Image contrast enhancement based on 2D Teager-Kaiser operator

Abstract

This paper describes a new method based on the 2D Teager- Kaiser Energy Operator (2DTKEO) for image contrast enhancement. The 2DTKEO reflects better the local activity than the amplitude of a classical edges detection operator. This quadratic filter is used to enhance high frequency information which is then combined with image gray values to estimate the edge strength value used in the enhancement process. This value is the average of the gray values by the energy activity at each pixel. Different examples of images are provided to demonstrate the Performance of the proposed method is demonstrated on synthetic and real images and the results compared to histogram equalization and to an edge- based contrast method.