How can we apply the standard deviation?

Question

wissa amer 2014-3-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/121959-how-can-we-apply-the-standard-deviation

回答： Dishant Arora 2014-3-18

In the following code image was divided into 8 * 8 blocks

    Image=rgb2gray(imread('1.jpg')); [m n]=size(Image);
Nbrx = floor(m./8); Nbry = floor(n./8); Nd=1;
for i=1:Nbrx
    for j=1:Nbry
   Mat=Image((i-1)*8+1:i*8,(j-1)*8+1:j*8);
        subplot(Nbrx,Nbry,Nd); imshow(Mat)
        Nd=Nd+1;
    end
end

How can we apply the standard deviation on each block

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Answer 1

Dishant Arora 2014-3-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/121959-how-can-we-apply-the-standard-deviation#answer_128874

在 MATLAB Online 中打开

doc blockproc

It operates given function on an image block by block, so will get rid of the code you wrote above to partition the image. And std gives standard deviation.