Perceived orientation of axis of rotation and accuracy in discriminating fixed-axis from nordixed-axis rotations were investigated for orthographic projections of three-dimensional rotating objects. The principal findings were (a) the slant of the axis of rotation was systematically misperceived; (b) in both two-view and multiview displays, the perceived slant of the axis of rotation was well-predicted by the ratio between the deformation (a property of the first-order optic flow) and the component parallel to the image plane of the global velocity vector; (c) if this ratio was kept constant in each frame transition of the stimulus sequence (or it was varied), then the stimuli tended to be judged as fixed-axis rotations (or as nonfixed-axis rotations), regardless of whether they simulated a fixed-axis rotation or not; and (d) the tilt of the axis of rotation was perceived in two-view displays with a very small error.
Perceived orientation of axis rotation in structure-from-motion / C. CAUDEK; DOMINI F.. - In: JOURNAL OF EXPERIMENTAL PSYCHOLOGY-HUMAN PERCEPTION AND PERFORMANCE. - ISSN 0096-1523. - STAMPA. - 24:(1998), pp. 609-621. [10.1037/0096-1523.24.2.609]
Perceived orientation of axis rotation in structure-from-motion
CAUDEK, CORRADO;
1998
Abstract
Perceived orientation of axis of rotation and accuracy in discriminating fixed-axis from nordixed-axis rotations were investigated for orthographic projections of three-dimensional rotating objects. The principal findings were (a) the slant of the axis of rotation was systematically misperceived; (b) in both two-view and multiview displays, the perceived slant of the axis of rotation was well-predicted by the ratio between the deformation (a property of the first-order optic flow) and the component parallel to the image plane of the global velocity vector; (c) if this ratio was kept constant in each frame transition of the stimulus sequence (or it was varied), then the stimuli tended to be judged as fixed-axis rotations (or as nonfixed-axis rotations), regardless of whether they simulated a fixed-axis rotation or not; and (d) the tilt of the axis of rotation was perceived in two-view displays with a very small error.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.