| 控制点排列对图像校正的影响及重复校正 |
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| 引用本文： | 赖国俊,申功炘.控制点排列对图像校正的影响及重复校正[J].北京航空航天大学学报,2009,35(10):1214-1219. |
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| 作者姓名： | 赖国俊 申功炘 |
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| 作者单位： | 北京航空航天大学航空科学与工程学院,北京,100191;北京航空航天大学航空科学与工程学院,北京,100191 |
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| 基金项目： | 国家自然科学基金，985基金二期资助项目 |
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| 摘 要： | 针对在DSPIV(Digital Stereo Particle Image Velocimetry)的图像几何校正中,校正板上控制点的排列方式对图像校正误差所产生的影响,在使用双调和样条函数构建校正映射函数的条件下,分别使用了11列×21行、21列×21行、11列×41行、21列×41行和16列×31行5种控制点等列距、等行距排列的校正板来进行图像校正,计算了这5种控制点排列方式对应的校正准度和校正精度.另外,为进一步减小图像校正误差,还提出了对经过校正所得的图像进行重复图像校正.实验结果表明:随着控制点数目的增加,校正准度和校正精度会相应提高;经过重复图像校正的校正准度和校正精度优于一次校正的结果,但需要耗费更多的图像处理时间.
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| 关 键 词： | 数字体视粒子图像测速技术(DSPIV) 双调和样条函数 控制点排列方式 重复校正 |
| 收稿时间： | 2008-10-06 |
Image mapping approach based on biharmonic spline interpolation concerning dot arrangement and multi-mapping |
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| Lai Guojun,Shen Gongxin.Image mapping approach based on biharmonic spline interpolation concerning dot arrangement and multi-mapping[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(10):1214-1219. |
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| Authors: | Lai Guojun Shen Gongxin |
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| Institution: | School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | To obtain connection between dot arrangement on mapping board and image mapping error of digital stereo particle image velocimetry(DSPIV),five mapping boards with rectangular dot pattern covering aera of same size were used respectively to perform image mapping.Dot spacing in these dot pattern was equal in row and in column.A biharmonic spline function based on the Green function was employed as mapping model in this process.Statistic value of absolute differences between dot-center coordinates after mappin... |
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| Keywords: | digital stereo particle image velocimetry ( DSPIV ) biharmonic spline interpolation dot arrangement multi-mapping |
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