Improved viewpoint entropy to evaluate material appearance under various lighting positions
Improved viewpoint entropy to evaluate material appearance under various lighting positions
复制标题
改进的视点熵以评估各种照明位置下的材质外观
DOI：
10.1007/s10043-019-00563-x
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Norimichi Tsumura
中科院分区：
文献类型：
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作者：
Shoji Yamamoto;Yuto Hirasawa;Ryota Domon;Hiroshi Kintou;Norimichi Tsumura
在本文中，我们提出了一个有用的计算方法来执行基于感知的照明位置的选择，强调CG对象的材料外观。该方法是基于传统的观点熵，这是用来找到一个合适的视角。为了找到适合材料外观的镜头，我们首先使用眼动追踪设备识别具有与材料外观相关的光泽反射信息的重要表面。其次，我们通过增加一个权重系数来强调重要表面，从而修改了视点熵方程。由于该观点熵保留了对象形状、光线方向和观看方向的独立性，因此我们提出的方法只能提取最能代表材料外观的重要光线位置。通过改变CG物体的形状和材质的验证结果，我们证实了我们对照明位置的选择与主观评价的良好一致性，主观评价是在选择适当的场景时强调材料外观。
In this paper, we proposed a useful calculation method to perform the perception-based selection of lighting position that emphasizes the material appearance of CG object. The proposed method is based on the conventional viewpoint entropy which is used to find an appropriate viewing angle. To find an appropriate shot for material appearance, we first identified the important surface that has information of gloss reflection related to material appearance with eye tracking equipment. Next, we modified the equation of viewpoint entropy by adding a weight coefficient for emphasizing at important surface. Since this viewpoint entropy retains the independency for object shape, light direction, and viewing direction, our proposed method can extract only important light position which is most representative of the material appearance. From the results of verification with changing shape and material of CG object, we confirmed that our selection of lighting position accomplishes the fine agreement with subjective evaluation which is imposed on the selection of appropriate scene with emphasis of material appearance.
DOI：
10.2352/cic.2012.20.1.art00017
发表时间：
2012
期刊：
International Conference on Communications in Computing
影响因子：
--
作者：
Shoji Yamamoto;Masashi Sawabe;Natsumi Hosokawa;Y. Yamauchi;N. Tsumura
通讯作者：
N. Tsumura