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Stereoscopic Vision for Long Distances

The goal of this study was to test the effect of hyper-stereopsis on long distance estimations. We conducted an experiment to compare the ratio between depth-distances and frontal-distances estimations. Four simulated distances from the participant, i.e., 200, 400, 800 and 1000 meters, were tested under four conditions. The first was "no stereopsis" (natural view of long distances, in which stereoscopic depth cannot be perceived at all). The other three conditions were computerized simulations of hyper-stereopsis, namely 0.5, 1 and 2 meters between the eyes. The results indicated that hyper-stereopsis, which enables stereoscopic vision even at long distances, improve the depth-distances estimation. This advantage joins other known advantages of stereoscopic vision, including improvement of target detection and identification.