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1. 中国科学院 长春光学精密机械与物理研究所,吉林 长春,中国,130033
2. 中国科学院 研究生院,北京 100039
收稿日期:2005-11-22,
修回日期:2006-05-18,
纸质出版日期:2006
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田宝凤, 徐抒岩, 孙荣春, 闫得杰. 一种适合星上应用的遥感图像有损压缩算法[J]. 光学精密工程, 2006,14(4): 725-730
TIAN Bao-feng, XU Shu-yan, SUN Rong-chun, WANG Xin, YAN De-jie. A lossy compression algorithm of remote sensing image suited to space-borne application[J]. Editorial Office of Optics and Precision Engineering, 2006,14(4): 725-730
田宝凤, 徐抒岩, 孙荣春, 闫得杰. 一种适合星上应用的遥感图像有损压缩算法[J]. 光学精密工程, 2006,14(4): 725-730 DOI:
TIAN Bao-feng, XU Shu-yan, SUN Rong-chun, WANG Xin, YAN De-jie. A lossy compression algorithm of remote sensing image suited to space-borne application[J]. Editorial Office of Optics and Precision Engineering, 2006,14(4): 725-730 DOI:
提出了一种高质量的遥感图像有损压缩算法
在分析了遥感图像经Daubechies 双正交小波基D5/3整数小波变换后各子带小波系数统计特性和能量分布的基础上
引入了人类视觉特性
用它来控制算法中的量化方案。根据能量的大小确定不同子带对于目标识别的重要程度
选择不同的量化阈值和量化步长进行量化
并对量化后的数据采用固定比特平面编码。仿真实验表明
该算法对于不同内容和纹理的图像
在一定的压缩比下
均获得了PSNR(峰值信噪比)>30 dB的恢复图像
在不损失最低频信息的同时较好地保持了遥感图像中丰富的高频信息
实现了高质量的图像压缩
并且算法简便
快捷
所占用的存储容量小
易于硬件实现
适合于星上应用
减少了在遥感图像压缩中小目标的丢失。
A high quality lossy compression algorithm of remote sensing image was presented. After decomposition of the remote sensing image by D5/3 integer wavelet transform and analysis of the statistical characteristic and the energy distribution of wavelet coefficients in each sub-band
the human vision properties are introduced to control the quantification scheme of the algorithm. The important degree for target recognition is determined according to energy in each sub-band
and the different quantification threshold values and the quantification steps are chosen in the quantification. Finally
quantified data are coded in fixed bit-plane. The simulation experiment shows that this algorithm acquires the restoration images of PSNR(Peak Signal Noise Radio)>30 dB for all images of different contents and texture with certain CR
which keeps much high frequency information of the remote sensing image to realize the high quality image compression. Because of its simplicity
fastness
and small storage
the algorithm is easy to be realized in hardware and suitable for space-borne application.
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