Image and Videl Comoression P9

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Image and Videl Comoression P9

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In this chapter, we introduce three nonstandard image coding techniques: vector quantization (VQ) (Nasrabadi and King, 1988), fractal coding (Barnsley and Hurd, 1993; Fisher, 1994; Jacquin, 1993), and model-based coding (Li et al., 1994). 9.1 INTRODUCTION The VQ, fractal coding, and model-based coding techniques have not yet been adopted as an image coding standard. However, due to their unique features these techniques may find some special applications. Vector quantization is an effective technique for performing data compression. Theoretically, vector quantization is always better than scalar quantization because it fully exploits the correlation between components within the vector. The optimal coding performance will...

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