Light source modulation for iris size adjustment
First Claim
1. A method for performing iris authentication for a user comprising:
- capturing an initial image of an eye of the user, the eye including an inner circular boundary between a pupil region and an iris region, and an outer circular boundary between the iris region and a sclera region;
determining, from the initial image, a first size measurement indicative of a size of the inner circular boundary;
(a) modulating one or more visible light sources to output visible light toward the eye of the user, by increasing an intensity of the one or more visible light sources by an increment amount;
(b) capturing a subsequent image of the eye of the user during a period of pupillary response resulting from modulating the one or more visible light sources;
(c) determining, from the subsequent image, an updated value of the first size measurement indicative of the size of the inner circular boundary,wherein, for each increment in a serious of increments of the intensity of the one or more visible light sources, the steps of (a) modulating the one or more visible light sources, (b) capturing a subsequent image of the eye of the user, and (c) determining, from the subsequent image, the updated value of the first size measurement indicative of the size of the inner circular boundary, are repeated until a condition based on the first size measurement is satisfied;
based on the subsequent image of the eye for the increment during which the condition based on the first size measurement is satisfied, obtaining an iris data record of the user; and
comparing the iris data record of the user to one or more registered iris data records to authenticate the user,wherein the increment amount is determined based on an environmental reading from a light sensor.
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Accused Products
Abstract
Use of pupillary response to visible light for iris authentication is disclosed. One example involves (a) capturing an initial image of an eye including an inner circular boundary between a pupil region and an iris region and an outer circular boundary between the iris region and a sclera region, (b) determining a first size measurement indicative of the inner circular boundary, (c) responsive to at least the first size measurement, modulating one or more visible light sources to output visible light toward the eye of the user, (d) capturing a subsequent image of the eye of the user during a period of pupillary response, (e) obtaining an iris data record of the user, and (f) comparing the iris data record of the user to one or more registered iris data records to authenticate the user.
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Citations
24 Claims
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1. A method for performing iris authentication for a user comprising:
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capturing an initial image of an eye of the user, the eye including an inner circular boundary between a pupil region and an iris region, and an outer circular boundary between the iris region and a sclera region; determining, from the initial image, a first size measurement indicative of a size of the inner circular boundary; (a) modulating one or more visible light sources to output visible light toward the eye of the user, by increasing an intensity of the one or more visible light sources by an increment amount; (b) capturing a subsequent image of the eye of the user during a period of pupillary response resulting from modulating the one or more visible light sources; (c) determining, from the subsequent image, an updated value of the first size measurement indicative of the size of the inner circular boundary, wherein, for each increment in a serious of increments of the intensity of the one or more visible light sources, the steps of (a) modulating the one or more visible light sources, (b) capturing a subsequent image of the eye of the user, and (c) determining, from the subsequent image, the updated value of the first size measurement indicative of the size of the inner circular boundary, are repeated until a condition based on the first size measurement is satisfied; based on the subsequent image of the eye for the increment during which the condition based on the first size measurement is satisfied, obtaining an iris data record of the user; and comparing the iris data record of the user to one or more registered iris data records to authenticate the user, wherein the increment amount is determined based on an environmental reading from a light sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for performing iris authentication for a user comprising:
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one or more image sensors configured to capture an initial image of an eye of the user, the eye including an inner circular boundary between a pupil region and an iris region, and an outer circular boundary between the iris region and a sclera region; and one or more processing units configured to; determine, from the initial image, a first size measurement indicative of a size of the inner circular boundary; (a) modulate one or more visible light sources to output visible light toward the eye of the user, by increasing an intensity of the one or more visible light sources by an increment amount; (b) receive a subsequent image of the eye of the user captured during a period of pupillary response resulting from modulating the one or more visible light sources; (c) determine, from the subsequent image, an updated value of the first size measurement indicative of the size of the inner circular boundary, wherein, for each increment in a serious of increments of the intensity of the one or more visible light sources, the one or more processing units are configured to repeat the steps of (a) modulating the one or more visible light sources, (b) capturing a subsequent image of the eye of the user, and (c) determining, from the subsequent image, the updated value of the first size measurement indicative of the size of the inner circular boundary, until a condition based on the first size measurement is satisfied; obtain, based on the subsequent image of the eye for the increment during which the condition based on the first size measurement is satisfied, an iris data record of the user; and compare the iris data record of the user to one or more registered iris data records to authenticate the user, wherein the one or more processing units are configured to determine the increment amount based on an environmental reading from a light sensor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for performing iris authentication for a user comprising:
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means for capturing an initial image of an eye of the user, the eye including an inner circular boundary between a pupil region and an iris region, and an outer circular boundary between the iris region and a sclera region; means for determining, from the initial image, a first size measurement indicative of a size of the inner circular boundary; (a) means for modulating one or more visible light sources to output visible light toward the eye of the user, by increasing an intensity of the one or more visible light sources by an increment amount; (b) means for capturing a subsequent image of the eye of the user during a period of pupillary response resulting from modulating the one or more visible light sources; (c) means for determining, from the subsequent image, an updated value of the first size measurement indicative of the size of the inner circular boundary; means, for each increment in a serious of increments of the intensity of the one or more visible light sources, for repeatedly operating the means for (a) modulating the one or more visible light sources, (b) capturing a subsequent image of the eye of the user, and (c) determining, from the subsequent image, the updated value of the first size measurement indicative of the size of the inner circular boundary, until a condition based on the first size measurement is satisfied; means for, based on the subsequent image of the eye for the increment during which the condition based on the first size measurement is satisfied, obtaining an iris data record of the user; means for comparing the iris data record of the user to one or more registered iris data records, to authenticate the user; and means for determining the increment amount based on an environmental reading from a light sensor. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A non-transitory computer-readable medium storing instructions therein for execution by one or more processing units, comprising instructions to:
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capture an initial image of an eye of the user, the eye including an inner circular boundary between a pupil region and an iris region, and an outer circular boundary between the iris region and a sclera region; determine, from the initial image, a first size measurement indicative of a size of the inner circular boundary; (a) modulate one or more visible light sources to output visible light toward the eye of the user, by increasing an intensity of the one or more visible light sources by an increment amount; (b) capture a subsequent image of the eye of the user during a period of pupillary response resulting from modulation of the one or more visible light sources; (c) determine, from the subsequent image, an updated value of the first size measurement indicative of the size of the inner circular boundary, wherein, for each increment in a serious of increments of the intensity of the one or more visible light sources, the steps of (a) modulating the one or more visible light sources, (b) capturing a subsequent image of the eye of the user, and (c) determining, from the subsequent image, the updated value of the first size measurement indicative of the size of the inner circular boundary, are repeated until a condition based on the first size measurement is satisfied; based on the subsequent image of the eye for the increment during which the condition based on the first size measurement is satisfied, obtain an iris data record of the user; and compare the iris data record of the user to one or more registered iris data records, to authenticate the user, wherein the increment amount is determined based on an environmental reading from a light sensor. - View Dependent Claims (24)
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Specification