METHOD AND DEVICE FOR THE DETECTION OF MICROSLEEP EVENTS
First Claim
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1. A method of detecting a microsleep event in a subject, 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.
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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.
35 Citations
28 Claims
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1. A method of detecting a microsleep event in a subject, 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. - 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, 24)
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25. 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; a microprocessor having electronically stored therein an electronically executable microsleep detection process, the microprocessor being connected to the sampler for receiving the sampled facial images, the images being electronically converted to graphical representations of eye openness factors; and a memory associated with the microprocessor, the memory having stored therein a plurality of reference eye closure patterns for electronically correlating the eye openness factors with the reference eye closure patterns. - View Dependent Claims (26)
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27. 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; 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 to the microsleep event.
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28. A method of correlating EEG and EOG microsleep patterns with eye closure patterns, the method comprising:
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measuring EEG and EOG microsleep patterns in a 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; and correlating changes in the eye openness factors with the EEG and EOG microsleep patterns.
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Specification