Special Section on Satellite Data Compression

Using a weighted zeroblock coder for satellite image compression

[+] Author Affiliations
Jiaji Wu

Xidian University, School of Electronic Engineering, No. 2, Taibai Road, Xi'an, Shaanxi 710071 China

Yan Xing

Wireless Research Institute, Zhongxing Telecommunication Equipment, Xi'an, Shaanxi 710065 China

Jechang Jeong

Hanyang University, Department of Electronic and Computer Engineering, 17 Haengdang-dong, Seongdong-gu, Seoul, Korea, Seoul, Seoul 133-791 Republic of Korea

Guangming Shi, Licheng Jiao

Xidian University, School of Electronic Engineering, No. 2, Taibai Road, Xi'an, Shaanxi 710071 China

J. Appl. Remote Sens. 4(1), 041787 (July 14, 2010). doi:10.1117/1.3474986
History: Received November 30, 2009; Revised June 1, 2010; Accepted June 10, 2010; July 14, 2010; Online July 14, 2010
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Abstract

In this paper, we propose an embedded satellite image compression method using Weighted ZeroBlock Coding (WZBC) and optimal sorting. In order to reduce average codeword length, Set Partition Embedded block (SPECK) and Embedded ZeroBlock Coder (EZBC) both encode significant block-sets with fixed-length bits, while WZBC assigns different-length bits to encode block-sets which contain different numbers of significant subblocks. In view of the context correlation among coefficients/blocks, WZBC employs a weight context to optimize the scanning order of the significance testing and the ratedistortion performance. Experimental results show that the proposed WZBC in binary coding mode provides excellent coding performance compared with those of SPECK and Set Partitioning In Hierarchical Trees (SPIHT) which use arithmetic coding, and can even closely approach that of JPEG2000. When arithmetic coding is extensively used, the proposed method has clear advantages.

© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Jiaji Wu ; Yan Xing ; Jechang Jeong ; Guangming Shi and Licheng Jiao
"Using a weighted zeroblock coder for satellite image compression", J. Appl. Remote Sens. 4(1), 041787 (July 14, 2010). ; http://dx.doi.org/10.1117/1.3474986


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