class_docstr: Apply Normalization to Image Pixels on GPU
      
code: def __init__(self, mean, std):
      self.mean = torch.tensor(mean).view(1, 3, 1, 1)
      self.std = torch.tensor(std).view(1, 3, 1, 1)
  
imports: from torch.utils.data import Dataset
  from torchvision.datasets.utils import download_url
  from PIL import Image
  import torch
  import numpy
  import random
  import decord
  from decord import VideoReader
  import json
  import os
  from data.utils import pre_caption
label_desc: Use image node_id 1 to create a new ImageNorm object from inherited base classes: object with example: obj = ImageNorm(mean, std)