How do I make a table of a value with its coordinate ung nested for loop?

In this code, the Inew is the sum of a window of an image and i intended to store its value to 3 column of matrix with its coordinate in the image but the value of i and j stored in the matrix is wrong, the j is a constant value and the i is also wrong.

for i=1:1: size(I,1) - 31
     for j=1:size(I,2) - 31
          Inew(i,j) = sum(sum(I(i:i+31,j:j+31)));
          sort_mat(i,1:3) = [i,j,Inew(i,j)];    
     end
end

Help please Thank you!

[Azzi Abdelmalek]

What is the size of I ?

[marcuru rorira]

the size is 512x768

[Azzi Abdelmalek]

marcuru commented

Thank you for the help i really appreciate it

Answer 1

[Image Analyst]

I don't know why you need the row and column. Just put the sum in a new image and you have everything you need.

sumImage = conv2(yourImage, ones(31), 'same');

That format you were suggesting is probably not good for anything. I just don't see why you need it. If you do, you can use meshgrid() and then tack on the sumImage as the third column as I calculated above, but again, I don't think you will need that.

Answer 2

[Azzi Abdelmalek]

Your code is wrong. You can notice that j is constant because sort_mat(i,1:3) is erasing itself until j=size(I,2)-31. Your second column is equal to this value. It should be

ii=0;
for i=1:1: size(I,1) - 31
   for j=1:size(I,2) - 31
        ii=ii+1;
        Inew(i,j) = sum(sum(I(i:i+31,j:j+31)));
        sort_mat(ii,1:3) = [i,j,Inew(i,j)];    
   end
end

It's also recommended to pre-allocate sort_mat before the for loop