wave1.m

来自「图像压缩在MATLAB中的处理源代码。虽然较短」· M 代码 · 共 21 行

[X,map]=imread('lina.bmp');
subplot(221);
image(X);
colormap(map);
title('原始图象');
axis square
[c,s]=wavedec2(X,2,'sym4');
sizec=size(c);
for i=1:sizec(2)
    if(c(i)>350)
        c(i)=2*c(i);
    else
        c(i)=0.5*c(i);
    end
end
xx=waverec2(c,s,'sym4');
subplot(222);
image(xx);
title('增强图象');
axis square