摘要
为进一步提高增强现实系统的三维注册精度,分析了磁力跟踪系统误差产生原因,在坐标变换校正法的基础上,提出了一种自适应网格线性插值校正法,对跟踪器进行校正。该方法首先将系统所用的整个三维空间划分为空间网格,再建立磁力坐标与真实坐标的对应表,然后对网格进行自适应重划分,最后利用线性插值法对实时磁力坐标进行校正。对该方法进行了详细的分析说明,进行了相关实验,实验结果表明,该方法能够显著提高增强现实系统的跟踪精确度,使虚实结合更自然。
In order to enhance the accuracy of the registration in augmented reality system,the reasons which cased the error were ana-lyzed,and an approach named linear interpolation in an adaptive grid is proposed based on the method of coordinates system transforma-tion.At first,divided the whole work space into a grid,then constructed a lookup table in which the magnetic coordinates corresponded to the actual coordinates one by one,later on,redivided the grid using an adaptive algorithm,at last,rectified the real-time magnetic coordinates using linear interpolation method.Related experiments are carried out.The results of the experiments show that after the tracker is rectified with the above method,the precision of AR system is improved prominently,consequently to integrate the realty with the virtual scene more naturally.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第24期5785-5789,共5页
Computer Engineering and Design
基金
上海市重点学科建设基金项目(J50103)
关键词
增强现实
磁力跟踪
校正
坐标变换
自适应网格
线性插值
augmented reality
magnetic force tracker
calibration
coordinates system transformation
adaptive grid
linear interpolation method
