dcdcg.m

数字图像处理

kk=imread('ziji1.jpg');
X=rgb2gray(kk);
X=double(X);

[c,s]=wavedec2(X,2,'db1');
sc=size(c)
val_s=s
[nc,ns]=upwlev2(c,s,'db1');
snc=size(nc)
val_ns=ns
cal=appcoef2(nc,ns,'db1',1);
 figure(5);
  subplot(121);
 imshow(X,[]);
title('原始图像');
subplot(122);
imshow(cal,[]);
title('尺度1的小波分解低频系数');