运算量是适时人脸检测和识别的关键，本文为此提出了一种基于双特征脸空间的识别系统。
In order to accelerate processing , we present an advanced method for face detection and recognition based on double eigenface spaces .
我绝不会忘记我爸第二天早上看见这双鞋的时候脸上的表情。
I 'll never forget the look on Dad 's face the next morning when he saw those shoes .
双脸