很多时候,我们需要捕捉人的微妙表情,譬如在审讯时,如果能及时捕捉到犯罪嫌疑人面部表情的微妙变化,那将大有用处。这项工作要是能交给机器人来完成,那就太好了。但因为人类的脸孔千变万化,让机器来对表情做分析是非常困难的。已有的软件仅能识别出一些极端的表情,这在实际上 In many cases, we need to capture the subtle expressions of people. For example, at the interrogation, it will be very useful if we can capture in time the subtle changes in the facial expressions of criminal suspects. If this work can be done to the robot, that would be great. However, because of the ever-changing human face, it is very difficult for the machine to analyze expressions. Existing software can only recognize some extreme expressions, which in fact