pixel by pixel squaring of image?

If I have an image of size M by N then how can I do the square of each pixel individually?

Answer 1

[Sabarinathan Vadivelu]

outImage = zeros(size(inputImage));

for i = 1 : size(inputImage, 1)
    for j = 1 : size(inputImage, 2)
        outImage(i, j) = inputImage(i,j)^2;
    end
end

[RAVI KUMAR]

I have tried it but couldn't get the result. As if do the the square of each pixel first and then the square root of each pixel then I should get the initial input image but I didn't

[RAVI KUMAR]

It worked with using ones instead of zeros in the first line.. putImage = ones(size(inputImage));

Anyway thanks for the help.

[maaham banu]

hi, why doesnt this algorithm work for a gray image? I am getting only 255

[Image Analyst]

Because if the value goes above 255, it clips to 255. You'll have to use uint16 or double. And don't use a for loop like this answer did. Use dot caret instead:

outImage = double(inputImage) .^ 2; % or uint16()