figure17.m

来自「是一本教科书的各个章节的源程序代码,适合初学数字图像的人」· M 代码 · 共 19 行

clear
load wmandril;
subplot(121); image(X); colormap(map);
title('原始图像');
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(122); image(xx); colormap(map);
title('增强图像');
axis square