how to compare the value of a pixel with all other pixel?

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sheno39 2013-10-28

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https://ww2.mathworks.cn/matlabcentral/answers/104106-how-to-compare-the-value-of-a-pixel-with-all-other-pixel

回答： sheno39 2013-10-28

采纳的回答： Andrei Bobrov

i have to compare each pixel with all other pixels and find equal values.

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Answer 1

Andrei Bobrov 2013-10-28

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https://ww2.mathworks.cn/matlabcentral/answers/104106-how-to-compare-the-value-of-a-pixel-with-all-other-pixel#answer_113443

在 MATLAB Online 中打开

M = randi(10,40,30);
uM = unique(M);
out = [uM, histc(M(:),uM)];

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sheno39 2013-10-28

编辑：sheno39 2013-10-28

在 MATLAB Online 中打开

if true
  I=im2double(imread('texture1.jpg'));
imshow(I);
%S=uint8(rgb2gray(I));
S=rgb2gray(I);
%S=I;
imshow(S),figure;
M=[1 1 1;1 1 1;1 1 1]./9;
A=(exp(-((S-conv2(S,M,'same')).^2)./18));
I=(1/2*pi*9).*A;
D = padarray(I,[1 1],0,'both');
s = size(I);
N = padarray(reshape(1:numel(I),s),[1 1],0,'both');
pt = [1 1 1;1 0 1;1 1 1] > 0;
s1 = s+2;
out = zeros(s);
for i=2:s1(1)-1
  for j=2:s1(2)-1
      D1 = D(i-1:i+1,j-1:j+1);
  K = N(i-1:i+1,j-1:j+1);
  K = K(pt);
      [~,i0] = max(D1(pt));
  out(i-1,j-1) = K(i0);
  end
end
end

sir here i attached my coding. The 'out' variable stores the location of maximum pixel. The 'I' variable stores the intensity value.

i need to do the following: take the first location value(for eg: 320) in the 'out' variable and find the corresponding intensity value in the 'I' matrix. then compare that intensity value with all other values in the 'I' matrix. If any equal value available, have to replace the corresponding similar values locations by the first value. (ie. 320)

Can u help me sir?

Image Analyst 2013-10-28

You forgot to attach your texture1.jpg image. Don't make it hard for us to help you. Make it easy for us to help you by attaching your image.

sheno39 2013-10-28

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Answer 2

Jos (10584) 2013-10-28

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https://ww2.mathworks.cn/matlabcentral/answers/104106-how-to-compare-the-value-of-a-pixel-with-all-other-pixel#answer_113442

在 MATLAB Online 中打开

You question is a little unclear. But, see

help unique
M = ceil(10*rand(40,30)) % pixel image
uM = unique(M) ;
% and use it like this
tf = M==uM(k)
[r,c] = find(tf)

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sheno39 2013-10-28

sir i have to compare each pixel with all other pixels and if any pixels having equal values i have to increament the count.

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Answer 3

sheno39 2013-10-28

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https://ww2.mathworks.cn/matlabcentral/answers/104106-how-to-compare-the-value-of-a-pixel-with-all-other-pixel#answer_113506

texture1.jpg

i have attached my image here

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how to compare the value of a pixel with all other pixel?

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how to compare the value of a pixel with all other pixel?

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