There is a well attenuation curve as input to calculate its seismic waves, Combined with PCA scale invariant feature transform (SIFT) algorithm, Least-squares regression analysis algorithm.

这篇文章是撸主要介绍人脸识别经典方法的第一篇，后续会有其他方法更新。特征脸方法基本是将人脸识别推向真正可用的第一种方法，了解一下还是很有必要的(This article is the first line mainly introduces classical face recognition methods, the follow-up there will be other methods to update. The feature face method is basically the

把彩图转换成灰度图片，可以在人脸识别领域用PCA的方法。(Convert the color map to grayscale image.PCA can be used in face recognition field.)