Evaluation of the Entropy Based Contrast Enhancement Methods for MRI Images

Abstract

This paper presents the significant methods used for grayscale images quality enhancement. The contrast and entropy are among the principal attributes of the brain MRI images. We investigate which method works better for image enhancement without any loss of the important information. The proposed study is validated on 80 images (40 proton density and 40 T2w). They encompass images from healthy patients, and patients with Alzheimer, Pick and cerebral calcinosis degenerative disease. The images show a wide range of the gray level values and hence various contrast levels. For a comprehensive study, a comparison between processed vs. unprocessed image has been performed.