Biometric apparatus and method using bio signals
First Claim
1. A biometric apparatus, comprising:
- an ADC (analog-to-digital converter) sampling an input bio signal to convert the sampled bio signal into a digital signal;
a periodic signal extractor for extracting a plurality of periodic signals from the digital signal;
a template storing portion registering a plurality of users and storing periodic signals for the respective registered users in a form of a template; and
a comparator computing similarity by calculating distances between the periodic signals outputted from the periodic signal extractor and the respective templates to select a template whose calculated distance is smallest and recognizing a user who corresponds to the selected template as a user who corresponds to the input bio signal.
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Abstract
A biometric apparatus and a method thereof using bio signals are provided. The apparatus includes an ADC, a periodic signal extractor, a template storing portion, a comparator. The ADC performs sampling of an input bio signal to convert the sampled bio signal into a digital signal. The periodic signal extractor extracts the periodic signals from the digital signal. The template storing portion registers a plurality of users and stores periodic signals for the respective registered users in a form of templates. The comparator computes similarity between the periodic signals outputted from the periodic signal extractor and the respective templates to select a template whose similarity is greatest and recognizes a user that corresponds to the selected template as a user who corresponds to the input bio signal.
38 Citations
26 Claims
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1. A biometric apparatus, comprising:
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an ADC (analog-to-digital converter) sampling an input bio signal to convert the sampled bio signal into a digital signal; a periodic signal extractor for extracting a plurality of periodic signals from the digital signal; a template storing portion registering a plurality of users and storing periodic signals for the respective registered users in a form of a template; and a comparator computing similarity by calculating distances between the periodic signals outputted from the periodic signal extractor and the respective templates to select a template whose calculated distance is smallest and recognizing a user who corresponds to the selected template as a user who corresponds to the input bio signal. - View Dependent Claims (2, 3, 4)
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5. A biometric apparatus, comprising:
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an ADC (analog-to-digital converter) sampling an input bio signal to convert the sampled bio signal into a digital signal; a periodic signal extractor for extracting a plurality of periodic signals from the digital signal; a periodic signal analyzer expanding the period signals to Fourier series to obtain Fourier coefficients for the periodic signals; a template storing portion registering a plurality of users and storing Fourier coefficients of periodic signals for the respective registered users in form of templates; and a comparator computing similarity by calculating distances between values outputted from the periodic signal analyzer and the respective templates to select a template whose calculated distance is smallest and recognizing a user who corresponds to the selected template as a user who corresponds to the input bio signal. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A biometric method, comprising:
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sampling an input bio signal to convert the sampled bio signal into a digital signal; extracting a plurality of periodic signals from the digital signal; calculating, using at least one processing device, a similarity by calculating distances between the extracted periodic signals and template from a template storing portion to which a plurality of users are registered and periodic signal for the respective registered users as stored as the templates; and selecting a template whose calculated distance is smallest and recognizing a user who corresponds to the selected template as a user who corresponds to the input bio signal. - View Dependent Claims (17, 18, 19, 20)
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21. A biometric method, comprising:
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sampling an input bio signal to convert the sampled bio signal into a digital signal; extracting a plurality of periodic signals from the digital signal; calculating, using at least one processing device, a similarity between the extracted periodic signals and template from a template storing portion to which a plurality of users are registered and periodic signal for the respective registered users as stored as the templates; and selecting a template whose similarity is greatest and recognizing a user who corresponds to the selected template as a user who corresponds to the input bio signal wherein the similarity is computed as distances between the periodic signals and the respective templates, as given by the following equation; where, i;
a number of the registered users, n;
a number of the periodic signals,fi ;
sample value of i-th template, fn;
sample value of n-th periodic signal.- View Dependent Claims (22)
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23. A biometric method, comprising:
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sampling an input bio signal to convert the sampled bio signal into a digital signal; extracting a plurality of periodic signals from the digital signal; calculating, using at least one processing device, a similarity between the extracted periodic signals and template from a template storing portion to which a plurality of users are registered and periodic signal for the respective registered users as stored as the templates; and selecting a template whose similarity is greatest and recognizing a user who corresponds to the selected template as a user who corresponds to the input bio signal, wherein the extracting of the plurality of periodic signals further comprises obtaining the Fourier coefficients for the plurality of periodic signals, respectively, and the template storing portion stores corresponding Fourier coefficients for each registered user in a form of the templates, and a Fourier transform is applied to the Fourier coefficients to obtain Fourier coefficient spectrums, wherein the template storing portion stores corresponding Fourier coefficient spectrums for each registered user in a form of the templates. - View Dependent Claims (24, 25)
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26. A computer-readable recording medium for recording a program executing a recognition method, comprising:
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detecting a bio signal containing periodic signals from a user and sampling the bio signal to convert the sampled signal into a digital signal; extracting the periodic signals from the digital signal; reading templates from a template storing portion in which a plurality of users are registered and storing periodic signals for the respective registered users in a form of templates and computing similarity by calculating distances between the templates and the periodic signals of the user, respectively; and recognizing a user that corresponds to a template whose calculated distance is smallest, as the user.
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Specification