Electro-optical stereo pair displays and alternating-pair displays are both viable methods for true 3-D representation of computer-generated images. Stereo and Alternating-Pair Techniques for Display of Computer-Generated Images Larry F. Hodges and David F. McAllister North Carolina State University Three-dimensional display of images based on the phenomenon of binocular parallax has long been of interest to both practitioners and researchers in a number of fields. Current application areas include medical imag- ing, robot control systems, cartography, computer-aided design, and human vision research." Display systems based on binocular parallax can be classified according to the format of the data presented and by the viewing format. When categorizing by display format, we divide systems into two groups: multiplanar displays and stereoscopic displays. Multiplanar displays use a sequence of cross-sectional image data; examples include vari-focal mirrors4 rotating mirrors,5 and de Mon- tebello's Synthalyzer.6 Stereoscopic displays are based on angularly displaced views of an object. In this category we place all systems that present dual-perspective views of an image to the viewer. The two perspectives are referred to as a stereo pair of an image. 0272-1716/85/0900/0038$01.00 1985 IEEE IEEE CG&A 38