Fusional Characteristics of Binocular Parallax as a Function of Viewing Angle and Viewing Distance of Stereoscopic Picture

Abstract

The visual space range of the image in a stereoscopic picture is important in evaluating a 3D image system. The visual space range is determined by both the system condition and fusional limits of the binocular parallax. First, this paper derives the relationship between the fusional limits of the binocular parallax and the depth of the reproduced image. Second, the limits are measured using a stereo-HDTV with two 40-inch CRTs and a one OHP-type stereoscopic picture with newly developed STEPOgraphy. Fusional limits are not affected by viewing distances greater than 1.5m in these results. Limits increase at a rate of about 10 arc minutes per arc degree of the stereoscopic picture viewing angle for uncrossed binocular parallax, and at a rate of about 5 arc minutes for crossed binocular parallax. At nearer distances, the effect with the viewing angle of the stereoscopic picture decreases. The viewing angle of the picture and the viewing distance satisfied with fusional limits are considered.