grayscale image clustering, show ouput image from matrix

Hello, I want a grayscale image clustering according intersity colors from 0-255.

my code:

I = imread('obraz1.png');
I=rgb2gray(I);
imshow(I);
title('Grayscale image','FontSize',16,'Color','k'); 

I=double(I);
maxi=max(I(:));
I=I./maxi;

[m n]=size(I);

P = [];
for i=1:m    
    for j=1:n        
        if I(i,j)<1 %%All except white
          P=[P; i j ];

    end
        end
    end
    size(P);
    MON=P; 

[IDX]= kmeans(MON,3,'emptyaction','singleton')

how do i display image after clustering ?

[Manjurekha M.Phil]

i need grayscale image clustering, show ouput image from matrix source code in matlab

[Image Analyst]

OK. Good luck.

https://www.mathworks.com/help/stats/cluster-analysis.html

http://www.powershow.com/view/83184-NWNiZ/Advanced_analysis_Classification_clustering_and_other_multivariate_methods_flash_ppt_presentation

Answer 1

[Image Analyst]

I'd guess create a classified image by going down IDX and setting the value of the classified image to either 1, 2, or 3 for each pixel, depending on what class it is.

[Tomas]

Could you advise me some code ? already tried it all week, but without success Very thanks.

[Image Analyst]

I don't have the Statistics Toolbox so I can't be sure but don't you think it would go like this

classifiedImage = zeros(size(I), 'int32');
for p = 1 : length(IDX)
  row = P(p, 1);
  column = P(p, 2);
  % Set this pixel of the classified image
  % to the class it identified for that pixel.
  classifiedImage(row, column) = IDX(p);
end

I've never used kmeans since I don't have the toolbox but I just read the documentation for a minute and that's what I came up with. It seemed really really obvious to me, though it's probably not right since you worked on it for a whole week, so what I came up with in less than a minute can't be right. But for what it's worth, that's my best guess.

[Tomas]

Thank you it works. it is logically correct final image compared to the input image ?

Thank you for your feedback.

input image

output image