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import os
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import gc
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import imageio
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import inspect
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import numpy as np
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import torch
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import torchvision
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import cv2
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from einops import rearrange
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from PIL import Image
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def filter_kwargs(cls, kwargs):
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sig = inspect.signature(cls.__init__)
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valid_params = set(sig.parameters.keys()) - {'self', 'cls'}
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filtered_kwargs = {k: v for k, v in kwargs.items() if k in valid_params}
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return filtered_kwargs
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def get_width_and_height_from_image_and_base_resolution(image, base_resolution):
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target_pixels = int(base_resolution) * int(base_resolution)
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original_width, original_height = Image.open(image).size
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ratio = (target_pixels / (original_width * original_height)) ** 0.5
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width_slider = round(original_width * ratio)
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height_slider = round(original_height * ratio)
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return height_slider, width_slider
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def color_transfer(sc, dc):
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"""
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Transfer color distribution from of sc, referred to dc.
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Args:
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sc (numpy.ndarray): input image to be transfered.
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dc (numpy.ndarray): reference image
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Returns:
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numpy.ndarray: Transferred color distribution on the sc.
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"""
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def get_mean_and_std(img):
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x_mean, x_std = cv2.meanStdDev(img)
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x_mean = np.hstack(np.around(x_mean, 2))
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x_std = np.hstack(np.around(x_std, 2))
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return x_mean, x_std
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sc = cv2.cvtColor(sc, cv2.COLOR_RGB2LAB)
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s_mean, s_std = get_mean_and_std(sc)
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dc = cv2.cvtColor(dc, cv2.COLOR_RGB2LAB)
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t_mean, t_std = get_mean_and_std(dc)
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img_n = ((sc - s_mean) * (t_std / s_std)) + t_mean
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np.putmask(img_n, img_n > 255, 255)
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np.putmask(img_n, img_n < 0, 0)
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dst = cv2.cvtColor(cv2.convertScaleAbs(img_n), cv2.COLOR_LAB2RGB)
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return dst
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def save_videos_grid(videos: torch.Tensor, path: str, rescale=False, n_rows=6, fps=12, imageio_backend=True, color_transfer_post_process=False):
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videos = rearrange(videos, "b c t h w -> t b c h w")
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outputs = []
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for x in videos:
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x = torchvision.utils.make_grid(x, nrow=n_rows)
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x = x.transpose(0, 1).transpose(1, 2).squeeze(-1)
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if rescale:
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x = (x + 1.0) / 2.0
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x = (x * 255).numpy().astype(np.uint8)
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outputs.append(Image.fromarray(x))
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if color_transfer_post_process:
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for i in range(1, len(outputs)):
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outputs[i] = Image.fromarray(color_transfer(np.uint8(outputs[i]), np.uint8(outputs[0])))
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os.makedirs(os.path.dirname(path), exist_ok=True)
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if imageio_backend:
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if path.endswith("mp4"):
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imageio.mimsave(path, outputs, fps=fps)
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else:
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imageio.mimsave(path, outputs, duration=(1000 * 1/fps))
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else:
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if path.endswith("mp4"):
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path = path.replace('.mp4', '.gif')
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outputs[0].save(path, format='GIF', append_images=outputs, save_all=True, duration=100, loop=0)
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def get_image_to_video_latent(validation_image_start, validation_image_end, video_length, sample_size):
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if validation_image_start is not None and validation_image_end is not None:
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if type(validation_image_start) is str and os.path.isfile(validation_image_start):
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image_start = clip_image = Image.open(validation_image_start).convert("RGB")
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image_start = image_start.resize([sample_size[1], sample_size[0]])
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clip_image = clip_image.resize([sample_size[1], sample_size[0]])
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else:
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image_start = clip_image = validation_image_start
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image_start = [_image_start.resize([sample_size[1], sample_size[0]]) for _image_start in image_start]
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clip_image = [_clip_image.resize([sample_size[1], sample_size[0]]) for _clip_image in clip_image]
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if type(validation_image_end) is str and os.path.isfile(validation_image_end):
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image_end = Image.open(validation_image_end).convert("RGB")
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image_end = image_end.resize([sample_size[1], sample_size[0]])
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else:
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image_end = validation_image_end
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image_end = [_image_end.resize([sample_size[1], sample_size[0]]) for _image_end in image_end]
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if type(image_start) is list:
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clip_image = clip_image[0]
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start_video = torch.cat(
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[torch.from_numpy(np.array(_image_start)).permute(2, 0, 1).unsqueeze(1).unsqueeze(0) for _image_start in image_start],
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dim=2
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)
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input_video = torch.tile(start_video[:, :, :1], [1, 1, video_length, 1, 1])
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input_video[:, :, :len(image_start)] = start_video
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input_video_mask = torch.zeros_like(input_video[:, :1])
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input_video_mask[:, :, len(image_start):] = 255
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else:
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input_video = torch.tile(
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torch.from_numpy(np.array(image_start)).permute(2, 0, 1).unsqueeze(1).unsqueeze(0),
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[1, 1, video_length, 1, 1]
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)
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input_video_mask = torch.zeros_like(input_video[:, :1])
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input_video_mask[:, :, 1:] = 255
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if type(image_end) is list:
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image_end = [_image_end.resize(image_start[0].size if type(image_start) is list else image_start.size) for _image_end in image_end]
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end_video = torch.cat(
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[torch.from_numpy(np.array(_image_end)).permute(2, 0, 1).unsqueeze(1).unsqueeze(0) for _image_end in image_end],
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dim=2
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)
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input_video[:, :, -len(end_video):] = end_video
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input_video_mask[:, :, -len(image_end):] = 0
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else:
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image_end = image_end.resize(image_start[0].size if type(image_start) is list else image_start.size)
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input_video[:, :, -1:] = torch.from_numpy(np.array(image_end)).permute(2, 0, 1).unsqueeze(1).unsqueeze(0)
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input_video_mask[:, :, -1:] = 0
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input_video = input_video / 255
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elif validation_image_start is not None:
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if type(validation_image_start) is str and os.path.isfile(validation_image_start):
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image_start = clip_image = Image.open(validation_image_start).convert("RGB")
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image_start = image_start.resize([sample_size[1], sample_size[0]])
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clip_image = clip_image.resize([sample_size[1], sample_size[0]])
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else:
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image_start = clip_image = validation_image_start
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image_start = [_image_start.resize([sample_size[1], sample_size[0]]) for _image_start in image_start]
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clip_image = [_clip_image.resize([sample_size[1], sample_size[0]]) for _clip_image in clip_image]
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image_end = None
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if type(image_start) is list:
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clip_image = clip_image[0]
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start_video = torch.cat(
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[torch.from_numpy(np.array(_image_start)).permute(2, 0, 1).unsqueeze(1).unsqueeze(0) for _image_start in image_start],
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dim=2
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)
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input_video = torch.tile(start_video[:, :, :1], [1, 1, video_length, 1, 1])
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input_video[:, :, :len(image_start)] = start_video
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input_video = input_video / 255
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input_video_mask = torch.zeros_like(input_video[:, :1])
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input_video_mask[:, :, len(image_start):] = 255
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else:
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input_video = torch.tile(
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torch.from_numpy(np.array(image_start)).permute(2, 0, 1).unsqueeze(1).unsqueeze(0),
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[1, 1, video_length, 1, 1]
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) / 255
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input_video_mask = torch.zeros_like(input_video[:, :1])
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input_video_mask[:, :, 1:, ] = 255
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else:
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image_start = None
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image_end = None
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input_video = torch.zeros([1, 3, video_length, sample_size[0], sample_size[1]])
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input_video_mask = torch.ones([1, 1, video_length, sample_size[0], sample_size[1]]) * 255
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clip_image = None
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del image_start
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del image_end
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gc.collect()
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return input_video, input_video_mask, clip_image
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def get_video_to_video_latent(input_video_path, video_length, sample_size, fps=None, validation_video_mask=None):
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if isinstance(input_video_path, str):
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cap = cv2.VideoCapture(input_video_path)
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input_video = []
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original_fps = cap.get(cv2.CAP_PROP_FPS)
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frame_skip = 1 if fps is None else int(original_fps // fps)
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frame_count = 0
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while True:
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ret, frame = cap.read()
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if not ret:
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break
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if frame_count % frame_skip == 0:
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frame = cv2.resize(frame, (sample_size[1], sample_size[0]))
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input_video.append(cv2.cvtColor(frame, cv2.COLOR_BGR2RGB))
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frame_count += 1
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cap.release()
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else:
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input_video = input_video_path
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input_video = torch.from_numpy(np.array(input_video))[:video_length]
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input_video = input_video.permute([3, 0, 1, 2]).unsqueeze(0) / 255
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if validation_video_mask is not None:
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validation_video_mask = Image.open(validation_video_mask).convert('L').resize((sample_size[1], sample_size[0]))
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input_video_mask = np.where(np.array(validation_video_mask) < 240, 0, 255)
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input_video_mask = torch.from_numpy(np.array(input_video_mask)).unsqueeze(0).unsqueeze(-1).permute([3, 0, 1, 2]).unsqueeze(0)
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input_video_mask = torch.tile(input_video_mask, [1, 1, input_video.size()[2], 1, 1])
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input_video_mask = input_video_mask.to(input_video.device, input_video.dtype)
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else:
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input_video_mask = torch.zeros_like(input_video[:, :1])
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input_video_mask[:, :, :] = 255
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return input_video, input_video_mask, None |
