A contrast enhancement technique based on visual significance

Abstract

Histogram equalization technique is a well-known method of enhancing the contrast of digital images. However. a drawback of this classical technique is that it enhances the whole image indiscreetly. resulting in unnecessary details. We propose a method that identies visually significant regions and then enhances the image using the classical hi~togram equalization technique. Results illustrating the operation and superior performance of the proposed algorithm along 'with classical histogram equalization are presented.