本文件为Matlab环境下，不用小波工具箱编的小波变换源代码。-this document for Matlab environment, not wavelet Toolbox series of the wavelet transform source code.

WAVEFAST Perform multi-level 2-dimensional fast wavelet transform. [C, L] = WAVE FAST (X , N, LP, HP) performs a 20 N-level FWT of image (or matrix) X with respect to decomposition filters LP and HP. [C, L] = WAVEFAST(X, N, WNAME) performs the sa