Position Estimation of Multiple Light Sources for Augmented Reality

摘要

In recent decades, advances in research and hardware have significantly improved the quality of augmented reality applications. However, efforts of combining real illumination and virtual illumination have made little progress thus far. In this paper, we propose the position estimation of multiple light sources using a specular reflective sphere placed in front of a camera for relighting in augmented reality applications. For position estimation, we take images to estimate light directions, and then, we estimate the positions of light sources in real time using a sequence of images taken by moving the camera. Our method improves illuminant integration, as more accurate shadows of virtual objects are obtained in comparison with the traditional methods of light source estimation. Further, we obtain not only the direction but also the position of light sources.