ABSTRACT
IN this chapter, we give an overview of a number of image-processingtechniques. The term image processing refers to methods that input and output an image. Image-processing methods belong to the earliest developments in computer graphics. In the last decade, a large number of such methods have been researched and put into practice. Such methods range from simple filtering operations that remove noise from digital photographs up to complex techniques that extract and manipulate twodimensional shapes from video sequences. Given the sheer size of the field, we shall limit ourselves here to presenting only mainstream methods that are encountered in a large class of applications, and in particular those image-processing methods that are frequently encountered in visualization applications.
