基于三维立体标志物的增强现实实时渲染  

Augmented reality real-time rendering based on three-dimensional marker

作　　者：王薇婕[1] 万韬阮[1,2] 林静[1] 关丹丹[1] 

机构地区：[1]西安工程大学电子信息学院,陕西西安710048 [2]英国布拉德福德大学媒体与信息学院

出　　处：《纺织高校基础科学学报》2012年第2期213-216,共4页Basic Sciences Journal of Textile Universities

基　　金：陕西省教育厅科研计划项目资助(11JK1000)

摘　　要：提出了一种基于三维立体标志物的增强现实实时渲染系统.该系统利用物体的反光特性估算现实场景中的光源位置,通过阴影算法为增强现实系统生成可信度高的实时阴影.为了得到准确的实时光照信息,此系统在原有ARToolkit标志物的基础上将2D标志物改为3D标志物,免去了以往算法前期的大量计算,根据物体上获得的光照信息生成实时的阴影.结果表明,此系统可快速地检测到室内光源的位置和数量,生成的实时阴影真实度高,使增强现实环境中的虚拟物体和真实物体能产生近乎一致的光照阴影效果.A real-time system based on three-dimensional marker to estimate the positions of the light source in reality scene is presented. And the real-time and highly credible shadow for augmented reality using a shadow algorithm is generated. In order to obtain accurate real-time lighting irrformation, 2D ARToolKit marker is changed to 3D marker,eliminating the need for large number of pre-calculations of the previous algorithm, and then according to the obtained information of the light source,the real-time shadow is generated. The experiment results show that this system could detect the positions and number of the indoor light sources at a high rate of speed. And the generated real-time shadow is highly credible. The virtual lights and shadow estimated by this method can generate consistent effect in the real environment.

关 键 词：增强现实 实时阴影 三维标志物 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]