Calibration system for a new 3D autostereoscopic device based on angular differentiation

Miguel A Lazaro; Juan D. Montes; Pascual Campoy; Jesus Gomez; Francisco Penafiel; Luis Fernandez; Rafael Aracil

doi:10.1117/12.205853

30 March 1995 Calibration system for a new 3D autostereoscopic device based on angular differentiation

Miguel A Lazaro, Juan D. Montes, Pascual Campoy, Jesus Gomez, Francisco Penafiel, Luis Fernandez, Rafael Aracil

Proceedings Volume 2409, Stereoscopic Displays and Virtual Reality Systems II; (1995) https://doi.org/10.1117/12.205853
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

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.

Citation Download Citation

Miguel A Lazaro, Juan D. Montes, Pascual Campoy, Jesus Gomez, Francisco Penafiel, Luis Fernandez, and Rafael Aracil "Calibration system for a new 3D autostereoscopic device based on angular differentiation", Proc. SPIE 2409, Stereoscopic Displays and Virtual Reality Systems II, (30 March 1995); https://doi.org/10.1117/12.205853

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KEYWORDS

Calibration

3D image processing

3D displays

Mirrors

Projection systems

Objectives

Optics manufacturing

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