Histogram Equalization Using MATLAB

Histogram Equalization Using MATLAB

Author Name : Md Riyad Hossain

ABSTRACT

Image enhancement is the process of adjusting digital images so that the results are more suitable for display or further image analysis. Image enhancement can be done by Histogram equalization. Histogram equalization is a technique for adjusting image intensities to enhance contrast. This method usually increases the global contrast of many images, especially when the usable data of the image is represented by close contrast values. Through this adjustment, the intensities can be better distributed on the histogram. This allows for areas of lower local contrast to gain a higher contrast. Histogram equalization accomplishes this by effectively spreading out the most frequent intensity values. This finds applications in Science and Engineering. Histogram Equalization is a contrast enhancement technique in the image processing which uses the histogram of image. However histogram equalization is not the best method for contrast enhancement because the mean brightness of the output image is significantly different from the input image.

Keywords: Histogram Equalization, Image Analysis, Contrast, Intensity, Enhancement, Brightness, Image processing.