gamma

RGB=imread('asd.jpg');

%% RGB to gray

I=rgb2gray(RGB);

% In double format

I=im2double(I);

%%

% computing size m,n

[m n] = size(I);

%%

% Computing s = c * (r ^ gamma) where r and gamma are positive constants

c = 2;

g =[0.5 0.7 0.9 1 2 3 4 5 6];% Gamma Correction Array

for r=1:length(g)

for p = 1 : m

    for q = 1 : n

        I3(p, q) = c * I(p, q).^ g(r); 

    end

end

figure, imshow(I3);title('Power-law transformation');xlabel('Gamma='),xlabel(g(r));

end