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2018 IEEE International Conference on Computational Photography (ICCP) (2018)
Pittsburgh, PA, USA
May 4, 2018 to May 6, 2018
ISSN: 2472-7636
ISBN: 978-1-5386-2527-9
pp: 1-10
Hiroyuki Kubo , Nara Institute of Science and Technology
Suren Jayasuriya , Carnegie Mellon University
Takafumi Iwaguchi , Nara Institute of Science and Technology
Takuya Funatomi , Nara Institute of Science and Technology
Yasuhiro Mukaigawa , Nara Institute of Science and Technology
Srinivasa G. Narasimhan , Carnegie Mellon University
ABSTRACT
Separation of light transport into direct and indirect paths has enabled new visualizations of light in everyday scenes. However, indirect light itself contains a variety of components from subsurface scattering to diffuse and specular interreflections, all of which contribute to complex visual appearance. In this paper, we present a new imaging technique that captures and analyzes these components of indirect light via light transport between epipolar planes of illumination and rays of received light. This plane-to-ray light transport is captured using a rectified projector-camera system where we vary the offset between projector and camera rows (implemented as synchronization delay) as well as the exposure of each camera row. The resulting delay-exposure stack of images can capture live short and long-range indirect light transport, disambiguate subsurface scattering, diffuse and specular interreflections, and distinguish materials according to their subsurface scattering properties.
INDEX TERMS
Cameras, Lighting, Delays, Synchronization, Multiplexing, Scattering
CITATION

H. Kubo, S. Jayasuriya, T. Iwaguchi, T. Funatomi, Y. Mukaigawa and S. G. Narasimhan, "Acquiring and characterizing plane-to-ray indirect light transport," 2018 IEEE International Conference on Computational Photography (ICCP), Pittsburgh, PA, USA, 2018, pp. 1-10.
doi:10.1109/ICCPHOT.2018.8368461
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