基于K-L变换的人脸识别技术主要思想是：提取输入人脸图像矩阵的特征向量，并与图像数据库中样本特征的向量求欧氏距离，距离小于阈值时便认为识别成功。本程序即为利用K-L原理实现人脸检测的实例。-The main idea of ​ ​ the face recognition technology based on KL transform is: extract the matrix of the input face image feature vectors and Euclidean distance, the distance is less than the threshold sample feature vector image database and thinks that the recognition success. The program is the use of the KL the principle face detection instance.