ezw.m

EZW的matlab程序 基于小波变换对图像进行压缩编码的研究

function y=ezw(Im,imDim,codeDim,DecodeDim)
% function [scancode,quantiflag]=ezwCoder(DecIm,dim)
global row col
[row,col]=size(Im);
% ----- Wavedec -----%
DecIm=mywavedec2(Im,imDim);
% DecIm=Im;
% ----- Select threshold -----%
MaxDecIm=max(max(abs(DecIm)));
T=zeros(1,codeDim);
T(1)=2^flor(log2(MaxDecIm));
for i=2:codeDim
    T(i)=T(i-1)/2;
end

% ----- EZW coding -----%
[CodeList,LenSubCL,QuantiFlagList,LenSubQFL]=ezwcode(DecIm,T,codeDim);
% ----- EZW decoding -----%
DecodeMat=ezwdecode(DecIm,T(1),DecodeDim,CodeList,LenSubCL,QuantiFlagList,LenSubQFL);

% ----- Waverec -----%
DecIm(1:row/8,1:col/8)
DecodeMat(1:row/8,1:col/8)
RecIm=mywaverec2(DecodeMat,imDim);