基于动态Light Map的增强现实光照算法

摘要

To achieve the correct lighting in Augmented Reality(AR) in time, a fast 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.%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Light Map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,井利用动态更新的Light Map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.