“Visualizing Light Transport Phenomena with a Primal-Dual Coding Video Camera” by O’Toole and Kutulakos
Conference:
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Entry Number: 26
Title:
- Visualizing Light Transport Phenomena with a Primal-Dual Coding Video Camera
Presenter(s):
Description:
We present a primal-dual coding video camera, an optical device that captures video in which the flow of light through a scene has been manipulated. This camera has the ability to visualize indirect transport effects (caustics, inter-reflections, volumetric scattering, etc.), measure direct-only light paths (surface reflections), capture transport that occurs within specific regions of 3D space, and per- form structured light imaging in the presence of complex indirect effects. The operating principle behind this technology is to simul- taneously code the light that goes into a scene with the light that comes out. Specifically, over the course of a single camera expo- sure period, we project a sequence of light patterns onto the scene in lockstep with a second sequence of mask patterns that modu- lates the light incident on the camera sensor. This optical procedure creates RAW, unprocessed photos where a scene’s light transport function appears to have changed.
References:
O’TOOLE, M., RASKAR, R., AND KUTULAKOS, K. N. 2012. Primal-dual coding to probe light transport. ACM Trans. Graph..
O’TOOLE, M., MATHER, J., AND KUTULAKOS, K. N. 2014. 3d shape and indirect appearance by structured light transport. In Proc. CVPR.
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