经典的二维小波变换的例子，可以低通，高通滤波和取低频或高频灰度等，非常有价值！-The classic example of two-dimensional wavelet transform, can be low pass, high pass filter and take low-or high-frequency gray, etc., is very valuable!

多层次二位图像 快速小波变换 实例 自己手写- WAVEBACK Performs a multi-level two-dimensional inverse FWT.

根据个人对小波的理解，用卷积进行小波分解的一个简单小程序，有助于理解。-Based on personal understanding of Wavelet , I write a simple little program by myself that use convolution to do a wavelet decomposition，it can help to understand.

FWT based image compression