基于移动增强现实的实时软阴影绘制算法  

ALGORITHM OF REAL-TIME SOFT SHADOW RENDERING BASED ON MOBILE AUGMENTED REALITY

作　　者：郭巾铭[1] 陈一民[1] 黄晨[1] 

机构地区：[1]上海大学计算机工程与科学学院,上海200444

出　　处：《计算机应用与软件》2016年第9期212-214,230,共4页Computer Applications and Software

摘　　要：由于移动设备的计算能力和存储空间有限,基于移动终端的光照估计和实时软阴影绘制技术和研究很少,提出一种适用于移动增强现实的实时软阴影绘制算法。根据移动终端光线传感器的数值来计算光源的方向,得到模拟的点光源,在该点光源附近均匀采样得到多个虚拟光源,叠加每个虚拟光源产生的阴影效果,实时绘制出软阴影。实验结果表明,在保证移动终端良好的虚实融合效果的情况下,采用该算法具有良好的实时性,为移动终端软阴影的绘制提供了有效的解决方法。Constrained by computing capability and storage space of mobile devices, the mobile terminal-based illumination estimation and real-time soft shadow rendering techniques and studies are quite few. We proposed a real-time soft shadow rendering algorithm applicable for mobile augmented reality. First it calculates the directions of light source according to the illumination intensity value of light sensor at mobile terminal and obtains the simulated point light source. Secondly, it makes uniform sampling around the point light source to get a couple of virtual light sources. At last, it overlays the shadow effects from every virtual light source and obtains the soft shadow in real-time rendering result. Experimental result showed that under the condition of ensuring good blending effect of virtuality and reality at mobile terminal, the use of the proposed algorithm has good real-time property, this provides the effective solution for soft shadow rendering of mobile terminals.

关 键 词：软阴影 光照估计 移动增强现实 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]