人脸识别程序。能够检测出图像线条轮廓和像素数据，进行图片对比。-Face recognition program. Contour lines can be detected and pixel image data, image contrast.

canny边缘检测，传统边缘检测算法的研究，试图将独立边的候选像素拼装成轮廓(Edge detection; traditional algorithm)