Recovery of 3D structure from motion and its statistical efficiency.

ABSTRACT

Investigated characteristics of the "structure from motion" in noise and compared performances of recovering a three-dimensional structure from motion (3D condition) with those of recovering a two-dimensional structure (2D condition). Ss in Exp 1 and 2 were the 2 Es (1 male and 1 female) and 1 graduate student who had normal vision in Japan. Ss were presented a pair of 3 dots corresponding to 3 apexes of triangles rotating around an axis projected onto a fronto-parallel plane. A Gaussian noise was added to the area of each triangle for each stimulus frame. Observers were required to discriminate areas of 2 triangles perceived with moving dots. Results were analyzed with a statistical efficiency approach. The results showed that significant difference was found between the efficiencies for 3D condition and 2D condition, and that the human efficiency and the percent of recovery decreased dramatically when the constraints were removed.

AUTHOR Tanaka, Miho; Ishiguchi, Akira

AFFILIATION Ochanomizu U, Dept of Psychology, Tokyo, Japan

SOURCE Japanese Journal of Psychology. 2000 Feb Vol 70(6) 485-493