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Proceedings Paper

Fast embedded image coding technique using wavelet difference reduction
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Paper Abstract

We propose two modi ed versions of the original wavelet di erence reduction (WDR) algorithm proposed by Tian and Wells. The rst algorithm encodes an image without entropy coding and achieves comparable PSNR performance with the original WDR at low bit rate while exceeding the PSNR performance of original WDR algorithm at medium to high bitrates. The second algorithm achieves slightly higher PSNR performance than that of original WDR with similar computational complexity. The modification to the original WDR is based on the observation that encoding the symbol streams generated in the sorting pass (significance map) and re nement pass (magnitudes) separately can be beneficial. We can either encode the symbol streams under different contexts using entropy coder, or output the raw symbol streams without entropy coding stage. It is shown in the experiments that up to 1/3 of both the encoding time and the decoding time can be saved without sacrificing any PSNR performance when compared to the original WDR.

Paper Details

Date Published: 30 August 2002
PDF: 9 pages
Proc. SPIE 4925, Electronic Imaging and Multimedia Technology III, (30 August 2002); doi: 10.1117/12.481588
Show Author Affiliations
Yufei Yuan, Univ. of Alberta (Canada)
Mrinal K. Mandal, Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 4925:
Electronic Imaging and Multimedia Technology III
LiWei Zhou; Chung-Sheng Li; Yoshiji Suzuki, Editor(s)

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