code: def aspect_ratio(batch: List[np.ndarray]) -> List[float]:
      """Return list of floats of image height to width ratio."""
      return [x[0] / x[1] for x in _sizes(batch)]
  
imports: from typing import Dict, List, Tuple
  import numpy
  from cv2 import CV_64F, Laplacian
  from skimage.color import rgb2gray
label_desc: Use image node_id 1 for calling a global function with example usage: aspect_ratio(batch) and returns: unknown