules.diffusionmodules.util import checkpoint, FourierEmbedder
+from torch.utils import checkpoint
+
+try:
+    import xformers
+    import xformers.ops
+    XFORMERS_IS_AVAILBLE = True
+except:
+    XFORMERS_IS_AVAILBLE = False
+
+
+def exists(val):
+    return val is not None
+
+
+def uniq(arr):
+    return{el: True for el in arr}.keys()
+
+
+def default(val, d):
+    if exists(val):
+        return val
+    return d() if isfunction(d) else d
+
+
+def max_neg_value(t):
+    return -torch.finfo(t.dtype).max
+
+
+def init_(tensor):
+    dim = tensor.shape[-1]
+    std = 1 / math.sqrt(dim)
+    tensor.uniform_(-std, std)
+    return tensor
+
+
+# feedforward
+class GEGLU(nn.Module):
+    def __init__(self, dim_in, dim_out):
+        super().__init__()
+        self.proj = nn.Linear(dim_in, dim_out * 2)
+
+    def forward(self, x):
+        x, gate = self.proj(x).chunk(2, dim=-1)
+        return x * F.gelu(gate)
+
+
+class FeedForward(nn.Module):
+    def __init__(self, dim, dim_out=None, mult=4, glu=False, dropout=0.):
+        super().__init__()
+        inner_dim = int(dim * mult)
+        dim_out = default(dim_out, dim)
+        project_in = nn.Sequential(
+            nn.Linear(dim, inner_dim),
+            nn.GELU()
+        ) if not glu else GEGLU(dim, inner_dim)
+
+        self.net = nn.Sequential(
+            project_in,
+            nn.Dropout(dropout),
+            nn.Linear(inner_dim, dim_out)
+        )
+
+    def forward(self, x):
+        return self.net(x)
+
+
+def zero_module(module):
+    """
+    Zero out the parameters of a module and return it.
+    """
+    for p in module.parameters():
+        p.detach().zero_()
+    return module
+
+
+def Normalize(in_channels):
+    return torch.nn.GroupNorm(num_groups=32, num_channels=in_channels, eps=1e-6, affine=True)
+
+
+class LinearAttention(nn.Module):
+    def __init__(self, dim, heads=4, dim_head=32):
+        super().__init__()
+        self.heads = heads
+        hidden_dim = dim_head * heads
+        self.to_qkv = nn.Conv2d(dim, hidden_dim * 3, 1, bias = False)
+        self.to_out = nn.Conv2d(hidden_dim, dim, 1)
+
+    def forward(self, x):
+        b, c, h, w = x.shape
+        qkv = self.to_qkv(x)
+        q, k, v = rearrange(qkv, 'b (qkv heads c) h w -> qkv b heads c (h w)', heads = self.heads, qkv=3)
+        k = k.softmax(dim=-1)  
+        context = torch.einsum('bhdn,bhen->bhde', k, v)
+        out = torch.einsum('bhde,bhdn->bhen', context, q)
+        out = rearrange(out, 'b heads c (h w) -> b (heads c) h w', heads=self.heads, h=h, w=w)
+        return self.to_out(out)
+
+
+
+
+class CrossAttention(nn.Module):
+    def __init__(self, query_dim, key_dim, value_dim, heads=8, dim_head=64, dropout=0):
+        super().__init__()
+        inner_dim = dim_head * heads
+        self.scale = dim_head ** -0.5
+        self.heads = heads
+        self.dim_head = dim_head
+
+        self.to_q = nn.Linear(query_dim, inner_dim, bias=False)
+        self.to_k = nn.Linear(key_dim, inner_dim, bias=False)
+        self.to_v = nn.Linear(value_dim, inner_dim, bias=False)
+
+
+        self.to_out = nn.Sequential( nn.Linear(inner_dim, query_dim), nn.Dropout(dropout) )
+
+
+    def fill_inf_from_mask(self, sim, mask):
+        if mask is not None:
+            B,M = mask.shape
+            mask = mask.unsqueeze(1).repeat(1,self.heads,1).reshape(B*self.heads,1,-1)
+            max_neg_value = -torch.finfo(sim.dtype).max
+            sim.masked_fill_(~mask, max_neg_value)
+        return sim 
+
+    def forward_plain(self, x, key, value, mask=None):
+
+        q = self.to_q(x)     # B*N*(H*C)
+        k = self.to_k(key)   # B*M*(H*C)
+        v = self.to_v(value) # B*M*(H*C)
+   
+        B, N, HC = q.shape 
+        _, M, _ = key.shape
+        H = self.heads
+        C = HC // H 
+
+        q = q.view(B,N,H,C).permute(0,2,1,3).reshape(B*H,N,C) # (B*H)*N*C
+        k = k.view(B,M,H,C).permute(0,2,1,3).reshape(B*H,M,C) # (B*H)*M*C
+        v = v.view(B,M,H,C).permute(0,2,1,3).reshape(B*H,M,C) # (B*H)*M*C
+
+        sim = torch.einsum('b i d, b j d -> b i j', q, k) * self.scale # (B*H)*N*M
+        self.fill_inf_from_mask(sim, mask)
+        attn = sim.softmax(dim=-1) # (B*H)*N*M
+
+        out = torch.einsum('b i j, b j d -> b i d', attn, v) # (B*H)*N*C
+        out = out.view(B,H,N,C).permute(0,2,1,3).reshape(B,N,(H*C)) # B*N*(H*C)
+
+        return self.to_out(out)
+
+    def forward(self, x, key, value, mask=None):
+        if not XFORMERS_IS_AVAILBLE:
+            return self.forward_plain(x, key, value, mask)
+
+        q = self.to_q(x)     # B*N*(H*C)
+        k = self.to_k(key)   # B*M*(H*C)
+        v = self.to_v(value) # B*M*(H*C)
+
+        b, _, _ = q.shape
+        q, k, v = map(
+            lambda t: t.unsqueeze(3)
+            .reshape(b, t.shape[1], self.heads, self.dim_head)
+            .permute(0, 2, 1, 3)
+            .reshape(b * self.heads, t.shape[1], self.dim_head)
+            .contiguous(),
+            (q, k, v),
+        )
+
+        # actually compute the attention, what we cannot get enough of
+        out = xformers.ops.memory_efficient_attention(q, k, v, attn_bias=None, op=None)
+
+        if exists(mask):
+            raise NotImplementedError
+        out = (
+            out.unsqueeze(0)
+            .reshape(b, self.heads, out.shape[1], self.dim_head)
+            .permute(0, 2, 1, 3)
+            .reshape(b, out.shape[1], self.heads * self.dim_head)
+        )
+        return self.to_out(out)
+
+
+
+
+
+class SelfAttention(nn.Module):
+    def __init__(self, query_dim, heads=8, dim_head=64, dropout=0.):
+        super().__init__()
+        inner_dim = dim_head * heads
+        self.scale = dim_head ** -0.5
+        self.heads = heads
+        self.dim_head = dim_head
+
+        self.to_q = nn.Linear(query_dim, inner_dim, bias=False)
+        self.to_k = nn.Linear(query_dim, inner_dim, bias=False)
+        self.to_v = nn.Linear(query_dim, inner_dim, bias=False)
+
+        self.to_out = nn.Sequential(nn.Linear(inner_dim, query_dim), nn.Dropout(dropout) )
+
+    def forward_plain(self, x):
+        q = self.to_q(x) # B*N*(H*C)
+        k = self.to_k(x) # B*N*(H*C)
+        v = self.to_v(x) # B*N*(H*C)
+
+        B, N, HC = q.shape 
+        H = self.heads
+        C = HC // H 
+
+        q = q.view(B,N,H,C).permute(0,2,1,3).reshape(B*H,N,C) # (B*H)*N*C
+        k = k.view(B,N,H,C).permute(0,2,1,3).reshape(B*H,N,C) # (B*H)*N*C
+        v = v.view(B,N,H,C).permute(0,2,1,3).reshape(B*H,N,C) # (B*H)*N*C
+
+        sim = torch.einsum('b i c, b j c -> b i j', q, k) * self.scale  # (B*H)*N*N
+        attn = sim.softmax(dim=-1) # (B*H)*N*N
+
+        out = torch.einsum('b i j, b j c -> b i c', attn, v) # (B*H)*N*C
+        out = out.view(B,H,N,C).permute(0,2,1,3).reshape(B,N,(H*C)) # B*N*(H*C)
+
+        return self.to_out(out)
+
+    def forward(self, x, context=None, mask=None):
+        if not XFORMERS_IS_AVAILBLE:
+            return self.forward_plain(x)
+
+        q = self.to_q(x)
+        context = default(context, x)
+        k = self.to_k(context)
+        v = self.to_v(context)
+
+        b, _, _ = q.shape
+        q, k, v = map(
+            lambda t: t.unsqueeze(3)
+            .reshape(b, t.shape[1], self.heads, self.dim_head)
+            .permute(0, 2, 1, 3)
+            .reshape(b * self.heads, t.shape[1], self.dim_head)
+            .contiguous(),
+            (q, k, v),
+        )
+
+        # actually compute the attention, what we cannot get enough of
+        out = xformers.ops.memory_efficient_attention(q, k, v, attn_bias=None, op=None)
+
+        if exists(mask):
+            raise NotImplementedError
+        out = (
+            out.unsqueeze(0)
+            .reshape(b, self.heads, out.shape[1], self.dim_head)
+            .permute(0, 2, 1, 3)
+            .reshape(b, out.shape[1], self.heads * self.dim_head)
+        )
+        return self.to_out(out)
+
+
+class GatedCrossAttentionDense(nn.Module):
+    def __init__(self, query_dim, key_dim, value_dim, n_heads, d_head):
+        super().__init__()
+        
+        self.attn = CrossAttention(query_dim=query_dim, key_dim=key_dim, value_dim=value_dim, heads=n_heads, dim_head=d_head) 
+        self.ff = FeedForward(query_dim, glu=True)
+
+        self.norm1 = nn.LayerNorm(query_dim)
+        self.norm2 = nn.LayerNorm(query_dim)
+
+        self.register_parameter('alpha_attn', nn.Parameter(torch.tensor(0.)) )
+        self.register_parameter('alpha_dense', nn.Parameter(torch.tensor(0.)) )
+
+        # this can be useful: we can externally change magnitude of tanh(alpha)
+        # for example, when it is set to 0, then the entire model is same as original one 
+        self.scale = 1  
+
+    def forward(self, x, objs):
+
+        x = x + self.scale*torch.tanh(self.alpha_attn) * self.attn( self.norm1(x), objs, objs)  
+        x = x + self.scale*torch.tanh(self.alpha_dense) * self.ff( self.norm2(x) ) 
+        
+        return x 
+
+
+class GatedSelfAttentionDense(nn.Module):
+    def __init__(self, query_dim, context_dim,  n_heads, d_head):
+        super().__init__()
+        
+        # we need a linear projection since we need cat visual feature and obj feature
+        self.linear = nn.Linear(context_dim, query_dim)
+
+        self.attn = SelfAttention(query_dim=query_dim, heads=n_heads, dim_head=d_head)
+        self.ff = FeedForward(query_dim, glu=True)
+
+        self.norm1 = nn.LayerNorm(query_dim)
+        self.norm2 = nn.LayerNorm(query_dim)
+
+        self.register_parameter('alpha_attn', nn.Parameter(torch.tensor(0.)) )
+        self.register_parameter('alpha_dense', nn.Parameter(torch.tensor(0.)) )
+
+        # this can be useful: we can externally change magnitude of tanh(alpha)
+        # for example, when it is set to 0, then the entire model is same as original one 
+        self.scale = 1  
+
+
+    def forward(self, x, objs):
+
+        N_visual = x.shape[1]
+        objs = self.linear(objs)
+        
+        x = x + self.scale*torch.tanh(self.alpha_attn) * self.attn(  self.norm1(torch.cat([x,objs],dim=1))  )[:,0:N_visual,:]
+        x = x + self.scale*torch.tanh(self.alpha_dense) * self.ff( self.norm2(x) )  
+        
+        return x 
+
+
+class BasicTransformerBlock(nn.Module):
+    def __init__(self, query_dim, key_dim, value_dim, n_heads, d_head, fuser_type, use_checkpoint=True):
+        super().__init__()
+        self.attn1 = SelfAttention(query_dim=query_dim, heads=n_heads, dim_head=d_head)  
+        self.ff = FeedForward(query_dim, glu=True)
+        self.attn2 = CrossAttention(query_dim=query_dim, key_dim=key_dim, value_dim=value_dim, heads=n_heads, dim_head=d_head)  
+        self.norm1 = nn.LayerNorm(query_dim)
+        self.norm2 = nn.LayerNorm(query_dim)
+        self.norm3 = nn.LayerNorm(query_dim)
+        self.use_checkpoint = use_checkpoint
+
+        if fuser_type == "gatedSA":
+            # note key_dim here actually is context_dim
+            self.fuser = GatedSelfAttentionDense(query_dim, key_dim, n_heads, d_head) 
+        elif fuser_type == "gatedCA":
+            self.fuser = GatedCrossAttentionDense(query_dim, key_dim, value_dim, n_heads, d_head) 
+        else:
+            assert False 
+
+
+    def forward(self, x, context, objs):
+#        return checkpoint(self._forward, (x, context, objs), self.parameters(), self.use_checkpoint)
+        if self.use_checkpoint and x.requires_grad:
+            return checkpoint.checkpoint(self._forward, x, context, objs)
+        else:
+            return self._forward(x, context, objs)
+
+    def _forward(self, x, context, objs): 
+        x = self.attn1( self.norm1(x) ) + x 
+        x = self.fuser(x, objs) # identity mapping in the beginning 
+        x = self.attn2(self.norm2(x), context, context) + x
+        x = self.ff(self.norm3(x)) + x
+        return x
+
+
+class SpatialTransformer(nn.Module):
+    def __init__(self, in_channels, key_dim, value_dim, n_heads, d_head, depth=1, fuser_type=None, use_checkpoint=True):
+        super().__init__()
+        self.in_channels = in_channels
+        query_dim = n_heads * d_head
+        self.norm = Normalize(in_channels)
+
+
+        self.proj_in = nn.Conv2d(in_channels,
+                                 query_dim,
+                                 kernel_size=1,
+                                 stride=1,
+                                 padding=0)
+
+        self.transformer_blocks = nn.ModuleList(
+            [BasicTransformerBlock(query_dim, key_dim, value_dim, n_heads, d_head, fuser_type, use_checkpoint=use_checkpoint)
+                for d in range(depth)]
+        )
+
+        self.proj_out = zero_module(nn.Conv2d(query_dim,
+                                              in_channels,
+                                              kernel_size=1,
+                                              stride=1,
+                                              padding=0))
+
+    def forward(self, x, context, objs):
+        b, c, h, w = x.shape
+        x_in = x
+        x = self.norm(x)
+        x = self.proj_in(x)
+        x = rearrange(x, 'b c h w -> b (h w) c')
+        for block in self.transformer_blocks:
+            x = block(x, context, objs)
+        x = rearrange(x, 'b (h w) c -> b c h w', h=h, w=w)
+        x = self.proj_out(x)
+        return x + x_in

gligen/ldm/modules/diffusionmodules/model.py

@@ -0,0 +1,835 @@
+# pytorch_diffusion + derived encoder decoder
+import math
+import torch
+import torch.nn as nn
+import numpy as np
+from einops import rearrange
+
+from ldm.util import instantiate_from_config
+from ldm.modules.attention import LinearAttention
+
+
+def get_timestep_embedding(timesteps, embedding_dim):
+    """
+    This matches the implementation in Denoising Diffusion Probabilistic Models:
+    From Fairseq.
+    Build sinusoidal embeddings.
+    This matches the implementation in tensor2tensor, but differs slightly
+    from the description in Section 3.5 of "Attention Is All You Need".
+    """
+    assert len(timesteps.shape) == 1
+
+    half_dim = embedding_dim // 2
+    emb = math.log(10000) / (half_dim - 1)
+    emb = torch.exp(torch.arange(half_dim, dtype=torch.float32) * -emb)
+    emb = emb.to(device=timesteps.device)
+    emb = timesteps.float()[:, None] * emb[None, :]
+    emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
+    if embedding_dim % 2 == 1:  # zero pad
+        emb = torch.nn.functional.pad(emb, (0,1,0,0))
+    return emb
+
+
+def nonlinearity(x):
+    # swish
+    return x*torch.sigmoid(x)
+
+
+def Normalize(in_channels, num_groups=32):
+    return torch.nn.GroupNorm(num_groups=num_groups, num_channels=in_channels, eps=1e-6, affine=True)
+
+
+class Upsample(nn.Module):
+    def __init__(self, in_channels, with_conv):
+        super().__init__()
+        self.with_conv = with_conv
+        if self.with_conv:
+            self.conv = torch.nn.Conv2d(in_channels,
+                                        in_channels,
+                                        kernel_size=3,
+                                        stride=1,
+                                        padding=1)
+
+    def forward(self, x):
+        x = torch.nn.functional.interpolate(x, scale_factor=2.0, mode="nearest")
+        if self.with_conv:
+            x = self.conv(x)
+        return x
+
+
+class Downsample(nn.Module):
+    def __init__(self, in_channels, with_conv):
+        super().__init__()
+        self.with_conv = with_conv
+        if self.with_conv:
+            # no asymmetric padding in torch conv, must do it ourselves
+            self.conv = torch.nn.Conv2d(in_channels,
+                                        in_channels,
+                                        kernel_size=3,
+                                        stride=2,
+                                        padding=0)
+
+    def forward(self, x):
+        if self.with_conv:
+            pad = (0,1,0,1)
+            x = torch.nn.functional.pad(x, pad, mode="constant", value=0)
+            x = self.conv(x)
+        else:
+            x = torch.nn.functional.avg_pool2d(x, kernel_size=2, stride=2)
+        return x
+
+
+class ResnetBlock(nn.Module):
+    def __init__(self, *, in_channels, out_channels=None, conv_shortcut=False,
+                 dropout, temb_channels=512):
+        super().__init__()
+        self.in_channels = in_channels
+        out_channels = in_channels if out_channels is None else out_channels
+        self.out_channels = out_channels
+        self.use_conv_shortcut = conv_shortcut
+
+        self.norm1 = Normalize(in_channels)
+        self.conv1 = torch.nn.Conv2d(in_channels,
+                                     out_channels,
+                                     kernel_size=3,
+                                     stride=1,
+                                     padding=1)
+        if temb_channels > 0:
+            self.temb_proj = torch.nn.Linear(temb_channels,
+                                             out_channels)
+        self.norm2 = Normalize(out_channels)
+        self.dropout = torch.nn.Dropout(dropout)
+        self.conv2 = torch.nn.Conv2d(out_channels,
+                                     out_channels,
+                                     kernel_size=3,
+                                     stride=1,
+                                     padding=1)
+        if self.in_channels != self.out_channels:
+            if self.use_conv_shortcut:
+                self.conv_shortcut = torch.nn.Conv2d(in_channels,
+                                                     out_channels,
+                                                     kernel_size=3,
+                                                     stride=1,
+                                                     padding=1)
+            else:
+                self.nin_shortcut = torch.nn.Conv2d(in_channels,
+                                                    out_channels,
+                                                    kernel_size=1,
+                                                    stride=1,
+                                                    padding=0)
+
+    def forward(self, x, temb):
+        h = x
+        h = self.norm1(h)
+        h = nonlinearity(h)
+        h = self.conv1(h)
+
+        if temb is not None:
+            h = h + self.temb_proj(nonlinearity(temb))[:,:,None,None]
+
+        h = self.norm2(h)
+        h = nonlinearity(h)
+        h = self.dropout(h)
+        h = self.conv2(h)
+
+        if self.in_channels != self.out_channels:
+            if self.use_conv_shortcut:
+                x = self.conv_shortcut(x)
+            else:
+                x = self.nin_shortcut(x)
+
+        return x+h
+
+
+class LinAttnBlock(LinearAttention):
+    """to match AttnBlock usage"""
+    def __init__(self, in_channels):
+        super().__init__(dim=in_channels, heads=1, dim_head=in_channels)
+
+
+class AttnBlock(nn.Module):
+    def __init__(self, in_channels):
+        super().__init__()
+        self.in_channels = in_channels
+
+        self.norm = Normalize(in_channels)
+        self.q = torch.nn.Conv2d(in_channels,
+                                 in_channels,
+                                 kernel_size=1,
+                                 stride=1,
+                                 padding=0)
+        self.k = torch.nn.Conv2d(in_channels,
+                                 in_channels,
+                                 kernel_size=1,
+                                 stride=1,
+                                 padding=0)
+        self.v = torch.nn.Conv2d(in_channels,
+                                 in_channels,
+                                 kernel_size=1,
+                                 stride=1,
+                                 padding=0)
+        self.proj_out = torch.nn.Conv2d(in_channels,
+                                        in_channels,
+                                        kernel_size=1,
+                                        stride=1,
+                                        padding=0)
+
+
+    def forward(self, x):
+        h_ = x
+        h_ = self.norm(h_)
+        q = self.q(h_)
+        k = self.k(h_)
+        v = self.v(h_)
+
+        # compute attention
+        b,c,h,w = q.shape
+        q = q.reshape(b,c,h*w)
+        q = q.permute(0,2,1)   # b,hw,c
+        k = k.reshape(b,c,h*w) # b,c,hw
+        w_ = torch.bmm(q,k)     # b,hw,hw    w[b,i,j]=sum_c q[b,i,c]k[b,c,j]
+        w_ = w_ * (int(c)**(-0.5))
+        w_ = torch.nn.functional.softmax(w_, dim=2)
+
+        # attend to values
+        v = v.reshape(b,c,h*w)
+        w_ = w_.permute(0,2,1)   # b,hw,hw (first hw of k, second of q)
+        h_ = torch.bmm(v,w_)     # b, c,hw (hw of q) h_[b,c,j] = sum_i v[b,c,i] w_[b,i,j]
+        h_ = h_.reshape(b,c,h,w)
+
+        h_ = self.proj_out(h_)
+
+        return x+h_
+
+
+def make_attn(in_channels, attn_type="vanilla"):
+    assert attn_type in ["vanilla", "linear", "none"], f'attn_type {attn_type} unknown'
+    print(f"making attention of type '{attn_type}' with {in_channels} in_channels")
+    if attn_type == "vanilla":
+        return AttnBlock(in_channels)
+    elif attn_type == "none":
+        return nn.Identity(in_channels)
+    else:
+        return LinAttnBlock(in_channels)
+
+
+class Model(nn.Module):
+    def __init__(self, *, ch, out_ch, ch_mult=(1,2,4,8), num_res_blocks,
+                 attn_resolutions, dropout=0.0, resamp_with_conv=True, in_channels,
+                 resolution, use_timestep=True, use_linear_attn=False, attn_type="vanilla"):
+        super().__init__()
+        if use_linear_attn: attn_type = "linear"
+        self.ch = ch
+        self.temb_ch = self.ch*4
+        self.num_resolutions = len(ch_mult)
+        self.num_res_blocks = num_res_blocks
+        self.resolution = resolution
+        self.in_channels = in_channels
+
+        self.use_timestep = use_timestep
+        if self.use_timestep:
+            # timestep embedding
+            self.temb = nn.Module()
+            self.temb.dense = nn.ModuleList([
+                torch.nn.Linear(self.ch,
+                                self.temb_ch),
+                torch.nn.Linear(self.temb_ch,
+                                self.temb_ch),
+            ])
+
+        # downsampling
+        self.conv_in = torch.nn.Conv2d(in_channels,
+                                       self.ch,
+                                       kernel_size=3,
+                                       stride=1,
+                                       padding=1)
+
+        curr_res = resolution
+        in_ch_mult = (1,)+tuple(ch_mult)
+        self.down = nn.ModuleList()
+        for i_level in range(self.num_resolutions):
+            block = nn.ModuleList()
+            attn = nn.ModuleList()
+            block_in = ch*in_ch_mult[i_level]
+            block_out = ch*ch_mult[i_level]
+            for i_block in range(self.num_res_blocks):
+                block.append(ResnetBlock(in_channels=block_in,
+                                         out_channels=block_out,
+                                         temb_channels=self.temb_ch,
+                                         dropout=dropout))
+                block_in = block_out
+                if curr_res in attn_resolutions:
+                    attn.append(make_attn(block_in, attn_type=attn_type))
+            down = nn.Module()
+            down.block = block
+            down.attn = attn
+            if i_level != self.num_resolutions-1:
+                down.downsample = Downsample(block_in, resamp_with_conv)
+                curr_res = curr_res // 2
+            self.down.append(down)
+
+        # middle
+        self.mid = nn.Module()
+        self.mid.block_1 = ResnetBlock(in_channels=block_in,
+                                       out_channels=block_in,
+                                       temb_channels=self.temb_ch,
+                                       dropout=dropout)
+        self.mid.attn_1 = make_attn(block_in, attn_type=attn_type)
+        self.mid.block_2 = ResnetBlock(in_channels=block_in,
+                                       out_channels=block_in,
+                                       temb_channels=self.temb_ch,
+                                       dropout=dropout)
+
+        # upsampling
+        self.up = nn.ModuleList()
+        for i_level in reversed(range(self.num_resolutions)):
+            block = nn.ModuleList()
+            attn = nn.ModuleList()
+            block_out = ch*ch_mult[i_level]
+            skip_in = ch*ch_mult[i_level]
+            for i_block in range(self.num_res_blocks+1):
+                if i_block == self.num_res_blocks:
+                    skip_in = ch*in_ch_mult[i_level]
+                block.append(ResnetBlock(in_channels=block_in+skip_in,
+                                         out_channels=block_out,
+                                         temb_channels=self.temb_ch,
+                                         dropout=dropout))
+                block_in = block_out
+                if curr_res in attn_resolutions:
+                    attn.append(make_attn(block_in, attn_type=attn_type))
+            up = nn.Module()
+            up.block = block
+            up.attn = attn
+            if i_level != 0:
+                up.upsample = Upsample(block_in, resamp_with_conv)
+                curr_res = curr_res * 2
+            self.up.insert(0, up) # prepend to get consistent order
+
+        # end
+        self.norm_out = Normalize(block_in)
+        self.conv_out = torch.nn.Conv2d(block_in,
+                                        out_ch,
+                                        kernel_size=3,
+                                        stride=1,
+                                        padding=1)
+
+    def forward(self, x, t=None, context=None):
+        #assert x.shape[2] == x.shape[3] == self.resolution
+        if context is not None:
+            # assume aligned context, cat along channel axis
+            x = torch.cat((x, context), dim=1)
+        if self.use_timestep:
+            # timestep embedding
+            assert t is not None
+            temb = get_timestep_embedding(t, self.ch)
+            temb = self.temb.dense[0](temb)
+            temb = nonlinearity(temb)
+            temb = self.temb.dense[1](temb)
+        else:
+            temb = None
+
+        # downsampling
+        hs = [self.conv_in(x)]
+        for i_level in range(self.num_resolutions):
+            for i_block in range(self.num_res_blocks):
+                h = self.down[i_level].block[i_block](hs[-1], temb)
+                if len(self.down[i_level].attn) > 0:
+                    h = self.down[i_level].attn[i_block](h)
+                hs.append(h)
+            if i_level != self.num_resolutions-1:
+                hs.append(self.down[i_level].downsample(hs[-1]))
+
+        # middle
+        h = hs[-1]
+        h = self.mid.block_1(h, temb)
+        h = self.mid.attn_1(h)
+        h = self.mid.block_2(h, temb)
+
+        # upsampling
+        for i_level in reversed(range(self.num_resolutions)):
+            for i_block in range(self.num_res_blocks+1):
+                h = self.up[i_level].block[i_block](
+                    torch.cat([h, hs.pop()], dim=1), temb)
+                if len(self.up[i_level].attn) > 0:
+                    h = self.up[i_level].attn[i_block](h)
+            if i_level != 0:
+                h = self.up[i_level].upsample(h)
+
+        # end
+        h = self.norm_out(h)
+        h = nonlinearity(h)
+        h = self.conv_out(h)
+        return h
+
+    def get_last_layer(self):
+        return self.conv_out.weight
+
+
+class Encoder(nn.Module):
+    def __init__(self, *, ch, out_ch, ch_mult=(1,2,4,8), num_res_blocks,
+                 attn_resolutions, dropout=0.0, resamp_with_conv=True, in_channels,
+                 resolution, z_channels, double_z=True, use_linear_attn=False, attn_type="vanilla",
+                 **ignore_kwargs):
+        super().__init__()
+        if use_linear_attn: attn_type = "linear"
+        self.ch = ch
+        self.temb_ch = 0
+        self.num_resolutions = len(ch_mult)
+        self.num_res_blocks = num_res_blocks
+        self.resolution = resolution
+        self.in_channels = in_channels
+
+        # downsampling
+        self.conv_in = torch.nn.Conv2d(in_channels,
+                                       self.ch,
+                                       kernel_size=3,
+                                       stride=1,
+                                       padding=1)
+
+        curr_res = resolution
+        in_ch_mult = (1,)+tuple(ch_mult)
+        self.in_ch_mult = in_ch_mult
+        self.down = nn.ModuleList()
+        for i_level in range(self.num_resolutions):
+            block = nn.ModuleList()
+            attn = nn.ModuleList()
+            block_in = ch*in_ch_mult[i_level]
+            block_out = ch*ch_mult[i_level]
+            for i_block in range(self.num_res_blocks):
+                block.append(ResnetBlock(in_channels=block_in,
+                                         out_channels=block_out,
+                                         temb_channels=self.temb_ch,
+                                         dropout=dropout))
+                block_in = block_out
+                if curr_res in attn_resolutions:
+                    attn.append(make_attn(block_in, attn_type=attn_type))
+            down = nn.Module()
+            down.block = block
+            down.attn = attn
+            if i_level != self.num_resolutions-1:
+                down.downsample = Downsample(block_in, resamp_with_conv)
+                curr_res = curr_res // 2
+            self.down.append(down)
+
+        # middle
+        self.mid = nn.Module()
+        self.mid.block_1 = ResnetBlock(in_channels=block_in,
+                                       out_channels=block_in,
+                                       temb_channels=self.temb_ch,
+                                       dropout=dropout)
+        self.mid.attn_1 = make_attn(block_in, attn_type=attn_type)
+        self.mid.block_2 = ResnetBlock(in_channels=block_in,
+                                       out_channels=block_in,
+                                       temb_channels=self.temb_ch,
+                                       dropout=dropout)
+
+        # end
+        self.norm_out = Normalize(block_in)
+        self.conv_out = torch.nn.Conv2d(block_in,
+                                        2*z_channels if double_z else z_channels,
+                                        kernel_size=3,
+                                        stride=1,
+                                        padding=1)
+
+    def forward(self, x):
+        # timestep embedding
+        temb = None
+
+        # downsampling
+        hs = [self.conv_in(x)]
+        for i_level in range(self.num_resolutions):
+            for i_block in range(self.num_res_blocks):
+                h = self.down[i_level].block[i_block](hs[-1], temb)
+                if len(self.down[i_level].attn) > 0:
+                    h = self.down[i_level].attn[i_block](h)
+                hs.append(h)
+            if i_level != self.num_resolutions-1:
+                hs.append(self.down[i_level].downsample(hs[-1]))
+
+        # middle
+        h = hs[-1]
+        h = self.mid.block_1(h, temb)
+        h = self.mid.attn_1(h)
+        h = self.mid.block_2(h, temb)
+
+        # end
+        h = self.norm_out(h)
+        h = nonlinearity(h)
+        h = self.conv_out(h)
+        return h
+
+
+class Decoder(nn.Module):
+    def __init__(self, *, ch, out_ch, ch_mult=(1,2,4,8), num_res_blocks,
+                 attn_resolutions, dropout=0.0, resamp_with_conv=True, in_channels,
+                 resolution, z_channels, give_pre_end=False, tanh_out=False, use_linear_attn=False,
+                 attn_type="vanilla", **ignorekwargs):
+        super().__init__()
+        if use_linear_attn: attn_type = "linear"
+        self.ch = ch
+        self.temb_ch = 0
+        self.num_resolutions = len(ch_mult)
+        self.num_res_blocks = num_res_blocks
+        self.resolution = resolution
+        self.in_channels = in_channels
+        self.give_pre_end = give_pre_end
+        self.tanh_out = tanh_out
+
+        # compute in_ch_mult, block_in and curr_res at lowest res
+        in_ch_mult = (1,)+tuple(ch_mult)
+        block_in = ch*ch_mult[self.num_resolutions-1]
+        curr_res = resolution // 2**(self.num_resolutions-1)
+        self.z_shape = (1,z_channels,curr_res,curr_res)
+        print("Working with z of shape {} = {} dimensions.".format(
+            self.z_shape, np.prod(self.z_shape)))
+
+        # z to block_in
+        self.conv_in = torch.nn.Conv2d(z_channels,
+                                       block_in,
+                                       kernel_size=3,
+                                       stride=1,
+                                       padding=1)
+
+        # middle
+        self.mid = nn.Module()
+        self.mid.block_1 = ResnetBlock(in_channels=block_in,
+                                       out_channels=block_in,
+                                       temb_channels=self.temb_ch,
+                                       dropout=dropout)
+        self.mid.attn_1 = make_attn(block_in, attn_type=attn_type)
+        self.mid.block_2 = ResnetBlock(in_channels=block_in,
+                                       out_channels=block_in,
+                                       temb_channels=self.temb_ch,
+                                       dropout=dropout)
+
+        # upsampling
+        self.up = nn.ModuleList()
+        for i_level in reversed(range(self.num_resolutions)):
+            block = nn.ModuleList()
+            attn = nn.ModuleList()
+            block_out = ch*ch_mult[i_level]
+            for i_block in range(self.num_res_blocks+1):
+                block.append(ResnetBlock(in_channels=block_in,
+                                         out_channels=block_out,
+                                         temb_channels=self.temb_ch,
+                                         dropout=dropout))
+                block_in = block_out
+                if curr_res in attn_resolutions:
+                    attn.append(make_attn(block_in, attn_type=attn_type))
+            up = nn.Module()
+            up.block = block
+            up.attn = attn
+            if i_level != 0:
+                up.upsample = Upsample(block_in, resamp_with_conv)
+                curr_res = curr_res * 2
+            self.up.insert(0, up) # prepend to get consistent order
+
+        # end
+        self.norm_out = Normalize(block_in)
+        self.conv_out = torch.nn.Conv2d(block_in,
+                                        out_ch,
+                                        kernel_size=3,
+                                        stride=1,
+                                        padding=1)
+
+    def forward(self, z):
+        #assert z.shape[1:] == self.z_shape[1:]
+        self.last_z_shape = z.shape
+
+        # timestep embedding
+        temb = None
+
+        # z to block_in
+        h = self.conv_in(z)
+
+        # middle
+        h = self.mid.block_1(h, temb)
+        h = self.mid.attn_1(h)
+        h = self.mid.block_2(h, temb)
+
+        # upsampling
+        for i_level in reversed(range(self.num_resolutions)):
+            for i_block in range(self.num_res_blocks+1):
+                h = self.up[i_level].block[i_block](h, temb)
+                if len(self.up[i_level].attn) > 0:
+                    h = self.up[i_level].attn[i_block](h)
+            if i_level != 0:
+                h = self.up[i_level].upsample(h)
+
+        # end
+        if self.give_pre_end:
+            return h
+
+        h = self.norm_out(h)
+        h = nonlinearity(h)
+        h = self.conv_out(h)
+        if self.tanh_out:
+            h = torch.tanh(h)
+        return h
+
+
+class SimpleDecoder(nn.Module):
+    def __init__(self, in_channels, out_channels, *args, **kwargs):
+        super().__init__()
+        self.model = nn.ModuleList([nn.Conv2d(in_channels, in_channels, 1),
+                                     ResnetBlock(in_channels=in_channels,
+                                                 out_channels=2 * in_channels,
+                                                 temb_channels=0, dropout=0.0),
+                                     ResnetBlock(in_channels=2 * in_channels,
+                                                out_channels=4 * in_channels,
+                                                temb_channels=0, dropout=0.0),
+                                     ResnetBlock(in_channels=4 * in_channels,
+                                                out_channels=2 * in_channels,
+                                                temb_channels=0, dropout=0.0),
+                                     nn.Conv2d(2*in_channels, in_channels, 1),
+                                     Upsample(in_channels, with_conv=True)])
+        # end
+        self.norm_out = Normalize(in_channels)
+        self.conv_out = torch.nn.Conv2d(in_channels,
+                                        out_channels,
+                                        kernel_size=3,
+                                        stride=1,
+                                        padding=1)
+
+    def forward(self, x):
+        for i, layer in enumerate(self.model):
+            if i in [1,2,3]:
+                x = layer(x, None)
+            else:
+                x = layer(x)
+
+        h = self.norm_out(x)
+        h = nonlinearity(h)
+        x = self.conv_out(h)
+        return x
+
+
+class UpsampleDecoder(nn.Module):
+    def __init__(self, in_channels, out_channels, ch, num_res_blocks, resolution,
+                 ch_mult=(2,2), dropout=0.0):
+        super().__init__()
+        # upsampling
+        self.temb_ch = 0
+        self.num_resolutions = len(ch_mult)
+        self.num_res_blocks = num_res_blocks
+        block_in = in_channels
+        curr_res = resolution // 2 ** (self.num_resolutions - 1)
+        self.res_blocks = nn.ModuleList()
+        self.upsample_blocks = nn.ModuleList()
+        for i_level in range(self.num_resolutions):
+            res_block = []
+            block_out = ch * ch_mult[i_level]
+            for i_block in range(self.num_res_blocks + 1):
+                res_block.append(ResnetBlock(in_channels=block_in,
+                                         out_channels=block_out,
+                                         temb_channels=self.temb_ch,
+                                         dropout=dropout))
+                block_in = block_out
+            self.res_blocks.append(nn.ModuleList(res_block))
+            if i_level != self.num_resolutions - 1:
+                self.upsample_blocks.append(Upsample(block_in, True))
+                curr_res = curr_res * 2
+
+        # end
+        self.norm_out = Normalize(block_in)
+        self.conv_out = torch.nn.Conv2d(block_in,
+                                        out_channels,
+                                        kernel_size=3,
+                                        stride=1,
+                                        padding=1)
+
+    def forward(self, x):
+        # upsampling
+        h = x
+        for k, i_level in enumerate(range(self.num_resolutions)):
+            for i_block in range(self.num_res_blocks + 1):
+                h = self.res_blocks[i_level][i_block](h, None)
+            if i_level != self.num_resolutions - 1:
+                h = self.upsample_blocks[k](h)
+        h = self.norm_out(h)
+        h = nonlinearity(h)
+        h = self.conv_out(h)
+        return h
+
+
+class LatentRescaler(nn.Module):
+    def __init__(self, factor, in_channels, mid_channels, out_channels, depth=2):
+        super().__init__()
+        # residual block, interpolate, residual block
+        self.factor = factor
+        self.conv_in = nn.Conv2d(in_channels,
+                                 mid_channels,
+                                 kernel_size=3,
+                                 stride=1,
+                                 padding=1)
+        self.res_block1 = nn.ModuleList([ResnetBlock(in_channels=mid_channels,
+                                                     out_channels=mid_channels,
+                                                     temb_channels=0,
+                                                     dropout=0.0) for _ in range(depth)])
+        self.attn = AttnBlock(mid_channels)
+        self.res_block2 = nn.ModuleList([ResnetBlock(in_channels=mid_channels,
+                                                     out_channels=mid_channels,
+                                                     temb_channels=0,
+                                                     dropout=0.0) for _ in range(depth)])
+
+        self.conv_out = nn.Conv2d(mid_channels,
+                                  out_channels,
+                                  kernel_size=1,
+                                  )
+
+    def forward(self, x):
+        x = self.conv_in(x)
+        for block in self.res_block1:
+            x = block(x, None)
+        x = torch.nn.functional.interpolate(x, size=(int(round(x.shape[2]*self.factor)), int(round(x.shape[3]*self.factor))))
+        x = self.attn(x)
+        for block in self.res_block2:
+            x = block(x, None)
+        x = self.conv_out(x)
+        return x
+
+
+class MergedRescaleEncoder(nn.Module):
+    def __init__(self, in_channels, ch, resolution, out_ch, num_res_blocks,
+                 attn_resolutions, dropout=0.0, resamp_with_conv=True,
+                 ch_mult=(1,2,4,8), rescale_factor=1.0, rescale_module_depth=1):
+        super().__init__()
+        intermediate_chn = ch * ch_mult[-1]
+        self.encoder = Encoder(in_channels=in_channels, num_res_blocks=num_res_blocks, ch=ch, ch_mult=ch_mult,
+                               z_channels=intermediate_chn, double_z=False, resolution=resolution,
+                               attn_resolutions=attn_resolutions, dropout=dropout, resamp_with_conv=resamp_with_conv,
+                               out_ch=None)
+        self.rescaler = LatentRescaler(factor=rescale_factor, in_channels=intermediate_chn,
+                                       mid_channels=intermediate_chn, out_channels=out_ch, depth=rescale_module_depth)
+
+    def forward(self, x):
+        x = self.encoder(x)
+        x = self.rescaler(x)
+        return x
+
+
+class MergedRescaleDecoder(nn.Module):
+    def __init__(self, z_channels, out_ch, resolution, num_res_blocks, attn_resolutions, ch, ch_mult=(1,2,4,8),
+                 dropout=0.0, resamp_with_conv=True, rescale_factor=1.0, rescale_module_depth=1):
+        super().__init__()
+        tmp_chn = z_channels*ch_mult[-1]
+        self.decoder = Decoder(out_ch=out_ch, z_channels=tmp_chn, attn_resolutions=attn_resolutions, dropout=dropout,
+                               resamp_with_conv=resamp_with_conv, in_channels=None, num_res_blocks=num_res_blocks,
+                               ch_mult=ch_mult, resolution=resolution, ch=ch)
+        self.rescaler = LatentRescaler(factor=rescale_factor, in_channels=z_channels, mid_channels=tmp_chn,
+                                       out_channels=tmp_chn, depth=rescale_module_depth)
+
+    def forward(self, x):
+        x = self.rescaler(x)
+        x = self.decoder(x)
+        return x
+
+
+class Upsampler(nn.Module):
+    def __init__(self, in_size, out_size, in_channels, out_channels, ch_mult=2):
+        super().__init__()
+        assert out_size >= in_size
+        num_blocks = int(np.log2(out_size//in_size))+1
+        factor_up = 1.+ (out_size % in_size)
+        print(f"Building {self.__class__.__name__} with in_size: {in_size} --> out_size {out_size} and factor {factor_up}")
+        self.rescaler = LatentRescaler(factor=factor_up, in_channels=in_channels, mid_channels=2*in_channels,
+                                       out_channels=in_channels)
+        self.decoder = Decoder(out_ch=out_channels, resolution=out_size, z_channels=in_channels, num_res_blocks=2,
+                               attn_resolutions=[], in_channels=None, ch=in_channels,
+                               ch_mult=[ch_mult for _ in range(num_blocks)])
+
+    def forward(self, x):
+        x = self.rescaler(x)
+        x = self.decoder(x)
+        return x
+
+
+class Resize(nn.Module):
+    def __init__(self, in_channels=None, learned=False, mode="bilinear"):
+        super().__init__()
+        self.with_conv = learned
+        self.mode = mode
+        if self.with_conv:
+            print(f"Note: {self.__class__.__name} uses learned downsampling and will ignore the fixed {mode} mode")
+            raise NotImplementedError()
+            assert in_channels is not None
+            # no asymmetric padding in torch conv, must do it ourselves
+            self.conv = torch.nn.Conv2d(in_channels,
+                                        in_channels,
+                                        kernel_size=4,
+                                        stride=2,
+                                        padding=1)
+
+    def forward(self, x, scale_factor=1.0):
+        if scale_factor==1.0:
+            return x
+        else:
+            x = torch.nn.functional.interpolate(x, mode=self.mode, align_corners=False, scale_factor=scale_factor)
+        return x
+
+class FirstStagePostProcessor(nn.Module):
+
+    def __init__(self, ch_mult:list, in_channels,
+                 pretrained_model:nn.Module=None,
+                 reshape=False,
+                 n_channels=None,
+                 dropout=0.,
+                 pretrained_config=None):
+        super().__init__()
+        if pretrained_config is None:
+            assert pretrained_model is not None, 'Either "pretrained_model" or "pretrained_config" must not be None'
+            self.pretrained_model = pretrained_model
+        else:
+            assert pretrained_config is not None, 'Either "pretrained_model" or "pretrained_config" must not be None'
+            self.instantiate_pretrained(pretrained_config)
+
+        self.do_reshape = reshape
+
+        if n_channels is None:
+            n_channels = self.pretrained_model.encoder.ch
+
+        self.proj_norm = Normalize(in_channels,num_groups=in_channels//2)
+        self.proj = nn.Conv2d(in_channels,n_channels,kernel_size=3,
+                            stride=1,padding=1)
+
+        blocks = []
+        downs = []
+        ch_in = n_channels
+        for m in ch_mult:
+            blocks.append(ResnetBlock(in_channels=ch_in,out_channels=m*n_channels,dropout=dropout))
+            ch_in = m * n_channels
+            downs.append(Downsample(ch_in, with_conv=False))
+
+        self.model = nn.ModuleList(blocks)
+        self.downsampler = nn.ModuleList(downs)
+
+
+    def instantiate_pretrained(self, config):
+        model = instantiate_from_config(config)
+        self.pretrained_model = model.eval()
+        # self.pretrained_model.train = False
+        for param in self.pretrained_model.parameters():
+            param.requires_grad = False
+
+
+    @torch.no_grad()
+    def encode_with_pretrained(self,x):
+        c = self.pretrained_model.encode(x)
+        if isinstance(c, DiagonalGaussianDistribution):
+            c = c.mode()
+        return  c
+
+    def forward(self,x):
+        z_fs = self.encode_with_pretrained(x)
+        z = self.proj_norm(z_fs)
+        z = self.proj(z)
+        z = nonlinearity(z)
+
+        for submodel, downmodel in zip(self.model,self.downsampler):
+            z = submodel(z,temb=None)
+            z = downmodel(z)
+
+        if self.do_reshape:
+            z = rearrange(z,'b c h w -> b (h w) c')
+        return z
+

gligen/ldm/modules/diffusionmodules/openaimodel.py

@@ -0,0 +1,489 @@
+from abc import abstractmethod
+from functools import partial
+import math
+
+import numpy as np
+import random
+import torch as th
+import torch.nn as nn
+import torch.nn.functional as F
+
+from ldm.modules.diffusionmodules.util import (
+    conv_nd,
+    linear,
+    avg_pool_nd,
+    zero_module,
+    normalization,
+    timestep_embedding,
+)
+from ldm.modules.attention import SpatialTransformer
+from torch.utils import checkpoint
+
+class TimestepBlock(nn.Module):
+    """
+    Any module where forward() takes timestep embeddings as a second argument.
+    """
+
+    @abstractmethod
+    def forward(self, x, emb):
+        """
+        Apply the module to `x` given `emb` timestep embeddings.
+        """
+
+
+class TimestepEmbedSequential(nn.Sequential, TimestepBlock):
+    """
+    A sequential module that passes timestep embeddings to the children that
+    support it as an extra input.
+    """
+
+    def forward(self, x, emb, context, objs):
+        for layer in self:
+            if isinstance(layer, TimestepBlock):
+                x = layer(x, emb)
+            elif isinstance(layer, SpatialTransformer):
+                x = layer(x, context, objs)
+            else:
+                x = layer(x)
+        return x
+
+
+class Upsample(nn.Module):
+    """
+    An upsampling layer with an optional convolution.
+    :param channels: channels in the inputs and outputs.
+    :param use_conv: a bool determining if a convolution is applied.
+    :param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then
+                 upsampling occurs in the inner-two dimensions.
+    """
+
+    def __init__(self, channels, use_conv, dims=2, out_channels=None, padding=1):
+        super().__init__()
+        self.channels = channels
+        self.out_channels = out_channels or channels
+        self.use_conv = use_conv
+        self.dims = dims
+        if use_conv:
+            self.conv = conv_nd(dims, self.channels, self.out_channels, 3, padding=padding)
+
+    def forward(self, x):
+        assert x.shape[1] == self.channels
+        if self.dims == 3:
+            x = F.interpolate(
+                x, (x.shape[2], x.shape[3] * 2, x.shape[4] * 2), mode="nearest"
+            )
+        else:
+            x = F.interpolate(x, scale_factor=2, mode="nearest")
+        if self.use_conv:
+            x = self.conv(x)
+        return x
+
+
+
+
+class Downsample(nn.Module):
+    """
+    A downsampling layer with an optional convolution.
+    :param channels: channels in the inputs and outputs.
+    :param use_conv: a bool determining if a convolution is applied.
+    :param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then
+                 downsampling occurs in the inner-two dimensions.
+    """
+
+    def __init__(self, channels, use_conv, dims=2, out_channels=None,padding=1):
+        super().__init__()
+        self.channels = channels
+        self.out_channels = out_channels or channels
+        self.use_conv = use_conv
+        self.dims = dims
+        stride = 2 if dims != 3 else (1, 2, 2)
+        if use_conv:
+            self.op = conv_nd(
+                dims, self.channels, self.out_channels, 3, stride=stride, padding=padding
+            )
+        else:
+            assert self.channels == self.out_channels
+            self.op = avg_pool_nd(dims, kernel_size=stride, stride=stride)
+
+    def forward(self, x):
+        assert x.shape[1] == self.channels
+        return self.op(x)
+
+
+class ResBlock(TimestepBlock):
+    """
+    A residual block that can optionally change the number of channels.
+    :param channels: the number of input channels.
+    :param emb_channels: the number of timestep embedding channels.
+    :param dropout: the rate of dropout.
+    :param out_channels: if specified, the number of out channels.
+    :param use_conv: if True and out_channels is specified, use a spatial
+        convolution instead of a smaller 1x1 convolution to change the
+        channels in the skip connection.
+    :param dims: determines if the signal is 1D, 2D, or 3D.
+    :param use_checkpoint: if True, use gradient checkpointing on this module.
+    :param up: if True, use this block for upsampling.
+    :param down: if True, use this block for downsampling.
+    """
+
+    def __init__(
+        self,
+        channels,
+        emb_channels,
+        dropout,
+        out_channels=None,
+        use_conv=False,
+        use_scale_shift_norm=False,
+        dims=2,
+        use_checkpoint=False,
+        up=False,
+        down=False,
+    ):
+        super().__init__()
+        self.channels = channels
+        self.emb_channels = emb_channels
+        self.dropout = dropout
+        self.out_channels = out_channels or channels
+        self.use_conv = use_conv
+        self.use_checkpoint = use_checkpoint
+        self.use_scale_shift_norm = use_scale_shift_norm
+
+        self.in_layers = nn.Sequential(
+            normalization(channels),
+            nn.SiLU(),
+            conv_nd(dims, channels, self.out_channels, 3, padding=1),
+        )
+
+        self.updown = up or down
+
+        if up:
+            self.h_upd = Upsample(channels, False, dims)
+            self.x_upd = Upsample(channels, False, dims)
+        elif down:
+            self.h_upd = Downsample(channels, False, dims)
+            self.x_upd = Downsample(channels, False, dims)
+        else:
+            self.h_upd = self.x_upd = nn.Identity()
+
+        self.emb_layers = nn.Sequential(
+            nn.SiLU(),
+            linear(
+                emb_channels,
+                2 * self.out_channels if use_scale_shift_norm else self.out_channels,
+            ),
+        )
+        self.out_layers = nn.Sequential(
+            normalization(self.out_channels),
+            nn.SiLU(),
+            nn.Dropout(p=dropout),
+            zero_module(
+                conv_nd(dims, self.out_channels, self.out_channels, 3, padding=1)
+            ),
+        )
+
+        if self.out_channels == channels:
+            self.skip_connection = nn.Identity()
+        elif use_conv:
+            self.skip_connection = conv_nd(
+                dims, channels, self.out_channels, 3, padding=1
+            )
+        else:
+            self.skip_connection = conv_nd(dims, channels, self.out_channels, 1)
+
+    def forward(self, x, emb):
+        """
+        Apply the block to a Tensor, conditioned on a timestep embedding.
+        :param x: an [N x C x ...] Tensor of features.
+        :param emb: an [N x emb_channels] Tensor of timestep embeddings.
+        :return: an [N x C x ...] Tensor of outputs.
+        """
+        # return checkpoint(
+        #     self._forward, (x, emb), self.parameters(), self.use_checkpoint
+        # )
+        if self.use_checkpoint and x.requires_grad:
+            return checkpoint.checkpoint(self._forward, x, emb )
+        else:
+            return self._forward(x, emb) 
+
+
+    def _forward(self, x, emb):
+        if self.updown:
+            in_rest, in_conv = self.in_layers[:-1], self.in_layers[-1]
+            h = in_rest(x)
+            h = self.h_upd(h)
+            x = self.x_upd(x)
+            h = in_conv(h)
+        else:
+            h = self.in_layers(x)
+        emb_out = self.emb_layers(emb).type(h.dtype)
+        while len(emb_out.shape) < len(h.shape):
+            emb_out = emb_out[..., None]
+        if self.use_scale_shift_norm:
+            out_norm, out_rest = self.out_layers[0], self.out_layers[1:]
+            scale, shift = th.chunk(emb_out, 2, dim=1)
+            h = out_norm(h) * (1 + scale) + shift
+            h = out_rest(h)
+        else:
+            h = h + emb_out
+            h = self.out_layers(h)
+        return self.skip_connection(x) + h
+
+
+
+
+class UNetModel(nn.Module):
+    def __init__(
+        self,
+        image_size,
+        in_channels,
+        model_channels,
+        out_channels,
+        num_res_blocks,
+        attention_resolutions,
+        dropout=0,
+        channel_mult=(1, 2, 4, 8),
+        conv_resample=True,
+        dims=2,
+        use_checkpoint=False,
+        num_heads=8,
+        use_scale_shift_norm=False,
+        transformer_depth=1,          
+        positive_len = 768, # this is pre-processing embedding len for each 'obj/box'    
+        context_dim=None,  
+        fuser_type = None,    
+        is_inpaint = False,
+        is_style = False,           
+    ):
+        super().__init__()
+        
+        self.image_size = image_size
+        self.in_channels = in_channels
+        self.model_channels = model_channels
+        self.out_channels = out_channels
+        self.num_res_blocks = num_res_blocks
+        self.attention_resolutions = attention_resolutions
+        self.dropout = dropout
+        self.channel_mult = channel_mult
+        self.conv_resample = conv_resample
+        self.use_checkpoint = use_checkpoint
+        self.num_heads = num_heads
+        self.positive_len = positive_len
+        self.context_dim = context_dim
+        self.fuser_type = fuser_type
+        self.is_inpaint = is_inpaint
+        self.is_style = is_style
+        self.use_o2 = False # This will be turned into True by externally if use o2 durining training
+        assert fuser_type in ["gatedSA", "gatedCA"]
+
+
+        time_embed_dim = model_channels * 4
+        self.time_embed = nn.Sequential(
+            linear(model_channels, time_embed_dim),
+            nn.SiLU(),
+            linear(time_embed_dim, time_embed_dim),
+        )
+
+
+        total_in_channels = in_channels+in_channels+1 if self.is_inpaint else in_channels
+        self.input_blocks = nn.ModuleList([TimestepEmbedSequential(conv_nd(dims, total_in_channels, model_channels, 3, padding=1))])
+        
+        input_block_chans = [model_channels]
+        ch = model_channels
+        ds = 1
+        
+        # = = = = = = = = = = = = = = = = = = = = Down Branch = = = = = = = = = = = = = = = = = = = = #
+        for level, mult in enumerate(channel_mult):
+            for _ in range(num_res_blocks):
+                layers = [ ResBlock(ch,
+                                    time_embed_dim,
+                                    dropout,
+                                    out_channels=mult * model_channels,
+                                    dims=dims,
+                                    use_checkpoint=use_checkpoint,
+                                    use_scale_shift_norm=use_scale_shift_norm,) ]
+
+                ch = mult * model_channels
+                if ds in attention_resolutions:
+                    dim_head = ch // num_heads
+                    layers.append(SpatialTransformer(ch, key_dim=context_dim, value_dim=context_dim, n_heads=num_heads, d_head=dim_head, depth=transformer_depth, fuser_type=fuser_type, use_checkpoint=use_checkpoint))
+                
+                self.input_blocks.append(TimestepEmbedSequential(*layers))
+                input_block_chans.append(ch)
+
+            if level != len(channel_mult) - 1: # will not go to this downsample branch in the last feature
+                out_ch = ch
+                self.input_blocks.append( TimestepEmbedSequential( Downsample(ch, conv_resample, dims=dims, out_channels=out_ch ) ) )
+                ch = out_ch
+                input_block_chans.append(ch)
+                ds *= 2
+        dim_head = ch // num_heads
+
+        # self.input_blocks = [ C |  RT  RT  D  |  RT  RT  D  |  RT  RT  D  |   R  R   ]
+
+
+        # = = = = = = = = = = = = = = = = = = = = BottleNeck = = = = = = = = = = = = = = = = = = = = #
+        
+        self.middle_block = TimestepEmbedSequential(
+            ResBlock(ch,
+                     time_embed_dim,
+                     dropout,
+                     dims=dims,
+                     use_checkpoint=use_checkpoint,
+                     use_scale_shift_norm=use_scale_shift_norm),
+            SpatialTransformer(ch, key_dim=context_dim, value_dim=context_dim, n_heads=num_heads, d_head=dim_head, depth=transformer_depth, fuser_type=fuser_type, use_checkpoint=use_checkpoint),
+            ResBlock(ch,
+                     time_embed_dim,
+                     dropout,
+                     dims=dims,
+                     use_checkpoint=use_checkpoint,
+                     use_scale_shift_norm=use_scale_shift_norm))
+
+
+
+        # = = = = = = = = = = = = = = = = = = = = Up Branch = = = = = = = = = = = = = = = = = = = = #
+
+        
+        self.output_blocks = nn.ModuleList([])
+        for level, mult in list(enumerate(channel_mult))[::-1]:
+            for i in range(num_res_blocks + 1):
+                ich = input_block_chans.pop()
+                layers = [ ResBlock(ch + ich,
+                                    time_embed_dim,
+                                    dropout,
+                                    out_channels=model_channels * mult,
+                                    dims=dims,
+                                    use_checkpoint=use_checkpoint,
+                                    use_scale_shift_norm=use_scale_shift_norm) ]
+                ch = model_channels * mult
+                
+                if ds in attention_resolutions:
+                    dim_head = ch // num_heads
+                    layers.append( SpatialTransformer(ch, key_dim=context_dim, value_dim=context_dim, n_heads=num_heads, d_head=dim_head, depth=transformer_depth, fuser_type=fuser_type, use_checkpoint=use_checkpoint) )
+                if level and i == num_res_blocks:
+                    out_ch = ch
+                    layers.append( Upsample(ch, conv_resample, dims=dims, out_channels=out_ch) )
+                    ds //= 2
+                
+                self.output_blocks.append(TimestepEmbedSequential(*layers))
+
+
+        # self.output_blocks = [ R  R  RU | RT  RT  RTU |  RT  RT  RTU  |  RT  RT  RT  ]
+
+
+        self.out = nn.Sequential(
+            normalization(ch),
+            nn.SiLU(),
+            zero_module(conv_nd(dims, model_channels, out_channels, 3, padding=1)),
+        )
+
+        if self.is_style:
+            from .positionnet_with_image  import PositionNet
+        else:
+            from .positionnet  import PositionNet
+        self.position_net = PositionNet(positive_len=positive_len, out_dim=context_dim)
+        
+
+
+
+    def forward_position_net(self,input):
+        if ("boxes" in input):
+            boxes, masks, text_embeddings = input["boxes"], input["masks"], input["text_embeddings"]
+            _ , self.max_box, _ = text_embeddings.shape
+        else: 
+            dtype = input["x"].dtype
+            batch = input["x"].shape[0]
+            device = input["x"].device
+            boxes = th.zeros(batch, self.max_box, 4,).type(dtype).to(device) 
+            masks = th.zeros(batch, self.max_box).type(dtype).to(device) 
+            text_embeddings = th.zeros(batch, self.max_box, self.positive_len).type(dtype).to(device) 
+        if self.training and random.random() < 0.1: # random drop for guidance  
+            boxes, masks, text_embeddings = boxes*0, masks*0, text_embeddings*0
+  
+        objs = self.position_net( boxes, masks, text_embeddings ) # B*N*C 
+
+        return objs
+
+
+    
+
+
+    def forward_position_net_with_image(self,input):
+
+        if ("boxes" in input):
+            boxes = input["boxes"] 
+            masks = input["masks"]
+            text_masks = input["text_masks"]
+            image_masks = input["image_masks"]
+            text_embeddings = input["text_embeddings"]
+            image_embeddings = input["image_embeddings"]
+            _ , self.max_box, _ = text_embeddings.shape
+        else: 
+            dtype = input["x"].dtype
+            batch = input["x"].shape[0]
+            device = input["x"].device
+            boxes = th.zeros(batch, self.max_box, 4,).type(dtype).to(device) 
+            masks = th.zeros(batch, self.max_box).type(dtype).to(device)
+            text_masks = th.zeros(batch, self.max_box).type(dtype).to(device) 
+            image_masks = th.zeros(batch, self.max_box).type(dtype).to(device) 
+            text_embeddings =  th.zeros(batch, self.max_box, self.positive_len).type(dtype).to(device) 
+            image_embeddings = th.zeros(batch, self.max_box, self.positive_len).type(dtype).to(device) 
+        
+        if self.training and random.random() < 0.1: # random drop for guidance  
+            boxes = boxes*0
+            masks = masks*0
+            text_masks = text_masks*0
+            image_masks = image_masks*0
+            text_embeddings = text_embeddings*0
+            image_embeddings = image_embeddings*0
+  
+        objs = self.position_net( boxes, masks, text_masks, image_masks, text_embeddings, image_embeddings ) # B*N*C 
+        
+        return objs
+
+
+
+
+
+    def forward(self, input):
+
+        if self.is_style:
+            objs = self.forward_position_net_with_image(input)
+        else:
+            objs = self.forward_position_net(input)
+
+        
+        hs = []
+
+        t_emb = timestep_embedding(input["timesteps"], self.model_channels, repeat_only=False)
+        if self.use_o2:
+            t_emb = t_emb.to(th.float16)  # not sure why apex will not cast this 
+        emb = self.time_embed(t_emb)
+
+
+        h = input["x"]
+        if self.is_inpaint:
+            h = th.cat( [h, input["inpainting_extra_input"]], dim=1 )
+        context = input["context"]
+        
+
+        for module in self.input_blocks:
+            h = module(h, emb, context, objs)
+            hs.append(h)
+
+        h = self.middle_block(h, emb, context, objs)
+
+        for module in self.output_blocks:
+            h = th.cat([h, hs.pop()], dim=1)
+            h = module(h, emb, context, objs)
+
+        return self.out(h)
+
+
+
+
+
+
+
+
+
+

gligen/ldm/modules/diffusionmodules/positionnet.py

@@ -0,0 +1,50 @@
+import torch
+import torch.nn as nn
+from ldm.modules.attention import BasicTransformerBlock
+from ldm.modules.diffusionmodules.util import checkpoint, FourierEmbedder
+import torch.nn.functional as F
+
+
+
+class PositionNet(nn.Module):
+    def __init__(self,  positive_len, out_dim, fourier_freqs=8):
+        super().__init__()
+        self.positive_len = positive_len
+        self.out_dim = out_dim 
+
+        self.fourier_embedder = FourierEmbedder(num_freqs=fourier_freqs)
+        self.position_dim = fourier_freqs*2*4 # 2 is sin&cos, 4 is xyxy 
+
+        self.linears = nn.Sequential(
+            nn.Linear( self.positive_len + self.position_dim, 512),
+            nn.SiLU(),
+            nn.Linear( 512, 512),
+            nn.SiLU(),
+            nn.Linear(512, out_dim),
+        )
+        
+        self.null_positive_feature = torch.nn.Parameter(torch.zeros([self.positive_len]))
+        self.null_position_feature = torch.nn.Parameter(torch.zeros([self.position_dim]))
+  
+
+    def forward(self, boxes, masks, positive_embeddings):
+        B, N, _ = boxes.shape 
+        masks = masks.unsqueeze(-1)
+
+        # embedding position (it may includes padding as placeholder)
+        xyxy_embedding = self.fourier_embedder(boxes) # B*N*4 --> B*N*C
+
+        # learnable null embedding 
+        positive_null = self.null_positive_feature.view(1,1,-1)
+        xyxy_null =  self.null_position_feature.view(1,1,-1)
+
+        # replace padding with learnable null embedding 
+        positive_embeddings = positive_embeddings*masks + (1-masks)*positive_null
+        xyxy_embedding = xyxy_embedding*masks + (1-masks)*xyxy_null
+
+        objs = self.linears(  torch.cat([positive_embeddings, xyxy_embedding], dim=-1)  )
+        assert objs.shape == torch.Size([B,N,self.out_dim])        
+        return objs
+
+
+

gligen/ldm/modules/diffusionmodules/positionnet_with_image.py

@@ -0,0 +1,68 @@
+import torch
+import torch.nn as nn
+from ldm.modules.attention import BasicTransformerBlock
+from ldm.modules.diffusionmodules.util import checkpoint, FourierEmbedder
+import torch.nn.functional as F
+
+
+
+class PositionNet(nn.Module):
+    def __init__(self, positive_len, out_dim, fourier_freqs=8):
+        super().__init__()
+        self.positive_len = positive_len
+        self.out_dim = out_dim 
+
+        self.fourier_embedder = FourierEmbedder(num_freqs=fourier_freqs)
+        self.position_dim = fourier_freqs*2*4 # 2 is sin&cos, 4 is xyxy 
+
+        # -------------------------------------------------------------- #
+        self.linears_text = nn.Sequential(
+            nn.Linear( self.positive_len + self.position_dim, 512),
+            nn.SiLU(),
+            nn.Linear( 512, 512),
+            nn.SiLU(),
+            nn.Linear(512, out_dim),
+        )
+
+        self.linears_image = nn.Sequential(
+            nn.Linear( self.positive_len + self.position_dim, 512),
+            nn.SiLU(),
+            nn.Linear( 512, 512),
+            nn.SiLU(),
+            nn.Linear(512, out_dim),
+        )
+        
+        # -------------------------------------------------------------- #
+        self.null_text_feature = torch.nn.Parameter(torch.zeros([self.positive_len]))
+        self.null_image_feature = torch.nn.Parameter(torch.zeros([self.positive_len]))
+        self.null_position_feature = torch.nn.Parameter(torch.zeros([self.position_dim]))
+  
+
+    def forward(self, boxes, masks, text_masks, image_masks, text_embeddings, image_embeddings):
+        B, N, _ = boxes.shape 
+        masks = masks.unsqueeze(-1) # B*N*1 
+        text_masks = text_masks.unsqueeze(-1) # B*N*1 
+        image_masks = image_masks.unsqueeze(-1) # B*N*1
+        
+        # embedding position (it may includes padding as placeholder)
+        xyxy_embedding = self.fourier_embedder(boxes) # B*N*4 --> B*N*C
+
+        # learnable null embedding 
+        text_null  = self.null_text_feature.view(1,1,-1) # 1*1*C
+        image_null = self.null_image_feature.view(1,1,-1) # 1*1*C
+        xyxy_null  = self.null_position_feature.view(1,1,-1) # 1*1*C
+
+        # replace padding with learnable null embedding 
+        text_embeddings  = text_embeddings*text_masks  + (1-text_masks)*text_null
+        image_embeddings = image_embeddings*image_masks + (1-image_masks)*image_null
+        xyxy_embedding = xyxy_embedding*masks + (1-masks)*xyxy_null
+
+        objs_text  = self.linears_text(  torch.cat([text_embeddings, xyxy_embedding], dim=-1)  )
+        objs_image = self.linears_image( torch.cat([image_embeddings,xyxy_embedding], dim=-1)  )
+        objs = torch.cat( [objs_text,objs_image], dim=1 )
+
+        assert objs.shape == torch.Size([B,N*2,self.out_dim])        
+        return objs
+
+
+

gligen/ldm/modules/diffusionmodules/util.py

@@ -0,0 +1,277 @@
+import os
+import math
+import torch
+import torch.nn as nn
+import numpy as np
+from einops import repeat
+
+from ldm.util import instantiate_from_config
+
+
+
+class FourierEmbedder():
+    def __init__(self, num_freqs=64, temperature=100):
+
+        self.num_freqs = num_freqs
+        self.temperature = temperature
+        self.freq_bands = temperature ** ( torch.arange(num_freqs) / num_freqs )  
+
+    @ torch.no_grad()
+    def __call__(self, x, cat_dim=-1):
+        "x: arbitrary shape of tensor. dim: cat dim"
+        out = []
+        for freq in self.freq_bands:
+            out.append( torch.sin( freq*x ) )
+            out.append( torch.cos( freq*x ) )
+        return torch.cat(out, cat_dim)
+
+
+
+def make_beta_schedule(schedule, n_timestep, linear_start=1e-4, linear_end=2e-2, cosine_s=8e-3):
+    if schedule == "linear":
+        betas = (
+                torch.linspace(linear_start ** 0.5, linear_end ** 0.5, n_timestep, dtype=torch.float64) ** 2
+        )
+
+    elif schedule == "cosine":
+        timesteps = (
+                torch.arange(n_timestep + 1, dtype=torch.float64) / n_timestep + cosine_s
+        )
+        alphas = timesteps / (1 + cosine_s) * np.pi / 2
+        alphas = torch.cos(alphas).pow(2)
+        alphas = alphas / alphas[0]
+        betas = 1 - alphas[1:] / alphas[:-1]
+        betas = np.clip(betas, a_min=0, a_max=0.999)
+
+    elif schedule == "sqrt_linear":
+        betas = torch.linspace(linear_start, linear_end, n_timestep, dtype=torch.float64)
+    elif schedule == "sqrt":
+        betas = torch.linspace(linear_start, linear_end, n_timestep, dtype=torch.float64) ** 0.5
+    else:
+        raise ValueError(f"schedule '{schedule}' unknown.")
+    return betas.numpy()
+
+
+def make_ddim_timesteps(ddim_discr_method, num_ddim_timesteps, num_ddpm_timesteps, verbose=True):
+    if ddim_discr_method == 'uniform':
+        c = num_ddpm_timesteps // num_ddim_timesteps
+        ddim_timesteps = np.asarray(list(range(0, num_ddpm_timesteps, c)))
+    elif ddim_discr_method == 'quad':
+        ddim_timesteps = ((np.linspace(0, np.sqrt(num_ddpm_timesteps * .8), num_ddim_timesteps)) ** 2).astype(int)
+    else:
+        raise NotImplementedError(f'There is no ddim discretization method called "{ddim_discr_method}"')
+
+    # assert ddim_timesteps.shape[0] == num_ddim_timesteps
+    # add one to get the final alpha values right (the ones from first scale to data during sampling)
+    steps_out = ddim_timesteps + 1
+    if verbose:
+        print(f'Selected timesteps for ddim sampler: {steps_out}')
+    return steps_out
+
+
+def make_ddim_sampling_parameters(alphacums, ddim_timesteps, eta, verbose=True):
+    # select alphas for computing the variance schedule
+    alphas = alphacums[ddim_timesteps]
+    alphas_prev = np.asarray([alphacums[0]] + alphacums[ddim_timesteps[:-1]].tolist())
+
+    # according the the formula provided in https://arxiv.org/abs/2010.02502
+    sigmas = eta * np.sqrt((1 - alphas_prev) / (1 - alphas) * (1 - alphas / alphas_prev))
+    if verbose:
+        print(f'Selected alphas for ddim sampler: a_t: {alphas}; a_(t-1): {alphas_prev}')
+        print(f'For the chosen value of eta, which is {eta}, '
+              f'this results in the following sigma_t schedule for ddim sampler {sigmas}')
+    return sigmas, alphas, alphas_prev
+
+
+def betas_for_alpha_bar(num_diffusion_timesteps, alpha_bar, max_beta=0.999):
+    """
+    Create a beta schedule that discretizes the given alpha_t_bar function,
+    which defines the cumulative product of (1-beta) over time from t = [0,1].
+    :param num_diffusion_timesteps: the number of betas to produce.
+    :param alpha_bar: a lambda that takes an argument t from 0 to 1 and
+                      produces the cumulative product of (1-beta) up to that
+                      part of the diffusion process.
+    :param max_beta: the maximum beta to use; use values lower than 1 to
+                     prevent singularities.
+    """
+    betas = []
+    for i in range(num_diffusion_timesteps):
+        t1 = i / num_diffusion_timesteps
+        t2 = (i + 1) / num_diffusion_timesteps
+        betas.append(min(1 - alpha_bar(t2) / alpha_bar(t1), max_beta))
+    return np.array(betas)
+
+
+def extract_into_tensor(a, t, x_shape):
+    b, *_ = t.shape
+    out = a.gather(-1, t)
+    return out.reshape(b, *((1,) * (len(x_shape) - 1)))
+
+
+def checkpoint(func, inputs, params, flag):
+    """
+    Evaluate a function without caching intermediate activations, allowing for
+    reduced memory at the expense of extra compute in the backward pass.
+    :param func: the function to evaluate.
+    :param inputs: the argument sequence to pass to `func`.
+    :param params: a sequence of parameters `func` depends on but does not
+                   explicitly take as arguments.
+    :param flag: if False, disable gradient checkpointing.
+    """
+    if flag:
+        args = tuple(inputs) + tuple(params)
+        return CheckpointFunction.apply(func, len(inputs), *args)
+    else:
+        return func(*inputs)
+
+
+class CheckpointFunction(torch.autograd.Function):
+    @staticmethod
+    def forward(ctx, run_function, length, *args):
+        ctx.run_function = run_function
+        ctx.input_tensors = list(args[:length])
+        ctx.input_params = list(args[length:])
+
+        with torch.no_grad():
+            output_tensors = ctx.run_function(*ctx.input_tensors)
+        return output_tensors
+
+    @staticmethod
+    def backward(ctx, *output_grads):
+        ctx.input_tensors = [x.detach().requires_grad_(True) for x in ctx.input_tensors]
+        with torch.enable_grad():
+            # Fixes a bug where the first op in run_function modifies the
+            # Tensor storage in place, which is not allowed for detach()'d
+            # Tensors.
+            shallow_copies = [x.view_as(x) for x in ctx.input_tensors]
+            output_tensors = ctx.run_function(*shallow_copies)
+        input_grads = torch.autograd.grad(
+            output_tensors,
+            ctx.input_tensors + ctx.input_params,
+            output_grads,
+            allow_unused=True,
+        )
+        del ctx.input_tensors
+        del ctx.input_params
+        del output_tensors
+        return (None, None) + input_grads
+
+
+def timestep_embedding(timesteps, dim, max_period=10000, repeat_only=False):
+    """
+    Create sinusoidal timestep embeddings.
+    :param timesteps: a 1-D Tensor of N indices, one per batch element.
+                      These may be fractional.
+    :param dim: the dimension of the output.
+    :param max_period: controls the minimum frequency of the embeddings.
+    :return: an [N x dim] Tensor of positional embeddings.
+    """
+    if not repeat_only:
+        half = dim // 2
+        freqs = torch.exp(
+            -math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half
+        ).to(device=timesteps.device)
+        args = timesteps[:, None].float() * freqs[None]
+        embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
+        if dim % 2:
+            embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
+    else:
+        embedding = repeat(timesteps, 'b -> b d', d=dim)
+    return embedding
+
+
+def zero_module(module):
+    """
+    Zero out the parameters of a module and return it.
+    """
+    for p in module.parameters():
+        p.detach().zero_()
+    return module
+
+
+def scale_module(module, scale):
+    """
+    Scale the parameters of a module and return it.
+    """
+    for p in module.parameters():
+        p.detach().mul_(scale)
+    return module
+
+
+def mean_flat(tensor):
+    """
+    Take the mean over all non-batch dimensions.
+    """
+    return tensor.mean(dim=list(range(1, len(tensor.shape))))
+
+
+def normalization(channels):
+    """
+    Make a standard normalization layer.
+    :param channels: number of input channels.
+    :return: an nn.Module for normalization.
+    """
+    return GroupNorm32(32, channels)
+
+
+# PyTorch 1.7 has SiLU, but we support PyTorch 1.5.
+class SiLU(nn.Module):
+    def forward(self, x):
+        return x * torch.sigmoid(x)
+
+
+class GroupNorm32(nn.GroupNorm):
+    def forward(self, x):
+        return super().forward(x.float()).type(x.dtype)
+        #return super().forward(x).type(x.dtype)
+
+def conv_nd(dims, *args, **kwargs):
+    """
+    Create a 1D, 2D, or 3D convolution module.
+    """
+    if dims == 1:
+        return nn.Conv1d(*args, **kwargs)
+    elif dims == 2:
+        return nn.Conv2d(*args, **kwargs)
+    elif dims == 3:
+        return nn.Conv3d(*args, **kwargs)
+    raise ValueError(f"unsupported dimensions: {dims}")
+
+
+def linear(*args, **kwargs):
+    """
+    Create a linear module.
+    """
+    return nn.Linear(*args, **kwargs)
+
+
+def avg_pool_nd(dims, *args, **kwargs):
+    """
+    Create a 1D, 2D, or 3D average pooling module.
+    """
+    if dims == 1:
+        return nn.AvgPool1d(*args, **kwargs)
+    elif dims == 2:
+        return nn.AvgPool2d(*args, **kwargs)
+    elif dims == 3:
+        return nn.AvgPool3d(*args, **kwargs)
+    raise ValueError(f"unsupported dimensions: {dims}")
+
+
+class HybridConditioner(nn.Module):
+
+    def __init__(self, c_concat_config, c_crossattn_config):
+        super().__init__()
+        self.concat_conditioner = instantiate_from_config(c_concat_config)
+        self.crossattn_conditioner = instantiate_from_config(c_crossattn_config)
+
+    def forward(self, c_concat, c_crossattn):
+        c_concat = self.concat_conditioner(c_concat)
+        c_crossattn = self.crossattn_conditioner(c_crossattn)
+        return {'c_concat': [c_concat], 'c_crossattn': [c_crossattn]}
+
+
+def noise_like(shape, device, repeat=False):
+    repeat_noise = lambda: torch.randn((1, *shape[1:]), device=device).repeat(shape[0], *((1,) * (len(shape) - 1)))
+    noise = lambda: torch.randn(shape, device=device)
+    return repeat_noise() if repeat else noise()

gligen/ldm/modules/distributions/distributions.py

@@ -0,0 +1,92 @@
+import torch
+import numpy as np
+
+
+class AbstractDistribution:
+    def sample(self):
+        raise NotImplementedError()
+
+    def mode(self):
+        raise NotImplementedError()
+
+
+class DiracDistribution(AbstractDistribution):
+    def __init__(self, value):
+        self.value = value
+
+    def sample(self):
+        return self.value
+
+    def mode(self):
+        return self.value
+
+
+class DiagonalGaussianDistribution(object):
+    def __init__(self, parameters, deterministic=False):
+        self.parameters = parameters
+        self.mean, self.logvar = torch.chunk(parameters, 2, dim=1)
+        self.logvar = torch.clamp(self.logvar, -30.0, 20.0)
+        self.deterministic = deterministic
+        self.std = torch.exp(0.5 * self.logvar)
+        self.var = torch.exp(self.logvar)
+        if self.deterministic:
+            self.var = self.std = torch.zeros_like(self.mean).to(device=self.parameters.device)
+
+    def sample(self):
+        x = self.mean + self.std * torch.randn(self.mean.shape).to(device=self.parameters.device)
+        return x
+
+    def kl(self, other=None):
+        if self.deterministic:
+            return torch.Tensor([0.])
+        else:
+            if other is None:
+                return 0.5 * torch.sum(torch.pow(self.mean, 2)
+                                       + self.var - 1.0 - self.logvar,
+                                       dim=[1, 2, 3])
+            else:
+                return 0.5 * torch.sum(
+                    torch.pow(self.mean - other.mean, 2) / other.var
+                    + self.var / other.var - 1.0 - self.logvar + other.logvar,
+                    dim=[1, 2, 3])
+
+    def nll(self, sample, dims=[1,2,3]):
+        if self.deterministic:
+            return torch.Tensor([0.])
+        logtwopi = np.log(2.0 * np.pi)
+        return 0.5 * torch.sum(
+            logtwopi + self.logvar + torch.pow(sample - self.mean, 2) / self.var,
+            dim=dims)
+
+    def mode(self):
+        return self.mean
+
+
+def normal_kl(mean1, logvar1, mean2, logvar2):
+    """
+    source: https://github.com/openai/guided-diffusion/blob/27c20a8fab9cb472df5d6bdd6c8d11c8f430b924/guided_diffusion/losses.py#L12
+    Compute the KL divergence between two gaussians.
+    Shapes are automatically broadcasted, so batches can be compared to
+    scalars, among other use cases.
+    """
+    tensor = None
+    for obj in (mean1, logvar1, mean2, logvar2):
+        if isinstance(obj, torch.Tensor):
+            tensor = obj
+            break
+    assert tensor is not None, "at least one argument must be a Tensor"
+
+    # Force variances to be Tensors. Broadcasting helps convert scalars to
+    # Tensors, but it does not work for torch.exp().
+    logvar1, logvar2 = [
+        x if isinstance(x, torch.Tensor) else torch.tensor(x).to(tensor)
+        for x in (logvar1, logvar2)
+    ]
+
+    return 0.5 * (
+        -1.0
+        + logvar2
+        - logvar1
+        + torch.exp(logvar1 - logvar2)
+        + ((mean1 - mean2) ** 2) * torch.exp(-logvar2)
+    )

gligen/ldm/modules/ema.py

@@ -0,0 +1,76 @@
+import torch
+from torch import nn
+
+
+class LitEma(nn.Module):
+    def __init__(self, model, decay=0.9999, use_num_upates=True):
+        super().__init__()
+        if decay < 0.0 or decay > 1.0:
+            raise ValueError('Decay must be between 0 and 1')
+
+        self.m_name2s_name = {}
+        self.register_buffer('decay', torch.tensor(decay, dtype=torch.float32))
+        self.register_buffer('num_updates', torch.tensor(0,dtype=torch.int) if use_num_upates
+                             else torch.tensor(-1,dtype=torch.int))
+
+        for name, p in model.named_parameters():
+            if p.requires_grad:
+                #remove as '.'-character is not allowed in buffers
+                s_name = name.replace('.','')
+                self.m_name2s_name.update({name:s_name})
+                self.register_buffer(s_name,p.clone().detach().data)
+
+        self.collected_params = []
+
+    def forward(self,model):
+        decay = self.decay
+
+        if self.num_updates >= 0:
+            self.num_updates += 1
+            decay = min(self.decay,(1 + self.num_updates) / (10 + self.num_updates))
+
+        one_minus_decay = 1.0 - decay
+
+        with torch.no_grad():
+            m_param = dict(model.named_parameters())
+            shadow_params = dict(self.named_buffers())
+
+            for key in m_param:
+                if m_param[key].requires_grad:
+                    sname = self.m_name2s_name[key]
+                    shadow_params[sname] = shadow_params[sname].type_as(m_param[key])
+                    shadow_params[sname].sub_(one_minus_decay * (shadow_params[sname] - m_param[key]))
+                else:
+                    assert not key in self.m_name2s_name
+
+    def copy_to(self, model):
+        m_param = dict(model.named_parameters())
+        shadow_params = dict(self.named_buffers())
+        for key in m_param:
+            if m_param[key].requires_grad:
+                m_param[key].data.copy_(shadow_params[self.m_name2s_name[key]].data)
+            else:
+                assert not key in self.m_name2s_name
+
+    def store(self, parameters):
+        """
+        Save the current parameters for restoring later.
+        Args:
+          parameters: Iterable of `torch.nn.Parameter`; the parameters to be
+            temporarily stored.
+        """
+        self.collected_params = [param.clone() for param in parameters]
+
+    def restore(self, parameters):
+        """
+        Restore the parameters stored with the `store` method.
+        Useful to validate the model with EMA parameters without affecting the
+        original optimization process. Store the parameters before the
+        `copy_to` method. After validation (or model saving), use this to
+        restore the former parameters.
+        Args:
+          parameters: Iterable of `torch.nn.Parameter`; the parameters to be
+            updated with the stored parameters.
+        """
+        for c_param, param in zip(self.collected_params, parameters):
+            param.data.copy_(c_param.data)

gligen/ldm/modules/encoders/modules.py

@@ -0,0 +1,245 @@
+import torch
+import torch.nn as nn
+from functools import partial
+import clip
+from einops import rearrange, repeat
+from transformers import CLIPTokenizer, CLIPTextModel
+import kornia
+
+from ldm.modules.x_transformer import Encoder, TransformerWrapper  # TODO: can we directly rely on lucidrains code and simply add this as a reuirement? --> test
+
+
+class AbstractEncoder(nn.Module):
+    def __init__(self):
+        super().__init__()
+
+    def encode(self, *args, **kwargs):
+        raise NotImplementedError
+
+
+
+class ClassEmbedder(nn.Module):
+    def __init__(self, embed_dim, n_classes=1000, key='class'):
+        super().__init__()
+        self.key = key
+        self.embedding = nn.Embedding(n_classes, embed_dim)
+
+    def forward(self, batch, key=None):
+        if key is None:
+            key = self.key
+        # this is for use in crossattn
+        c = batch[key][:, None]
+        c = self.embedding(c)
+        return c
+
+
+class TransformerEmbedder(AbstractEncoder):
+    """Some transformer encoder layers"""
+    def __init__(self, n_embed, n_layer, vocab_size, max_seq_len=77, device="cuda"):
+        super().__init__()
+        self.device = device
+        self.transformer = TransformerWrapper(num_tokens=vocab_size, max_seq_len=max_seq_len,
+                                              attn_layers=Encoder(dim=n_embed, depth=n_layer))
+
+    def forward(self, tokens):
+        tokens = tokens.to(self.device)  # meh
+        z = self.transformer(tokens, return_embeddings=True)
+        return z
+
+    def encode(self, x):
+        return self(x)
+
+
+class BERTTokenizer(AbstractEncoder):
+    """ Uses a pretrained BERT tokenizer by huggingface. Vocab size: 30522 (?)"""
+    def __init__(self, device="cuda", vq_interface=True, max_length=77):
+        super().__init__()
+        from transformers import BertTokenizerFast  # TODO: add to reuquirements
+        self.tokenizer = BertTokenizerFast.from_pretrained("bert-base-uncased")
+        self.device = device
+        self.vq_interface = vq_interface
+        self.max_length = max_length
+
+    def forward(self, text):
+        batch_encoding = self.tokenizer(text, truncation=True, max_length=self.max_length, return_length=True,
+                                        return_overflowing_tokens=False, padding="max_length", return_tensors="pt",
+                                        return_offsets_mapping=True)
+        tokens = batch_encoding["input_ids"].to(self.device)
+        offset_mapping = batch_encoding["offset_mapping"]
+        return tokens, offset_mapping
+
+    @torch.no_grad()
+    def encode(self, text):
+        tokens = self(text)
+        if not self.vq_interface:
+            return tokens
+        return None, None, [None, None, tokens]
+
+    def decode(self, text):
+        return text
+
+
+class BERTEmbedder(AbstractEncoder):
+    """Uses the BERT tokenizr model and add some transformer encoder layers"""
+    def __init__(self, n_embed, n_layer, vocab_size=30522, max_seq_len=77,
+                 device="cuda",use_tokenizer=True, embedding_dropout=0.0):
+        super().__init__()
+        self.use_tknz_fn = use_tokenizer
+        if self.use_tknz_fn:
+            self.tknz_fn = BERTTokenizer(vq_interface=False, max_length=max_seq_len)
+        self.device = device
+        self.transformer = TransformerWrapper(num_tokens=vocab_size, max_seq_len=max_seq_len,
+                                              attn_layers=Encoder(dim=n_embed, depth=n_layer),
+                                              emb_dropout=embedding_dropout)
+
+    def forward(self, text, return_offset_mapping=False):
+        if self.use_tknz_fn:
+            tokens, offset_mapping = self.tknz_fn(text)#.to(self.device)
+        else:
+            assert False 
+            tokens = text
+        z = self.transformer(tokens, return_embeddings=True)
+
+        if return_offset_mapping:
+            return z, offset_mapping
+        else:
+            return z 
+
+    def encode(self, text, return_offset_mapping=False):
+        # output of length 77
+        return self(text, return_offset_mapping)
+
+
+class SpatialRescaler(nn.Module):
+    def __init__(self,
+                 n_stages=1,
+                 method='bilinear',
+                 multiplier=0.5,
+                 in_channels=3,
+                 out_channels=None,
+                 bias=False):
+        super().__init__()
+        self.n_stages = n_stages
+        assert self.n_stages >= 0
+        assert method in ['nearest','linear','bilinear','trilinear','bicubic','area']
+        self.multiplier = multiplier
+        self.interpolator = partial(torch.nn.functional.interpolate, mode=method)
+        self.remap_output = out_channels is not None
+        if self.remap_output:
+            print(f'Spatial Rescaler mapping from {in_channels} to {out_channels} channels after resizing.')
+            self.channel_mapper = nn.Conv2d(in_channels,out_channels,1,bias=bias)
+
+    def forward(self,x):
+        for stage in range(self.n_stages):
+            x = self.interpolator(x, scale_factor=self.multiplier)
+
+
+        if self.remap_output:
+            x = self.channel_mapper(x)
+        return x
+
+    def encode(self, x):
+        return self(x)
+
+class FrozenCLIPEmbedder(AbstractEncoder):
+    """Uses the CLIP transformer encoder for text (from Hugging Face)"""
+    def __init__(self, version="openai/clip-vit-large-patch14", device="cuda", max_length=77):
+        super().__init__()
+        self.tokenizer = CLIPTokenizer.from_pretrained(version)
+        self.transformer = CLIPTextModel.from_pretrained(version)
+        self.device = device
+        self.max_length = max_length
+        self.freeze()
+
+    def freeze(self):
+        self.transformer = self.transformer.eval()
+        for param in self.parameters():
+            param.requires_grad = False
+
+    def forward(self, text, return_pooler_output=False):
+        batch_encoding = self.tokenizer(text, truncation=True, max_length=self.max_length, return_length=True,
+                                        return_overflowing_tokens=False, padding="max_length", return_tensors="pt")
+        tokens = batch_encoding["input_ids"].to(self.device)
+        outputs = self.transformer(input_ids=tokens)
+
+        z = outputs.last_hidden_state
+        
+        if not return_pooler_output:
+            return z
+        else:
+            return z, outputs.pooler_output
+
+    def encode(self, text, return_pooler_output=False):
+        return self(text, return_pooler_output)
+
+
+class FrozenCLIPTextEmbedder(nn.Module):
+    """
+    Uses the CLIP transformer encoder for text.
+    """
+    def __init__(self, version='ViT-L/14', device="cuda", max_length=77, n_repeat=1, normalize=True):
+        super().__init__()
+        self.model, _ = clip.load(version, jit=False, device="cpu")
+        self.device = device
+        self.max_length = max_length
+        self.n_repeat = n_repeat
+        self.normalize = normalize
+
+    def freeze(self):
+        self.model = self.model.eval()
+        for param in self.parameters():
+            param.requires_grad = False
+
+    def forward(self, text):
+        tokens = clip.tokenize(text).to(self.device)
+        z = self.model.encode_text(tokens)
+        if self.normalize:
+            z = z / torch.linalg.norm(z, dim=1, keepdim=True)
+        return z
+
+    def encode(self, text):
+        z = self(text)
+        if z.ndim==2:
+            z = z[:, None, :]
+        z = repeat(z, 'b 1 d -> b k d', k=self.n_repeat)
+        return z
+
+
+class FrozenClipImageEmbedder(nn.Module):
+    """
+        Uses the CLIP image encoder.
+        """
+    def __init__(
+            self,
+            model,
+            jit=False,
+            device='cuda' if torch.cuda.is_available() else 'cpu',
+            antialias=False,
+        ):
+        super().__init__()
+        self.model, _ = clip.load(name=model, device=device, jit=jit)
+
+        self.antialias = antialias
+
+        self.register_buffer('mean', torch.Tensor([0.48145466, 0.4578275, 0.40821073]), persistent=False)
+        self.register_buffer('std', torch.Tensor([0.26862954, 0.26130258, 0.27577711]), persistent=False)
+
+    def preprocess(self, x):
+        # normalize to [0,1]
+        x = kornia.geometry.resize(x, (224, 224),
+                                   interpolation='bicubic',align_corners=True,
+                                   antialias=self.antialias)
+        x = (x + 1.) / 2.
+        # renormalize according to clip
+        x = kornia.enhance.normalize(x, self.mean, self.std)
+        return x
+
+    def forward(self, x):
+        # x is assumed to be in range [-1,1]
+        return self.model.encode_image(self.preprocess(x))
+
+
+if __name__ == "__main__":
+    from ldm.util import count_params
+    model = FrozenCLIPEmbedder()
+    count_params(model, verbose=True)

gligen/ldm/modules/encoders/modules_backup.py

@@ -0,0 +1,234 @@
+import torch
+import torch.nn as nn
+from functools import partial
+import clip
+from einops import rearrange, repeat
+from transformers import CLIPTokenizer, CLIPTextModel
+import kornia
+
+from ldm.modules.x_transformer import Encoder, TransformerWrapper  # TODO: can we directly rely on lucidrains code and simply add this as a reuirement? --> test
+
+
+class AbstractEncoder(nn.Module):
+    def __init__(self):
+        super().__init__()
+
+    def encode(self, *args, **kwargs):
+        raise NotImplementedError
+
+
+
+class ClassEmbedder(nn.Module):
+    def __init__(self, embed_dim, n_classes=1000, key='class'):
+        super().__init__()
+        self.key = key
+        self.embedding = nn.Embedding(n_classes, embed_dim)
+
+    def forward(self, batch, key=None):
+        if key is None:
+            key = self.key
+        # this is for use in crossattn
+        c = batch[key][:, None]
+        c = self.embedding(c)
+        return c
+
+
+class TransformerEmbedder(AbstractEncoder):
+    """Some transformer encoder layers"""
+    def __init__(self, n_embed, n_layer, vocab_size, max_seq_len=77, device="cuda"):
+        super().__init__()
+        self.device = device
+        self.transformer = TransformerWrapper(num_tokens=vocab_size, max_seq_len=max_seq_len,
+                                              attn_layers=Encoder(dim=n_embed, depth=n_layer))
+
+    def forward(self, tokens):
+        tokens = tokens.to(self.device)  # meh
+        z = self.transformer(tokens, return_embeddings=True)
+        return z
+
+    def encode(self, x):
+        return self(x)
+
+
+class BERTTokenizer(AbstractEncoder):
+    """ Uses a pretrained BERT tokenizer by huggingface. Vocab size: 30522 (?)"""
+    def __init__(self, device="cuda", vq_interface=True, max_length=77):
+        super().__init__()
+        from transformers import BertTokenizerFast  # TODO: add to reuquirements
+        self.tokenizer = BertTokenizerFast.from_pretrained("bert-base-uncased")
+        self.device = device
+        self.vq_interface = vq_interface
+        self.max_length = max_length
+
+    def forward(self, text):
+        batch_encoding = self.tokenizer(text, truncation=True, max_length=self.max_length, return_length=True,
+                                        return_overflowing_tokens=False, padding="max_length", return_tensors="pt")
+        tokens = batch_encoding["input_ids"].to(self.device)
+        return tokens
+
+    @torch.no_grad()
+    def encode(self, text):
+        tokens = self(text)
+        if not self.vq_interface:
+            return tokens
+        return None, None, [None, None, tokens]
+
+    def decode(self, text):
+        return text
+
+
+class BERTEmbedder(AbstractEncoder):
+    """Uses the BERT tokenizr model and add some transformer encoder layers"""
+    def __init__(self, n_embed, n_layer, vocab_size=30522, max_seq_len=77,
+                 device="cuda",use_tokenizer=True, embedding_dropout=0.0):
+        super().__init__()
+        self.use_tknz_fn = use_tokenizer
+        if self.use_tknz_fn:
+            self.tknz_fn = BERTTokenizer(vq_interface=False, max_length=max_seq_len)
+        self.device = device
+        self.transformer = TransformerWrapper(num_tokens=vocab_size, max_seq_len=max_seq_len,
+                                              attn_layers=Encoder(dim=n_embed, depth=n_layer),
+                                              emb_dropout=embedding_dropout)
+
+    def forward(self, text):
+        if self.use_tknz_fn:
+            tokens = self.tknz_fn(text)#.to(self.device)
+        else:
+            tokens = text
+        z = self.transformer(tokens, return_embeddings=True)
+        return z
+
+    def encode(self, text):
+        # output of length 77
+        return self(text)
+
+
+class SpatialRescaler(nn.Module):
+    def __init__(self,
+                 n_stages=1,
+                 method='bilinear',
+                 multiplier=0.5,
+                 in_channels=3,
+                 out_channels=None,
+                 bias=False):
+        super().__init__()
+        self.n_stages = n_stages
+        assert self.n_stages >= 0
+        assert method in ['nearest','linear','bilinear','trilinear','bicubic','area']
+        self.multiplier = multiplier
+        self.interpolator = partial(torch.nn.functional.interpolate, mode=method)
+        self.remap_output = out_channels is not None
+        if self.remap_output:
+            print(f'Spatial Rescaler mapping from {in_channels} to {out_channels} channels after resizing.')
+            self.channel_mapper = nn.Conv2d(in_channels,out_channels,1,bias=bias)
+
+    def forward(self,x):
+        for stage in range(self.n_stages):
+            x = self.interpolator(x, scale_factor=self.multiplier)
+
+
+        if self.remap_output:
+            x = self.channel_mapper(x)
+        return x
+
+    def encode(self, x):
+        return self(x)
+
+class FrozenCLIPEmbedder(AbstractEncoder):
+    """Uses the CLIP transformer encoder for text (from Hugging Face)"""
+    def __init__(self, version="openai/clip-vit-large-patch14", device="cuda", max_length=77):
+        super().__init__()
+        self.tokenizer = CLIPTokenizer.from_pretrained(version)
+        self.transformer = CLIPTextModel.from_pretrained(version)
+        self.device = device
+        self.max_length = max_length
+        self.freeze()
+
+    def freeze(self):
+        self.transformer = self.transformer.eval()
+        for param in self.parameters():
+            param.requires_grad = False
+
+    def forward(self, text):
+        batch_encoding = self.tokenizer(text, truncation=True, max_length=self.max_length, return_length=True,
+                                        return_overflowing_tokens=False, padding="max_length", return_tensors="pt")
+        tokens = batch_encoding["input_ids"].to(self.device)
+        outputs = self.transformer(input_ids=tokens)
+
+        z = outputs.last_hidden_state
+        return z
+
+    def encode(self, text):
+        return self(text)
+
+
+class FrozenCLIPTextEmbedder(nn.Module):
+    """
+    Uses the CLIP transformer encoder for text.
+    """
+    def __init__(self, version='ViT-L/14', device="cuda", max_length=77, n_repeat=1, normalize=True):
+        super().__init__()
+        self.model, _ = clip.load(version, jit=False, device="cpu")
+        self.device = device
+        self.max_length = max_length
+        self.n_repeat = n_repeat
+        self.normalize = normalize
+
+    def freeze(self):
+        self.model = self.model.eval()
+        for param in self.parameters():
+            param.requires_grad = False
+
+    def forward(self, text):
+        tokens = clip.tokenize(text).to(self.device)
+        z = self.model.encode_text(tokens)
+        if self.normalize:
+            z = z / torch.linalg.norm(z, dim=1, keepdim=True)
+        return z
+
+    def encode(self, text):
+        z = self(text)
+        if z.ndim==2:
+            z = z[:, None, :]
+        z = repeat(z, 'b 1 d -> b k d', k=self.n_repeat)
+        return z
+
+
+class FrozenClipImageEmbedder(nn.Module):
+    """
+        Uses the CLIP image encoder.
+        """
+    def __init__(
+            self,
+            model,
+            jit=False,
+            device='cuda' if torch.cuda.is_available() else 'cpu',
+            antialias=False,
+        ):
+        super().__init__()
+        self.model, _ = clip.load(name=model, device=device, jit=jit)
+
+        self.antialias = antialias
+
+        self.register_buffer('mean', torch.Tensor([0.48145466, 0.4578275, 0.40821073]), persistent=False)
+        self.register_buffer('std', torch.Tensor([0.26862954, 0.26130258, 0.27577711]), persistent=False)
+
+    def preprocess(self, x):
+        # normalize to [0,1]
+        x = kornia.geometry.resize(x, (224, 224),
+                                   interpolation='bicubic',align_corners=True,
+                                   antialias=self.antialias)
+        x = (x + 1.) / 2.
+        # renormalize according to clip
+        x = kornia.enhance.normalize(x, self.mean, self.std)
+        return x
+
+    def forward(self, x):
+        # x is assumed to be in range [-1,1]
+        return self.model.encode_image(self.preprocess(x))
+
+
+if __name__ == "__main__":
+    from ldm.util import count_params
+    model = FrozenCLIPEmbedder()
+    count_params(model, verbose=True)

gligen/ldm/modules/image_degradation/__init__.py

@@ -0,0 +1,2 @@
+from ldm.modules.image_degradation.bsrgan import degradation_bsrgan_variant as degradation_fn_bsr
+from ldm.modules.image_degradation.bsrgan_light import degradation_bsrgan_variant as degradation_fn_bsr_light

gligen/ldm/modules/image_degradation/bsrgan.py

@@ -0,0 +1,730 @@
+# -*- coding: utf-8 -*-
+"""
+# --------------------------------------------
+# Super-Resolution
+# --------------------------------------------
+#
+# Kai Zhang (cskaizhang@gmail.com)
+# https://github.com/cszn
+# From 2019/03--2021/08
+# --------------------------------------------
+"""
+
+import numpy as np
+import cv2
+import torch
+
+from functools import partial
+import random
+from scipy import ndimage
+import scipy
+import scipy.stats as ss
+from scipy.interpolate import interp2d
+from scipy.linalg import orth
+import albumentations
+
+import ldm.modules.image_degradation.utils_image as util
+
+
+def modcrop_np(img, sf):
+    '''
+    Args:
+        img: numpy image, WxH or WxHxC
+        sf: scale factor
+    Return:
+        cropped image
+    '''
+    w, h = img.shape[:2]
+    im = np.copy(img)
+    return im[:w - w % sf, :h - h % sf, ...]
+
+
+"""
+# --------------------------------------------
+# anisotropic Gaussian kernels
+# --------------------------------------------
+"""
+
+
+def analytic_kernel(k):
+    """Calculate the X4 kernel from the X2 kernel (for proof see appendix in paper)"""
+    k_size = k.shape[0]
+    # Calculate the big kernels size
+    big_k = np.zeros((3 * k_size - 2, 3 * k_size - 2))
+    # Loop over the small kernel to fill the big one
+    for r in range(k_size):
+        for c in range(k_size):
+            big_k[2 * r:2 * r + k_size, 2 * c:2 * c + k_size] += k[r, c] * k
+    # Crop the edges of the big kernel to ignore very small values and increase run time of SR
+    crop = k_size // 2
+    cropped_big_k = big_k[crop:-crop, crop:-crop]
+    # Normalize to 1
+    return cropped_big_k / cropped_big_k.sum()
+
+
+def anisotropic_Gaussian(ksize=15, theta=np.pi, l1=6, l2=6):
+    """ generate an anisotropic Gaussian kernel
+    Args:
+        ksize : e.g., 15, kernel size
+        theta : [0,  pi], rotation angle range
+        l1    : [0.1,50], scaling of eigenvalues
+        l2    : [0.1,l1], scaling of eigenvalues
+        If l1 = l2, will get an isotropic Gaussian kernel.
+    Returns:
+        k     : kernel
+    """
+
+    v = np.dot(np.array([[np.cos(theta), -np.sin(theta)], [np.sin(theta), np.cos(theta)]]), np.array([1., 0.]))
+    V = np.array([[v[0], v[1]], [v[1], -v[0]]])
+    D = np.array([[l1, 0], [0, l2]])
+    Sigma = np.dot(np.dot(V, D), np.linalg.inv(V))
+    k = gm_blur_kernel(mean=[0, 0], cov=Sigma, size=ksize)
+
+    return k
+
+
+def gm_blur_kernel(mean, cov, size=15):
+    center = size / 2.0 + 0.5
+    k = np.zeros([size, size])
+    for y in range(size):
+        for x in range(size):
+            cy = y - center + 1
+            cx = x - center + 1
+            k[y, x] = ss.multivariate_normal.pdf([cx, cy], mean=mean, cov=cov)
+
+    k = k / np.sum(k)
+    return k
+
+
+def shift_pixel(x, sf, upper_left=True):
+    """shift pixel for super-resolution with different scale factors
+    Args:
+        x: WxHxC or WxH
+        sf: scale factor
+        upper_left: shift direction
+    """
+    h, w = x.shape[:2]
+    shift = (sf - 1) * 0.5
+    xv, yv = np.arange(0, w, 1.0), np.arange(0, h, 1.0)
+    if upper_left:
+        x1 = xv + shift
+        y1 = yv + shift
+    else:
+        x1 = xv - shift
+        y1 = yv - shift
+
+    x1 = np.clip(x1, 0, w - 1)
+    y1 = np.clip(y1, 0, h - 1)
+
+    if x.ndim == 2:
+        x = interp2d(xv, yv, x)(x1, y1)
+    if x.ndim == 3:
+        for i in range(x.shape[-1]):
+            x[:, :, i] = interp2d(xv, yv, x[:, :, i])(x1, y1)
+
+    return x
+
+
+def blur(x, k):
+    '''
+    x: image, NxcxHxW
+    k: kernel, Nx1xhxw
+    '''
+    n, c = x.shape[:2]
+    p1, p2 = (k.shape[-2] - 1) // 2, (k.shape[-1] - 1) // 2
+    x = torch.nn.functional.pad(x, pad=(p1, p2, p1, p2), mode='replicate')
+    k = k.repeat(1, c, 1, 1)
+    k = k.view(-1, 1, k.shape[2], k.shape[3])
+    x = x.view(1, -1, x.shape[2], x.shape[3])
+    x = torch.nn.functional.conv2d(x, k, bias=None, stride=1, padding=0, groups=n * c)
+    x = x.view(n, c, x.shape[2], x.shape[3])
+
+    return x
+
+
+def gen_kernel(k_size=np.array([15, 15]), scale_factor=np.array([4, 4]), min_var=0.6, max_var=10., noise_level=0):
+    """"
+    # modified version of https://github.com/assafshocher/BlindSR_dataset_generator
+    # Kai Zhang
+    # min_var = 0.175 * sf  # variance of the gaussian kernel will be sampled between min_var and max_var
+    # max_var = 2.5 * sf
+    """
+    # Set random eigen-vals (lambdas) and angle (theta) for COV matrix
+    lambda_1 = min_var + np.random.rand() * (max_var - min_var)
+    lambda_2 = min_var + np.random.rand() * (max_var - min_var)
+    theta = np.random.rand() * np.pi  # random theta
+    noise = -noise_level + np.random.rand(*k_size) * noise_level * 2
+
+    # Set COV matrix using Lambdas and Theta
+    LAMBDA = np.diag([lambda_1, lambda_2])
+    Q = np.array([[np.cos(theta), -np.sin(theta)],
+                  [np.sin(theta), np.cos(theta)]])
+    SIGMA = Q @ LAMBDA @ Q.T
+    INV_SIGMA = np.linalg.inv(SIGMA)[None, None, :, :]
+
+    # Set expectation position (shifting kernel for aligned image)
+    MU = k_size // 2 - 0.5 * (scale_factor - 1)  # - 0.5 * (scale_factor - k_size % 2)
+    MU = MU[None, None, :, None]
+
+    # Create meshgrid for Gaussian
+    [X, Y] = np.meshgrid(range(k_size[0]), range(k_size[1]))
+    Z = np.stack([X, Y], 2)[:, :, :, None]
+
+    # Calcualte Gaussian for every pixel of the kernel
+    ZZ = Z - MU
+    ZZ_t = ZZ.transpose(0, 1, 3, 2)
+    raw_kernel = np.exp(-0.5 * np.squeeze(ZZ_t @ INV_SIGMA @ ZZ)) * (1 + noise)
+
+    # shift the kernel so it will be centered
+    # raw_kernel_centered = kernel_shift(raw_kernel, scale_factor)
+
+    # Normalize the kernel and return
+    # kernel = raw_kernel_centered / np.sum(raw_kernel_centered)
+    kernel = raw_kernel / np.sum(raw_kernel)
+    return kernel
+
+
+def fspecial_gaussian(hsize, sigma):
+    hsize = [hsize, hsize]
+    siz = [(hsize[0] - 1.0) / 2.0, (hsize[1] - 1.0) / 2.0]
+    std = sigma
+    [x, y] = np.meshgrid(np.arange(-siz[1], siz[1] + 1), np.arange(-siz[0], siz[0] + 1))
+    arg = -(x * x + y * y) / (2 * std * std)
+    h = np.exp(arg)
+    h[h < scipy.finfo(float).eps * h.max()] = 0
+    sumh = h.sum()
+    if sumh != 0:
+        h = h / sumh
+    return h
+
+
+def fspecial_laplacian(alpha):
+    alpha = max([0, min([alpha, 1])])
+    h1 = alpha / (alpha + 1)
+    h2 = (1 - alpha) / (alpha + 1)
+    h = [[h1, h2, h1], [h2, -4 / (alpha + 1), h2], [h1, h2, h1]]
+    h = np.array(h)
+    return h
+
+
+def fspecial(filter_type, *args, **kwargs):
+    '''
+    python code from:
+    https://github.com/ronaldosena/imagens-medicas-2/blob/40171a6c259edec7827a6693a93955de2bd39e76/Aulas/aula_2_-_uniform_filter/matlab_fspecial.py
+    '''
+    if filter_type == 'gaussian':
+        return fspecial_gaussian(*args, **kwargs)
+    if filter_type == 'laplacian':
+        return fspecial_laplacian(*args, **kwargs)
+
+
+"""
+# --------------------------------------------
+# degradation models
+# --------------------------------------------
+"""
+
+
+def bicubic_degradation(x, sf=3):
+    '''
+    Args:
+        x: HxWxC image, [0, 1]
+        sf: down-scale factor
+    Return:
+        bicubicly downsampled LR image
+    '''
+    x = util.imresize_np(x, scale=1 / sf)
+    return x
+
+
+def srmd_degradation(x, k, sf=3):
+    ''' blur + bicubic downsampling
+    Args:
+        x: HxWxC image, [0, 1]
+        k: hxw, double
+        sf: down-scale factor
+    Return:
+        downsampled LR image
+    Reference:
+        @inproceedings{zhang2018learning,
+          title={Learning a single convolutional super-resolution network for multiple degradations},
+          author={Zhang, Kai and Zuo, Wangmeng and Zhang, Lei},
+          booktitle={IEEE Conference on Computer Vision and Pattern Recognition},
+          pages={3262--3271},
+          year={2018}
+        }
+    '''
+    x = ndimage.filters.convolve(x, np.expand_dims(k, axis=2), mode='wrap')  # 'nearest' | 'mirror'
+    x = bicubic_degradation(x, sf=sf)
+    return x
+
+
+def dpsr_degradation(x, k, sf=3):
+    ''' bicubic downsampling + blur
+    Args:
+        x: HxWxC image, [0, 1]
+        k: hxw, double
+        sf: down-scale factor
+    Return:
+        downsampled LR image
+    Reference:
+        @inproceedings{zhang2019deep,
+          title={Deep Plug-and-Play Super-Resolution for Arbitrary Blur Kernels},
+          author={Zhang, Kai and Zuo, Wangmeng and Zhang, Lei},
+          booktitle={IEEE Conference on Computer Vision and Pattern Recognition},
+          pages={1671--1681},
+          year={2019}
+        }
+    '''
+    x = bicubic_degradation(x, sf=sf)
+    x = ndimage.filters.convolve(x, np.expand_dims(k, axis=2), mode='wrap')
+    return x
+
+
+def classical_degradation(x, k, sf=3):
+    ''' blur + downsampling
+    Args:
+        x: HxWxC image, [0, 1]/[0, 255]
+        k: hxw, double
+        sf: down-scale factor
+    Return:
+        downsampled LR image
+    '''
+    x = ndimage.filters.convolve(x, np.expand_dims(k, axis=2), mode='wrap')
+    # x = filters.correlate(x, np.expand_dims(np.flip(k), axis=2))
+    st = 0
+    return x[st::sf, st::sf, ...]
+
+
+def add_sharpening(img, weight=0.5, radius=50, threshold=10):
+    """USM sharpening. borrowed from real-ESRGAN
+    Input image: I; Blurry image: B.
+    1. K = I + weight * (I - B)
+    2. Mask = 1 if abs(I - B) > threshold, else: 0
+    3. Blur mask:
+    4. Out = Mask * K + (1 - Mask) * I
+    Args:
+        img (Numpy array): Input image, HWC, BGR; float32, [0, 1].
+        weight (float): Sharp weight. Default: 1.
+        radius (float): Kernel size of Gaussian blur. Default: 50.
+        threshold (int):
+    """
+    if radius % 2 == 0:
+        radius += 1
+    blur = cv2.GaussianBlur(img, (radius, radius), 0)
+    residual = img - blur
+    mask = np.abs(residual) * 255 > threshold
+    mask = mask.astype('float32')
+    soft_mask = cv2.GaussianBlur(mask, (radius, radius), 0)
+
+    K = img + weight * residual
+    K = np.clip(K, 0, 1)
+    return soft_mask * K + (1 - soft_mask) * img
+
+
+def add_blur(img, sf=4):
+    wd2 = 4.0 + sf
+    wd = 2.0 + 0.2 * sf
+    if random.random() < 0.5:
+        l1 = wd2 * random.random()
+        l2 = wd2 * random.random()
+        k = anisotropic_Gaussian(ksize=2 * random.randint(2, 11) + 3, theta=random.random() * np.pi, l1=l1, l2=l2)
+    else:
+        k = fspecial('gaussian', 2 * random.randint(2, 11) + 3, wd * random.random())
+    img = ndimage.filters.convolve(img, np.expand_dims(k, axis=2), mode='mirror')
+
+    return img
+
+
+def add_resize(img, sf=4):
+    rnum = np.random.rand()
+    if rnum > 0.8:  # up
+        sf1 = random.uniform(1, 2)
+    elif rnum < 0.7:  # down
+        sf1 = random.uniform(0.5 / sf, 1)
+    else:
+        sf1 = 1.0
+    img = cv2.resize(img, (int(sf1 * img.shape[1]), int(sf1 * img.shape[0])), interpolation=random.choice([1, 2, 3]))
+    img = np.clip(img, 0.0, 1.0)
+
+    return img
+
+
+# def add_Gaussian_noise(img, noise_level1=2, noise_level2=25):
+#     noise_level = random.randint(noise_level1, noise_level2)
+#     rnum = np.random.rand()
+#     if rnum > 0.6:  # add color Gaussian noise
+#         img += np.random.normal(0, noise_level / 255.0, img.shape).astype(np.float32)
+#     elif rnum < 0.4:  # add grayscale Gaussian noise
+#         img += np.random.normal(0, noise_level / 255.0, (*img.shape[:2], 1)).astype(np.float32)
+#     else:  # add  noise
+#         L = noise_level2 / 255.
+#         D = np.diag(np.random.rand(3))
+#         U = orth(np.random.rand(3, 3))
+#         conv = np.dot(np.dot(np.transpose(U), D), U)
+#         img += np.random.multivariate_normal([0, 0, 0], np.abs(L ** 2 * conv), img.shape[:2]).astype(np.float32)
+#     img = np.clip(img, 0.0, 1.0)
+#     return img
+
+def add_Gaussian_noise(img, noise_level1=2, noise_level2=25):
+    noise_level = random.randint(noise_level1, noise_level2)
+    rnum = np.random.rand()
+    if rnum > 0.6:  # add color Gaussian noise
+        img = img + np.random.normal(0, noise_level / 255.0, img.shape).astype(np.float32)
+    elif rnum < 0.4:  # add grayscale Gaussian noise
+        img = img + np.random.normal(0, noise_level / 255.0, (*img.shape[:2], 1)).astype(np.float32)
+    else:  # add  noise
+        L = noise_level2 / 255.
+        D = np.diag(np.random.rand(3))
+        U = orth(np.random.rand(3, 3))
+        conv = np.dot(np.dot(np.transpose(U), D), U)
+        img = img + np.random.multivariate_normal([0, 0, 0], np.abs(L ** 2 * conv), img.shape[:2]).astype(np.float32)
+    img = np.clip(img, 0.0, 1.0)
+    return img
+
+
+def add_speckle_noise(img, noise_level1=2, noise_level2=25):
+    noise_level = random.randint(noise_level1, noise_level2)
+    img = np.clip(img, 0.0, 1.0)
+    rnum = random.random()
+    if rnum > 0.6:
+        img += img * np.random.normal(0, noise_level / 255.0, img.shape).astype(np.float32)
+    elif rnum < 0.4:
+        img += img * np.random.normal(0, noise_level / 255.0, (*img.shape[:2], 1)).astype(np.float32)
+    else:
+        L = noise_level2 / 255.
+        D = np.diag(np.random.rand(3))
+        U = orth(np.random.rand(3, 3))
+        conv = np.dot(np.dot(np.transpose(U), D), U)
+        img += img * np.random.multivariate_normal([0, 0, 0], np.abs(L ** 2 * conv), img.shape[:2]).astype(np.float32)
+    img = np.clip(img, 0.0, 1.0)
+    return img
+
+
+def add_Poisson_noise(img):
+    img = np.clip((img * 255.0).round(), 0, 255) / 255.
+    vals = 10 ** (2 * random.random() + 2.0)  # [2, 4]
+    if random.random() < 0.5:
+        img = np.random.poisson(img * vals).astype(np.float32) / vals
+    else:
+        img_gray = np.dot(img[..., :3], [0.299, 0.587, 0.114])
+        img_gray = np.clip((img_gray * 255.0).round(), 0, 255) / 255.
+        noise_gray = np.random.poisson(img_gray * vals).astype(np.float32) / vals - img_gray
+        img += noise_gray[:, :, np.newaxis]
+    img = np.clip(img, 0.0, 1.0)
+    return img
+
+
+def add_JPEG_noise(img):
+    quality_factor = random.randint(30, 95)
+    img = cv2.cvtColor(util.single2uint(img), cv2.COLOR_RGB2BGR)
+    result, encimg = cv2.imencode('.jpg', img, [int(cv2.IMWRITE_JPEG_QUALITY), quality_factor])
+    img = cv2.imdecode(encimg, 1)
+    img = cv2.cvtColor(util.uint2single(img), cv2.COLOR_BGR2RGB)
+    return img
+
+
+def random_crop(lq, hq, sf=4, lq_patchsize=64):
+    h, w = lq.shape[:2]
+    rnd_h = random.randint(0, h - lq_patchsize)
+    rnd_w = random.randint(0, w - lq_patchsize)
+    lq = lq[rnd_h:rnd_h + lq_patchsize, rnd_w:rnd_w + lq_patchsize, :]
+
+    rnd_h_H, rnd_w_H = int(rnd_h * sf), int(rnd_w * sf)
+    hq = hq[rnd_h_H:rnd_h_H + lq_patchsize * sf, rnd_w_H:rnd_w_H + lq_patchsize * sf, :]
+    return lq, hq
+
+
+def degradation_bsrgan(img, sf=4, lq_patchsize=72, isp_model=None):
+    """
+    This is the degradation model of BSRGAN from the paper
+    "Designing a Practical Degradation Model for Deep Blind Image Super-Resolution"
+    ----------
+    img: HXWXC, [0, 1], its size should be large than (lq_patchsizexsf)x(lq_patchsizexsf)
+    sf: scale factor
+    isp_model: camera ISP model
+    Returns
+    -------
+    img: low-quality patch, size: lq_patchsizeXlq_patchsizeXC, range: [0, 1]
+    hq: corresponding high-quality patch, size: (lq_patchsizexsf)X(lq_patchsizexsf)XC, range: [0, 1]
+    """
+    isp_prob, jpeg_prob, scale2_prob = 0.25, 0.9, 0.25
+    sf_ori = sf
+
+    h1, w1 = img.shape[:2]
+    img = img.copy()[:w1 - w1 % sf, :h1 - h1 % sf, ...]  # mod crop
+    h, w = img.shape[:2]
+
+    if h < lq_patchsize * sf or w < lq_patchsize * sf:
+        raise ValueError(f'img size ({h1}X{w1}) is too small!')
+
+    hq = img.copy()
+
+    if sf == 4 and random.random() < scale2_prob:  # downsample1
+        if np.random.rand() < 0.5:
+            img = cv2.resize(img, (int(1 / 2 * img.shape[1]), int(1 / 2 * img.shape[0])),
+                             interpolation=random.choice([1, 2, 3]))
+        else:
+            img = util.imresize_np(img, 1 / 2, True)
+        img = np.clip(img, 0.0, 1.0)
+        sf = 2
+
+    shuffle_order = random.sample(range(7), 7)
+    idx1, idx2 = shuffle_order.index(2), shuffle_order.index(3)
+    if idx1 > idx2:  # keep downsample3 last
+        shuffle_order[idx1], shuffle_order[idx2] = shuffle_order[idx2], shuffle_order[idx1]
+
+    for i in shuffle_order:
+
+        if i == 0:
+            img = add_blur(img, sf=sf)
+
+        elif i == 1:
+            img = add_blur(img, sf=sf)
+
+        elif i == 2:
+            a, b = img.shape[1], img.shape[0]
+            # downsample2
+            if random.random() < 0.75:
+                sf1 = random.uniform(1, 2 * sf)
+                img = cv2.resize(img, (int(1 / sf1 * img.shape[1]), int(1 / sf1 * img.shape[0])),
+                                 interpolation=random.choice([1, 2, 3]))
+            else:
+                k = fspecial('gaussian', 25, random.uniform(0.1, 0.6 * sf))
+                k_shifted = shift_pixel(k, sf)
+                k_shifted = k_shifted / k_shifted.sum()  # blur with shifted kernel
+                img = ndimage.filters.convolve(img, np.expand_dims(k_shifted, axis=2), mode='mirror')
+                img = img[0::sf, 0::sf, ...]  # nearest downsampling
+            img = np.clip(img, 0.0, 1.0)
+
+        elif i == 3:
+            # downsample3
+            img = cv2.resize(img, (int(1 / sf * a), int(1 / sf * b)), interpolation=random.choice([1, 2, 3]))
+            img = np.clip(img, 0.0, 1.0)
+
+        elif i == 4:
+            # add Gaussian noise
+            img = add_Gaussian_noise(img, noise_level1=2, noise_level2=25)
+
+        elif i == 5:
+            # add JPEG noise
+            if random.random() < jpeg_prob:
+                img = add_JPEG_noise(img)
+
+        elif i == 6:
+            # add processed camera sensor noise
+            if random.random() < isp_prob and isp_model is not None:
+                with torch.no_grad():
+                    img, hq = isp_model.forward(img.copy(), hq)
+
+    # add final JPEG compression noise
+    img = add_JPEG_noise(img)
+
+    # random crop
+    img, hq = random_crop(img, hq, sf_ori, lq_patchsize)
+
+    return img, hq
+
+
+# todo no isp_model?
+def degradation_bsrgan_variant(image, sf=4, isp_model=None):
+    """
+    This is the degradation model of BSRGAN from the paper
+    "Designing a Practical Degradation Model for Deep Blind Image Super-Resolution"
+    ----------
+    sf: scale factor
+    isp_model: camera ISP model
+    Returns
+    -------
+    img: low-quality patch, size: lq_patchsizeXlq_patchsizeXC, range: [0, 1]
+    hq: corresponding high-quality patch, size: (lq_patchsizexsf)X(lq_patchsizexsf)XC, range: [0, 1]
+    """
+    image = util.uint2single(image)
+    isp_prob, jpeg_prob, scale2_prob = 0.25, 0.9, 0.25
+    sf_ori = sf
+
+    h1, w1 = image.shape[:2]
+    image = image.copy()[:w1 - w1 % sf, :h1 - h1 % sf, ...]  # mod crop
+    h, w = image.shape[:2]
+
+    hq = image.copy()
+
+    if sf == 4 and random.random() < scale2_prob:  # downsample1
+        if np.random.rand() < 0.5:
+            image = cv2.resize(image, (int(1 / 2 * image.shape[1]), int(1 / 2 * image.shape[0])),
+                               interpolation=random.choice([1, 2, 3]))
+        else:
+            image = util.imresize_np(image, 1 / 2, True)
+        image = np.clip(image, 0.0, 1.0)
+        sf = 2
+
+    shuffle_order = random.sample(range(7), 7)
+    idx1, idx2 = shuffle_order.index(2), shuffle_order.index(3)
+    if idx1 > idx2:  # keep downsample3 last
+        shuffle_order[idx1], shuffle_order[idx2] = shuffle_order[idx2], shuffle_order[idx1]
+
+    for i in shuffle_order:
+
+        if i == 0:
+            image = add_blur(image, sf=sf)
+
+        elif i == 1:
+            image = add_blur(image, sf=sf)
+
+        elif i == 2:
+            a, b = image.shape[1], image.shape[0]
+            # downsample2
+            if random.random() < 0.75:
+                sf1 = random.uniform(1, 2 * sf)
+                image = cv2.resize(image, (int(1 / sf1 * image.shape[1]), int(1 / sf1 * image.shape[0])),
+                                   interpolation=random.choice([1, 2, 3]))
+            else:
+                k = fspecial('gaussian', 25, random.uniform(0.1, 0.6 * sf))
+                k_shifted = shift_pixel(k, sf)
+                k_shifted = k_shifted / k_shifted.sum()  # blur with shifted kernel
+                image = ndimage.filters.convolve(image, np.expand_dims(k_shifted, axis=2), mode='mirror')
+                image = image[0::sf, 0::sf, ...]  # nearest downsampling
+            image = np.clip(image, 0.0, 1.0)
+
+        elif i == 3:
+            # downsample3
+            image = cv2.resize(image, (int(1 / sf * a), int(1 / sf * b)), interpolation=random.choice([1, 2, 3]))
+            image = np.clip(image, 0.0, 1.0)
+
+        elif i == 4:
+            # add Gaussian noise
+            image = add_Gaussian_noise(image, noise_level1=2, noise_level2=25)
+
+        elif i == 5:
+            # add JPEG noise
+            if random.random() < jpeg_prob:
+                image = add_JPEG_noise(image)
+
+        # elif i == 6:
+        #     # add processed camera sensor noise
+        #     if random.random() < isp_prob and isp_model is not None:
+        #         with torch.no_grad():
+        #             img, hq = isp_model.forward(img.copy(), hq)
+
+    # add final JPEG compression noise
+    image = add_JPEG_noise(image)
+    image = util.single2uint(image)
+    example = {"image":image}
+    return example
+
+
+# TODO incase there is a pickle error one needs to replace a += x with a = a + x in add_speckle_noise etc...
+def degradation_bsrgan_plus(img, sf=4, shuffle_prob=0.5, use_sharp=True, lq_patchsize=64, isp_model=None):
+    """
+    This is an extended degradation model by combining
+    the degradation models of BSRGAN and Real-ESRGAN
+    ----------
+    img: HXWXC, [0, 1], its size should be large than (lq_patchsizexsf)x(lq_patchsizexsf)
+    sf: scale factor
+    use_shuffle: the degradation shuffle
+    use_sharp: sharpening the img
+    Returns
+    -------
+    img: low-quality patch, size: lq_patchsizeXlq_patchsizeXC, range: [0, 1]
+    hq: corresponding high-quality patch, size: (lq_patchsizexsf)X(lq_patchsizexsf)XC, range: [0, 1]
+    """
+
+    h1, w1 = img.shape[:2]
+    img = img.copy()[:w1 - w1 % sf, :h1 - h1 % sf, ...]  # mod crop
+    h, w = img.shape[:2]
+
+    if h < lq_patchsize * sf or w < lq_patchsize * sf:
+        raise ValueError(f'img size ({h1}X{w1}) is too small!')
+
+    if use_sharp:
+        img = add_sharpening(img)
+    hq = img.copy()
+
+    if random.random() < shuffle_prob:
+        shuffle_order = random.sample(range(13), 13)
+    else:
+        shuffle_order = list(range(13))
+        # local shuffle for noise, JPEG is always the last one
+        shuffle_order[2:6] = random.sample(shuffle_order[2:6], len(range(2, 6)))
+        shuffle_order[9:13] = random.sample(shuffle_order[9:13], len(range(9, 13)))
+
+    poisson_prob, speckle_prob, isp_prob = 0.1, 0.1, 0.1
+
+    for i in shuffle_order:
+        if i == 0:
+            img = add_blur(img, sf=sf)
+        elif i == 1:
+            img = add_resize(img, sf=sf)
+        elif i == 2:
+            img = add_Gaussian_noise(img, noise_level1=2, noise_level2=25)
+        elif i == 3:
+            if random.random() < poisson_prob:
+                img = add_Poisson_noise(img)
+        elif i == 4:
+            if random.random() < speckle_prob:
+                img = add_speckle_noise(img)
+        elif i == 5:
+            if random.random() < isp_prob and isp_model is not None:
+                with torch.no_grad():
+                    img, hq = isp_model.forward(img.copy(), hq)
+        elif i == 6:
+            img = add_JPEG_noise(img)
+        elif i == 7:
+            img = add_blur(img, sf=sf)
+        elif i == 8:
+            img = add_resize(img, sf=sf)
+        elif i == 9:
+            img = add_Gaussian_noise(img, noise_level1=2, noise_level2=25)
+        elif i == 10:
+            if random.random() < poisson_prob:
+                img = add_Poisson_noise(img)
+        elif i == 11:
+            if random.random() < speckle_prob:
+                img = add_speckle_noise(img)
+        elif i == 12:
+            if random.random() < isp_prob and isp_model is not None:
+                with torch.no_grad():
+                    img, hq = isp_model.forward(img.copy(), hq)
+        else:
+            print('check the shuffle!')
+
+    # resize to desired size
+    img = cv2.resize(img, (int(1 / sf * hq.shape[1]), int(1 / sf * hq.shape[0])),
+                     interpolation=random.choice([1, 2, 3]))
+
+    # add final JPEG compression noise
+    img = add_JPEG_noise(img)
+
+    # random crop
+    img, hq = random_crop(img, hq, sf, lq_patchsize)
+
+    return img, hq
+
+
+if __name__ == '__main__':
+	print("hey")
+	img = util.imread_uint('utils/test.png', 3)
+	print(img)
+	img = util.uint2single(img)
+	print(img)
+	img = img[:448, :448]
+	h = img.shape[0] // 4
+	print("resizing to", h)
+	sf = 4
+	deg_fn = partial(degradation_bsrgan_variant, sf=sf)
+	for i in range(20):
+		print(i)
+		img_lq = deg_fn(img)
+		print(img_lq)
+		img_lq_bicubic = albumentations.SmallestMaxSize(max_size=h, interpolation=cv2.INTER_CUBIC)(image=img)["image"]
+		print(img_lq.shape)
+		print("bicubic", img_lq_bicubic.shape)
+		print(img_hq.shape)
+		lq_nearest = cv2.resize(util.single2uint(img_lq), (int(sf * img_lq.shape[1]), int(sf * img_lq.shape[0])),
+		                        interpolation=0)
+		lq_bicubic_nearest = cv2.resize(util.single2uint(img_lq_bicubic), (int(sf * img_lq.shape[1]), int(sf * img_lq.shape[0])),
+		                        interpolation=0)
+		img_concat = np.concatenate([lq_bicubic_nearest, lq_nearest, util.single2uint(img_hq)], axis=1)
+		util.imsave(img_concat, str(i) + '.png')
+
+

gligen/ldm/modules/image_degradation/bsrgan_light.py

@@ -0,0 +1,650 @@
+# -*- coding: utf-8 -*-
+import numpy as np
+import cv2
+import torch
+
+from functools import partial
+import random
+from scipy import ndimage
+import scipy
+import scipy.stats as ss
+from scipy.interpolate import interp2d
+from scipy.linalg import orth
+import albumentations
+
+import ldm.modules.image_degradation.utils_image as util
+
+"""
+# --------------------------------------------
+# Super-Resolution
+# --------------------------------------------
+#
+# Kai Zhang (cskaizhang@gmail.com)
+# https://github.com/cszn
+# From 2019/03--2021/08
+# --------------------------------------------
+"""
+
+
+def modcrop_np(img, sf):
+    '''
+    Args:
+        img: numpy image, WxH or WxHxC
+        sf: scale factor
+    Return:
+        cropped image
+    '''
+    w, h = img.shape[:2]
+    im = np.copy(img)
+    return im[:w - w % sf, :h - h % sf, ...]
+
+
+"""
+# --------------------------------------------
+# anisotropic Gaussian kernels
+# --------------------------------------------
+"""
+
+
+def analytic_kernel(k):
+    """Calculate the X4 kernel from the X2 kernel (for proof see appendix in paper)"""
+    k_size = k.shape[0]
+    # Calculate the big kernels size
+    big_k = np.zeros((3 * k_size - 2, 3 * k_size - 2))
+    # Loop over the small kernel to fill the big one
+    for r in range(k_size):
+        for c in range(k_size):
+            big_k[2 * r:2 * r + k_size, 2 * c:2 * c + k_size] += k[r, c] * k
+    # Crop the edges of the big kernel to ignore very small values and increase run time of SR
+    crop = k_size // 2
+    cropped_big_k = big_k[crop:-crop, crop:-crop]
+    # Normalize to 1
+    return cropped_big_k / cropped_big_k.sum()
+
+
+def anisotropic_Gaussian(ksize=15, theta=np.pi, l1=6, l2=6):
+    """ generate an anisotropic Gaussian kernel
+    Args:
+        ksize : e.g., 15, kernel size
+        theta : [0,  pi], rotation angle range
+        l1    : [0.1,50], scaling of eigenvalues
+        l2    : [0.1,l1], scaling of eigenvalues
+        If l1 = l2, will get an isotropic Gaussian kernel.
+    Returns:
+        k     : kernel
+    """
+
+    v = np.dot(np.array([[np.cos(theta), -np.sin(theta)], [np.sin(theta), np.cos(theta)]]), np.array([1., 0.]))
+    V = np.array([[v[0], v[1]], [v[1], -v[0]]])
+    D = np.array([[l1, 0], [0, l2]])
+    Sigma = np.dot(np.dot(V, D), np.linalg.inv(V))
+    k = gm_blur_kernel(mean=[0, 0], cov=Sigma, size=ksize)
+
+    return k
+
+
+def gm_blur_kernel(mean, cov, size=15):
+    center = size / 2.0 + 0.5
+    k = np.zeros([size, size])
+    for y in range(size):
+        for x in range(size):
+            cy = y - center + 1
+            cx = x - center + 1
+            k[y, x] = ss.multivariate_normal.pdf([cx, cy], mean=mean, cov=cov)
+
+    k = k / np.sum(k)
+    return k
+
+
+def shift_pixel(x, sf, upper_left=True):
+    """shift pixel for super-resolution with different scale factors
+    Args:
+        x: WxHxC or WxH
+        sf: scale factor
+        upper_left: shift direction
+    """
+    h, w = x.shape[:2]
+    shift = (sf - 1) * 0.5
+    xv, yv = np.arange(0, w, 1.0), np.arange(0, h, 1.0)
+    if upper_left:
+        x1 = xv + shift
+        y1 = yv + shift
+    else:
+        x1 = xv - shift
+        y1 = yv - shift
+
+    x1 = np.clip(x1, 0, w - 1)
+    y1 = np.clip(y1, 0, h - 1)
+
+    if x.ndim == 2:
+        x = interp2d(xv, yv, x)(x1, y1)
+    if x.ndim == 3:
+        for i in range(x.shape[-1]):
+            x[:, :, i] = interp2d(xv, yv, x[:, :, i])(x1, y1)
+
+    return x
+
+
+def blur(x, k):
+    '''
+    x: image, NxcxHxW
+    k: kernel, Nx1xhxw
+    '''
+    n, c = x.shape[:2]
+    p1, p2 = (k.shape[-2] - 1) // 2, (k.shape[-1] - 1) // 2
+    x = torch.nn.functional.pad(x, pad=(p1, p2, p1, p2), mode='replicate')
+    k = k.repeat(1, c, 1, 1)
+    k = k.view(-1, 1, k.shape[2], k.shape[3])
+    x = x.view(1, -1, x.shape[2], x.shape[3])
+    x = torch.nn.functional.conv2d(x, k, bias=None, stride=1, padding=0, groups=n * c)
+    x = x.view(n, c, x.shape[2], x.shape[3])
+
+    return x
+
+
+def gen_kernel(k_size=np.array([15, 15]), scale_factor=np.array([4, 4]), min_var=0.6, max_var=10., noise_level=0):
+    """"
+    # modified version of https://github.com/assafshocher/BlindSR_dataset_generator
+    # Kai Zhang
+    # min_var = 0.175 * sf  # variance of the gaussian kernel will be sampled between min_var and max_var
+    # max_var = 2.5 * sf
+    """
+    # Set random eigen-vals (lambdas) and angle (theta) for COV matrix
+    lambda_1 = min_var + np.random.rand() * (max_var - min_var)
+    lambda_2 = min_var + np.random.rand() * (max_var - min_var)
+    theta = np.random.rand() * np.pi  # random theta
+    noise = -noise_level + np.random.rand(*k_size) * noise_level * 2
+
+    # Set COV matrix using Lambdas and Theta
+    LAMBDA = np.diag([lambda_1, lambda_2])
+    Q = np.array([[np.cos(theta), -np.sin(theta)],
+                  [np.sin(theta), np.cos(theta)]])
+    SIGMA = Q @ LAMBDA @ Q.T
+    INV_SIGMA = np.linalg.inv(SIGMA)[None, None, :, :]
+
+    # Set expectation position (shifting kernel for aligned image)
+    MU = k_size // 2 - 0.5 * (scale_factor - 1)  # - 0.5 * (scale_factor - k_size % 2)
+    MU = MU[None, None, :, None]
+
+    # Create meshgrid for Gaussian
+    [X, Y] = np.meshgrid(range(k_size[0]), range(k_size[1]))
+    Z = np.stack([X, Y], 2)[:, :, :, None]
+
+    # Calcualte Gaussian for every pixel of the kernel
+    ZZ = Z - MU
+    ZZ_t = ZZ.transpose(0, 1, 3, 2)
+    raw_kernel = np.exp(-0.5 * np.squeeze(ZZ_t @ INV_SIGMA @ ZZ)) * (1 + noise)
+
+    # shift the kernel so it will be centered
+    # raw_kernel_centered = kernel_shift(raw_kernel, scale_factor)
+
+    # Normalize the kernel and return
+    # kernel = raw_kernel_centered / np.sum(raw_kernel_centered)
+    kernel = raw_kernel / np.sum(raw_kernel)
+    return kernel
+
+
+def fspecial_gaussian(hsize, sigma):
+    hsize = [hsize, hsize]
+    siz = [(hsize[0] - 1.0) / 2.0, (hsize[1] - 1.0) / 2.0]
+    std = sigma
+    [x, y] = np.meshgrid(np.arange(-siz[1], siz[1] + 1), np.arange(-siz[0], siz[0] + 1))
+    arg = -(x * x + y * y) / (2 * std * std)
+    h = np.exp(arg)
+    h[h < scipy.finfo(float).eps * h.max()] = 0
+    sumh = h.sum()
+    if sumh != 0:
+        h = h / sumh
+    return h
+
+
+def fspecial_laplacian(alpha):
+    alpha = max([0, min([alpha, 1])])
+    h1 = alpha / (alpha + 1)
+    h2 = (1 - alpha) / (alpha + 1)
+    h = [[h1, h2, h1], [h2, -4 / (alpha + 1), h2], [h1, h2, h1]]
+    h = np.array(h)
+    return h
+
+
+def fspecial(filter_type, *args, **kwargs):
+    '''
+    python code from:
+    https://github.com/ronaldosena/imagens-medicas-2/blob/40171a6c259edec7827a6693a93955de2bd39e76/Aulas/aula_2_-_uniform_filter/matlab_fspecial.py
+    '''
+    if filter_type == 'gaussian':
+        return fspecial_gaussian(*args, **kwargs)
+    if filter_type == 'laplacian':
+        return fspecial_laplacian(*args, **kwargs)
+
+
+"""
+# --------------------------------------------
+# degradation models
+# --------------------------------------------
+"""
+
+
+def bicubic_degradation(x, sf=3):
+    '''
+    Args:
+        x: HxWxC image, [0, 1]
+        sf: down-scale factor
+    Return:
+        bicubicly downsampled LR image
+    '''
+    x = util.imresize_np(x, scale=1 / sf)
+    return x
+
+
+def srmd_degradation(x, k, sf=3):
+    ''' blur + bicubic downsampling
+    Args:
+        x: HxWxC image, [0, 1]
+        k: hxw, double
+        sf: down-scale factor
+    Return:
+        downsampled LR image
+    Reference:
+        @inproceedings{zhang2018learning,
+          title={Learning a single convolutional super-resolution network for multiple degradations},
+          author={Zhang, Kai and Zuo, Wangmeng and Zhang, Lei},
+          booktitle={IEEE Conference on Computer Vision and Pattern Recognition},
+          pages={3262--3271},
+          year={2018}
+        }
+    '''
+    x = ndimage.filters.convolve(x, np.expand_dims(k, axis=2), mode='wrap')  # 'nearest' | 'mirror'
+    x = bicubic_degradation(x, sf=sf)
+    return x
+
+
+def dpsr_degradation(x, k, sf=3):
+    ''' bicubic downsampling + blur
+    Args:
+        x: HxWxC image, [0, 1]
+        k: hxw, double
+        sf: down-scale factor
+    Return:
+        downsampled LR image
+    Reference:
+        @inproceedings{zhang2019deep,
+          title={Deep Plug-and-Play Super-Resolution for Arbitrary Blur Kernels},
+          author={Zhang, Kai and Zuo, Wangmeng and Zhang, Lei},
+          booktitle={IEEE Conference on Computer Vision and Pattern Recognition},
+          pages={1671--1681},
+          year={2019}
+        }
+    '''
+    x = bicubic_degradation(x, sf=sf)
+    x = ndimage.filters.convolve(x, np.expand_dims(k, axis=2), mode='wrap')
+    return x
+
+
+def classical_degradation(x, k, sf=3):
+    ''' blur + downsampling
+    Args:
+        x: HxWxC image, [0, 1]/[0, 255]
+        k: hxw, double
+        sf: down-scale factor
+    Return:
+        downsampled LR image
+    '''
+    x = ndimage.filters.convolve(x, np.expand_dims(k, axis=2), mode='wrap')
+    # x = filters.correlate(x, np.expand_dims(np.flip(k), axis=2))
+    st = 0
+    return x[st::sf, st::sf, ...]
+
+
+def add_sharpening(img, weight=0.5, radius=50, threshold=10):
+    """USM sharpening. borrowed from real-ESRGAN
+    Input image: I; Blurry image: B.
+    1. K = I + weight * (I - B)
+    2. Mask = 1 if abs(I - B) > threshold, else: 0
+    3. Blur mask:
+    4. Out = Mask * K + (1 - Mask) * I
+    Args:
+        img (Numpy array): Input image, HWC, BGR; float32, [0, 1].
+        weight (float): Sharp weight. Default: 1.
+        radius (float): Kernel size of Gaussian blur. Default: 50.
+        threshold (int):
+    """
+    if radius % 2 == 0:
+        radius += 1
+    blur = cv2.GaussianBlur(img, (radius, radius), 0)
+    residual = img - blur
+    mask = np.abs(residual) * 255 > threshold
+    mask = mask.astype('float32')
+    soft_mask = cv2.GaussianBlur(mask, (radius, radius), 0)
+
+    K = img + weight * residual
+    K = np.clip(K, 0, 1)
+    return soft_mask * K + (1 - soft_mask) * img
+
+
+def add_blur(img, sf=4):
+    wd2 = 4.0 + sf
+    wd = 2.0 + 0.2 * sf
+
+    wd2 = wd2/4
+    wd = wd/4
+
+    if random.random() < 0.5:
+        l1 = wd2 * random.random()
+        l2 = wd2 * random.random()
+        k = anisotropic_Gaussian(ksize=random.randint(2, 11) + 3, theta=random.random() * np.pi, l1=l1, l2=l2)
+    else:
+        k = fspecial('gaussian', random.randint(2, 4) + 3, wd * random.random())
+    img = ndimage.filters.convolve(img, np.expand_dims(k, axis=2), mode='mirror')
+
+    return img
+
+
+def add_resize(img, sf=4):
+    rnum = np.random.rand()
+    if rnum > 0.8:  # up
+        sf1 = random.uniform(1, 2)
+    elif rnum < 0.7:  # down
+        sf1 = random.uniform(0.5 / sf, 1)
+    else:
+        sf1 = 1.0
+    img = cv2.resize(img, (int(sf1 * img.shape[1]), int(sf1 * img.shape[0])), interpolation=random.choice([1, 2, 3]))
+    img = np.clip(img, 0.0, 1.0)
+
+    return img
+
+
+# def add_Gaussian_noise(img, noise_level1=2, noise_level2=25):
+#     noise_level = random.randint(noise_level1, noise_level2)
+#     rnum = np.random.rand()
+#     if rnum > 0.6:  # add color Gaussian noise
+#         img += np.random.normal(0, noise_level / 255.0, img.shape).astype(np.float32)
+#     elif rnum < 0.4:  # add grayscale Gaussian noise
+#         img += np.random.normal(0, noise_level / 255.0, (*img.shape[:2], 1)).astype(np.float32)
+#     else:  # add  noise
+#         L = noise_level2 / 255.
+#         D = np.diag(np.random.rand(3))
+#         U = orth(np.random.rand(3, 3))
+#         conv = np.dot(np.dot(np.transpose(U), D), U)
+#         img += np.random.multivariate_normal([0, 0, 0], np.abs(L ** 2 * conv), img.shape[:2]).astype(np.float32)
+#     img = np.clip(img, 0.0, 1.0)
+#     return img
+
+def add_Gaussian_noise(img, noise_level1=2, noise_level2=25):
+    noise_level = random.randint(noise_level1, noise_level2)
+    rnum = np.random.rand()
+    if rnum > 0.6:  # add color Gaussian noise
+        img = img + np.random.normal(0, noise_level / 255.0, img.shape).astype(np.float32)
+    elif rnum < 0.4:  # add grayscale Gaussian noise
+        img = img + np.random.normal(0, noise_level / 255.0, (*img.shape[:2], 1)).astype(np.float32)
+    else:  # add  noise
+        L = noise_level2 / 255.
+        D = np.diag(np.random.rand(3))
+        U = orth(np.random.rand(3, 3))
+        conv = np.dot(np.dot(np.transpose(U), D), U)
+        img = img + np.random.multivariate_normal([0, 0, 0], np.abs(L ** 2 * conv), img.shape[:2]).astype(np.float32)
+    img = np.clip(img, 0.0, 1.0)
+    return img
+
+
+def add_speckle_noise(img, noise_level1=2, noise_level2=25):
+    noise_level = random.randint(noise_level1, noise_level2)
+    img = np.clip(img, 0.0, 1.0)
+    rnum = random.random()
+    if rnum > 0.6:
+        img += img * np.random.normal(0, noise_level / 255.0, img.shape).astype(np.float32)
+    elif rnum < 0.4:
+        img += img * np.random.normal(0, noise_level / 255.0, (*img.shape[:2], 1)).astype(np.float32)
+    else:
+        L = noise_level2 / 255.
+        D = np.diag(np.random.rand(3))
+        U = orth(np.random.rand(3, 3))
+        conv = np.dot(np.dot(np.transpose(U), D), U)
+        img += img * np.random.multivariate_normal([0, 0, 0], np.abs(L ** 2 * conv), img.shape[:2]).astype(np.float32)
+    img = np.clip(img, 0.0, 1.0)
+    return img
+
+
+def add_Poisson_noise(img):
+    img = np.clip((img * 255.0).round(), 0, 255) / 255.
+    vals = 10 ** (2 * random.random() + 2.0)  # [2, 4]
+    if random.random() < 0.5:
+        img = np.random.poisson(img * vals).astype(np.float32) / vals
+    else:
+        img_gray = np.dot(img[..., :3], [0.299, 0.587, 0.114])
+        img_gray = np.clip((img_gray * 255.0).round(), 0, 255) / 255.
+        noise_gray = np.random.poisson(img_gray * vals).astype(np.float32) / vals - img_gray
+        img += noise_gray[:, :, np.newaxis]
+    img = np.clip(img, 0.0, 1.0)
+    return img
+
+
+def add_JPEG_noise(img):
+    quality_factor = random.randint(80, 95)
+    img = cv2.cvtColor(util.single2uint(img), cv2.COLOR_RGB2BGR)
+    result, encimg = cv2.imencode('.jpg', img, [int(cv2.IMWRITE_JPEG_QUALITY), quality_factor])
+    img = cv2.imdecode(encimg, 1)
+    img = cv2.cvtColor(util.uint2single(img), cv2.COLOR_BGR2RGB)
+    return img
+
+
+def random_crop(lq, hq, sf=4, lq_patchsize=64):
+    h, w = lq.shape[:2]
+    rnd_h = random.randint(0, h - lq_patchsize)
+    rnd_w = random.randint(0, w - lq_patchsize)
+    lq = lq[rnd_h:rnd_h + lq_patchsize, rnd_w:rnd_w + lq_patchsize, :]
+
+    rnd_h_H, rnd_w_H = int(rnd_h * sf), int(rnd_w * sf)
+    hq = hq[rnd_h_H:rnd_h_H + lq_patchsize * sf, rnd_w_H:rnd_w_H + lq_patchsize * sf, :]
+    return lq, hq
+
+
+def degradation_bsrgan(img, sf=4, lq_patchsize=72, isp_model=None):
+    """
+    This is the degradation model of BSRGAN from the paper
+    "Designing a Practical Degradation Model for Deep Blind Image Super-Resolution"
+    ----------
+    img: HXWXC, [0, 1], its size should be large than (lq_patchsizexsf)x(lq_patchsizexsf)
+    sf: scale factor
+    isp_model: camera ISP model
+    Returns
+    -------
+    img: low-quality patch, size: lq_patchsizeXlq_patchsizeXC, range: [0, 1]
+    hq: corresponding high-quality patch, size: (lq_patchsizexsf)X(lq_patchsizexsf)XC, range: [0, 1]
+    """
+    isp_prob, jpeg_prob, scale2_prob = 0.25, 0.9, 0.25
+    sf_ori = sf
+
+    h1, w1 = img.shape[:2]
+    img = img.copy()[:w1 - w1 % sf, :h1 - h1 % sf, ...]  # mod crop
+    h, w = img.shape[:2]
+
+    if h < lq_patchsize * sf or w < lq_patchsize * sf:
+        raise ValueError(f'img size ({h1}X{w1}) is too small!')
+
+    hq = img.copy()
+
+    if sf == 4 and random.random() < scale2_prob:  # downsample1
+        if np.random.rand() < 0.5:
+            img = cv2.resize(img, (int(1 / 2 * img.shape[1]), int(1 / 2 * img.shape[0])),
+                             interpolation=random.choice([1, 2, 3]))
+        else:
+            img = util.imresize_np(img, 1 / 2, True)
+        img = np.clip(img, 0.0, 1.0)
+        sf = 2
+
+    shuffle_order = random.sample(range(7), 7)
+    idx1, idx2 = shuffle_order.index(2), shuffle_order.index(3)
+    if idx1 > idx2:  # keep downsample3 last
+        shuffle_order[idx1], shuffle_order[idx2] = shuffle_order[idx2], shuffle_order[idx1]
+
+    for i in shuffle_order:
+
+        if i == 0:
+            img = add_blur(img, sf=sf)
+
+        elif i == 1:
+            img = add_blur(img, sf=sf)
+
+        elif i == 2:
+            a, b = img.shape[1], img.shape[0]
+            # downsample2
+            if random.random() < 0.75:
+                sf1 = random.uniform(1, 2 * sf)
+                img = cv2.resize(img, (int(1 / sf1 * img.shape[1]), int(1 / sf1 * img.shape[0])),
+                                 interpolation=random.choice([1, 2, 3]))
+            else:
+                k = fspecial('gaussian', 25, random.uniform(0.1, 0.6 * sf))
+                k_shifted = shift_pixel(k, sf)
+                k_shifted = k_shifted / k_shifted.sum()  # blur with shifted kernel
+                img = ndimage.filters.convolve(img, np.expand_dims(k_shifted, axis=2), mode='mirror')
+                img = img[0::sf, 0::sf, ...]  # nearest downsampling
+            img = np.clip(img, 0.0, 1.0)
+
+        elif i == 3:
+            # downsample3
+            img = cv2.resize(img, (int(1 / sf * a), int(1 / sf * b)), interpolation=random.choice([1, 2, 3]))
+            img = np.clip(img, 0.0, 1.0)
+
+        elif i == 4:
+            # add Gaussian noise
+            img = add_Gaussian_noise(img, noise_level1=2, noise_level2=8)
+
+        elif i == 5:
+            # add JPEG noise
+            if random.random() < jpeg_prob:
+                img = add_JPEG_noise(img)
+
+        elif i == 6:
+            # add processed camera sensor noise
+            if random.random() < isp_prob and isp_model is not None:
+                with torch.no_grad():
+                    img, hq = isp_model.forward(img.copy(), hq)
+
+    # add final JPEG compression noise
+    img = add_JPEG_noise(img)
+
+    # random crop
+    img, hq = random_crop(img, hq, sf_ori, lq_patchsize)
+
+    return img, hq
+
+
+# todo no isp_model?
+def degradation_bsrgan_variant(image, sf=4, isp_model=None):
+    """
+    This is the degradation model of BSRGAN from the paper
+    "Designing a Practical Degradation Model for Deep Blind Image Super-Resolution"
+    ----------
+    sf: scale factor
+    isp_model: camera ISP model
+    Returns
+    -------
+    img: low-quality patch, size: lq_patchsizeXlq_patchsizeXC, range: [0, 1]
+    hq: corresponding high-quality patch, size: (lq_patchsizexsf)X(lq_patchsizexsf)XC, range: [0, 1]
+    """
+    image = util.uint2single(image)
+    isp_prob, jpeg_prob, scale2_prob = 0.25, 0.9, 0.25
+    sf_ori = sf
+
+    h1, w1 = image.shape[:2]
+    image = image.copy()[:w1 - w1 % sf, :h1 - h1 % sf, ...]  # mod crop
+    h, w = image.shape[:2]
+
+    hq = image.copy()
+
+    if sf == 4 and random.random() < scale2_prob:  # downsample1
+        if np.random.rand() < 0.5:
+            image = cv2.resize(image, (int(1 / 2 * image.shape[1]), int(1 / 2 * image.shape[0])),
+                               interpolation=random.choice([1, 2, 3]))
+        else:
+            image = util.imresize_np(image, 1 / 2, True)
+        image = np.clip(image, 0.0, 1.0)
+        sf = 2
+
+    shuffle_order = random.sample(range(7), 7)
+    idx1, idx2 = shuffle_order.index(2), shuffle_order.index(3)
+    if idx1 > idx2:  # keep downsample3 last
+        shuffle_order[idx1], shuffle_order[idx2] = shuffle_order[idx2], shuffle_order[idx1]
+
+    for i in shuffle_order:
+
+        if i == 0:
+            image = add_blur(image, sf=sf)
+
+        # elif i == 1:
+        #     image = add_blur(image, sf=sf)
+
+        if i == 0:
+            pass
+
+        elif i == 2:
+            a, b = image.shape[1], image.shape[0]
+            # downsample2
+            if random.random() < 0.8:
+                sf1 = random.uniform(1, 2 * sf)
+                image = cv2.resize(image, (int(1 / sf1 * image.shape[1]), int(1 / sf1 * image.shape[0])),
+                                   interpolation=random.choice([1, 2, 3]))
+            else:
+                k = fspecial('gaussian', 25, random.uniform(0.1, 0.6 * sf))
+                k_shifted = shift_pixel(k, sf)
+                k_shifted = k_shifted / k_shifted.sum()  # blur with shifted kernel
+                image = ndimage.filters.convolve(image, np.expand_dims(k_shifted, axis=2), mode='mirror')
+                image = image[0::sf, 0::sf, ...]  # nearest downsampling
+
+            image = np.clip(image, 0.0, 1.0)
+
+        elif i == 3:
+            # downsample3
+            image = cv2.resize(image, (int(1 / sf * a), int(1 / sf * b)), interpolation=random.choice([1, 2, 3]))
+            image = np.clip(image, 0.0, 1.0)
+
+        elif i == 4:
+            # add Gaussian noise
+            image = add_Gaussian_noise(image, noise_level1=1, noise_level2=2)
+
+        elif i == 5:
+            # add JPEG noise
+            if random.random() < jpeg_prob:
+                image = add_JPEG_noise(image)
+        #
+        # elif i == 6:
+        #     # add processed camera sensor noise
+        #     if random.random() < isp_prob and isp_model is not None:
+        #         with torch.no_grad():
+        #             img, hq = isp_model.forward(img.copy(), hq)
+
+    # add final JPEG compression noise
+    image = add_JPEG_noise(image)
+    image = util.single2uint(image)
+    example = {"image": image}
+    return example
+
+
+
+
+if __name__ == '__main__':
+    print("hey")
+    img = util.imread_uint('utils/test.png', 3)
+    img = img[:448, :448]
+    h = img.shape[0] // 4
+    print("resizing to", h)
+    sf = 4
+    deg_fn = partial(degradation_bsrgan_variant, sf=sf)
+    for i in range(20):
+        print(i)
+        img_hq = img
+        img_lq = deg_fn(img)["image"]
+        img_hq, img_lq = util.uint2single(img_hq), util.uint2single(img_lq)
+        print(img_lq)
+        img_lq_bicubic = albumentations.SmallestMaxSize(max_size=h, interpolation=cv2.INTER_CUBIC)(image=img_hq)["image"]
+        print(img_lq.shape)
+        print("bicubic", img_lq_bicubic.shape)
+        print(img_hq.shape)
+        lq_nearest = cv2.resize(util.single2uint(img_lq), (int(sf * img_lq.shape[1]), int(sf * img_lq.shape[0])),
+                                interpolation=0)
+        lq_bicubic_nearest = cv2.resize(util.single2uint(img_lq_bicubic),
+                                        (int(sf * img_lq.shape[1]), int(sf * img_lq.shape[0])),
+                                        interpolation=0)
+        img_concat = np.concatenate([lq_bicubic_nearest, lq_nearest, util.single2uint(img_hq)], axis=1)
+        util.imsave(img_concat, str(i) + '.png')