增强现实中抛掷动作速度的预测

Throwing velocity prediction on augmented reality

结合增强现实抛掷虚拟物体的应用背景,提出一种新的预测抛掷动作速度的方法。首先利用二维三次多项式函数分段循环拟合抛掷动作的速度曲线,并运用函数的最大值分析出抛掷动作速度的大小;然后利用三维三次多项式函数分段循环拟合抛掷动作的轨迹曲线,由抛掷动作速度曲线的切线方向即可确定抛掷动作速度的方向。实验结果表明,可更为容易地获得抛掷动作速度的大小和方向,克服了对每个空间位置坐标准确性的依赖;同时,能保证虚拟物体和真实物体的运动轨迹一致性,有利于提高增强现实应用的运动一致性。

The new prediction model for the throwing velocity is established based on application background of throwing virtual object on augmented reality. Firstly, two dimensions three order polyno- mial functions are used to fit velocity curve of throwing, and the maximum value of function is used to obtain the value of throwing velocity. Secondly, three dimensions three order polynomial functions are used to fit trajectory curve of throwing, the tangential direction is the throwing direction based on the moment of throwing. Simulation results show the value and direction of throwing is acquired easily through the new method, overcome the accurate dependency of each position in space. Besides, it can ensure the coherence of trajectory between virtual and real objects, which provides a benefit to the coherence of trajectory of augmented reality application.