Detailed regions based medical image contrast enhancement

Contrast enhancement of digital images is used to process an input image and to get output image of better quality after processing. A widely used contrast enhancement technique is histogram equalization (HE) technique. Although the technique is simple and effective, it has some drawbacks. It does not preserve the brightness of the image and also has low value of peak signal to noise ratio (PSNR). In this paper, we propose a new technique to enhance the contrast of an image. The technique is detailed regions based and it can be applied on medical images. By using matlab the proposed technique was coded and tested. The proposed technique preserves the brightness of the image by giving low value of average mean brightness error (AMBE). At the same time high value of PSNR is obtained by the proposed technique which means the image is affected by low quality of noise.