改进的插值法用于干涉成像光谱仪影像条带噪音去除

李湘眷; 杨建峰; 薛彬

doi:doi:10.3788/gzxb20103901.0164

光子学报, 2010, 39 (1): 164, 网络出版: 2010-03-11

改进的插值法用于干涉成像光谱仪影像条带噪音去除

Destriping IIM Images with Modified Linear Interpolation Algorithm

论文大纲

李湘眷 ^1,2,*杨建峰 ¹薛彬 ¹

作者单位

¹ 中国科学院西安光学精密机械研究所,西安 710119

² 中国科学院研究生院,北京 100049

摘要

针对嫦娥一号(CE-1)干涉成像光谱仪影像中的条带噪音,通过常用的频域滤波方法和线性插值法进行了干涉成像光谱仪条带去除试验,并提出结合了三阶插值的改进线性插值方法.对噪音点定位后,根据图像中噪音点上下行相应点的数值差别是否超过预设阈值,确定是采用线性插值还是三阶插值算法,修正噪音点像素值.实验结果的均值和标准偏差以及图像质量因子(IQ因子)的比较表明:改进的方法IQ值达到13.908 1,而线性插值算法为9.842 8,改进的线性插值方法在去除干涉成像光谱仪影像条带噪音方面明显优于线性插值方法.

Abstract

Aiming at the striping noise existing in IIM (the Imaging Interferometer carried by Chang’E Lunar Orbiter) data,the Fourier transform algorithm and the linear interpolation algorithm are experimentally utilized for strip noise removal in IIM images.A modified linear interpolation algorithm is proposed,which combines low rank algorithm with high rank algorithm.After noise location,high rank interpolation or linear interpolation is used by judging whether the pixel difference between the upper and lower lines goes up to the threshold.Comparison of mean values,standard deviations,and the IQ (Image Quality) factor shows that this modified method is evidently superior to the linear algorithm because the IQ factor of two methods is respectively 13.908 and 19.842 8.

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李湘眷, 杨建峰, 薛彬. 改进的插值法用于干涉成像光谱仪影像条带噪音去除[J]. 光子学报, 2010, 39(1): 164. LI Xiang-juan, YANG Jian-feng, XUE Bin. Destriping IIM Images with Modified Linear Interpolation Algorithm[J]. ACTA PHOTONICA SINICA, 2010, 39(1): 164.

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