ABSTRACT
Image enhancement techniques are used to improve the quality of an image for a specific application. If the method directly operates on the pixel value, then the method is termed as spatial domain method. If the processing is performed on a pixel, without considering the neighboring elements, then the processing is known as point processing. The processing that does consider the neighboring elements is known as mask processing. In this chapter, various image enhancement techniques in spatial domain are discussed. The process of removing small details in an image is known as smoothing and the process of making every detail different from its neighbors is known as sharpening. This chapter describes various techniques used for both smoothing and sharpening. Various arithmetic, logical and geometrical operations that can be performed on images are also described in the chapter.
