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Proceedings Paper

Calibration system for a new 3D autostereoscopic device based on angular differentiation
Author(s): Miguel A Lazaro; Juan D. Montes; Pascual Campoy; Jesus Gomez; Francisco Penafiel; Luis Fernandez; Rafael Aracil
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Paper Abstract

This paper presents the calibration of a new autostereoscopic system called realvisor, where the image seen at each point of the screen depends on the angle from which the point is seen. In the developed prototype 40 images of the same 3D scene, which are projected through 8 objectives and 5 separate flat mirrors, should match to each other on the back of the screen. To obtain the 3D effect, the corresponding points of each image should be projected on the same place on the screen. This fact cannot be achieved without a calibration of the whole system and the subsequent correction of the images due to different distortions suffered by the images in two stages: (1) non-linear deformations produced by the film register and (2) a lack of optical and mechanical accuracy in the manufactured system. The methodology used for this non-uniform deformation of the pixels within each image is based on computing one table for each image, which indicates the correspondence between the pixels of the ideal image and the distorted one on the screen. These tables calibrate the system and are used for correcting all mentioned distortions. This technique has provided excellent results with the first prototype, obtaining a matching accuracy of less than 1 mm on the screen, enough for achieving the visual concordance and the subsequent 3D effect.

Paper Details

Date Published: 30 March 1995
PDF: 8 pages
Proc. SPIE 2409, Stereoscopic Displays and Virtual Reality Systems II, (30 March 1995); doi: 10.1117/12.205853
Show Author Affiliations
Miguel A Lazaro, Univ. Politecnica de Madrid (Spain)
Juan D. Montes, REALVISION SA (Spain)
Pascual Campoy, Univ. Politecnica de Madrid (Spain)
Jesus Gomez, REALVISION SA (Spain)
Francisco Penafiel, Univ. Politecnica de Madrid (Spain)
Luis Fernandez, Univ. Politecnica de Madrid (Spain)
Rafael Aracil, Univ. Politecnica de Madrid (Spain)

Published in SPIE Proceedings Vol. 2409:
Stereoscopic Displays and Virtual Reality Systems II
Scott S. Fisher; John O. Merritt; Mark T. Bolas, Editor(s)

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