def reset(self):
        """Reset the canvas to a blank image with guideline circles of various radii.
        """
        self.data = np.ones(
            (int(self._metric_height * self._pixels_per_meter), int(self._metric_width * self._pixels_per_meter), 3),
            dtype=np.uint8
        ) * self._bg_clr

        # Draw metric polar grid
        for i in range(1, int(max(self._metric_width, self._metric_height)) // self._polar_step_size_meters):
            cv2.circle(
                self.data, self._center_pixel, int(i * self._polar_step_size_meters * self._pixels_per_meter),
                (50, 50, 50), 2
            )
Reset the canvas to a blank image with guideline circles of various radii.
        
tridet/visualizers/bev.py