Quadtree-based multiregion multiquality image coding

被引：6
|
作者：
Tasdoken, S [1 ]
Cuhadar, A [1 ]
机构：
[1] Carleton Univ, Dept Syst & Comp Engn, Ottawa, ON K1S 5B6, Canada
来源：
IEEE SIGNAL PROCESSING LETTERS | 2004年 / 11卷 / 02期
关键词：
embedded zerotree block coding (EZBC); JPEG-2000; quadtree-based wavelet coding; region-based coding; set partitioning in hierarchical trees (SPIHT);
D O I：
10.1109/LSP.2003.821661
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：
Region-based video coding schemes employed in MPEG-4 are also promising for still image coding applications where images contain a number of objects that can be encoded at different bit rates, such as compression of medical images for archiving and transmission. Motivated by this fact, in this letter we investigate multiregion multiquality (MRMQ) coding with quadtree-based wavelet coders. We present a novel scheme which addresses the region size sensitivity problem in region-based coding. The proposed method outperforms the region-of-interest (ROI) coding unit of JPEG-2000; it is possible to save 0.3 bits per pixel to attain the same ROI/background fidelity without sacrificing the additional features provided by JPEG-2000, such as resolution scalability and error resilience.
引用
收藏
页码：101 / 103
页数：3
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