Obstacle-detecting apparatus
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United States of America Patent
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Jul 19, 1994
Grant Date -
N/A
app pub date -
Aug 7, 1992
filing date -
Aug 23, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This device can detect an obstacle in a railroad crossing or similar setting by way of image processing independently of a height and a width of an obstacle. The image data read from a video, camera 11 into a multi-valued image memory 13 is compared with background data stored in a background-data creating unit 15 in a data comparator 16. Based on the compared result, a still-object detector 17 detects if an obstacle exists. If it is detected that an obstacle exists and a rod of a crossing gate is down in a gate state detector 18, an alarm output unit 19 serves to output an alarm signal.
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