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US 6,125,192 AGranted
Fingerprint recognition system
AssigneeDigital Persona, Inc.
InventorsVance C. Bjorn, Serge J. Belongie
Life of this patent
Estimating the term…
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.
Claims33
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.
5 more elements
A fingerprint detection system comprising:
- 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.
A sensor comprising:
- 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.
3 more elements
A method comprising the steps of, in a sensor:
- 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.
4 more elements
Dependencies are inferred from the claim text.