text: import os, sys, datetime
  import numpy as np
  import os.path as osp
  import cv2
  import insightface
  from insightface.app import MaskRenderer
  
  
  if __name__ == "__main__":
      #make sure that you have download correct insightface model pack.
      #make sure that BFM.mat and BFM_UV.mat have been generated
      tool = MaskRenderer()
      tool.prepare(ctx_id=0, det_size=(128,128))
      image = cv2.imread("../../deploy/Tom_Hanks_54745.png")
      mask_image  = "mask_blue"
      params = tool.build_params(image)
      mask_out = tool.render_mask(image, mask_image, params)
  
      cv2.imwrite('output_mask.jpg', mask_out)
  
  
  