maskrcnn_benchmark理解记录：Modeling > ROI Heads > Keypoint Head (Python Implementation)

 1)  x = make_roi_keypoint_feature_extractor(cfg, in_channels)(features, proposals)

    
 2)  kp_logits= make_roi_keypoint_predictor(cfg, self.feature_extractor.out_channels)(x)
    
 self.feature_extractor.out_channels=512
    
 3)  post_processor = make_roi_keypoint_post_processor(cfg)
    
 4)  loss_evaluator = make_roi_keypoint_loss_evaluator(cfg)
    
  
    
 5） 训练：loss_kp = self.loss_evaluator(proposals, kp_logits)
    
      也就是loss_kp =make_roi_keypoint_loss_evaluator(cfg)(proposals, kp_logits)
    
      return x, proposals, dict(loss_kp=loss_kp