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What is Digital Image Processing : Concepts, Algorithms, and Scientific Applications about?

This chapter centers around the question of how to represent the infor­ mation contained in images. Together with the next two chapters it lays the mathematical foundations for low-Ievel image processing. Two key points are emphasized in this chapter. First, the information contained in images can be represented in en­ tirely different ways. The most important are the spatial representation (Section 2.2) and wave number representation (Section 2.3). These repre­ sentations just look at spatial data from different points of view. Since the various representations are complete and equivalent, they can be converted into each other. The conversion between the spatial and wave number representation is the well-known Fourier transform. This trans­ form is an example of a more general dass of operations, the unitary transforms (Section 2.4). Second, we discuss how these representations can be handled with digital computers. How are images represented by arrays of digital num­ bers in an adequate way? How are these data handled efficiently? Can fast algorithms be devised to convert one representation into another? A key example is the fast Fourier transform, discussed in Section 2.5. 2.2 S

Author

Bernd Jähne

Publisher

Springer Spektrum. in Springer-Verlag GmbH

Published

2013

Language

EN

ISBN

9783662047835

Subjects

Engineering, Medical, Computer Science