Enhancement Techniques for Gray scale Images in Spatial Domain

The main objective of image enhancement is to process an image so that result is more suitable than the original image for specific application. Advancement in the technology brings the development in the Digital image processing techniques in both domains: spatial domain and frequency domain. Image enhancement plays a vital role in every field where images have to be understood and analyzed. Many images like medical images,satellite images, microscopy images, aerial images and even real life photographs suffer from poor contrast and noise. It is necessary to enhance the contrast and remove the noise to increase image visual quality. Image modality, task at hand, and viewing conditions decides the choice of image enhancement methods. This paper focuses on different image enhancement techniques for grayscale images in spatial domain and gives better approach for future research.