Gabor小波变换与PCA的人脸识别代码，包括最后计算压缩图像的峰值信噪比和压缩效果的源码,ML法能够很好的估计信号的信噪比。- Gabor wavelet transform and PCA face recognition code, Including the final calculation of the compressed image peak signal to noise ratio and compression of the source, ML estimation me