docstr: A 100x100 grayscale frame to be used for SSIM
docstr_tok: ["A","100x100","grayscale","frame","to","be","used","for","SSIM"]
code: def ssim_frame(self):
      """A 100x100 grayscale frame to be used for SSIM"""
  
      if "ssim" not in self.frame_variants:
          self.frame_variants["ssim"] = self._to_ssim()
  
      return self.frame_variants["ssim"]
  
imports: import skimage.color
  import skimage.measure
  import skimage.transform
  import skimage.filters
  import skimage.morphology
  import numpy
  import io
  from PIL import Image
label_desc: Use image node_id 8 for calling the GameFrame obj's underlying member method code with example usage: obj.ssim_frame() and returns: self