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| import threading | |
| import cv2 | |
| buffer = [] | |
| def worker(): | |
| global buffer | |
| while True: | |
| cv2.waitKey(50) | |
| try: | |
| if len(buffer) > 0: | |
| task = buffer.pop(0) | |
| if task is None: | |
| cv2.destroyAllWindows() | |
| else: | |
| flag, img, title = task | |
| cv2.imshow(flag, img) | |
| cv2.setWindowTitle(flag, title) | |
| cv2.setWindowProperty(flag, cv2.WND_PROP_TOPMOST, 1) | |
| except Exception as e: | |
| print(e) | |
| pass | |
| def show_preview(flag, img, title='preview'): | |
| buffer.append((flag, img[..., ::-1].copy(), title)) | |
| def close_all_preview(): | |
| buffer.append(None) | |
| threading.Thread(target=worker, daemon=True).start() | |