Contrast Enhancement Using Histogram Equalization

Abstract

   Image contrast development is the process on the image to make it more effective, to make clearness in images and to have high pictorial effects. These process are used to enhance the clarity and visual effects, or to create more conducive computational process for original image. The contrast improvement, deviates the strength of input image by histogram equalization methods. Several image contrast enhancement techniques had been proposed such as HE, BBHE, MHE, RSWHE, DSIHE, GHE,LGCS,RMSHE, and LHE. These techniques yield some side effects in the handled image. In this review paper, the various methods for enhancement of image based on histogram equalization, brightness protection and computational period are reviewed. It also suggest a comparative technique that can enhance the image and it preserves the original data and brightness with improved performance and computational times.