Abstract: Calling the roll used to be manual statistics, which is wasting time in class. The class attendance system based on image can not only save time but also improve the intelligence of school management. The whole image class roll-call system can be divided into five functional modules：training student's face model module, image model module which can detect class face, image of loading detection for face recognition module and the results of the data display and so on. A system can save a lot of time and make class attendance more rapid and efficient, so as to improve the teaching quality and manage student attendance record more intelligently.

Key words: face recognition, OpenCV, eigenfaces, class attendance