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Create vectors that allow to subdivide the pixels of an image

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Hello, I was wondering if someone could tell me how I can subdivide an image, for example img, so that I can store in a vector the positions of the rows and in another vector the columns (which logically would not be integers) to divide each pixel in 5 parts.
img = rand(10,20);
figure, imshow(img,'InitialMagnification','fit');
That is, what I would like is to be able to build a grid that follows the basis of what the poly2mask function does but with all the pixels:
Poly2Mask Grid
Thank yo so much

Accepted Answer

Matt J
Matt J on 9 Jul 2021
Edited: Matt J on 9 Jul 2021
[m,n]=size(img);
y=linspace(0,m,5*m+1).'+0.1; y(end)=[];
x=linspace(0,n,5*n+1).'+0.1; x(end)=[];
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