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| import cv2 | |
| def show_preview(flag, img, title=None): | |
| if title is None: | |
| title = flag | |
| cv2.imshow(flag, img[:, :, ::-1].copy()) | |
| cv2.setWindowTitle(flag, title) | |
| cv2.setWindowProperty(flag, cv2.WND_PROP_TOPMOST, 1) | |
| cv2.waitKey(1) | |
| def close_all_preview(): | |
| cv2.destroyAllWindows() | |