Method and system for detecting operator alertness
First Claim
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1. A method for detecting operator alertness of an operator of a vehicle or machine, the method comprising steps of:
- determining whether at least one eye of the operator is visible;
determining whether the operator is generally facing forward with respect to the vehicle;
and responsive to determining that at least one eye of the operator is not visible or that the operator is not facing forward, applying at least one of position analysis and motion analysis to a three dimensional representation of the operator to determine alertness of the operator, wherein the applying further comprises;
collecting reference position data associated with the operator, or a portion thereof, when the operator is in an alert state;
determining observed position data of one or more points of a three dimensional representation of the operator during a time interval, wherein the three dimensional representation of the operator is established via stereo vision processing; and
sending an alert signal to alert the operator if a detected angular shift of one or more points of the representation exceed a displacement threshold.
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Abstract
A method and system for detecting operator alertness of an operator of a vehicle or machine comprises an image processor and an analyzer. The image processor determines whether at least one eye of an operator is visible and determines whether the operator is generally facing forward with respect to the vehicle. The analyzer applies at least one of position analysis and motion analysis to a three dimensional representation of an operator to determine alertness of the operator if at least one eye of operator is not visible or If the operator is generally facing forward.
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Citations
18 Claims
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1. A method for detecting operator alertness of an operator of a vehicle or machine, the method comprising steps of:
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determining whether at least one eye of the operator is visible; determining whether the operator is generally facing forward with respect to the vehicle; and responsive to determining that at least one eye of the operator is not visible or that the operator is not facing forward, applying at least one of position analysis and motion analysis to a three dimensional representation of the operator to determine alertness of the operator, wherein the applying further comprises; collecting reference position data associated with the operator, or a portion thereof, when the operator is in an alert state; determining observed position data of one or more points of a three dimensional representation of the operator during a time interval, wherein the three dimensional representation of the operator is established via stereo vision processing; and sending an alert signal to alert the operator if a detected angular shift of one or more points of the representation exceed a displacement threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for detecting operator alertness of an operator of a vehicle or machine, the system comprising:
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an image processor for determining whether at least one eye of the operator is visible and for determining whether the operator is generally facing forward with respect to the vehicle; and
an analyzer for applying, responsive to determining that at least one eye of the operator is not visible or that the operator is not facing forward, at least one of position analysis and motion analysis to a three dimensional representation of the operator to determine alertness of the operator if at least one eye of operator is not visible or if the operator is generally facing forward, wherein the applying further comprises;
an image collection system for collecting reference position data associated with the operator, or portion thereof, when the operator is in an alert state;an object position estimator for determining observed position data of one or more points of a three dimensional representation of the operator during a time interval; a three dimensional image former for establishing the three dimensional representation of the operator via stereo vision processing; and
the analyzer for sending an alert signal to alert the operator if a detected angular shift of one or more points of the representation exceed a displacement threshold. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification