cwq4.m

图象的消噪,图象的压缩,图象的融合,图象的增强

%图象增强
load woman;
subplot(121);
image(X);
colormap(map);
title('原始图象');
axis square; %画出原图象
[c,s]=wavedec2(X,2,'sym4'); %进行二层小波分解
sizec=size(c); %处理分解系数，突出轮廓，弱化细节
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'); %分解系数重构
subplot(122);
image(xx);
title('增强图象')
axis square;%画出增强图像