code: def put_image(self, name, val):
          
          assert isinstance(val, np.ndarray)
          arr = image_to_nhwc(val)
          self._dispatch(lambda m: m.process_image(name, arr))
          s = create_image_summary(name, arr)
          self._dispatch(lambda m: m.process_summary(s))
docs: Put an image.
  
          Args:
              name (str):
              val (np.ndarray): 2D, 3D (HWC) or 4D (NHWC) numpy array of images
                  in range [0,255]. If channel is 3, assumed to be RGB.