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 method can be a good signal to noise ratio.