منابع مشابه
Hybrid vector quantization
Natural images can be segmented into regions with widely varying perceptual importance. There are three types of regions in a typical image. The region in which the contrast between objects and background is high is categorized as the edge. Due to the high contrast, human eyes will naturally pay much attention to the edges. Thus, edge regions are very important for human perception. The second ...
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ii ACKNOWLEDGEMENTS If I have seen this far, it is because I have stood on the shoulders of giants.-Sir Isaac Newton I am highly indebted to my advisor, Dr. Sunanda Mitra for providing consistent support and guidance both technically and financially during my Master's program. Her timely suggestions and valuable advice enabled the successful completion of this work. I would also like to thank D...
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In this paper, image compression using hybrid vector quantization scheme such as Multistage Vector Quantization (MSVQ) and Pyramid Vector Quantization (PVQ) are introduced. A combined MSVQ and PVQ are utilized to take advantages provided by both of them. In the wavelet decomposition of the image, most of the information often resides in the lowest frequency subband. MSVQ is applied to significa...
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This thesis studies the multiple description vector quantization with lattice codebooks (MDLVQ). The design of index assignment is crucial to the performance of MDLVQ. However, to our best knowledge, none of previous index assignment algorithms for MDLVQ is optimal. In this thesis, we propose a simple linear-time index assignment algorithm for MDLVQ with any K ≥ 2 balanced descriptions. We prov...
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This paper is the extension of two-stage vector quantization–(spherical) lattice vector quantization (VQ–(S)LVQ) recently introduced by Pan and Fischer [1]. First, according to high resolution quantization theory, generalized vector quantization–lattice vector quantization (G-VQ–LVQ) is formulated in order to release the constraint of the spherical boundary for the second-stage lattice vector q...
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ژورنال
عنوان ژورنال: Optical Engineering
سال: 1993
ISSN: 0091-3286
DOI: 10.1117/12.141682