code: def _is_luv_image(tens):
      return len(tens.shape) == 3 and tens.shape[-1] == 3
  
file_path: caer/caer/color/_luv.py
imports: import cv2
  from ..coreten import Tensor, to_tensor
  from ._constants import LUV2BGR, LUV2RGB
  from ._bgr import bgr2gray, bgr2hls, bgr2hsv, bgr2lab, bgr2yuv
label_desc: Use image node_id 1 for calling a global function with example usage: _is_luv_image(tens) and returns: unknown