To achieve accurate 3D positioning and real-time tracking of moving objects,a video positioning method using multiple orthogonal cameras together with an iterative algorithm that approaches the coordinates of the 3D objects alternately is proposed. The optical axes of the cameras are set along axes of an orthogonal coordinate and all cameras are pointed to the origin of coordinate. Unlike the most of current computer vision method, the iterative algorithm does not involve image alignment operation, which could affect the positioning efficiency and precision. The convergence of the iterative algorithm is proved. Numerical examples and practical tests show that the proposed method is simple to compute, insensitive to errors, and has a rapid rate of convergence,thus has a great potential in application.%为实现目标的快速、精确3维定位和跟踪,提出一种正交摄像机视频定位系统及其坐标轮流逼近的迭代定位算法.系统中平面摄像机光轴按照正交方式布置,拍摄方向均指向原点.不同于现有的大部分计算机视觉方法,本算法中没有影响定位效率和精度问题的图像配准操作.证明了迭代算法的收敛性.数值验证和实际试验表明,本算法计算简单、误差稳定性好,收敛快,因此具有良好的应用潜力.
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