class_docstr: modified from https://github.com/jorge-pessoa/pytorch-msssim
class_docstr_tok: ["modified","from","https",":","\/\/github.com\/jorge-pessoa\/pytorch-msssim"]
code: def __init__(self, des="structural similarity index"):
      self.des = des
  
imports: import math
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 1 to create a new SSIM object from inherited base classes: object with example: obj = SSIM(des)