# -- coding: utf-8 --** import cv2 import torch import os, glob import numpy as np import gradio as gr from PIL import Image from omegaconf import OmegaConf from contextlib import nullcontext from pytorch_lightning import seed_everything from os.path import join as ospj from random import randint from torchvision.utils import save_image from torchvision.transforms import Resize from util import * def process(image, mask): img_h, img_w = image.shape[:2] mask = mask[...,:1]//255 contours, _ = cv2.findContours(mask, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE) if len(contours) != 1: raise gr.Error("One masked area only!") m_x, m_y, m_w, m_h = cv2.boundingRect(contours[0]) c_x, c_y = m_x + m_w//2, m_y + m_h//2 if img_w > img_h: if m_w > img_h: raise gr.Error("Illegal mask area!") if c_x < img_w - c_x: c_l = max(0, c_x - img_h//2) c_r = c_l + img_h else: c_r = min(img_w, c_x + img_h//2) c_l = c_r - img_h image = image[:,c_l:c_r,:] mask = mask[:,c_l:c_r,:] else: if m_h > img_w: raise gr.Error("Illegal mask area!") if c_y < img_h - c_y: c_t = max(0, c_y - img_w//2) c_b = c_t + img_w else: c_b = min(img_h, c_y + img_w//2) c_t = c_b - img_w image = image[c_t:c_b,:,:] mask = mask[c_t:c_b,:,:] image = torch.from_numpy(image.transpose(2,0,1)).to(dtype=torch.float32) / 127.5 - 1.0 mask = torch.from_numpy(mask.transpose(2,0,1)).to(dtype=torch.float32) image = resize(image[None])[0] mask = resize(mask[None])[0] masked = image * (1 - mask) return image, mask, masked def predict(cfgs, model, sampler, batch): context = nullcontext if cfgs.aae_enabled else torch.no_grad with context(): batch, batch_uc_1 = prepare_batch(cfgs, batch) c, uc_1 = model.conditioner.get_unconditional_conditioning( batch, batch_uc=batch_uc_1, force_uc_zero_embeddings=cfgs.force_uc_zero_embeddings, ) x = sampler.get_init_noise(cfgs, model, cond=c, batch=batch, uc=uc_1) samples_z = sampler(model, x, cond=c, batch=batch, uc=uc_1, init_step=0, aae_enabled = cfgs.aae_enabled, detailed = cfgs.detailed) samples_x = model.decode_first_stage(samples_z) samples = torch.clamp((samples_x + 1.0) / 2.0, min=0.0, max=1.0) return samples, samples_z def demo_predict(input_blk, text, num_samples, steps, scale, seed, show_detail): global cfgs, global_index if len(text) < cfgs.txt_len[0] or len(text) > cfgs.txt_len[1]: raise gr.Error("Illegal text length!") global_index += 1 if num_samples > 1: cfgs.noise_iters = 0 cfgs.batch_size = num_samples cfgs.steps = steps cfgs.scale[0] = scale cfgs.detailed = show_detail seed_everything(seed) sampler.num_steps = steps sampler.guider.scale_value = scale image = input_blk["image"] mask = input_blk["mask"] image, mask, masked = process(image, mask) seg_mask = torch.cat((torch.ones(len(text)), torch.zeros(cfgs.seq_len-len(text)))) # additional cond txt = f"\"{text}\"" original_size_as_tuple = torch.tensor((cfgs.H, cfgs.W)) crop_coords_top_left = torch.tensor((0, 0)) target_size_as_tuple = torch.tensor((cfgs.H, cfgs.W)) image = torch.tile(image[None], (num_samples, 1, 1, 1)) mask = torch.tile(mask[None], (num_samples, 1, 1, 1)) masked = torch.tile(masked[None], (num_samples, 1, 1, 1)) seg_mask = torch.tile(seg_mask[None], (num_samples, 1)) original_size_as_tuple = torch.tile(original_size_as_tuple[None], (num_samples, 1)) crop_coords_top_left = torch.tile(crop_coords_top_left[None], (num_samples, 1)) target_size_as_tuple = torch.tile(target_size_as_tuple[None], (num_samples, 1)) text = [text for i in range(num_samples)] txt = [txt for i in range(num_samples)] name = [str(global_index) for i in range(num_samples)] batch = { "image": image, "mask": mask, "masked": masked, "seg_mask": seg_mask, "label": text, "txt": txt, "original_size_as_tuple": original_size_as_tuple, "crop_coords_top_left": crop_coords_top_left, "target_size_as_tuple": target_size_as_tuple, "name": name } samples, samples_z = predict(cfgs, model, sampler, batch) samples = samples.cpu().numpy().transpose(0, 2, 3, 1) * 255 results = [Image.fromarray(sample.astype(np.uint8)) for sample in samples] if cfgs.detailed: sections = [] attn_map = Image.open(f"./temp/attn_map/attn_map_{global_index}.png") seg_maps = np.load(f"./temp/seg_map/seg_{global_index}.npy") for i, seg_map in enumerate(seg_maps): seg_map = cv2.resize(seg_map, (cfgs.W, cfgs.H)) sections.append((seg_map, text[0][i])) seg = (results[0], sections) else: attn_map = None seg = None return results, attn_map, seg if __name__ == "__main__": os.makedirs("./temp", exist_ok=True) os.makedirs("./temp/attn_map", exist_ok=True) os.makedirs("./temp/seg_map", exist_ok=True) cfgs = OmegaConf.load("./configs/demo.yaml") model = init_model(cfgs) sampler = init_sampling(cfgs) global_index = 0 resize = Resize((cfgs.H, cfgs.W)) block = gr.Blocks().queue() with block: with gr.Row(): gr.HTML( """

UDiffText: A Unified Framework for High-quality Text Synthesis in Arbitrary Images via Character-aware Diffusion Models

Our proposed UDiffText is capable of synthesizing accurate and harmonious text in either synthetic or real-word images, thus can be applied to tasks like scene text editing (a), arbitrary text generation (b) and accurate T2I generation (c)

UDiffText
""" ) with gr.Row(): with gr.Column(): input_blk = gr.Image(source='upload', tool='sketch', type="numpy", label="Input", height=512) gr.Markdown("Notice: please draw horizontally to indicate only **one** masked area.") text = gr.Textbox(label="Text to render: (1~12 characters)", info="the text you want to render at the masked region") run_button = gr.Button(variant="primary") with gr.Accordion("Advanced options", open=False): num_samples = gr.Slider(label="Images", info="number of generated images, locked as 1", minimum=1, maximum=1, value=1, step=1) steps = gr.Slider(label="Steps", info ="denoising sampling steps", minimum=1, maximum=200, value=50, step=1) scale = gr.Slider(label="Guidance Scale", info="the scale of classifier-free guidance (CFG)", minimum=0.0, maximum=10.0, value=5.0, step=0.1) seed = gr.Slider(label="Seed", info="random seed for noise initialization", minimum=0, maximum=2147483647, step=1, randomize=True) show_detail = gr.Checkbox(label="Show Detail", info="show the additional visualization results", value=False) with gr.Column(): gallery = gr.Gallery(label="Output", height=512, preview=True) with gr.Accordion("Visualization results", open=True): with gr.Tab(label="Attention Maps"): gr.Markdown("### Attention maps for each character (extracted from middle blocks at intermediate sampling step):") attn_map = gr.Image(show_label=False, show_download_button=False) with gr.Tab(label="Segmentation Maps"): gr.Markdown("### Character-level segmentation maps (using upscaled attention maps):") seg_map = gr.AnnotatedImage(height=384, show_label=False) # examples examples = [] example_paths = sorted(glob.glob(ospj("./demo/examples", "*"))) for example_path in example_paths: label = example_path.split(os.sep)[-1].split(".")[0].split("_")[0] examples.append([example_path, label]) gr.Markdown("## Examples:") gr.Examples( examples=examples, inputs=[input_blk, text] ) run_button.click(fn=demo_predict, inputs=[input_blk, text, num_samples, steps, scale, seed, show_detail], outputs=[gallery, attn_map, seg_map]) block.launch()