Abstract

Enhancement techniques can be used to process an image so that the final result is more suitable than the original image for a specific application. Most of the image enhancement techniques are problem oriented. Image enhancement techniques fall into two broad categories: spatial domain techniques and frequency domain methodologies. The spatial domain refers to the image itself, and spatial domain approaches are based on the direct manipulation of pixels in the image. On the other hand, frequency domain techniques are based on modifying the Fourier transform of the image. Only spatial domain techniques are discussed in this chapter.

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