code: def __call__(self, tensor):
      tensor = (tensor - self.mean) / self.std
      return tensor
  
file_path: PaddleSeg/EISeg/eiseg/inference/predictor/ops.py
imports: import paddle
  import paddle.nn
  import numpy
label_desc: Use image node_id 2 for calling the BatchImageNormalize obj's underlying member method code with example usage: obj.__call__(tensor) and returns: tensor