def show(self,
             drawn_img: Optional[np.ndarray] = None,
             win_name: str = 'image',
             wait_time: float = 0.,
             continue_key=' ') -> None:
        """Show the drawn image.

        Args:
            drawn_img (np.ndarray, optional): The image to show. If drawn_img
                is None, it will show the image got by Visualizer. Defaults
                to None.
            win_name (str):  The image title. Defaults to 'image'.
            wait_time (float): Delay in seconds. 0 is the special
                value that means "forever". Defaults to 0.
            continue_key (str): The key for users to continue. Defaults to
                the space key.
        """
        if self.backend == 'matplotlib':
            super().show(
                drawn_img=drawn_img,
                win_name=win_name,
                wait_time=wait_time,
                continue_key=continue_key)

        elif self.backend == 'opencv':
            # Keep images are shown in the same window, and the title of window
            # will be updated with `win_name`.
            if not hasattr(self, win_name):
                self._cv_win_name = win_name
                cv2.namedWindow(winname=f'{id(self)}')
                cv2.setWindowTitle(f'{id(self)}', win_name)
            else:
                cv2.setWindowTitle(f'{id(self)}', win_name)
            shown_img = self.get_image() if drawn_img is None else drawn_img
            cv2.imshow(str(id(self)), mmcv.bgr2rgb(shown_img))
            cv2.waitKey(int(np.ceil(wait_time * 1000)))
        else:
            raise ValueError(f'got unsupported backend {self.backend}')
Show the drawn image.

        Args:
            drawn_img (np.ndarray, optional): The image to show. If drawn_img
                is None, it will show the image got by Visualizer. Defaults
                to None.
            win_name (str):  The image title. Defaults to 'image'.
            wait_time (float): Delay in seconds. 0 is the special
                value that means "forever". Defaults to 0.
            continue_key (str): The key for users to continue. Defaults to
                the space key.
        
mmpose/mmpose/visualization/opencv_backend_visualizer.py