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Proceedings Paper

Calibrating camera and projector arrays for immersive 3D display
Author(s): Harlyn Baker; Zeyu Li; Constantin Papadas
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Paper Abstract

Advances in building high-performance camera arrays [1, 12] have opened the opportunity - and challenge - of using these devices for autostereoscopic display of live 3D content. Appropriate autostereo display requires calibration of these camera elements and those of the display facility for accurate placement (and perhaps resampling) of the acquired video stream. We present progress in exploiting a new approach to this calibration that capitalizes on high quality homographies between pairs of imagers to develop a global optimal solution delivering epipoles and fundamental matrices simultaneously for the entire system [2]. Adjustment of the determined camera models to deliver minimal vertical misalignment in an epipolar sense is used to permit ganged rectification of the separate streams for transitive positioning in the visual field. Individual homographies [6] are obtained for a projector array that presents the video on a holographically-diffused retroreflective surface for participant autostereo viewing. The camera model adjustment means vertical epipolar disparities of the captured signal are minimized, and the projector calibration means the display will retain these alignments despite projector pose variations. The projector calibration also permits arbitrary alignment shifts to accommodate focus-of-attention vengeance, should that information be available.

Paper Details

Date Published: 17 February 2009
PDF: 9 pages
Proc. SPIE 7237, Stereoscopic Displays and Applications XX, 72370A (17 February 2009); doi: 10.1117/12.807518
Show Author Affiliations
Harlyn Baker, Hewlett-Packard Labs. (United States)
Zeyu Li, Univ. of California, Berkeley (United States)
Constantin Papadas, Integrated Systems Development S.A. (Greece)

Published in SPIE Proceedings Vol. 7237:
Stereoscopic Displays and Applications XX
Andrew J. Woods; Nicolas S. Holliman; John O. Merritt, Editor(s)

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