Image Compression A collection of simple routines for image compression using different techniques. 图象压缩的不同方法 BTCODE: Image compression Using Block Truncation Coding. PYRAMID: Image compression based on Gaussian Pyramids. DCTC

128点的小波变换，小波函数采用db3，变换过程采用FFT圆周卷积快速实现卷积过程。-128-point wavelet transform, wavelet function using db3 conversion process using the FFT circular convolution convolution process quickly.