Abstract

The field of Digital Image Processing refers to processing digital images by means of digital computer. One of the main application areas in Digital Image processing methods is to improve the pictorial information for human interpretation. Most of the digital images contain noise. This can be removed by many enhancement techniques. Filtering is one of the enhancement techniques which is used to remove unwanted information (noise) from the image. 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 also used for image sharpening and smoothening. This paper focuses on different image enhancement techniques for grayscale images in spatial domain and gives better approach for future research.

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