A unified lossless coding scheme for gray-level, bi-level and compound images

被引:0
|
作者
Kato, S [1 ]
Guo, ML
机构
[1] Utsunomiya Univ, Fac Engn, Utsunomiya, Tochigi 3218585, Japan
[2] Utsunomiya Univ, Grad Sch Engn, Utsunomiya, Tochigi 3218585, Japan
关键词
source coding; image coding; data compression; lossless coding; unified coding;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A unified source coding method is highly desired for many systems that deal with images diversifying from 1 bit/pel bilevel documents to SHD (Super High Definition) images of 12 bit/pel for each color component, and progressive coding that allows images to be reconstructed with increasing pixel accuracy or spatial resolution is essential for many applications including World Wide Web, medical image archive. digital library, pre-press and quick look applications. In this paper, we propose a unified continuous-tone and bi-level image coding method with pyramidal and progressive transmission feature. Hierarchical structure is constructed by interlacing subsampling, and each hierarchy is encoded by DPCM combined with reduced Markov model. Simulation results show that the proposed method is a little inferior than JBIG for hi-level image coding but can achieve better lossless compression ratio for gray-level image coding than CREW! in which wavelet transform is exploited to construct hierarchical structure.
引用
收藏
页码:2536 / 2543
页数:8
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