Alternative TitleSequential Imagery Lossless Compression Algorithm for Space Astronomical Observation
孙建伟; 薛长斌; 郑铁; 张忠伟
Source Publication空间科学学报
Volume39Issue:6Pages:847-852; AR:0254-6124(2019)39:6<847:MXKJTW>2.0.TX;2-V
Keyword序列图像 帧内压缩 帧间压缩 JPEG-LS Sequential imagery JPEG-LS Intra-frame compression Inter-frame compression
Other AbstractIn astronomical observation missions,a large number of sequential imagery is obtained.They are produced by fixpoint photography in a period of time,and all have some common features with high resolution and high time-space redundancy.The large volume of such imagery challenges on-board transmission and storage mission.Hence,an algorithm based on inter-frame prediction is proposed in order to reduce the images' bitrates.It includes the intra-frame compression algorithm and an improved inter-frame compression algorithm.The JPEG-LS is adopted to encoding the first image as the intra-frame compression algorithm.Then the other images are compressed by the inter-frame compression algorithm.First,the next image is predicted by its previous image,and then the prediction residuals are transmitted to JPEG-LS predictor for refining.Finally,the refined residuals are encoded by arithmetic encoder.Arithmetic coding does not require encoding each pixel like Huffman coding,and it is closer to the entropy of the image.The experiment result proves that the proposed algorithm promotes the compression performance,and it has lower complexity and less compression time comparing with the traditional JPEG-LS.The proposed algorithm is suitable for real-time onboard compression of astronomical observation sequential imagery.
Indexed ByCSCD
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Document Type期刊论文
Affiliation1.孙建伟, 中国科学院国家空间科学中心
2.中国科学院大学, 北京
3.北京 100190
4.100449, 中国.
5.郑铁, 中国科学院国家空间科学中心
6.中国科学院大学, 北京
7.北京 100190
8.100449, 中国.
9.薛长斌, 中国科学院国家空间科学中心, 北京 100190, 中国.
10.张忠伟, 中国科学院国家空间科学中心, 北京 100190, 中国.
11.Sun Jianwei, National Science Space Center,Chinese Academy of Sciences
12.University of Chinese Academy of Sciences, Beijing
13.Beijing 100190
15.Zheng Tie, National Science Space Center,Chinese Academy of Sciences
16.University of Chinese Academy of Sciences, Beijing
17.Beijing 100190
19.Xue Changbin, National Science Space Center,Chinese Academy of Sciences, Beijing 100190, China.
20.Zhang Zhongwei, National Science Space Center,Chinese Academy of Sciences, Beijing 100190, China.
Recommended Citation
GB/T 7714
孙建伟,薛长斌,郑铁,等. 面向空间天文观测的序列图像无损压缩算法[J]. 空间科学学报,2019,39(6):847-852; AR:0254-6124(2019)39:6<847:MXKJTW>2.0.TX;2-V.
APA 孙建伟,薛长斌,郑铁,&张忠伟.(2019).面向空间天文观测的序列图像无损压缩算法.空间科学学报,39(6),847-852; AR:0254-6124(2019)39:6<847:MXKJTW>2.0.TX;2-V.
MLA 孙建伟,et al."面向空间天文观测的序列图像无损压缩算法".空间科学学报 39.6(2019):847-852; AR:0254-6124(2019)39:6<847:MXKJTW>2.0.TX;2-V.
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