Biometrics method based on a thermal image of a finger

• US 7,519,205 B2
• Filed: 02/01/2008
• Issued: 04/14/2009
• Est. Priority Date: 02/09/2007
• Status: Active Grant

• Current Assignee: Egis Technology Inc.
• Original Assignee: Egis Technology Inc.
• Inventors: Chou, Bruce C. S.
• Primary Examiner(s): Chawan; Sheela C
• Application Number:
  US12/068,068
• Publication Number:
  US 20080199058A1
• Time in Patent Office: 438 Days
• Field of Search: 382/124, 382/115, 382/125, 382/127, 382/116, 382/312, 382/190, 382/218, 382/278, 382/126, 382/100, 382/117, 382/191, 219/543, 219/522, 219/201, 713/186, 713/182, 235/382, 235/380, 250/556, 250/208.1, 250/338.4, 340/5.83, 340/5.53, 257/522, 902/3, 356/71, 356/39, 356/41, 396/15, 600/310, 600/322, 600/323, 600/326, 600/473, 600/476
• US Class Current: 382/124
• CPC Class Codes: G06V 40/13 Sensors therefor
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: G06V 40/145 Sensors therefor

Abstract

A biometrics method based on a thermal image of a finger includes the steps of: acquiring the thermal image of the finger; and extracting a finger-print image or a finger-vein image from the thermal image and thus verifying a user'"'"'s identity according to the finger-print image or the finger-vein image.

Claims

1. A biometrics method, comprising the steps of:

acquiring a thermal image of a finger by a sensing member device;

extracting one or both of a finger-print image and a finger-vein image from the thermal image;

comparing the finger-print image with a finger-print template to obtain a first compared result;

comparing the finger-vein image with a finger-vein template to obtain a second compared result; and

verifying a user'"'"'s identity according to one or both of the first compared result and the second compared result, wherein;

the step of comparing the finger-print image with the finger-print template comprises;

extracting a plurality of first minutia points from the finger-print image and comparing the first minutia points with the finger-print template; and

the step of comparing the finger-vein image with the finger-vein template comprises;

extracting a plurality of second minutia points from the finger-vein image and comparing the second minutia points with the finger-vein template.

2. A biometrics method, comprising the steps of:

acquiring a thermal image of a finger by a sensing member device;

extracting both of a finger-print image and a finger-vein image from the thermal image;

comparing the finger-print image with a finger-print template to obtain a first compared result;

comparing the finger-vein image with a finger-vein template to obtain a second compared result; and

verifying a user'"'"'s identity according to both of the first compared result and the second compared result.

3. A biometrics method, comprising the steps of:

acquiring a thermal image of a finger by a sensing member device;

extracting one or both of a finger-print image and a finger-vein image from the thermal image;

extracting a plurality of first minutia points from the finger-print image;

extracting a plurality of second minutia points from the finger-vein image; and

respectively storing the first minutia points and the second minutia points to a storage unit to serve as a finger-print template and a finger-vein template.

4. A biometrics method, comprising the steps of:

acquiring a thermal image of a finger by a sensing member device;

extracting one or both of a finger-print image and a finger-vein image from the thermal image;

extracting a plurality of first minutia points from the finger-print image;

extracting a plurality of second minutia points from the finger-vein image; and

respectively storing the first minutia points and the second minutia points to a storage unit to serve as a finger-print template and a finger-vein template.

5. The method according to claim 4, wherein both of the finger-print image and the finger-vein image are extracted from the thermal image.