采用Daubechie小波，构建正交矩阵，对bmp图像进行小波变换后的基本重建恢复，需要下采样，压缩为64*64以下的图像，重构图像与原图基本一致。-Daubechie wavelet to construct the orthogonal matrix, bmp image to restore the basic reconstruction after wavelet transform, sampling, compressed into less than 64* 64 images,