说明：  AdaBoost即Adaptive Boosting算法，广泛用于目标检测特别是人脸识别相关领域。这个资源来自于经典教材，可信度高，绝对可用。即使不用，读读源码总是好的。
(Adaptive Boosting algorithm AdaBoost that is widely used for target detection in particular are related to the field of face recognition. This resource from the classic materials, high reliability, can be used absolutely. Even if not, by reading the source code is always nice.)