对一幅二维图像采用预测编码（DPCM）、小波变换等不同方法进行压缩的代码。-a pair of two-dimensional images using predictive coding (DPCM), the wavelet transform different method of code compression.

三层二维小波变换在压缩领域的应用，将一幅256*256的图像压缩为76*76-Three-two-dimensional wavelet transform in compression applications, will be a 256* 256 image compression for the 76* 76

小波变换程序，用于对一维信号，二维信号进行稀疏变换-wavelet transform