单标记实时场景光源检测算法  

Light Source Detection Algorithm in Real-time Scene Based on Single Tag

作　　者：孙博文[1] 孙健 唐贝贝 SUN Bo-wen;SUN Jian;TANG Bei-bei(School of Computer Science and Technology,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学计算机科学与技术学院,黑龙江哈尔滨150080

出　　处：《哈尔滨理工大学学报》2018年第6期133-137,共5页Journal of Harbin University of Science and Technology

摘　　要：增强现实中的光照一致性是使虚拟物体获得真实感的重要手段,它能使计算机生成的虚拟物体很好的融合到真实场景当中。为了更好的实现增强现实系统中的光照一致性,对现有的光源检测算法进行改进,提出一种基于单标记的实时场景光源检测算法。该方法通过采集识别标记在各个方位的亮度信息确定出光源的方向;通过识别标记和虚拟物体之间的亮度对比确定光源的亮度;通过获取标记物上未喷墨部分的颜色,确定光源的颜色。实验证明,在满足增强现实应用的实时性和稳定性的同时,使用本文的光源检测算法所估计出的虚拟光源与真实光源方向之间的角度差值平均在4. 3度,并可以使虚拟物体正确的产生阴影。The illumination coherence in augmented reality is an important means that makes virtual objects get realistic.It can make the computer-generated virtual objects blend into the real scene.In order to archieve the illumination coherence of augmented reality,this paper modifies the present algorithm and proposes a algorithm based on single tag.This new method collects the brightness of the identification marking in any direction to make sure which direction the light source might be;it compares the brightness of the identification marking with the brightness of the virtual objects to ensure the brightness of the light source;it determines the color of the light source by getting the color of the marker portion of no inkjet.Experiments show that in meet the real-time and stability at the same time,the average angle between the virtual light source which is estimated by using the algorithm in this paper and the true source is4.3degrees,and the virtual objects can correctly cast shadows.

关 键 词：光源检测 光照一致性 虚实融合 增强现实 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]