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Get pixel where the intensity is 255

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Hi I have an immage 2048x2448 grayscale, I want to find all the pixel where the intensity is "255".
After i have find them i want to print this point on the immage

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Ameer Hamza
Ameer Hamza on 30 Oct 2020
img; % 2048x2448 matrix
[r, c] = find(img==255); % r and c contain all row and columns
If you want to mark these points on the image
plot(c, r, '+')
It will draw '+' marker at those locations.

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Ameer Hamza
Ameer Hamza on 30 Oct 2020
plot(c, r, '+')
will plot the points on the image. Something like this
img; % 2048x2448 matrix
[r, c] = find(img==255); % r and c contain all row and columns
imshow(img);
hold on
plot(c, r, '+')

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