说明：  该课题为基于MATLAB的教室人数统计，带有丰富的人机交互GUI界面。实现教室人数的计数统计，进而统计出勤率，上课认真听讲的比例。原先预设总人数，未出勤或者书本遮住脸部、趴着玩手机等必然无法采集到人脸，从而对应数量缺失，得出出勤率或听讲率。该课题采用肤色原理进行人脸定位和人脸分割。本课题中，为了界面GUI的美观，刻意将分割出的人脸单独显示在GUI对应的axes里。是个不错的设计选题。
(This topic is based on MATLAB classroom statistics, with rich human-computer interaction GUI interface. Realize the counting statistics of the number of students in the classroom, and then count the attendance rate and the proportion of listening carefully in class. The original preset total number of people, no attendance or books cover the face, prone to play mobile phones, etc. will not be able to collect the face, thus the corresponding number of missing, get attendance rate or listening rate. This project uses skin color principle to locate and segment face. In this project, for the sake of the beauty of GUI, the separated faces are displayed in axes corresponding to GUI. It's a good design topic.)