| 摘要 |
<p>Apparatus for controlling a lift door in which a detection zone (10) is illuminated with an infrared light source (15) and reflected light is received by image sensing means (18). A data processing means (17) is programmed to analyse video information stored in a video memory (22) and a reference field memory (23) so as to distinguish an object approaching the lift doors (1, 2) from an object passing by the lift, and also distinguishes stationary objects in the path of the lift doors (1, 2) from background objects. In a preferred embodiment, a low resolution image sensing means (18) is used and video information is binned and stored in the video memory (22). <IMAGE></p> |
