| 在轨完成CCD非均匀性校正的方法 |
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| 引用本文： | 李丙玉,王晓东,李哲.在轨完成CCD非均匀性校正的方法[J].液晶与显示,2011,26(2):255-259. |
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| 作者姓名： | 李丙玉 王晓东 李哲 |
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| 作者单位： | 1. 中国科学院长春光学精密机械与物理研究所,吉林,长春,130033;中国科学院研究生院,北京,100039
2. 中国科学院长春光学精密机械与物理研究所,吉林,长春,130033 |
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| 摘 要： | 为使空间遥感相机图像具有良好的均匀性,利用XQ2VP40FPGA在轨实时完成TDI-CCD非均匀性校正。首先对CCD非均匀性校正原理进行分析,提出了半饱和灰度值和暗场灰度值的两点校正法;然后,介绍了空间遥感相机的系统结构,利用FPGA实现了校正算法;最后,通过实验对均匀性校正的有效性进行了验证。实验结果证明:FPGA在轨实时完成CCD非均匀性校正的方法是可行的,对于非均匀性5%的TDI-CCD,校正后非均匀性控制在1%以内。
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| 关 键 词： | 在轨 实时 TDI-CCD 暗场 非均匀性 |
Method of CCD Non-Uniformity Correcting in Orbit |
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| LI Bing-yu,WANG Xiao-dong,LI Zhe.Method of CCD Non-Uniformity Correcting in Orbit[J].Chinese Journal of Liquid Crystals and Displays,2011,26(2):255-259. |
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| Authors: | LI Bing-yu WANG Xiao-dong LI Zhe |
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| Affiliation: | LI Bing-yu1,2,WANG Xiao-dong1,LI Zhe1(1.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | In order to get space camera image with good uniformity,a method of real-time TDI-CCD non-uniformity correction in orbit using XQ2VP40 FPGA is studied.Firstly the principle of CCD non-uniformity correction is analyzed,a two-point correction algorithm of half saturation gray and dark field gray is proposed,then the architecture of space cameras is introduced and correction algorithm utilizing FPGA is realized,finally the effect is proved by experimental result.The experimental results show that the method of... |
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| Keywords: | in orbit real-time TDI-CCD dark field non-uniformity |
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