说明：  小波变换是新一代图像编码标准JPEG2000中采用的方法。此文档介绍小波的发展，并通过详细的例子讲述了小波变换的基本原理，简单易懂。
(Wavelet transform is a new generation JPEG2000 image coding standard method used. This document describes the development of wavelet and, through detailed examples about the basic principles of wavelet transform, easy-to-read.)