Dynamic optimization of light source power
First Claim
1. An imaging device for power optimization of light sources of the imaging device, the imaging device comprising:
- a camera to generate a captured image of a subject;
a processor; and
a memory having stored therein a plurality of instructions that, when executed by the processor, cause the processor to;
analyze the captured image to (i) determine a location of an eye of the subject in the captured image relative to the imaging device, (ii) determine an iris-pupil contrast between the iris and the pupil of the subject'"'"'s eye in the captured image, and (iii) determine a glint intensity of one or more glints present on the subject'"'"'s eye in the captured image;
determine, for each light source of a plurality of light sources of the imaging device, an illumination efficiency based on (i) a distance between the camera and the subject'"'"'s eye, (ii) a distance between the corresponding light source and the subject'"'"'s eye, (iii) an incidence angle of the corresponding light source relative to the subject'"'"'s eye, and (iv) a power profile of the corresponding light source; and
determine an amount of power to supply to each light source to maintain the iris-pupil contrast at a contrast value not less than the predefined contrast value comprises to maintain an inequality,
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Accused Products
Abstract
Technologies for power optimization of light sources include an imaging device to generate a captured image of a subject. The imaging device analyzes the captured image to determine, in the captured image, a location of the subject'"'"'s eye relative to the imaging device, an iris-pupil contrast of the subject'"'"'s eye, and a glint intensity of glints present on the subject'"'"'s eye. The imaging device determines, for each of a plurality of light sources, an illumination efficiency based on a distance between the camera and the subject'"'"'s eye, a distance between the light source and the subject'"'"'s eye, an incidence angle of the light source relative to the subject'"'"'s eye, and a power profile of the light source. The imaging device determines an amount of power to supply to each light source to reduce a total cumulative power supplied to the light sources based on one or more power constraints.
14 Citations
22 Claims
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1. An imaging device for power optimization of light sources of the imaging device, the imaging device comprising:
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a camera to generate a captured image of a subject; a processor; and a memory having stored therein a plurality of instructions that, when executed by the processor, cause the processor to; analyze the captured image to (i) determine a location of an eye of the subject in the captured image relative to the imaging device, (ii) determine an iris-pupil contrast between the iris and the pupil of the subject'"'"'s eye in the captured image, and (iii) determine a glint intensity of one or more glints present on the subject'"'"'s eye in the captured image; determine, for each light source of a plurality of light sources of the imaging device, an illumination efficiency based on (i) a distance between the camera and the subject'"'"'s eye, (ii) a distance between the corresponding light source and the subject'"'"'s eye, (iii) an incidence angle of the corresponding light source relative to the subject'"'"'s eye, and (iv) a power profile of the corresponding light source; and determine an amount of power to supply to each light source to maintain the iris-pupil contrast at a contrast value not less than the predefined contrast value comprises to maintain an inequality, - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. One or more non-transitory machine-readable storage media comprising a plurality of instructions stored thereon that, in response to execution, cause a computing device to:
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generate a captured image of a subject; analyze the captured image to (i) determine a location of an eye of the subject in the captured image relative to the computing device, (ii) determine an iris-pupil contrast between the iris and the pupil of the subject'"'"'s eye in the captured image, and (iii) determine a glint intensity of one or more glints present on the subject'"'"'s eye in the captured image; determine, for each light source of a plurality of light sources of the computing device, an illumination efficiency based on (i) a distance between the camera and the subject'"'"'s eye, (ii) a distance between the corresponding light source and the subject'"'"'s eye, (iii) an incidence angle of the corresponding light source relative to the subject'"'"'s eye, and (iv) a power profile of the corresponding light source; and determine an amount of power to supply to each light source to maintain the iris-pupil contrast at a contrast value not less than a predefined contrast value by maintaining an inequality, - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for power optimization of light sources of an imaging device, the method comprising:
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generating a captured image of a subject; analyzing, by the imaging device, the captured image to (i) determine a location of an eye of the subject in the captured image relative to the imaging device, (ii) determine an iris-pupil contrast between the iris and the pupil of the subject'"'"'s eye in the captured image, and (iii) determine a glint intensity of one or more glints present on the subject'"'"'s eye in the captured image; determining, by the imaging device and for each light source of a plurality of light sources of the imaging device, an illumination efficiency based on (i) a distance between the camera and the subject'"'"'s eye, (ii) a distance between the corresponding light source and the subject'"'"'s eye, (iii) an incidence angle of the corresponding light source relative to the subject'"'"'s eye, and (iv) a power profile of the corresponding light source; and determining, by the imaging device, an amount of power to supply to each light source to maintain the iris-pupil contrast at a contrast value not less than a predefined contrast value by maintaining an inequality, - View Dependent Claims (21, 22)
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Specification