Method and device for the detection of microsleep events
First Claim
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1. A method of alerting a vehicle operator to a microsleep event, the method comprising:
- determining a plurality of eye openness factors by measuring a plurality of distances between an upper eyelid and a lower eyelid of at least one eye over a time period;
generating graphical representations of the eye openness factors; and
correlating changes in the eye openness factors over the time period with a reference eye closure pattern indicative of the microsleep event; and
triggering an alarm so as to alert the operator when the eye openness factors, compared to a reference eye closure pattern, are indicative of the microsleep event.
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Abstract
Disclosed herein is a method of detecting a microsleep event in a subject. The method includes determining a number of eye openness factors by measuring a number of distances between an upper eyelid and a lower eyelid of at least one eye over a time period. Graphical representations of the eye openness factors are then generated. Changes in the eye openness factors over the time period are correlated with a reference eye closure pattern indicative of the microsleep event. Also disclosed is a microsleep event detection device.
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Citations
26 Claims
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1. A method of alerting a vehicle operator to a microsleep event, the method comprising:
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determining a plurality of eye openness factors by measuring a plurality of distances between an upper eyelid and a lower eyelid of at least one eye over a time period; generating graphical representations of the eye openness factors; and correlating changes in the eye openness factors over the time period with a reference eye closure pattern indicative of the microsleep event; and triggering an alarm so as to alert the operator when the eye openness factors, compared to a reference eye closure pattern, are indicative of the microsleep event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A microsleep event detection device, the device comprising:
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a facial image sampler for sampling facial images over time of a subject, the sampler having an infra red source for illuminating one or more eyes of the subject and for measuring the distance between upper eyelids and lower eyelids of the subject; a microprocessor connected to the sampler for receiving the sampled facial images, and for converting the sampled facial images to graphical representations of eye openness factors; a non-transitory memory electronically connected to the microprocessor, the memory having stored therein a plurality of reference eye closure patterns; and an alarm connected to the microprocessor for alerting the subject when the eye openness factors, compared to a reference eye closure pattern, are indicative of the microsleep event. - View Dependent Claims (25)
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26. A computer-implemented method of detecting a microsleep event in a subject, the method comprising:
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receiving a signal from an infra red source at one or more eyes of the subject; determining a plurality of eye openness factors by measuring a plurality of distances between an upper eyelid and a lower eyelid of at least one eye over a time period;
generating graphical representations of the eye openness factors; andtriggering an alarm to alert the subject when the eye openness factors, compared to a reference eye closure pattern, are indicative of the microsleep event.
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Specification