小波包消噪声.m

来自「小波变换的matlab程序」· M 代码 · 共 20 行

load flujet;
subplot(2,2,1);
image(X);
colormap(map);
axis square;
init=2055615899;
randn('seed',init);
X1=X+20*randn(size(X));
subplot(2,2,2);
image(X1);
colormap(map);
T=wpdec2(X1,1,'sym2');
thr=8.342;
NT=wpthcoef(T,0,'s',thr);
X2=wprcoef(NT,1);
subplot(2,2,3);
image(X2);
colormap(map);