TEMPLATE SYNTHESIS FOR ECG/PPG BASED BIOMETRICS
First Claim
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1. A method of verifying identity of an individual by employing biometric data derived from a physical feature of the individual, the method comprising the steps of:
- acquiring a signal representing said biometric data;
normalizing the acquired signal using a value of at least one predetermined property of the signal as normalization parameter;
synthesizing a candidate signal using at least two signals selected from a group consisting of said normalized acquired signal and at least two different previously enrolled signals representing biometric data, which previously enrolled signals are normalized using said normalization parameter, by means of employing a function of a value of said predetermined property as a synthesis parameter; and
determining whether the synthesized candidate signal corresponds to any one of the remaining signals in said group, said normalized acquired signal either being used when synthesizing the candidate signal or constituting said remaining signal, wherein the identity of the individual is verified if there is correspondence between the synthesized candidate signal and said any one of the remaining signals.
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Abstract
The present invention relates to a method and a device for verifying identity of an individual by employing biometric data derived from a physical feature of the individual. A basic idea of the invention is that, rather than determining peak locations in cyclic signals such as ECG or PPG signals when using these signals as a representation of biometric data for verifying identity of an individual, shape or morphology of the signals is considered.
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13 Claims
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1. A method of verifying identity of an individual by employing biometric data derived from a physical feature of the individual, the method comprising the steps of:
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acquiring a signal representing said biometric data; normalizing the acquired signal using a value of at least one predetermined property of the signal as normalization parameter; synthesizing a candidate signal using at least two signals selected from a group consisting of said normalized acquired signal and at least two different previously enrolled signals representing biometric data, which previously enrolled signals are normalized using said normalization parameter, by means of employing a function of a value of said predetermined property as a synthesis parameter; and determining whether the synthesized candidate signal corresponds to any one of the remaining signals in said group, said normalized acquired signal either being used when synthesizing the candidate signal or constituting said remaining signal, wherein the identity of the individual is verified if there is correspondence between the synthesized candidate signal and said any one of the remaining signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 13)
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9. A device for verifying identity of an individual by employing biometric data derived from a physical feature of the individual, the device comprising:
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means (104) for acquiring a signal representing said biometric data; means (102) for normalizing the acquired signal using a value of at least one predetermined property of the signal as normalization parameter; means (103) for synthesizing a candidate signal using at least two signals selected from a group consisting of said normalized acquired signal and at least two different previously enrolled signals representing biometric data, which previously enrolled signals are normalized using said normalization parameter, by means of employing a function of a value of said predetermined property as a synthesis parameter; means (104) for storing the enrolled signals; and means (105) for determining whether the synthesized candidate signal corresponds to any one of the remaining signals in said group, said normalized acquired signal either being used when synthesizing the candidate signal or constituting said remaining signal, wherein the identity of the individual is verified if there is correspondence between the synthesized candidate signal and said any one of the remaining signals. - View Dependent Claims (10, 11, 12)
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Specification