小波去噪.m

小波变换的matlab程序

load sinsin
subplot(1,3,1),image(X);
 init=2055615866,randn('seed',init);
 x=X+18*randn(size(X));
 subplot(1,3,2),image(x);
 [thr,sorh,keepapp]=ddencmp('den','wv',x);
 xd=wdencmp('gbl',x,'sym4',2,thr,sorh,keepapp);
 subplot(1,3,3),image(xd);