摘要
为实现增强现实系统中光照的实时准确性,提出一种基于动态LightMap的快速光照算法。该方法通过采集视频图像中校准物体的像素亮度,计算出摄像机的信号放大量和信号偏置,并利用动态更新的LightMap所记录的环境光照信息实现虚、实场景之间的一致光照,且能够适应光照变化的场景。实验结果表明该算法的显示速度能够达到实时交互的帧率。
To achieve the correct lighting in Augmented Reality（AR） in time, a last dynamic Light Map-based approach is presented. The pixel intensity of the calibration object in different video images is collected. The gain and the bias of the camera are computed. The environmental light condition is used which is recorded by the dynamic Light Map to augment the mixed scenes. If the illumination changes, new frames can update the Light Map immediately. Experimental results indicate that the approach can handle dynamic real-world illuminations and the updating speed is fast enough for real-time applications.
出处
《计算机工程》
CAS
CSCD
北大核心
2009年第21期261-263,共3页
Computer Engineering
基金
国家"973"计划基金资助项目(2007CB310900)
关键词
增强现实
光照
动态更新
Augmented Reality（AR）
illumination
dynamic updating
作者简介
谭茗（1982-），女，硕士研究生，主研方向：虚拟现实；E-mail：haochen@aimlab．org
陈浩，副教授、博士
孙建华，副教授、博士
