用AAM算法进行人脸特征点的标定，即对人脸的眼睛，眉毛，嘴巴，鼻子及脸的轮廓进行标记，此代码标记了68个特征点-For face feature point calibration with AAM algorithm, namely the human face of the eyes, eyebrows, mouth, nose and face contour mark, this code marking the 68 feature points