We present a method for measurement and reconstruction of light fields in finite spaces. Using a custom-made device called a plenopter, we can measure spatially and directionally varying radiance distribution functions from a real-world scene up to their second-order spherical harmonics approximations. Interpolating between measurement points, we can recover this function for arbitrary points of a scene. We visualized the global structure of the light field using light tubes, which gives an intuitive description of the flux propagation throughout three-dimensional scenes and provides information about the quality of light in the scenes. Our second-order reconstructions are sufficient to render convex matte objects and therefore have a direct interest for computer graphics applications.
© 2009 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: September 16, 2008
Revised Manuscript: November 19, 2008
Manuscript Accepted: November 25, 2008
Published: January 12, 2009
Alexander A. Mury, Sylvia C. Pont, and Jan J. Koenderink, "Representing the light field in finite three-dimensional spaces from sparse discrete samples," Appl. Opt. 48, 450-457 (2009)