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| # Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved. | |
| # | |
| # NVIDIA CORPORATION and its licensors retain all intellectual property | |
| # and proprietary rights in and to this software, related documentation | |
| # and any modifications thereto. Any use, reproduction, disclosure or | |
| # distribution of this software and related documentation without an express | |
| # license agreement from NVIDIA CORPORATION is strictly prohibited. | |
| """Generate images using pretrained network pickle.""" | |
| import os | |
| import re | |
| import random | |
| import math | |
| import time | |
| import click | |
| import legacy | |
| from typing import List, Optional | |
| import cv2 | |
| import clip | |
| import dnnlib | |
| import numpy as np | |
| import torchvision | |
| from torchvision.transforms import Compose, Resize, CenterCrop, ToTensor, Normalize | |
| import PIL.Image | |
| import matplotlib.pyplot as plt | |
| import torch | |
| from torch import linalg as LA | |
| import torch.nn.functional as F | |
| from torch_utils import misc | |
| from torch_utils import persistence | |
| from torch_utils.ops import conv2d_resample | |
| from torch_utils.ops import upfirdn2d | |
| from torch_utils.ops import bias_act | |
| from torch_utils.ops import fma | |
| def block_forward(self, x, img, ws, shapes, force_fp32=False, fused_modconv=None, **layer_kwargs): | |
| misc.assert_shape(ws, [None, self.num_conv + self.num_torgb, self.w_dim]) | |
| w_iter = iter(ws.unbind(dim=1)) | |
| dtype = torch.float16 if self.use_fp16 and not force_fp32 else torch.float32 | |
| memory_format = torch.channels_last if self.channels_last and not force_fp32 else torch.contiguous_format | |
| if fused_modconv is None: | |
| with misc.suppress_tracer_warnings(): # this value will be treated as a constant | |
| fused_modconv = (not self.training) and (dtype == torch.float32 or int(x.shape[0]) == 1) | |
| # Input. | |
| if self.in_channels == 0: | |
| x = self.const.to(dtype=dtype, memory_format=memory_format) | |
| x = x.unsqueeze(0).repeat([ws.shape[0], 1, 1, 1]) | |
| else: | |
| misc.assert_shape(x, [None, self.in_channels, self.resolution // 2, self.resolution // 2]) | |
| x = x.to(dtype=dtype, memory_format=memory_format) | |
| # Main layers. | |
| if self.in_channels == 0: | |
| x = self.conv1(x, next(w_iter)[...,:shapes[0]], fused_modconv=fused_modconv, **layer_kwargs) | |
| elif self.architecture == 'resnet': | |
| y = self.skip(x, gain=np.sqrt(0.5)) | |
| x = self.conv0(x, next(w_iter), fused_modconv=fused_modconv, **layer_kwargs) | |
| x = self.conv1(x, next(w_iter), fused_modconv=fused_modconv, gain=np.sqrt(0.5), **layer_kwargs) | |
| x = y.add_(x) | |
| else: | |
| x = self.conv0(x, next(w_iter)[...,:shapes[0]], fused_modconv=fused_modconv, **layer_kwargs) | |
| x = self.conv1(x, next(w_iter)[...,:shapes[1]], fused_modconv=fused_modconv, **layer_kwargs) | |
| # ToRGB. | |
| if img is not None: | |
| misc.assert_shape(img, [None, self.img_channels, self.resolution // 2, self.resolution // 2]) | |
| img = upfirdn2d.upsample2d(img, self.resample_filter) | |
| if self.is_last or self.architecture == 'skip': | |
| y = self.torgb(x, next(w_iter)[...,:shapes[2]], fused_modconv=fused_modconv) | |
| y = y.to(dtype=torch.float32, memory_format=torch.contiguous_format) | |
| img = img.add_(y) if img is not None else y | |
| assert x.dtype == dtype | |
| assert img is None or img.dtype == torch.float32 | |
| return x, img | |
| def unravel_index(index, shape): | |
| out = [] | |
| for dim in reversed(shape): | |
| out.append(index % dim) | |
| index = index // dim | |
| return tuple(reversed(out)) | |
| def num_range(s: str) -> List[int]: | |
| """ | |
| Accept either a comma separated list of numbers 'a,b,c' or a range 'a-c' and return as a list of ints. | |
| """ | |
| range_re = re.compile(r'^(\d+)-(\d+)$') | |
| m = range_re.match(s) | |
| if m: | |
| return list(range(int(m.group(1)), int(m.group(2))+1)) | |
| vals = s.split(',') | |
| return [int(x) for x in vals] | |
| def generate_images( | |
| ctx: click.Context, | |
| network_pkl: str, | |
| seeds: Optional[List[int]], | |
| truncation_psi: float, | |
| noise_mode: str, | |
| outdir: str, | |
| class_idx: Optional[int], | |
| projected_w: Optional[str], | |
| s_input: Optional[str], | |
| text_prompt: str, | |
| change_power: int, | |
| from_video: bool, | |
| ): | |
| """ | |
| Generate images using pretrained network pickle. | |
| Examples: | |
| # Generate curated MetFaces images without truncation (Fig.10 left) | |
| python generate.py --outdir=out --trunc=1 --seeds=85,265,297,849 \\ | |
| --network=https://nvlabs-fi-cdn.nvidia.com/stylegan2-ada-pytorch/pretrained/metfaces.pkl | |
| # Generate uncurated MetFaces images with truncation (Fig.12 upper left) | |
| python generate.py --outdir=out --trunc=0.7 --seeds=600-605 \\ | |
| --network=https://nvlabs-fi-cdn.nvidia.com/stylegan2-ada-pytorch/pretrained/metfaces.pkl | |
| # Generate class conditional CIFAR-10 images (Fig.17 left, Car) | |
| python generate.py --outdir=out --seeds=0-35 --class=1 \\ | |
| --network=https://nvlabs-fi-cdn.nvidia.com/stylegan2-ada-pytorch/pretrained/cifar10.pkl | |
| # Render an image from projected W | |
| python generate.py --outdir=out --projected_w=projected_w.npz \\ | |
| --network=https://nvlabs-fi-cdn.nvidia.com/stylegan2-ada-pytorch/pretrained/metfaces.pkl | |
| """ | |
| print('Loading networks from "%s"...' % network_pkl) | |
| # Use GPU if available | |
| if torch.cuda.is_available(): | |
| device = torch.device("cuda") | |
| else: | |
| device = torch.device("cpu") | |
| with dnnlib.util.open_url(network_pkl) as f: | |
| G = legacy.load_network_pkl(f)['G_ema'].to(device) # type: ignore | |
| os.makedirs(outdir, exist_ok=True) | |
| # Synthesize the result of a W projection. | |
| if projected_w is not None: | |
| if seeds is not None: | |
| print ('warn: --seeds is ignored when using --projected-w') | |
| print(f'Generating images from projected W "{projected_w}"') | |
| ws = np.load(projected_w)['w'] | |
| ws = torch.tensor(ws, device=device) # pylint: disable=not-callable | |
| assert ws.shape[1:] == (G.num_ws, G.w_dim) | |
| for idx, w in enumerate(ws): | |
| img = G.synthesis(w.unsqueeze(0), noise_mode=noise_mode) | |
| img = (img.permute(0, 2, 3, 1) * 127.5 + 128).clamp(0, 255).to(torch.uint8) | |
| img = PIL.Image.fromarray(img[0].cpu().numpy(), 'RGB') | |
| img.save(f'{outdir}/proj{idx:02d}.png') | |
| return | |
| # Labels | |
| label = torch.zeros([1, G.c_dim], device=device).requires_grad_() | |
| if G.c_dim != 0: | |
| if class_idx is None: | |
| ctx.fail('Must specify class label with --class when using a conditional network') | |
| label[:, class_idx] = 1 | |
| else: | |
| if class_idx is not None: | |
| print ('warn: --class=lbl ignored when running on an unconditional network') | |
| # Generate images | |
| for i in G.parameters(): | |
| i.requires_grad = False | |
| temp_shapes = [] | |
| for res in G.synthesis.block_resolutions: | |
| block = getattr(G.synthesis, f'b{res}') | |
| if res == 4: | |
| temp_shape = (block.conv1.affine.weight.shape[0], block.conv1.affine.weight.shape[0], block.torgb.affine.weight.shape[0]) | |
| block.conv1.affine = torch.nn.Identity() | |
| block.torgb.affine = torch.nn.Identity() | |
| else: | |
| temp_shape = (block.conv0.affine.weight.shape[0], block.conv1.affine.weight.shape[0], block.torgb.affine.weight.shape[0]) | |
| block.conv0.affine = torch.nn.Identity() | |
| block.conv1.affine = torch.nn.Identity() | |
| block.torgb.affine = torch.nn.Identity() | |
| temp_shapes.append(temp_shape) | |
| if s_input is not None: | |
| styles = np.load(s_input)['s'] | |
| styles_direction = np.load(f'{outdir}/direction_'+text_prompt.replace(" ", "_")+'.npz')['s'] | |
| styles_direction = torch.tensor(styles_direction, device=device) | |
| styles = torch.tensor(styles, device=device) | |
| if from_video and not os.path.isdir(f'{outdir}_video'): | |
| os.makedirs(f'{outdir}_video') | |
| with torch.no_grad(): | |
| if from_video: | |
| name_i = 1000 | |
| for grad_change in np.arange(0, 1, 0.02)*change_power: | |
| imgs = [] | |
| name_i += 1 | |
| styles += styles_direction*grad_change | |
| styles_idx = 0 | |
| x = img = None | |
| for k , res in enumerate(G.synthesis.block_resolutions): | |
| block = getattr(G.synthesis, f'b{res}') | |
| if res == 4: | |
| x, img = block_forward(block, x, img, styles[:, styles_idx:styles_idx+2, :], temp_shapes[k], noise_mode=noise_mode, force_fp32=True) | |
| styles_idx += 2 | |
| else: | |
| x, img = block_forward(block, x, img, styles[:, styles_idx:styles_idx+3, :], temp_shapes[k], noise_mode=noise_mode, force_fp32=True) | |
| styles_idx += 3 | |
| img = (img.permute(0, 2, 3, 1) * 127.5 + 128).clamp(0, 255) | |
| imgs.append(img[0].to(torch.uint8).cpu().numpy()) | |
| styles -= styles_direction*grad_change | |
| img_filepath = '{}_video/{}_{}_{}.jpeg'.format(outdir, text_prompt.replace(" ", "_"), change_power, name_i) | |
| PIL.Image.fromarray(np.concatenate(imgs, axis=1), 'RGB').save(img_filepath, quality=95) | |
| else: | |
| imgs = [] | |
| grad_changes = [0, 0.25*change_power, 0.5*change_power, 0.75*change_power, change_power] | |
| for grad_change in grad_changes: | |
| styles += styles_direction*grad_change | |
| styles_idx = 0 | |
| x = img = None | |
| for k , res in enumerate(G.synthesis.block_resolutions): | |
| block = getattr(G.synthesis, f'b{res}') | |
| if res == 4: | |
| x, img = block_forward(block, x, img, styles[:, styles_idx:styles_idx+2, :], temp_shapes[k], noise_mode=noise_mode, force_fp32=True) | |
| styles_idx += 2 | |
| else: | |
| x, img = block_forward(block, x, img, styles[:, styles_idx:styles_idx+3, :], temp_shapes[k], noise_mode=noise_mode, force_fp32=True) | |
| styles_idx += 3 | |
| img = (img.permute(0, 2, 3, 1) * 127.5 + 128).clamp(0, 255) | |
| imgs.append(img[0].to(torch.uint8).cpu().numpy()) | |
| styles -= styles_direction*grad_change | |
| img_filepath = f'{outdir}/'+text_prompt.replace(" ", "_")+'_'+str(change_power)+'.jpeg' | |
| PIL.Image.fromarray(np.concatenate(imgs, axis=1), 'RGB').save(img_filepath, quality=95) | |
| if __name__ == "__main__": | |
| generate_images() | |