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Proceedings Paper

Beyond parallax barriers: applying formal optimization methods to multilayer automultiscopic displays
Author(s): Douglas Lanman; Gordon Wetzstein; Matthew Hirsch; Wolfgang Heidrich; Ramesh Raskar
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Paper Abstract

This paper focuses on resolving long-standing limitations of parallax barriers by applying formal optimization methods. We consider two generalizations of conventional parallax barriers. First, we consider general two-layer architectures, supporting high-speed temporal variation with arbitrary opacities on each layer. Second, we consider general multi-layer architectures containing three or more light-attenuating layers. This line of research has led to two new attenuation-based displays. The High-Rank 3D (HR3D) display contains a stacked pair of LCD panels; rather than using heuristically-defined parallax barriers, both layers are jointly-optimized using low-rank light field factorization, resulting in increased brightness, refresh rate, and battery life for mobile applications. The Layered 3D display extends this approach to multi-layered displays composed of compact volumes of light-attenuating material. Such volumetric attenuators recreate a 4D light field when illuminated by a uniform backlight. We further introduce Polarization Fields as an optically-efficient and computationally efficient extension of Layered 3D to multi-layer LCDs. Together, these projects reveal new generalizations to parallax barrier concepts, enabled by the application of formal optimization methods to multi-layer attenuation-based designs in a manner that uniquely leverages the compressive nature of 3D scenes for display applications.

Paper Details

Date Published: 7 February 2012
PDF: 13 pages
Proc. SPIE 8288, Stereoscopic Displays and Applications XXIII, 82880A (7 February 2012); doi: 10.1117/12.907146
Show Author Affiliations
Douglas Lanman, MIT Media Lab. (United States)
Gordon Wetzstein, MIT Media Lab. (United States)
Matthew Hirsch, MIT Media Lab. (United States)
Wolfgang Heidrich, The Univ. of British Columbia (Canada)
Ramesh Raskar, MIT Media Lab. (United States)


Published in SPIE Proceedings Vol. 8288:
Stereoscopic Displays and Applications XXIII
Andrew J. Woods; Nicolas S. Holliman; Gregg E. Favalora, Editor(s)

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