| 多通道输出面阵CCD图像非均匀性校正 |
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| 引用本文： | 曲洪丰,王晓东,吕宝林.多通道输出面阵CCD图像非均匀性校正[J].液晶与显示,2012,27(4):569-572. |
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| 作者姓名： | 曲洪丰 王晓东 吕宝林 |
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| 作者单位： | 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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| 基金项目： | 国家自然科学基金(No.60507003) |
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| 摘 要： | 针对多通道面阵CCD输出非均匀性问题,开展了多通道输出面阵CCD图像非均匀性校正算法研究。论述了多通道面阵CCD输出非均匀性产生的原因,并对此提出了基于非线性响应的多段线性逼近校正算法,通过FPGA进行了算法实现。基于线性响应的两点校正算法精度低,且不能满足全量程的要求;基于非线性响应的多点校正算法精度高,但运算量大,不易于在FPGA上实现。文中提出的基于非线性响应的多段线性逼近校正算法,综合了以上两种算法的优点,具有运算量小、实用性强、精度高的优点。
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| 关 键 词： | 多通道输出 线性响应 非线性响应 多段线性逼近 |
| 收稿时间： | 2012/2/14 |
Non-Uniformity Correction of Mutiple Output Area CCD Image |
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| QU Hong-feng
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WANG Xiao-dong
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LV Bao-lin.Non-Uniformity Correction of Mutiple Output Area CCD Image[J].Chinese Journal of Liquid Crystals and Displays,2012,27(4):569-572. |
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| Authors: | QU Hong-feng WANG Xiao-dong LV Bao-lin |
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| Affiliation: | (Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences, Changchun 130033,China) |
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| Abstract: | The correction algorithm is researched to solve non-uniformity of multiple channels output of area-scan CCD image.Various factors are analyzed contributing to the non-linear behavior of multiple output CCD.The method of multi-section linear approaching correction is proposed.The algorithm principle and its simple realization method are introduced in details.The correction algorithm is realized based on FPGA.Multi-section linear approaching correction algorithm has higher precision than two-point correction algorithm.It also has lower operation load than multi-point correction algorithm.This method satisfies the camera nonuniformity correction requirements,has very strong practicality. |
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| Keywords: | multi-output linear response non-linear response multi-section linear approaching |
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