code: def laplacien(image):
      out_image = np.abs(
          4 * image[1:-1, 1:-1]
          - image[0:-2, 1:-1]
          - image[2:, 1:-1]
          - image[1:-1, 0:-2]
          - image[1:-1, 2:]
      )
      valmax = np.max(out_image)
      valmax = max(1.0, valmax) + 1.0e-9
      out_image /= valmax
      return out_image
  
label_desc: Use image node_id 1 for calling a global function with example usage: laplacien(image) and returns: out_image