Studies on High-Definition 3D Digital Archives by Photometric Active Lighting

该研究扩展了基于图像的渲染（IBR），以表示虚拟环境中真实物体的镜面。一个物体的照片捕捉到一个由几个物理成分组成的图像：它的形状、颜色、纹理、反射率和照明条件。本文的目的是研究如何保持物体的镜面，这是相当敏感的照明条件。像IBR一样，它需要通过PC投影仪或平板PC显示器改变照明模式的图像集。当显示对象时，它重新调用图像集，并根据用户指定的照明条件实时检索最合适的图像。由于用户可以虚拟地改变照明条件，因此在显示器上产生虚拟照明条件下具有高光和高光的外观。所提出的成像技术适用于虚拟博物馆或数字档案。对于高端的闪亮物体的数字化存档，我们必须强调捕捉物体存在的全部信息；它的形状、颜色、纹理、镜面和光照条件。本研究以镜面和光照条件为研究重点，扩展IBR技术构建了代表闪亮物体的原型成像系统。

This research has resulted an extension of Image-Based Rendering (IBR) to represent the specularity of a real object in a virtual environment. A photo of an object captures an image consisting of several physical components : its shape, color, texture, specularity and the lighting condition. This paper is intended as an investigation of how to preserve the specularity of an object, which is considerably sensitive to the lighting condition. Like IBR, it takes an image set changing a lighting pattern by a PC projector or a flat PC display. When displaying the object, it re-calls the image set and does realtime image retrieval of the most suitable image according to a user assigned lighting condition. As the user is able to change the lighting condition virtually, the appearance with highlight and specularity under the virtual lighting condition is produced on a monitor. The proposed imaging techniques are applicable to virtual museum or digital archives.For high-end digital archiving of shiny objects, we have to emphasize to capture the whole information of object existing ; its shape, color, texture, specularity and the lighting condition. This research focuses the specularity and the lighting condition, and construct the prototype imaging system by extending IBR technology for representing shiny object.