Title :
Using an active vision system to compute time-until-impact
Author :
Dias, Jorge ; Batista, Jorge ; Araujo, Helder ; De Almeida, Anibal T.
Author_Institution :
Dept. of Electr. Eng., Coimbra Univ., Portugal
Abstract :
Describes the use of an experimental system for active vision to compute time-until-impact. The time-until-impact is evaluated by using the principle of the human visual fixation process. The mechanical system enables the positioning of the cameras´ support platform by means of three rotational degrees of freedom and also the control of the vergence angle of each camera. The motors used are stepper motors which are controlled by a system specifically designed and built for this purpose. Each camera´s lens has three degrees of freedom, corresponding to zoom, focus and aperture. All the control system electronics as well as the system status data acquisition electronics are integrated in a single control unit. This control unit is connected to a system responsible for the active vision system motion generation
Keywords :
cameras; computer vision; image segmentation; position control; stepping motors; active vision system; aperture; focus; human visual fixation process; mechanical system; motion generation; rotational degrees of freedom; stepper motors; system status data acquisition electronics; time-until-impact; vergence angle; zoom; Apertures; Cameras; Computer vision; Control systems; Data acquisition; Humans; Lenses; Machine vision; Mechanical systems; Motion control;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1993. Proceedings of the IECON '93., International Conference on
Conference_Location :
Maui, HI
Print_ISBN :
0-7803-0891-3
DOI :
10.1109/IECON.1993.339330
