Outdoor gallery and its photometric issues
Outdoor gallery and its photometric issues
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室外画廊及其光度问题
DOI：
10.1145/1900179.1900254
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
B. Lu
中科院分区：
文献类型：
--
作者：
K. Ikeuchi;Takeshi Oishi;M. Kagesawa;A. Banno;Rei Kawakami;Tetsuya Kakuta;Yasuhide Okamoto;B. Lu
我们一直在飞鸟京开发一个户外画廊系统。飞鸟京是古都之一，以拥有众多寺庙、宫殿和建筑而闻名。然而，在十四个多世纪之后，大部分资产已经恶化。室外画廊系统借助混合现实（MR），在原址向参观者展示古代飞鸟京的虚拟面貌。为了在室外画廊系统中重建虚拟飞鸟京，需要处理相对于现有前景和阴影将虚拟物体正确合成到真实场景中的遮挡问题。此外，由于不可预测的光照变化，室外环境使任务变得更加困难。本文提出了新颖的室外照明约束来解决室外画廊系统室外环境中的前景遮挡问题。这些约束还可以集成到多个线索的概率模型中，以便更好地分割前景。此外，我们介绍了一种通过使用球面视觉相机进行阴影检测和重铸来解决阴影遮挡问题的有效方法。我们已将该方法应用到飞鸟京的室外画廊系统中，并验证了该方法的有效性。
We have been developing an outdoor gallery system in Asukakyo. Asukakyo is one of the ancient capitals, which is well-known to has lots of temples, palaces and buildings. Nevertheless, most of the assets have been deteriorated after more than fourteen centuries. The outdoor gallery system introduces the virtual appearance of ancient Asukakyo to visitors at the original site with the help of Mixed Reality (MR). To reconstruct the virtual Asukakyo in the outdoor gallery system, it is necessary to handle occlusion problem in synthesizing virtual objects correctly into the real scene with respect to existing foregrounds and shadows. Furthermore, outdoor environment makes the task more difficult due to the unpredictable illumination changes. This paper proposes novel outdoor illumination constraints for resolving the foreground occlusion problem in outdoor environment for the outdoor gallery system. The constraints can be also integrated into a probabilistic model of multiple cues for a better segmentation of the foreground. In addition, we introduce an effective method to resolve the shadow occlusion problem by using shadow detection and recasting with a spherical vision camera. We have applied the method in our outdoor gallery system in Asukakyo and verified the effectiveness of the method.