增强现实中的光照一致性研究

摘要

Illumination consistency in augmented reality is the key to assure the good fusion of virtual objects and real scene.It can make the virtual objects imitated by the computer appear more real after fusing with the real scene.Therefore, there has the need to process the shadow effect of the virtual objects according to the illumination distribution situation in real scene so as to eliminate floating sensation of the virtual objects.Aiming at high real-time requirements in dynamic scene, we improve current illumination estimation algorithm and filter the light source with clustering algorithm, these have perfectly solved the illumination consistency problem of virtual and real scene in dynamic environment.Experimental results show that by using the improved algorithm mentioned in this article, it is able to achieve vivid shadowing visual effect, and meanwhile the system keeps good real-time property.%增强现实中的光照一致性是确保虚拟物体和真实场景很好融合的关键，它能使计算机模拟出的虚拟物体与真实场景相融合后显得更加真实。因此需要根据真实场景中光照分布情况，对虚拟物体做阴影处理，从而消除虚拟物体的飘浮感。针对动态场景中的高实时性要求，对现有的光照估计算法进行改进，并应用聚类算法对光源进行筛选，较好地解决了动态环境下虚实场景的光照一致性问题。实验结果表明，采用所提出的改进算法，能够得到逼真的阴影视觉效果，同时系统具有良好的实时性。