A collection of functions is presented which includes 2nd generation wavelet decomposition and reconstruction tools for images as well as functions for the computation of moment invariants. The wavelet schemes rely on the lifting scheme of Sweldens.

这是《小波分析理论与MATLABR2007实现》的源代码。主要是基于Matlab的小波工具箱实现小波基选择、小波包分解、Mallat变换以及小波变换在边缘提取、图像去噪、数据压缩等中的应用，特别包含了二代提升小波的相关内容，理论与实际相结合。大家想要了解的二进小波、正交镜像滤波器组[QMF]等概念这里都有体现。-This is 《MATLABR2007 wavelet analysis theory and implementation》 of the source code. Mainly

该程序实例首先对二维图像进行提升小波分解，然后构造传统小波分解结构[c,s]，接着使用函数ddencmp()获取信号压缩阈值，再采用函数wdencmp()实现图像压缩-First,the program decomposes the image use lifting wavelet , and then construct the traditional wavelet decomposition structure [c, s], then use the function ddencmp