code: def test_channel_normalize(self):
      transformer = ChannelNormalize(100.0, 200.0, 300.0, 2.0, 2.0, 2.0)
      self.transformer_test(transformer)
  
imports: import pytest
  import os
  from bigdl.dllib.utils.common import *
  from bigdl.dllib.feature.transform.vision.image import *
  import tempfile
label_desc: Use image node_id 19 for calling the TestLayer obj's underlying member method code with example usage: obj.test_channel_normalize() without return types