code: def _brief_loop(image, descriptors, keypoints, pos0, pos1):
      for k in range(len(keypoints)):
          kr, kc = keypoints[k]
          for p in range(len(pos0)):
              pr0, pc0 = pos0[p]
              pr1, pc1 = pos1[p]
              descriptors[k, p] = (
                  image[kr + pr0, kc + pc0] < image[kr + pr1, kc + pc1]
              )
  
label_desc: Use image node_id 1 for calling a global function with example usage: _brief_loop(image, descriptors, keypoints, pos0, pos1) without return types