Some preliminary results on using spatial locality to speed up ray tracing of stereoscopic images

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Abstract
Display of a stereoscopic scene requires the generation of two differently projected views of a scene, referred to as the left-eye image and the right-eye image. Stereoscopic images exhibit spatial locality in that the relative displacement between the left-eye and right-eye viewing positions is small enough such that the left and right-eye images are similar in many respects. In this paper we present an algorithm that takes advantage of spatial locality to significantly reduce the computation time needed to ray trace the right-eye image of a stereo pair by using the information available in the left-eye image. The algorithm is derived by combining the repmjection algorithm presented described by Badt for fast generation of animation frames with the stereoscopic perspective projection technique presented in Hodges, et. 1,4
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