Correct perspective is crucial to orthostereoscopy. That is to say, the observer must view from the same points in space, relative to the image, that the stereo camera's lenses had relative to the scene. Errors in placement of the observation points result in distortion of the reconstructed stereo image. Although people adapt easily to visual distortions, they may not do it well enough or quickly enough for critical telepresence and telerobotic applications. Further, it is difficult for humans to reliably determine by sight the correct observation point relative to an image. A mathematical guide to correct perspective is therefore useful. The mathematical key to perspective is that all images must subtend at the eye the same angles which the objects that generated them subtended at the camera. The center of perspective on the object side of a camera is the entrance pupil, but where is the center of perspective on the image side of an asymmetrical lens? A simple formula simply derived answers that question. By way of background, pertinent optics and stereoscopic reconstruction errors, including perspective error, are reviewed in this paper. New work begins in the fourth section.
Image-side perspective and stereoscopy
Stereoscopic Displays and Virtual Reality Systems V ; 1998 ; San Jose,CA,USA
Proc. SPIE ; 3295
1998-04-30
Conference paper
Electronic Resource
English
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