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| import abc | |
| from typing import Dict, List | |
| import numpy as np | |
| import torch | |
| from skimage import color | |
| from skimage.segmentation import mark_boundaries | |
| from . import colors | |
| COLORS, _ = colors.generate_colors(151) # 151 - max classes for semantic segmentation | |
| class BaseVisualizer: | |
| def __call__(self, epoch_i, batch_i, batch, suffix='', rank=None): | |
| """ | |
| Take a batch, make an image from it and visualize | |
| """ | |
| raise NotImplementedError() | |
| def visualize_mask_and_images(images_dict: Dict[str, np.ndarray], keys: List[str], | |
| last_without_mask=True, rescale_keys=None, mask_only_first=None, | |
| black_mask=False) -> np.ndarray: | |
| mask = images_dict['mask'] > 0.5 | |
| result = [] | |
| for i, k in enumerate(keys): | |
| img = images_dict[k] | |
| img = np.transpose(img, (1, 2, 0)) | |
| if rescale_keys is not None and k in rescale_keys: | |
| img = img - img.min() | |
| img /= img.max() + 1e-5 | |
| if len(img.shape) == 2: | |
| img = np.expand_dims(img, 2) | |
| if img.shape[2] == 1: | |
| img = np.repeat(img, 3, axis=2) | |
| elif (img.shape[2] > 3): | |
| img_classes = img.argmax(2) | |
| img = color.label2rgb(img_classes, colors=COLORS) | |
| if mask_only_first: | |
| need_mark_boundaries = i == 0 | |
| else: | |
| need_mark_boundaries = i < len(keys) - 1 or not last_without_mask | |
| if need_mark_boundaries: | |
| if black_mask: | |
| img = img * (1 - mask[0][..., None]) | |
| img = mark_boundaries(img, | |
| mask[0], | |
| color=(1., 0., 0.), | |
| outline_color=(1., 1., 1.), | |
| mode='thick') | |
| result.append(img) | |
| return np.concatenate(result, axis=1) | |
| def visualize_mask_and_images_batch(batch: Dict[str, torch.Tensor], keys: List[str], max_items=10, | |
| last_without_mask=True, rescale_keys=None) -> np.ndarray: | |
| batch = {k: tens.detach().cpu().numpy() for k, tens in batch.items() | |
| if k in keys or k == 'mask'} | |
| batch_size = next(iter(batch.values())).shape[0] | |
| items_to_vis = min(batch_size, max_items) | |
| result = [] | |
| for i in range(items_to_vis): | |
| cur_dct = {k: tens[i] for k, tens in batch.items()} | |
| result.append(visualize_mask_and_images(cur_dct, keys, last_without_mask=last_without_mask, | |
| rescale_keys=rescale_keys)) | |
| return np.concatenate(result, axis=0) | |