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Machine Vision, 3rd Edition by E. R. Davies

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CHAPTER 3 Basic Image Filtering Operations

3.1 Introduction

In this chapter the discussion is extended to noise suppression and enhancement in gray-scale images. Although these types of operations can for the most part be avoided in industrial applications of vision, it is useful to examine them in some depth because of their wide use in a variety of other image processing applications and because they set the scene for much of what follows. In addition, some fundamental issues come to light which are of vital importance.

It has already been seen that noise can arise in real images; hence it is necessary to have sound techniques for suppressing it. Commonly, in electrical engineering applications, noise is removed by means of low-pass or other ...

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