code: def variance_of_laplacian(image: np.ndarray) -> np.ndarray:
      """Compute the variance of the Laplacian which measure the focus."""
      gray = cv2.cvtColor(image, cv2.COLOR_RGB2GRAY)
      return cv2.Laplacian(gray, cv2.CVX_64F).var()
  
imports: import math
  from typing import Tuple
  from absl import logging
  import cv2
  import imageio
  import numpy
  from PIL import Image
  from nerfies import gpath
  from nerfies import types
label_desc: Use image node_id 6 for calling a global function with example usage: variance_of_laplacian(image) and returns: cv2