METHOD AND DEVICE FOR PREVENTING FALSE ACCEPTANCE OF LATENT FINGER PRINT IMAGES
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Abstract
Disclosed is a method for detecting a latent fingerprint image provided to a biometric input device of a fingerprint based security system. First and second images of the fingerprint are captured during a time period interval Δt. At least one of the first and second images are analyzed to identify an extractable feature within a global reference frame, the extractable feature useable for authenticating an individual. The first and second images are compared one with the other to determine differences indicative of motion about the identified extractable feature within a local reference frame during the time period interval Δt. Absent motion about the identified extractable feature being detected, the fingerprint is registered as a latent fingerprint and cannot be used to authenticate the individual who is seeking authorization.
28 Citations
70 Claims
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1-18. -18. (canceled)
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19. A method for preventing false acceptance of latent biometric information, comprising:
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a) sensing first biometric information from a first portion of a biometric information source;
b) sensing second biometric information from a second portion of the biometric information source, each of the first and second portions including an overlapping same portion of the biometric information source, the first and second biometric information received at a different time one from the other;
c) analyzing the first biometric information and/or second biometric information to identify a feature within the overlapping same portion for determining a reference frame for use in characterizing the first biometric information and/or the second biometric information;
d) determining first data relating to the feature within the first biometric information and determining second data relating to the same feature within the second biometric information;
e) comparing the first and second data to detect a difference between the first and second biometric information; and
f) determining the biometric information source as a live biometric information source in dependence upon the detected difference, wherein the detected difference is indicative of relative motion of or about the feature within a local reference frame. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A contact imaging device capable of preventing false acceptance of latent biometric information, comprising:
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a biometric information input device capable of sensing first biometric information provided from a first portion of a biometric information source at a first time and of sensing second biometric information provided from a second portion of the biometric information source at a second time, each of the first and second portions including an overlapping same portion of the biometric information source; and
a processing device capable of analyzing the first biometric information and/or second biometric information to identify a feature within the overlapping same portion for determining a reference frame for use in characterizing the first biometric information and/or the second biometric information, determining first data relating to the feature within the first biometric information and determining second data relating to the same feature within the second biometric information, comparing the first and second data to detect a difference between the first and second biometric information, and determining the biometric information source as a live biometric information source in dependence upon the detected difference, wherein the detected difference is indicative of relative motion of or about the feature within a local reference frame. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A contact imaging device capable of preventing false acceptance of latent biometric information, comprising:
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means for sensing first biometric information from a first portion of a biometric information source and for sensing second biometric information from a second portion of the biometric information source, each of the first and second portions including an overlapping same portion of the biometric information source, the first and second biometric information received at a different time one from the other; and
processing means for analyzing the first biometric information and/or second biometric information to identify a feature within the overlapping same portion for determining a reference frame for use in characterizing the first biometric information and/or the second biometric information, for determining first data relating to the feature within the first biometric information and determining second data relating to the same feature within the second biometric information, for comparing the first and second data to detect a difference between the first and second biometric information, and for determining the biometric information source as a live biometric information source in dependence upon the detected difference, wherein the detected difference is indicative of relative motion of or about the feature within a local reference frame. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A method for preventing access by unauthorized individuals to buildings, rooms, devices, or information, comprising:
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a) sensing first biometric information from a first portion of a biometric information source of an individual;
b) sensing second biometric information from a second portion of the biometric information source of the individual, each of the first and second portions including an overlapping same portion of the biometric information source, the first and second biometric information received at a different time one from the other;
c) analyzing the first biometric information and/or second biometric information to identify a feature within the overlapping same portion for determining a reference frame for use in characterizing the first biometric information and/or the second biometric information;
d) determining first data relating to the feature within the first biometric information and determining second data relating to the same feature within the second biometric information;
e) comparing the first and second data to detect a difference between the first and second biometric information;
f) determining the biometric information source as a live biometric information source in dependence upon the detected difference, wherein the detected difference is indicative of relative motion of or about the feature within a local reference frame; and
g) determining that the individual is unauthorized if the biometric information source is not identified as a live biometric information source in step f). - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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61. A security access system capable of preventing access by unauthorized individuals to buildings, rooms, devices, or information, comprising:
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a biometric information input device capable of sensing first biometric information provided from a first portion of a biometric information source of an individual at a first time and of sensing second biometric information provided from a second portion of the biometric information source of the individual at a second time, each of the first and second portions including an overlapping same portion of the biometric information source; and
a processing device capable of analyzing the first biometric information and/or second biometric information to identify a feature within the overlapping same portion for determining a reference frame for use in characterizing the first biometric information and/or the second biometric information, determining first data relating to the feature within the first biometric information and determining second data relating to the same feature within the second biometric information, comparing the first and second data to detect a difference between the first and second biometric information, determining the biometric information source as a live biometric information source in dependence upon the detected difference, wherein the detected difference is indicative of relative motion of or about the feature within a local reference frame, and determining that the individual is unauthorized if the biometric information source is not identified as a live biometric information source. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70)
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Specification