以[C,L] = wavedec(X,5,'db2')为例： C为分解系数，L是length的意思，记录的是由高到低各级的长度。 X代表进行分解的变量；5代表分解层数；使用'db2'小波。 对图象进行小波分解，可以在MATLAB中实现。在COMMAND WINDOWS窗口中直接输入wavedemo进入说明,wavemenu进使用程序，也可以直接编程。程序在wavedemo里面自带。
利用自相似过程在小波分解下的特性，提出了基于小波变换的自相似信号检测算法。
A detection approach based on wavelet transform is proposed for these self-similar signals, which is obtained from the properties of the self-similar process after wavelet transform.
通过对字符图像水平和垂直两个方向的投影曲线分别进行小波分解，得到投影曲线的近似表示。
The projective curves along the horizontal and vertical directions were obtained from the character images, and were approximated by using wavelet decomposition.
本文详细介绍了通过多分辨分析和小波分解实现正交小波变换的基本原理，并给出了实现算法。
In this paper, we particularly explain the basic principle of orthonormal wavelet Transform by multiresolution and wavelet decompose and give a realization algorithm.
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