A visually effective stereoscopic CRT display technique has been developed which uses continuous tone computer graphics in combination with electro-optic shutter viewing devices. The technique involves the generation of left and right perspective views of an object model using continuous tone computer graphics. The perspective views constitute stereo pairs and are displayed in an alternating manner on the even and odd field scans of a conventional 2:1 interlace raster scan CRT display. When viewed with electro-optic shutters operated synchronously with the CRT field scan rate, the alternating perspective views are perceived as stereoscopic images with strong binocular depth-of-field sensations. Lightweight stereoscopic viewing glasses have been developed which use lead lanthanum zirconate titanate (PLZT) ceramics as electronically controlled shutter elements. Representative applications of the stereoscopic display technique to dynamic flight simulation and complex molecular modeling are presented. The flight simulation illustrates a landing sequence on an aircraft carrier while the modeling application shows complex three-dimensional structures of double helix DNA and bacterial ferredoxin molecules. The stereoscopic display technique has been shown to be highly effective for adding binocular depth-of-field to computer graphics displays with a resulting enhancement of object model realism.

Two-dimensional transform coding and hybrid transform/DPCM coding techniques have been investigated extensively for image coding. This paper presents a theoretical and experimental extension of these techniques to the coding of sequences of correlated image frames. Two coding methods are analyzed: three-dimensional cosine transform coding, and two-dimensional cosine transform coding within an image frame combined with DPCM coding between frames. Theoretical performance estimates are developed for the coding of Markovian image sources. Simulation results are presented for transmission over error-free and binary symmetric channels.