Fingerprint recognition system
First Claim
Patent Images
1. A method of recognizing a fingerprint comprising:
- detecting the fingerprint;
digitizing the fingerprint;
subtracting a digitized background from the fingerprint, resulting in a difference print;
receiving a nonce from a digital system;
generating a hash including the differential print and the nonce;
sending the hash and the differential print to the digital system; and
processing the difference print.
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Abstract
A method and apparatus for fingerprint recognition is provided. A fingerprint is detected on a sensor. The fingerprint is digitized. A digitized background is subtracted from the fingerprint, resulting in a difference print. The difference print is matched with a database of fingerprint templates.
313 Citations
33 Claims
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1. A method of recognizing a fingerprint comprising:
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detecting the fingerprint; digitizing the fingerprint; subtracting a digitized background from the fingerprint, resulting in a difference print; receiving a nonce from a digital system; generating a hash including the differential print and the nonce; sending the hash and the differential print to the digital system; and processing the difference print. - View Dependent Claims (2, 3)
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4. A fingerprint detection system comprising:
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a computer system including a processor, the computer system generating a nonce for security; a universal serial bus coupled to the processor; a fingerprint sensor coupled to the universal serial bus, the fingerprint sensor for detecting a fingerprint, generating a hash including the fingerprint and the nonce, and securely transmitting the fingerprint and the nonce to the processor for analysis. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A sensor comprising:
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a sensing unit for obtaining a background image and a fingerprint image; a digitizer for digitizing the images; a subtractor for subtracting the background image from the fingerprint image, thereby generating a differential image; a security unit for receiving a nonce from the digital system and generating a hash including the differential print and the nonce; and a connection to a digital system for sending the hash and the differential print a device. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method comprising the steps of, in a sensor:
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capturing and digitizing a background print; capturing and digitizing a current fingerprint; subtracting the background print from the current fingerprint, thereby generating a differential print; receiving a nonce from the digital system; generating a hash including the differential print and the nonce; and sending the hash and the differential print to a digital system for matching. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification