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Vector-scalar classification for transform image coding

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1 Author(s)
Jianping Pan ; CommQuest, Encinitas, CA, USA

This paper introduces vector-scalar classification (VSC) for discrete cosine transform (DCT) coding of images. Two main characteristics of VSC differentiate it from previously proposed classification methods. First, pattern classification is effectively performed in the energy domain of the DCT subvectors using vector quantization. Second, the subvectors, instead of the DCT vectors, are mapped into a prescribed number of classes according to a pattern-to-class link established by scalar quantization. Simulation results demonstrate that the DCT coding systems based on VSC are superior to the other proposed DCT coding systems and are competitive compared to the best subband and wavelet coding systems reported in the literature

Published in:

Image Processing, IEEE Transactions on  (Volume:8 ,  Issue: 9 )

Date of Publication:

Sep 1999

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