autoscale.m

to flip image in matlab

function Autoscale
global IMG
image=double(IMG);
s=size(image);
result=zeros(s(1),s(2),s(3));
fmax=image(1,1,1);
fmin=image(1,1,1);
for i=1:s(1)
    for j=1:s(2)
        for k=1:s(3)
            if image(i,j,k) > fmax
                fmax=image(i,j,k);
            end
            if image(i,j,k) < fmin
                fmin=image(i,j,k);
            end
        end
    end
end
for i=1:s(1)
    for j=1:s(2)
        for k=1:s(3)
            g=round((255/(fmax-fmin))*(image(i,j,k)-fmin));
            result(i,j,k)=g;
        end
    end
end
res=uint8(result);
IMG=res;
imshow(IMG)