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Proceedings Paper

A scalable multi-DLP pico-projector system for virtual reality
Author(s): F. Teubl; C. Kurashima; M. Cabral; S. Fels; R. Lopes; M. Zuffo
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Paper Abstract

Virtual Reality (VR) environments can offer immersion, interaction and realistic images to users. A VR system is usually expensive and requires special equipment in a complex setup. One approach is to use Commodity-Off-The-Shelf (COTS) desktop multi-projectors manually or camera based calibrated to reduce the cost of VR systems without significant decrease of the visual experience. Additionally, for non-planar screen shapes, special optics such as lenses and mirrors are required thus increasing costs. We propose a low-cost, scalable, flexible and mobile solution that allows building complex VR systems that projects images onto a variety of arbitrary surfaces such as planar, cylindrical and spherical surfaces. This approach combines three key aspects: 1) clusters of DLP-picoprojectors to provide homogeneous and continuous pixel density upon arbitrary surfaces without additional optics; 2) LED lighting technology for energy efficiency and light control; 3) smaller physical footprint for flexibility purposes. Therefore, the proposed system is scalable in terms of pixel density, energy and physical space. To achieve these goals, we developed a multi-projector software library called FastFusion that calibrates all projectors in a uniform image that is presented to viewers. FastFusion uses a camera to automatically calibrate geometric and photometric correction of projected images from ad-hoc positioned projectors, the only requirement is some few pixels overlapping amongst them. We present results with eight Pico-projectors, with 7 lumens (LED) and DLP 0.17 HVGA Chipset.

Paper Details

Date Published: 7 March 2014
PDF: 8 pages
Proc. SPIE 8979, Emerging Digital Micromirror Device Based Systems and Applications VI, 89790N (7 March 2014); doi: 10.1117/12.2040402
Show Author Affiliations
F. Teubl, Univ. de São Paulo (Brazil)
C. Kurashima, Univ. Federal do ABC (Brazil)
M. Cabral, Univ. de São Paulo (Brazil)
S. Fels, Univ. of British Columbia (Canada)
R. Lopes, Univ. de São Paulo (Brazil)
M. Zuffo, Univ. de São Paulo (Brazil)

Published in SPIE Proceedings Vol. 8979:
Emerging Digital Micromirror Device Based Systems and Applications VI
Michael R. Douglass; Philip S. King; Benjamin L. Lee, Editor(s)

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