Question

matlab里小波变换，使用dwt2(x,'haar')后，如何对4部分图像进行显示

Answer 1

[ca,ch,cl,cd]=dwt2(x,'haar'); %x=imread('lena.bmp');
II=[ca ch;cl cd];
imshow(II,gray(256));

Answer 2

img = imread('lena01.bmp');
img =rgb2gray(img);
[ca1 ch1,cv1,cd1] = dwt2(img,'haar');
subplot(2,2,1);
imshow(uint8(ca1));
subplot(2,2,2);
imshow(uint8(ch1));
subplot(2,2,3);
imshow(uint8(cv1));
subplot(2,2,4);
imshow(uint8(cd1));
figure(2)
imagesc([ca1,ch1;cv1,cd1]);
axis square;

Answer 3

方便看一下你的程序代码么？只有知道了你的代码，才好说明怎么做具体操作，也可以直接发到我的邮箱2509334155@qq.com