code: def get_frames_singleimage(self):
          
          frame = self.captures[0].read()[1]
          height, width, colors = frame.shape
          left_frame = frame[:, :width/2, :]
          right_frame = frame[:, width/2:, :]
          return [left_frame, right_frame]
docs: Get current left and right frames from a single image,
          by splitting the image in half.