LANE DEPARTURE WARNING/ASSISTANCE METHOD AND SYSTEM HAVING A THRESHOLD ADJUSTED BASED ON DRIVER IMPAIRMENT DETERMINATION USING PUPIL SIZE AND DRIVING PATTERNS
First Claim
1. A method comprising:
- identifying a driver of a vehicle;
determining that a completed profile is available corresponding to the driver;
retrieving the completed profile from a corresponding vehicle memory;
collecting impairment indication data;
comparing the impairment indication data to data corresponding to the retrieved completed profile;
determining, based on the comparison of the impairment indication data to the data corresponding to the completed profile, that the driver is to be treated as an impaired driver;
adjusting a lane departure warning/assistance threshold of a lane departure detector based on the comparison of the impairment indication data to the data corresponding to the retrieved completed profile data; and
outputting a warning or providing lane departure assistance based on the adjusted lane departure warning/assistance threshold.
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Accused Products
Abstract
A method/system for lane departure warning/assistance that warns the driver that the vehicle is about to leave a current lane and enter an adjacent lane. The driver is identified, and a corresponding profile is accessed. The driver'"'"'s pupils may be measured and compared to pupil size baseline data stored in the accessed profile. If the difference in pupil size exceeds a pupil size baseline by more than a deviation level, the method/system may adjust a lane departure warning/assistance threshold of a lane departure detector that warns the driver each time the vehicle is getting too close to an adjacent lane, thus alerting the driver that the vehicle may drift into the next lane. Driving patterns, such as steering angles and braking force, may also be used to adjust the lane departure warning/assistance threshold and determine whether the driver may benefit from lane departure warning/assistance.
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Citations
20 Claims
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1. A method comprising:
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identifying a driver of a vehicle; determining that a completed profile is available corresponding to the driver; retrieving the completed profile from a corresponding vehicle memory; collecting impairment indication data; comparing the impairment indication data to data corresponding to the retrieved completed profile; determining, based on the comparison of the impairment indication data to the data corresponding to the completed profile, that the driver is to be treated as an impaired driver; adjusting a lane departure warning/assistance threshold of a lane departure detector based on the comparison of the impairment indication data to the data corresponding to the retrieved completed profile data; and outputting a warning or providing lane departure assistance based on the adjusted lane departure warning/assistance threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A device comprising:
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a processor; a memory coupled to the processor; an image processing module coupled to the processor and configured to process an image to determine a pupil size; and a pupil size comparator configured to receive the pupil size of the image and compare the pupil size of the image to a pupil size corresponding to a user'"'"'s profile stored in the memory, the pupil size comparator further configured to output a result of the pupil size comparison; wherein the processor is configured to adjust a lane departure warning/assistance threshold of a lane departure detector based on the result of the pupil size comparison. - View Dependent Claims (15, 16)
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17. A system comprising:
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a first sensor or camera configured to capture an image of a driver'"'"'s pupil; a second sensor or camera configured to determine a distance between a lane marker and a vehicle; and a vehicle control unit configured to; receive an image of the driver'"'"'s pupil and the distance between the lane marker and the vehicle, the vehicle control unit configured to determine if the driver is impaired based at least in part on the image of the driver'"'"'s pupil, adjust an encroachment threshold of a lane departure detector when the driver is determined to be impaired, determine that the vehicle is encroaching on the lane marker by comparing a distance between the lane marker and the vehicle to the adjusted encroachment threshold, and output a warning signal when the driver is impaired and the vehicle is encroaching on the lane marker. - View Dependent Claims (18, 19, 20)
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Specification