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From: Dalle Ali on 16 Jul 2010 05:22
hey guys,

does anybody know how to convert the histogram, that being manipulated, to an image? well i try to make my point clearer with my code:

%read an image whose histogram's will be manipulated
f = imread('.....\abc.tif');
f12 = uint16(f/16); %convert the image to 12-bit
[pixelcount12 gray12] = imhist(f12, round(double(intmax(('uint16')))/16));
figure, imhist(f); %plot the original histogram
figure, plot(gray12, pixelcount12), xlim([0,4096]); %plot the 12-bit histogram

%begin to manipulate the grayvalues from histogram
i=1;
while i<=123;
gray201(i)=gray12(i);
i=i+1;
gray201';
end;
i=124;
while i<=189;
gray202(i)=((gray12(i)-1936.814069)/2.308799)*148.163473+163.332234;
i=i+1;
gray202';
end;
i=190;
while i<=256;
gray203(i)=((gray12(i)-2954.085311)/0.17003294)*148.163473+163.332234;
i=i+1;
gray203';
end;

%plot every part from the grayvalues that being manipulated
figure, plot(gray201, pixelcount201, 'r');
figure, plot(gray202, pixelcount202, 'b');
figure, plot(gray203, pixelcount203, 'g');

and then... i don't know how the image looks like with the new histogram...
so in short, i divide the grayvalues from the original histogram to 3 parts, i manipulated them with some kind of equation, and i really want to know how the new image from the new histogram looks like..
any help will be much appreciated ;)

cheers and hood day!
Dalle
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