从序列图像中获取点目标三维运动参数

本文研究了摄像机有机动,而点目标在短时间内作匀速直线运动的情形.研究表明,只要点目标——摄像机相对运动方程满足可观测性条件,那么就可从三幅序列图像中确定点目标的三维运动参数,进而估计出它的空间坐标.文中还对算法的抗干扰能力进行了分析,结果表明,摄像姿态以及点目标——摄像机相对运动方程的曲率是影响算法抗干扰能力的两大因素。最后给出了计算机模拟结果.

On Estimation of 3-D Motion Parameters of a Single Point from Image Sequences

In some cases,one object is so far away from an observer that it beco-mes a single point.The estimation of motion parameters of a single point is diffe-rent from that of a rigid object and has its own features.In this paper,the methodof motion estimation of a single point when the camera is power-driven and thesingle point makes uniform motion is discussed.It is proved that three image seq-uences are sufficient to guarantee uniqueness of solution,provided the relativemotion equation of the camera and the single point satisfies the measurable cond-ition of the single point.Furthermore,the noise resistance of the algorithm wasanalyzed.The results of the analysis showed that there were two main factorsinfluencing the noise resistance of the algorithm,one being the posture of the ca-mera,and the other the curvaturc of the relative moving equation of the signlepoint and the camera.Finally,simulations were conducted to demonstrate thefeasibility of the algorithm.