摘要
目前,靶场姿态测量以多台套交会测量为主,对于单站姿态测量尚没有较好的解决方案。为了解决该问题,以投影轴对称目标为例,提出了一种基于中轴线像长匹配的单站姿态测量方法。将透视投影拓展为2种等效形式,将体现目标姿态状态的中轴线向像面透视投影,可获得中轴线的投影像长或在等效物面的等效物长,根据目标中轴线的先验长度、相机内外参数及成像信息,经像长匹配即可获取目标的偏航角和俯仰角;实际工程试验验证了该算法的可行性,偏航角精度为1.7°,俯仰角精度约1°,满足靶场单站测姿需求;并对姿态测量模型关键因素进行了误差分析。该方法可适用于非投影轴对称目标。
To solve the question of no effective solution for single station pose measurement,a single station attitude measurement method based on length matching of central axis is proposed to measure projected-axisymmetric targets.Perspective projection is extended into two equivalent forms,which will reflect central axis of target attitude state.Image length of center axis or equivalent length of equivalent surface can be obtained by projection of image plane.According to a priori length of target axis,internal and external parameters of the camera and imaging information,pitching and yaw angle can be obtained through image matching by axis image length matching.Practical engineering test verifies the feasibility of this algorithm.Precision of pitch and yaw angle is 1.7° and 1° respectively,which can meet the needs of single station pose measurement in range.Finally,key factors concerning error of pose measurement model are analyzed.This method can be adapted to the non-projected-axisymmetric targets.
出处
《应用光学》
CAS
CSCD
北大核心
2017年第5期746-750,共5页
Journal of Applied Optics
基金
军内科研项目(2013SYB6010)
关键词
像长匹配
单站姿态测量
投影轴对称目标
透视投影等效形式
image length matching
single station pose measurement
projected-axisymmetric target
equivalent form of perspective projection
