Human facial expression recognition is a very important but also difficult subject.
人脸表情识别是模式识别中一个非常重要却十分复杂的课题。
As an important part of the technology for human-machine interface, facial expression recognition have drawn much attention recently.
人脸表情识别作为智能化人机交互技术中的一个重要组成部分，近年来得到了广泛关注。
The human-head portrait robot system H&F ROBOT-II with vision, facial expression recognition and representation functions was designed and developed.
本文设计并研制了具有视觉、表情识别与再现功能的仿人头像机器人H&F ROBOT-II系统。
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