多光谱遥感图像CCSDS动态码率控制近无损压缩

张宁; 冯书谊; 濮建福; 沈霁; 吴红松; 李贤; 张雷

doi:10.3788/OPE.20152306.1783

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多光谱遥感图像CCSDS动态码率控制近无损压缩

信息科学 | 更新时间：2020-08-13

- 多光谱遥感图像CCSDS动态码率控制近无损压缩
- Dynamic rate control for CCSDS nearly lossless compression of multispectral remote image
- 光学精密工程 2015年23卷第6期页码：1783-1790
- 作者机构：
  
  1. 上海航天电子技术研究所上海,201109
  2. 沈阳航空航天大学,辽宁沈阳,110013
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No.61072135)()
- DOI：10.3788/OPE.20152306.1783
  中图分类号： TP751
- 收稿日期：2014-10-28，
  
  修回日期：2014-12-21，
  
  纸质出版日期：2015-06-25
- 稿件说明：
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张宁, 冯书谊, 濮建福等. 多光谱遥感图像CCSDS动态码率控制近无损压缩[J]. 光学精密工程, 2015,23(6): 1783-1790

ZHANG Ning, FENG Shu-yi, PU Jian-fu etc. Dynamic rate control for CCSDS nearly lossless compression of multispectral remote image[J]. Editorial Office of Optics and Precision Engineering, 2015,23(6): 1783-1790
张宁, 冯书谊, 濮建福等. 多光谱遥感图像CCSDS动态码率控制近无损压缩[J]. 光学精密工程, 2015,23(6): 1783-1790 DOI： 10.3788/OPE.20152306.1783.

ZHANG Ning, FENG Shu-yi, PU Jian-fu etc. Dynamic rate control for CCSDS nearly lossless compression of multispectral remote image[J]. Editorial Office of Optics and Precision Engineering, 2015,23(6): 1783-1790 DOI： 10.3788/OPE.20152306.1783.

摘要

基于空间数据系统咨询委员会(CCSDS-123.0-B-1)推荐的多光谱图像无损压缩算法

提出了一种前向自适应调整量化步长的码率控制方法以实现定码率近无损压缩.介绍了CCSDS标准的预测方法

分析了Golomb-Rice编码的上界与下界的范围.通过分析预测误差均值与压缩比的对应关系

建立了均值与压缩比之间近似线性映射曲线.根据预测误差均值

前向自适应估计量化步长

初步控制Golomb-Rice码长.考虑到星载条件下多光谱图像码率控制策略

通过压缩比反馈微调量化步长

实现压缩码率的精确控制.最后总结了CCSDS多光谱近无损压缩码率控制流程.实验结果表明

值(Golomb编码变量)的分布区域稳定

在4:1压缩时

本文方法的峰值信噪比(PSNR)平均为60.42 dB

比单谱段JPEG2000、差分JPEG-LS压缩等方法提高了5.51 dB和2.89 dB.实验显示本文方法码率控制准确

易于硬件实现

适合航天工程使用.

Abstract

On the basis of CCSDS-123.0-B-1 lossless compression algorithm of multi-spectral image recommended by the Consultative Committee for Space Data Systems(CCSDS)

a rate control method of forward adaptive quantifying step size was proposed to achieve the nearly lossless compression with a fixed rate. The prediction method of CCSDS was introduced and the ranges of the upper bound and lower bound of Golomb-Rice coding were analyzed. By analyzing the relationship between prediction error and the compression rate

their approximate linear mapping curves were established. According to the mean value of prediction error

the quantization step size was adaptively estimated and the Golomb-Rice coding length was preliminarily controlled. In addition

taking the multi-spectral image rate control strategy under spaceborne conditions into account

the compression code rate was precisely controlled by fine tuning the quantization step size according to the feedback of compression rate. At last

the processes of CCSDS nearly lossless compression rate control method was presented. The experiment results show that distribution area of

(Golomb coding variables) is stable. At the compression rate of 4:1

the Peak Signal to Noise Ratio(PSNR)from the proposed method is 60.42 dB averagely

which is increased by 5.51 dB and 2.89 dB as compared with those from JPEG2000 and differential JPEG-LS methods respectively. The rate control method is accurate

easy to be implemented in hardware and suitable for aerospace engineering.

关键词

Keywords

references

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