Driver photographing apparatus

Details Driver photographing apparatus Driver photographing apparatus

1994-08-10

1997-01-28

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

180272, G08B 2300

Patent

active

055981453

ABSTRACT:
A driver photographing apparatus that photographs images from reflections on the retinas of a driver in a vehicle having disturbance light using signal processing techniques. The apparatus comprises a light source for illuminating the driver with a first light beam along a first optical path, and a sensor that inputs a second light beam, along a second optical path, that includes reflections from the driver and disturbance light, to form an image of the driver. The light source and the sensor are disposed such that the first and second optical paths are along substantially the same axis. The apparatus further includes a processing circuit that eliminates the effect of the disturbance light on the image of the driver, and a detecting circuit that determines the action of the driver based on the driver's image.

REFERENCES:
patent: 2726380 (1955-12-01), Campisi
patent: 4397531 (1983-08-01), Lees
patent: 4854329 (1989-08-01), Walruff
patent: 5402109 (1995-03-01), Mannik
Merchant, Morrissette & Porterfield "Remote Measurement of Eye Direction Allowing Subject Motion Over One Cubic Foot of Space" IEEE Transactions on Biomedical Engineering, Jul. 1974, vol. BME-21, No. 4.
Patent Abstracts of Japan, vol. 9, No. 334, p. 103 (Pub. No. 60-158303), Dec. 1985.

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