运用视频技术的快速三维旋转分析与计算的研究

Research on Fast 3-D Rotation Calculation Based on Video Techniques

着重讨论了基于光流场的旋转运动矢量的估计方法,它是一种非接触式的运动测量技术,对特殊的场合具有很重要的应用价值。研究中运用的是光流场特征法,即首先建立刚体运动方程,然后根据特征点对坐标,采用两步迭代交替法计算出运动方程参数,进而计算出测量对象的旋转矢量。为了提高运算的速度,对投影平面上的位移矢量测量采用了基于灰度编码的位平面的块匹配算法,该算法中以简单的逻辑异或运算来完成两帧中的特征块匹配搜索,以降低运算复杂度。最后通过一组实验验证了测量结果是比较准确的。

This paper discussed the calculation method of rotation based on optical flow. Which is a non-touch measur- ing technique,and has important value in some special occasions. It is to set up rigid motion equations by optical flow character, and then using two-step iterative method to estimate motion equation and calculate rotation speed for each co- ordinate axis. In order to improve the computing speed, the matching algorithm based on gray-coded bit plane block is a- dopted in the measurement for displacement vector on the projection plane. The calculation is less complex because two characteristics blocks searching is done with simple logical XOR. The experiment results show the calculation is accu- rate.