VIGILANCE DETECTION METHOD AND APPARATUS
First Claim
Patent Images
1. A cognitive capacity detection apparatus comprising:
- an optical device configured to obtain a sequence of images of an eye of a subject and a facial region of said subject proximate said eye;
a processor in data communication with said optical device;
wherein said processor is adapted to analyze said sequence of images to determine a duration of a partially closed period when said eye is partially closed during an eye blink;
wherein said processor is adapted to calculate a rate of closure of said eye blink from said partially closed period;
wherein said processor is adapted to perform a calculation a rate of closure difference between said rate of closure and a rate of closure threshold value; and
an alert system in data communication with said processor and adapted to indicate when said rate of closure difference indicates an increase in mental fatigue.
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Abstract
An apparatus and method for calculating a real-time cognitive capacity score based on physical measurements of a user operating in a mentally fatiguing environment is provided. The cognitive capacity score is based primarily on measurements of various eye-blink variables, supported by other objective and subjective measures.
16 Citations
20 Claims
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1. A cognitive capacity detection apparatus comprising:
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an optical device configured to obtain a sequence of images of an eye of a subject and a facial region of said subject proximate said eye; a processor in data communication with said optical device; wherein said processor is adapted to analyze said sequence of images to determine a duration of a partially closed period when said eye is partially closed during an eye blink; wherein said processor is adapted to calculate a rate of closure of said eye blink from said partially closed period; wherein said processor is adapted to perform a calculation a rate of closure difference between said rate of closure and a rate of closure threshold value; and an alert system in data communication with said processor and adapted to indicate when said rate of closure difference indicates an increase in mental fatigue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vigilance prediction apparatus comprising:
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an imaging device configured to obtain a sequence of images of an eye of a subject and a facial region of said subject proximate said eye; a processor in data communication with said imaging device; wherein said processor is adapted to analyze said sequence of images to determine the duration of a partially closed period when said eye is partially closed during an eye blink; wherein said processor is adapted to calculate a rate of closure of said eye blink from said partially closed period; wherein said processor is adapted to perform a calculation a rate of closure difference between said rate of closure and a rate of closure threshold value; and an alert system in data communication with said processor and adapted to indicate when said rate of closure difference indicates that an increase in mental fatigue will occur within a set time period. - View Dependent Claims (14, 15)
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16. A method of determining onset of mental fatigue in a subject, the method comprising:
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acquiring a series of images with an optical device of an eye and a facial region of a subject, the facial region proximate said eye; measuring from said series of images a duration of a partially closed period when said eye is partially closed during an eye blink; calculating a rate of closure of said eye blink based on said partially closed period; calculating a rate of closure difference between said rate of closure and a rate of closure threshold value; and enunciating an alert when said rate of closure difference is indicative of an increase in mental fatigue. - View Dependent Claims (17, 19)
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18. A method of predicting an onset of mental fatigue in a subject, the method comprising:
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acquiring a series of images with an optical device of an eye and a facial region of a subject, the facial region proximate said eye; measuring from said series of images a duration of a partially closed period when said eye is partially closed during an eye blink; calculating a rate of closure of said eye blink based on said partially closed period; calculating a rate of closure difference between said rate of closure and a rate of closure threshold value; and enunciating an alert when said rate of closure difference indicates that an increase in mental fatigue will occur within a time period. - View Dependent Claims (20)
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Specification