Lei WANG, Masanori IDESAWA, and Qin WANG

Graduate School of Information Systems, The University of Eletro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan

(Received January 6, 2009; Accepted March 26, 2009)

The visibility of an approaching target on the horizontal plane in peripheral vision with binocular viewing was studied. It was found that the perceptual performance for the target moving toward the middle point of the two eyes was remarkably worse; under this circumstance it has rather high performance in the absence of one eye's target information with occlusion or falling on the blind spot. These facts imply that the conventional change disparity mechanism does not work in the peripheral visual field; while some simple combinations of the monocular information of two eyes, such as the sum of two eyes' image motion with sign, can be used to detect an approaching motion in the periphery.

Key words: approaching motion, peripheral visual field, binocular