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Help how to convert -ve image to +ve image using MATLAB

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susannit

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sir,
I am doing project in NDT. I am inneed of separting the image send me some valuable suggestions I will be very thankful to you.
with thanks
sudharsan.T
 

medra

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could u explain more what is -ve ,positive image so that i could help u???
 

Robinenemy

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You can take the absolute value

using I = abs(I);
where I is the image matrix

Regards

Robin
 

lena

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F(x,y) input image
g(x,y) negative of f(x,y)
g(x,y) = 255- f(x,y);
 

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