Adaboost实现人脸检测，这个很好用，速度快，准确-Adaboost face detection to achieve this good use, fast, accurate

用Adaboost和PCA算法实现人脸识别，用Python写的代码，根据经典的PCA和SVM算法改编(Adaboost and PCA algorithm for face recognition, code written in Python, adapted from the classic PCA and SVM algorithm)