Method of palm print identification

• US 20040264742A1
• Filed: 06/10/2004
• Published: 12/30/2004
• Est. Priority Date: 09/25/2002
• Status: Active Grant

• Current Assignee: Hong Kong Polytechnic University
• Original Assignee: Hong Kong Polytechnic University
• Inventors: Lu, Guangming, You, Jia Jane, Kong, Wai Kin Adams, Wu, Xiangqian, Zhang, Dapeng David
• Granted Patent: US 7,496,214 B2
• Time in Patent Office: Days
• US Class Current: 382/115
• CPC Class Codes: G06V 40/1347 Preprocessing; Feature extraction

Abstract

A method of biometrics identification includes obtaining an image including a portion of a hand of an individual, analyzing the image to find one or more feature parameters defining different characteristics of the hand, and comparing the feature parameters with reference information in a database. The features parameters including a geometrical features parameter, a palm line features parameter or a palm texture features parameter.

Claims

1. A method of biometrics identification including:

obtaining an image including a portion of a hand of an individual,

analyzing the image to find two or more feature parameters defining different characteristics of the hand, said parameters including a geometrical features parameter, a palm line features parameter or a palm texture features parameter.

comparing the two or more feature parameters with reference information in a database.

2. The method of claim 1 wherein the geometrical features parameter comprises a relationship between two or more points on the image of the hand.

3. The method of claim 1 wherein the geometrical features parameter is a line intersecting two or more of a point between the first finger and middle finger, a point between the third finger and little finger, and a point defining the intersection of a palm line with a boundary of the hand.

4. The method of claim 1 wherein the geometrical features parameter is a line intersecting two or more of a point between the first finger and middle finger, a point between the third finger and little finger, and a point defining the intersection of a hear line or life line with a boundary of the hand.

5. The method of claim 1 wherein the geometrical features parameter includes two lines intersecting at least three points on the image of the hand, and an angle between the two lines.

6. The method of claim 1 wherein finding the palm line features parameter or palm texture features parameter includes extracting a repeatable sub-image from the image.

7. The method of claim 1 wherein finding the palm line features parameter includes finding the first-order and second-order derivatives of the sub-image in two or more directions to identify lines in the image, and calculating a value for total strength for the lines.

8. The method of claim 1 wherein finding the palm texture features parameter includes calculating a total texture energy for the image.

9. The method of claim 1 wherein finding the palm texture features parameter includes calculating a total texture energy for the image using an equation of the form