基于角点检测的摄像机标定算法及应用
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摘要
针对摄像机标定在航拍视频应用中所存在的问题,分析了传统标定法、自标定法和基于主动视觉标定方法的不足,总结了影响标定精度的关键所在,进而结合改进的棋盘格角点检测算法和改进的三参数模型标定方法,保证了物理信息的输入和标定过程的准确性。通过完成摄像机标定可以利用摄像机参数对图像进行畸变校正,从而进行视场角的测量。实验证明,该算法适用性广,稳定性好,精度高,具有一定的实用性和有效性。
Camera calibration in aerial video applications,the problem existing in the traditional calibration method,self cali-bration method and calibration method based on active vision,the key to effect the precision of calibration are summarized,andthen combined with improved checkerboard corner detection algorithm and improved three parameters of the model calibration meth-od,the physical information input and the accuracy of the calibration process are guaranteed. Through the complete camera calibra-tion can take advantage of the camera parameters on image distortion correction,and thus for the viewing angle measurement. Exper-iments show that the algorithm applicability is wide and good stability,high precision,has certain practicability and validity.
Camera calibration in aerial video applications,the problem existing in the traditional calibration method,self cali-bration method and calibration method based on active vision,the key to effect the precision of calibration are summarized,andthen combined with improved checkerboard corner detection algorithm and improved three parameters of the model calibration meth-od,the physical information input and the accuracy of the calibration process are guaranteed. Through the complete camera calibra-tion can take advantage of the camera parameters on image distortion correction,and thus for the viewing angle measurement. Exper-iments show that the algorithm applicability is wide and good stability,high precision,has certain practicability and validity.
引文
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[15]何均均,胡良梅,等.偏振探测系统的摄像机标定与图像畸变校正研究[J].信号处理,2011,27(11):1780-1785.HE Junjun,HU Haimei,et al. Research on camera cali-bration and image distortion correction in polarization de-tection system[J]. Signal Processing,2011,27(11):1780-1785.
[2]Zhang Z Y.A Flexible New Technique for Camera Calibra-tion[J]. IEEE Transactions on pattern Analysis and Ma-chine Intelligence,2000,22(11):1330-1334.
[3]伍雪冬,蒋新华.计算机视觉中传统摄像机定标方法综述[J].福建工程学院学报,2007,1(5):57-61.WU Xuedong,JIANG Xinhua. Asurvey of traditional cam-era positioning methods in computer vision[J]. Journal ofFujian Institute of Engineering,2007,1(5):57-61.
[4]谭晓波.摄像机标定及相关技术研究(学位论文)[D].长沙:国防科学技术大学,2004.TAN Xiaobo. Camera calibration and related technology re-search(dissertation)[D]. Changsha:national universityof defense technology,2004.
[5]胡占义,吴福朝.基于主动视觉的摄像机标定方法[J].计算机学报,2002,25(11):1149-1156.HU Zhanyi,WU Fuzhao. Camera calibration method basedon active vision[J]. Chinese journal of computers,2002,25(11):1149-1156.
[6]王民钢,王超.基于Harris的角点检测改进算法[J].计算机仿真,2012,29(11):294-298.WANG Mingang,WANG Chao. Improved corner detectionalgorithm based on Harris[J]. Computer simulation,2012,29(11):294-298.
[7]侯建辉,林意.自适应的Harris棋盘格角点检测算法[J].计算机工程与设计,2009,30(20):4741-4743.HOU Jianhui,LIN Yi. Adaptive Harris corner detection al-gorithm[J]. Computer Engineering and Design,2009,30(20):4741-4743.
[8]王晓辉,程健庆,韩瑜.摄像机标定的棋盘格角点自适应检测算法[J].计算机应用,2014,34(S1):199-202.WANG Xiaohui,CHENG Jianqing,HAN Yu. Camera cali-bration of checkerboard corners adaptive detection algo-rithm[J]. Journal of computer applications,2014(S1):199-202.
[9]杨彦景.摄像机标定与畸变图像矫正算法的设计与实现[D].沈阳:东北大学,2008.YANG Yanjing. camera calibration and the design and im-plementation of image distortion correction algorithm[D].Shenyang:Northeastern university,2008.
[10]王晓辉,程健庆,韩瑜.基于改进模型的摄像机标定[J].电子测量技术,2013,36(12):40-44.WANG Xiaohui,CHENG Jianqing,HAN Yu. Based onthe improved model camera calibration[J]. Journal ofelectronic measurement technology,2013,4(12):40-44.
[11]Alexander Velizhev. GML camera calibrate toolbox[EB/OL]. http://graphics. cs.msu.ru/. 2011,12.
[12]陈选育.数字图像非线性畸变校正方法研究[D].成都:成都理工大学,2008.CHEN Xuanyu. Digital image nonlinear distortion correc-tion method research[D]. Chengdu:Chengdu universityof technology,2008.
[13]Jean-Yves Bouguet,Camera calibration toolbox for mat-lab[EB/OL].(2010-07-09)[2011-12-20]. http://www.vision.caltech.edu/bouguetj/calicalib_doc/.
[14]孙玉青.摄像机定标与图像校正算法研究[D].太原:太原理工大学,2010.SUN Yuqing. Research on camera calibration and imagecorrection algorithm[D]. Taiyuan:Taiyuan university oftechnology,2010.
[15]何均均,胡良梅,等.偏振探测系统的摄像机标定与图像畸变校正研究[J].信号处理,2011,27(11):1780-1785.HE Junjun,HU Haimei,et al. Research on camera cali-bration and image distortion correction in polarization de-tection system[J]. Signal Processing,2011,27(11):1780-1785.