image equalization and cumulative histogram

Fri Mar 25, 2011 4:08 pm

Following code does equalization on input image and draw the cumulative histogram before and after .

Code:: I = imread('cameraman.tif'); %% Show current image. imshow(I); %% draw the cumulative histogram of orginal image. figure; histogram = imhist(I);%image histogram. ch = cumsum(histogram);%cumulative histogram. bar(ch,'BarWidth',1)%draw bar. %% image equalization and cumulative histogram figure; J = histeq(I); imshow(J); figure; histogramEq = imhist(J);%image histogram. ch = cumsum(histogramEq);%cumulative histogram. bar(ch,'BarWidth',1)%draw bar.

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