Histogram equalisation using Matlab

I have started learning the Image Processing toolbox of Matlab. My second tutorial was Histogram equalisation.

I downloaded a rice grain image shown  below: Rice grain image before equalisationNow, the following code was used:

I = imread(‘rice.png’)  // The image is in the working directory.

figure,imhist(I)

The histogram of the image is shown in the figure below:

Histogram of ImageThe image was equalised using the following commands:

I2 = histeq(I);

figure, imhist(I2)

The equalised histogram is shown below:

Histogram EqualisationAn image with an improved contrast was obtained as shown in the image below:

aftereqBingo! The contrast of the image has improved!!!

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3 Responses to Histogram equalisation using Matlab

  1. Srihari says:

    Looks very interesting. Keep posting your discoveries!

  2. Hi there to every one, the contents present at this web page are actually
    awesome for people experience, well, keep up the nice
    work fellows.

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