Method and apparatus for personal identification using palmprint and palm vein

• US 8,229,178 B2
• Filed: 08/18/2009
• Issued: 07/24/2012
• Est. Priority Date: 08/19/2008
• Status: Active Grant

• Current Assignee: Hong Kong Polytechnic University
• Original Assignee: Hong Kong Polytechnic University
• Inventors: Zhang, David, Lu, Guangming, Guo, Zhenhua, Luo, Nan
• Primary Examiner(s): Osman, Ramy M
• Application Number:
  US12/542,715
• Publication Number:
  US 20100045788A1
• Time in Patent Office: 1,071 Days
• Field of Search: 348/77, 348/78, 382/115, 382/107, 382/124
• US Class Current: 382/115
• CPC Class Codes: G06V 40/107 Static hand or arm
• CPC Class Codes: G06V 40/1347 Preprocessing; Feature extraction
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: G06V 40/45 Detection of the body part being alive

Abstract

A method of personal identification includes switching between visible and near infrared light, acquiring palmprint image and palm vein image from a person under the visible and the near infrared light, extracting sub-images from the palmprint image and the palm vein image based on a region of interest, extracting multiple features from the sub-images, and matching the extracted multiple features with stored information in a database to authenticate the person.

Claims

1. A method of personal identification, the method comprising:

switching between visible and near infrared light;

acquiring palmprint image and palm vein image from a person under the visible and the near infrared light;

extracting a palmprint sub-image from the palmprint image, and a palm vein sub-image from the palm vein image, the palmprint sub-image and the palm vein sub-image are based on a common region of interest;

extracting palmprint features from the palmprint sub-image, and extracting palm vein features from the palm vein sub-image using a matched filter technique; and

matching the extracted palmprint features and palm vein features with stored information in a database to authenticate the person.

2. The method according to claim 1, further comprises determining whether the palmprint image or the palm vein image is non-skin material based on image brightness information and texture information, and rejecting a person if the palmprint image or the palm vein image is determined as non-skin material.

3. The method according to claim 1, wherein the person is authenticated based on a result of a matching score.

4. The method according to claim 3, wherein the final matching score is a product of a palmprint matching score and a palm vein matching score.

5. A personal identification system comprising:

a light controller configured to control a lighting unit to switch between visible and near infrared light;

an image capture apparatus configured to acquire palmprint image and palm vein image from a person under the visible and the near infrared light; and

a computer configured to;

extract a palmprint sub-image from the palmprint image and a palm vein sub-image from the palm vein image, the palmprint sub-image and the palm vein sub-image are based on a common region of interest;

extract palmprint features from palmprint sub-image, and to extract palm vein features from the palm vein sub-image using a matched filter technique; and

match the extracted palmprint features and palm vein features with stored information in a database to authenticate the person.

6. The personal identification system according to claim 5, wherein the computer is configured to determine whether the palmprint image or the palm vein image is non-skin material based on image brightness information and texture information, and rejecting a person if the palmprint image or the palm vein image is determined as non-skin material.

7. The personal identification system according to claim 5, wherein the person is authenticated based on a result of a final matching score.

8. The personal identification system according to claim 7, wherein the final matching score is a product of a palmprint matching score and a palm vein matching score.