Image analysis – Applications – Vehicle or traffic control
Patent
1996-01-24
1998-05-26
Stoll, Thomas L.
Image analysis
Applications
Vehicle or traffic control
382154, 340901, 340437, 340441, 340466, 340467, 348113, 364423098, G06K 900
Patent
active
057579490
ABSTRACT:
A warning system estimates the possibility of the off-course travel of a vehicle while traveling through a curve before the vehicle enters the curve and gives the driver a warning properly. The warning system comprises an image recognizing means for obtaining three-dimensional image data on the road extending ahead of the vehicle and the traffic environment lying ahead of the same by recognizing conditions of the road and the traffic, a curve detecting means for detecting a curve on the basis of the image data before the vehicle enters the curve, a turning speed calculating means for calculating a reference turning speed at which average drivers will drive the vehicle traveling the curve on the basis of the radius of curvature of the curve and the width of the lane represented by the image data, a relative curve sharpness detecting means for deciding whether or not the relative sharpness of the curve is critical by comparing the reference turning speed with the actual traveling speed of the vehicle, and an off-course travel estimating means for deciding, when the relative sharpness detecting means decides that the relative sharpness of the curve is critical, whether or not the driver has carried out danger avoiding operations from signals indicating decelerating operations, and, if any danger avoiding operation is not executed, deciding that off-course travel is possible and giving a warning.
REFERENCES:
patent: 5081585 (1992-01-01), Kurami et al.
patent: 5208750 (1993-05-01), Kurami et al.
patent: 5315295 (1994-05-01), Fujii
patent: 5350912 (1994-09-01), Ishida
patent: 5359666 (1994-10-01), Nakayama et al.
Arai Kazumasa
Ikeda Atsushi
Kinoshita Masahiro
Fuji Jukogyo Kabushiki Kaisha
Stoll Thomas L.
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