说明：   这里不光有AdaBoost算法本身的实现，而且还包含利用特征模板从人脸提取特征值的代码，让大家轻松掌握利用AdaBoost进行人脸识别的全过程。
(AdaBoost algorithm here not only has its own implementation, but also includes the use of the characteristics of the template from the extracted features of face value of the code, so that everyone using AdaBoost to easily grasp the entire process of face recognition.)