import tensorflow as tf

        with tf.device("/cpu:0"):
            val_summaries.append(self._add_image_summary(self._image, self._gt_boxes))
            for key, var in self._event_summaries.items():    #添加self._losses
                val_summaries.append(tf.summary.scalar(key, var))
            for key, var in self._score_summaries.items():          #self._score_summaries.update(self._anchor_targets)   self._score_summaries.update(self._proposal_targets) 
                self._add_score_summary(key, var)    
