Einrichtung zur Gefahrenraumueberwachung an einem Bahnuebergang

The apparatus has a video camera (1) to which is connected a downstream image analysis unit (2). The image analysis unit (2) is arranged to automatically carry out a grey level analysis of the image of the level crossing observed by the video camera (1), to detect objects of at least a predetermined minimum size in the dangerous area. The image analyser (1) may carry out an individual image analysis for object detection, in which several test lines are provided transverse to the tracks. The grey level profile of an individual image is detected along each test line. The images are smoothed to eliminate the narrow grey level pulses. Jumps in the grey levels greater than a predetermined threshold may then be analysed as an object to be detected. The video camera is preferably arranged over the middle area of the level crossing, with an image depth device running parallel to the tracks. ADVANTAGE - Detects presence of objects on level crossing, such as cars on track when crossing gates are closed