Obstacle-detecting apparatus

Details Obstacle-detecting apparatus Obstacle-detecting apparatus

1992-08-07

1994-07-19

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

340522, 348149, G08B 1300, H04N 718

Patent

active

053313127

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.

REFERENCES:
patent: 3365572 (1968-01-01), Strauss
patent: 4063283 (1977-12-01), Rider et al.
patent: 4578665 (1986-03-01), Yang
patent: 4807027 (1989-02-01), Muto

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