Computer-controlled stereoscopic camera base used to assess visual depth judgment under orthostereoscopic and nonorthostereoscopic conditions

Curtis S. Ikehara

doi:10.1117/12.430857

22 June 2001 Computer-controlled stereoscopic camera base used to assess visual depth judgment under orthostereoscopic and nonorthostereoscopic conditions

Curtis S. Ikehara

Author Affiliations +

Proceedings Volume 4297, Stereoscopic Displays and Virtual Reality Systems VIII; (2001) https://doi.org/10.1117/12.430857
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

A computer controlled stereoscopic camera system that produces precise and rapid changes of camera orientation and lens parameters is described and assessed. The system consists of a pair of cameras, each attached to a lens with a computer controlled zoom, focus and aperture. Cameras, at right angle to each other, are aimed through a half-silvered mirror to acquire the left and right images. Each camera is mounted on a motorized base that controls the camera separation and convergence angle. The computer controls camera separation from zero to 45 cm, with an accuracy of 0.1 cm, and the convergence angle of each camera from +/- 15 degrees off- center, with an accuracy of 0.02 degrees. Subjects viewed 27 conditions on a stereo monitor system where camera and target parameters were changed. There were three levels of convergence angle, camera separation and target intensity creating 27 viewing conditions. The subjects viewed all conditions and made depth judgments between four pairs of point source lights. Depth judgement results indicate that direct and remote views are consistent, subjects produce consistent judgments despite non-orthoscopic intervening camera configurations and judgments are consistent with varying system parameters.

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Curtis S. Ikehara "Computer-controlled stereoscopic camera base used to assess visual depth judgment under orthostereoscopic and nonorthostereoscopic conditions", Proc. SPIE 4297, Stereoscopic Displays and Virtual Reality Systems VIII, (22 June 2001); https://doi.org/10.1117/12.430857

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