| 1. | Second , using the method of wavelet - transform , extract the stable second - low frequency wavelet coefficient , build face database . third , for the sake of eliminating the correlations between entities of the image vector and extracting character - vector , which keeps the main class - information and can be used to rebuild original image , the principal component analysis ( pca ) was used
对人脸库进行主成份分析，此方法根据人脸图像整体的灰度相关性来提取特征向量，所提取出的特征向量保留了原图像空间中的主要分类信息，并能在均方误差最小的意义上重建原图像。 |
