摘要
讨论了用于直升机着陆激光雷达地形测量系统的双目立体视觉方法,并利用双CCD系统实现了对激光器照射到固定目标表面上任意单点的三维空间坐标测量。首先应用最小二乘法对既定标定点三维空间坐标的测量进行了分析,提出了标定点列的优化原则;然后分析了正交约束条件对测距误差的影响,并建立了双CCD激光测距实验系统。理论分析和实验结果表明,选择经分布优化的标定点列和采用正交约束条件可以使目标点的各向测距误差在总体上得到优化,从而使得双CCD系统在近距测量中有较高的测量精度,适合于三维面形的测量。
A binocular stereovision technique used in 3-D terrain mapping system of helicopter radar is represented. By means of binocular camera system(2-CCD), the space position measurement of any point illuminated by a He-Ne laser is achieved. First, the calibration of points are analyzed with the least squares algorithm. Second, an effect of orthogonal constraint condition on the tolerance of laser range is analyzed. And a 2-CCD experiment system is established. The result shows that 2-CCD systems contribute to improve the range precision and are suitable for the measurement of 3-D terrain surface.
出处
《半导体光电》
CAS
CSCD
北大核心
2004年第3期219-223,共5页
Semiconductor Optoelectronics
基金
国家自然科学基金委员会及中国工程物理研究院联合基金资助项目
关键词
双CCD系统
三维测量
摄像机标定
优化原则
正交约束条件
binocular stereoscopic vision
3-D measurement
camera calibration
parameter matrix
orthogonal constraint condition