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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 36 — Dec. 20, 2009
  • pp: 6841–6850

Computer generated hologram from point cloud using graphics processor

Rick H.-Y. Chen and Timothy D. Wilkinson  »View Author Affiliations


Applied Optics, Vol. 48, Issue 36, pp. 6841-6850 (2009)
http://dx.doi.org/10.1364/AO.48.006841


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Abstract

Computer generated holography is an extremely demanding and complex task when it comes to providing realistic reconstructions with full parallax, occlusion, and shadowing. We present an algorithm designed for data-parallel computing on modern graphics processing units to alleviate the computational burden. We apply Gaussian interpolation to create a continuous surface representation from discrete input object points. The algorithm maintains a potential occluder list for each individual hologram plane sample to keep the number of visibility tests to a minimum. We experimented with two approximations that simplify and accelerate occlusion computation. It is observed that letting several neighboring hologram plane samples share visibility information on object points leads to significantly faster computation without causing noticeable artifacts in the reconstructed images. Computing a reduced sample set via nonuniform sampling is also found to be an effective acceleration technique.

© 2009 Optical Society of America

OCIS Codes
(090.1760) Holography : Computer holography
(090.2870) Holography : Holographic display
(100.6890) Image processing : Three-dimensional image processing
(090.5694) Holography : Real-time holography

ToC Category:
Holography

History
Original Manuscript: August 14, 2009
Revised Manuscript: November 10, 2009
Manuscript Accepted: November 27, 2009
Published: December 10, 2009

Citation
Rick H.-Y. Chen and Timothy D. Wilkinson, "Computer generated hologram from point cloud using graphics processor," Appl. Opt. 48, 6841-6850 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-36-6841

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