靶场飞行目标弱透视投影姿态测量可行性研究
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摘要
为了探讨弱透视投影应用于靶场远距离、小视场姿态测量的可行性,以轴对称回转体目标为例,充分利用透视成像信息及弱透视投影原理,逆向推导了单站弱透视投影的姿态测量模型,实际试验结果证明了弱透视投影在靶场姿态测量中的可行性,在文中所述的试验环境下,弱透视投影与透视投影之间误差不超过0.05°;明确了在靶场远距离、小视场姿态测量环境下,弱透视投影误差主要来源于作用距离;推导了算法适用的极限作用距离。以上研究为靶场弱透视投影远距离、小视场姿态测量奠定了一定的理论基础。
The objective of this paper is to explore feasibilities on attitude measurement of flying targets of remote and small field of view in range using weak perspective projection.Taking axis symmetric rotating object as an example,attitude measurement module of monocular vision is derived reversely by using projection image information and weak perspective projection principle.Experiment results verifies feasibilities of range attitude measurement in weak perspective projection,Under mentioned testing environments,error between weak perspective projection and perspective projection is less than 0.05°,and it mainly derives from operation range.Ultimate operating range is derived with algorithm applied.This study above lays a theoretical foundation for attitude measurement of flying targets of remote and small field of view in range.
The objective of this paper is to explore feasibilities on attitude measurement of flying targets of remote and small field of view in range using weak perspective projection.Taking axis symmetric rotating object as an example,attitude measurement module of monocular vision is derived reversely by using projection image information and weak perspective projection principle.Experiment results verifies feasibilities of range attitude measurement in weak perspective projection,Under mentioned testing environments,error between weak perspective projection and perspective projection is less than 0.05°,and it mainly derives from operation range.Ultimate operating range is derived with algorithm applied.This study above lays a theoretical foundation for attitude measurement of flying targets of remote and small field of view in range.
引文
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[2]Zhang Sanxi,Zhang Weiguang,Li Hongkai,et al.Ballistic characteristic parameters of vision measurement[M].Beijing:National Defence Industry Press,2014:1-15,110-150.张三喜,张伟光,李宏凯,等.弹道特征参数摄像测量[M].北京:国防工业出版社,2014:1-15,110-150.
[3]Radu Horaud,Fadi Doenaika,Bart Lamitory,et al.Object pose:the link between weak perspective,paraperspective,and full perspective[J].International Journal of Computer Vision,1997,22(2),1997,173-189.
[4]Fadi Dornaika,Christophe Garcia.Pose estimation using point and line correspondences[J].Real-Time Imaging,1999(5):215-230.
[5]Zhao Rujin,Liu enhai,Zhang wenming,et al.Measurements of 3Dpose of objects based on weak perspective model[J].Acta Photonica Sinica,2014,42(3):182-187.赵汝进,刘恩海,张文明,等.一种基于弱透视成像模型的目标姿态测量方法[J].光子学报,2014,42(3):182-187.
[6]Zhao Xueyan,Li Yingchun,Optical measurement in shooting range[M].Beijing,National Defense Press,2001:168-230.赵学颜,李迎春.靶场光学测量[M].北京:国防大学出版社,2001:168-230.
[7]Zhang Guangjun.Vision measurement[M].Beijing,Science Press,2008.张广军.视觉测量[M].北京:科学出版社,2008.
[8]Zhang Zhuxun,Zhang Jianqing.Digital photogrammetry[M].Wuhan:Wuhan University Press,2002.张祖勋,张剑清.数字摄影测量学[M].武汉:武汉大学出版社,2002.
[9]Liu Lisheng.Exterior ballistic measurement data processing[M].Beijing:National Defence Industry Press,2002.刘利生.外弹道测量数据处理[M].北京:国防工业出版社,2002.
[10]Wang Zhizhuo.The principles of photogrammetry[M].Wuhan:Wuhan University Press,2007.王之卓.摄影测量原理[M].武汉:武汉大学出版社,2007.