Programmable Non-Epipolar Indirect Light Transport: Capture and Analysis

The decomposition of light transport into direct and global components, diffuse specular interreflections, subsurface scattering allows for new visualizations in everyday scenes. In particular, indirect contains a myriad information about the complex appearance materials useful computer vision inverse rendering applications. this paper, we present imaging technique that captures analyzes components via using synchronized projector-camera system. rectified system illuminates scene with epipolar planes corresponding to projector rows, vary two key parameters capture plane-to-ray between row camera pixel: (1) offset rolling shutter (implemented as synchronization delay), (2) exposure row. We describe how performs illumination multiplexing, develop nonlinear optimization algorithm demultiplex resulting 3D operator. Using our system, are able live short long-range non-epipolar transport, disambiguate scattering, distinguish according their properties. show utility capturing analyzing hidden structure veins human skin.