如何将图像分解为8 x 8像素块？ [英] How can I decompose an image into 8 x 8 pixel blocks?

问题描述

 I=imread('X.jpg'); 
 [a b]=size(I);
 figure;imshow(I);
j=rgb2ycbcr(I);
figure;
imshow(j);
ca=mat2cell(j,8*ones(1,size(j,1)/8),8*ones(1,size(j,2)/8),3);
p=1; 

 for c=1:size(ca,1)
  for r=1:size(ca,2)
    subplot(8,8,p);
    imshow(ca{c,r});
    p=p+1;
    end
   end

我收到以下错误：
Index超过子图的数量。
有什么想法吗？

i get the following error: Index exceeds number of subplots. Any thoughts?

推荐答案

之所以这样，是因为你有更多的图像块要显示，而不是你有子图空格绘图。改为将换成循环代码改为：

The reason why is because you have more image blocks to show than you have subplot spaces when plotting. Change your for loop code to this instead:

p = 1;
figure;
for c=1:size(ca,1)
    for r=1:size(ca,2)
       subplot(size(ca,1),size(ca,2),p); %// Change
       imshow(ca{c,r});
       p=p+1;
    end
end

这样，您将拥有尽可能多的子图空间绘制，因为你有要显示的像素块。

This way, you will have as many subplot spaces to plot as you have pixel blocks to show.

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