EpiScope: Optical Separation of Reflected Components by Rotation of Polygonal Mirror

Separating reflection components is an important task in computer graphics and vision. Episcan3D has been proposed to separate the direct and indirect reflection components in real-time. This method uses a scanning laser projector and a rolling shutter camera, so it requires unmanageably precise geometric alignment and temporal synchronization. In this paper, we propose a novel optical system that achieves the same function without imaging devices. In this method, the ray directions of projection, observation, and presentation are optically and mechanically synchronized by a rotating polygonal mirror. The direct or indirect components can be selected by a mask-based light-field filter. Especially, the selected reflection components can be seen directly by our naked eye, and there are no restrictions on image quality or delays in presentation due to the number of pixels or frame rate of the imaging system.