| 多光谱图像获取中光照不均匀性的非线性校正算法 |
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| 引用本文： | 刘振.多光谱图像获取中光照不均匀性的非线性校正算法[J].中国印刷物资商情,2013(1):23-27,32. |
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| 作者姓名： | 刘振 |
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| 作者单位： | [1]曲阜师范大学印刷学院,日照276826 [2]武汉大学印刷与包装系,武汉430079 |
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| 基金项目： | 国家973重点基础研究发展计划——文化遗产数字化保护的理论与方法（No.2012CB725302） |
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| 摘 要： | 为降低多光谱图像数据获取过程中光照不均匀性造成的影响,本研究对多光谱成像系统中获取设备——多光谱相机的CCD响应特性进行了分析,建立非线性光照不均匀性校正算法。针对大尺度物体表面光照特性,通过Cheby-shev多项式对光照分布曲面进行非线性拟合,进而对光照不均匀性造成的CCD响应误差进行了校正。实验结果表明：本研究提出的非线性校正方法可以很好地降低光照不均匀性的影响,在目前的校正方法中,效果最理想。
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| 关 键 词： | 多光谱图像 获取 非线性校正 光照不均匀性 Chebyshev多项式 |
Non-linear Correction Algorithm of Illumination Non-uniformity for Multi-spectral Image |
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| LIU Zhen.Non-linear Correction Algorithm of Illumination Non-uniformity for Multi-spectral Image[J].China Printing Materials Market,2013(1):23-27,32. |
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| Authors: | LIU Zhen |
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| Institution: | LIU Zhen (1.College of Graphic Arts,Qufu Normal University,Rizhao 276826,China;2.School of Printing and Packaging, Wuhan University,Wuhan 430079,China) |
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| Abstract: | In order to reduce the impact of non - uniform illumination on multi - spectral image acquisition,the response characteristic of multi - spectral cameras was analysed,then,a non - linear correction model of non - uniform illumination was built. Especially aiming at the illumination characteristic of large scale target,the illumination distribution curved surface was fitted using Chebyshev polynomials,and then the error of camera response was corrected.The experimental results showed that the proposed method is effective for reducing the impact of non - uniform illumination and is the best among the recent methods. |
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| Keywords: | Multi-spectral image Acquisition Non-linear correction Illumination non-uniformity Chebyshev polynomials |
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