Methods and systems for capturing biometric data

• US 8,548,206 B2
• Filed: 02/11/2011
• Issued: 10/01/2013
• Est. Priority Date: 01/20/2011
• Status: Active Grant

• Current Assignee: Corporation DAON Technology
• Original Assignee: Daon Holdings Limited
• Inventors: Sahin, Tevfik Burak, White, Conor Robert, Peirce, Michael, Sezille, Nicolas Jacques Jean
• Primary Examiner(s): Johns, Andrew W
• Application Number:
  US13/025,729
• Publication Number:
  US 20120188055A1
• Time in Patent Office: 963 Days
• Field of Search: 382/115, 382/117, 382/124, 382/126, 382/294, 356/71, 340/5.81, 340/5.82, 340/5.83
• US Class Current: 382/115
• CPC Class Codes: G06V 10/24 Aligning, centring, orientation detection or correction of the image
• CPC Class Codes: G06V 40/13 Sensors therefor
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G06V 40/166 using acquisition arrangements
• CPC Class Codes: G06V 40/172 Classification, e.g. identification
• CPC Class Codes: G06V 40/67 by interactive indications to the user
• CPC Class Codes: H04L 63/0861 using biometrical features, e.g. fingerprint, retina-scan cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46

Abstract

A method of capturing biometric data is provided that includes activating a security application in a device. The security application is activated by an operator of the device and is configured to cause the device to display an outline image. Moreover, the method includes displaying the outline image in a stationary position on a display of the device, positioning desired biometric data proximate the device such that the desired biometric data appears as a biometric image on the device display, and monitoring the outline and biometric images shown on the device display. Furthermore, the method includes positioning the device and the desired biometric data to better align the outline and biometric images when the outline and biometric images do not align and capturing the desired biometric data from an individual after approximately aligning the outline image with the biometric image.

Claims

1. A method of capturing biometric data comprising:

capturing desired biometric data from an individual with a device after approximately aligning an outline image with a desired biometric data image on the device;

generating an authentication gray scale image from the captured biometric data and aligning the authentication gray scale image with an enrollment gray scale image; and

verifying the identity of the individual.

2. A method of capturing biometric data in accordance with claim 1, said verifying operation comprising comparing biometric data of an authentication region of interest against biometric data of an enrollment region of interest, the biometric data of the authentication region of interest and of the enrollment region of interest being in a region common to both the authentication region of interest and the enrollment region of interest.

3. A method of capturing biometric data in accordance with claim 2, further comprising:

generating an enrollment mask from the enrollment region of interest, the enrollment mask including a first enrollment area of valid biometric data and a second enrollment area of invalid biometric data;

generating an authentication mask from the authentication region of interest, the authentication mask including a first authentication area of valid biometric data and a second authentication area of invalid biometric data; and

comparing the authentication mask against the enrollment mask to determine the common region.

4. A method of capturing biometric data in accordance with claim 1, further comprising:

extracting biometric feature data from the aligned authentication gray scale image and generating an authentication biometric template from the extracted biometric feature data;

generating an enrollment mask from an enrollment region of interest and an authentication mask from an authentication region of interest; and

comparing the aligned authentication and enrollment masks to determine a region common to both masks.

5. A method of capturing biometric data in accordance with claim 1, said capturing operation comprising:

capturing palm biometric data from a hand positioned freely in space with respect to the device, the device being a portable device; and

photographing the hand with the portable device.

6. A method of capturing biometric data in accordance with claim 1, said aligning operation comprising:

calculating a transformation;

applying the transformation against an authentication region of interest to align the authentication region of interest with an enrollment region of interest;

applying the transformation against the authentication mask to align the authentication mask with an enrollment mask; and

applying the transformation against the authentication gray scale image to align the authentication gray scale image with the enrollment gray scale image.

7. A computer system for capturing biometric data comprising:

an authentication system including an authentication database, said authentication system being configured to at least communicate with devices, store biometric data in said authentication data base, and generate outline images from biometric data captured from individuals; and

a device including at least a display, said device being configured to communicate with at least said authentication system,

display an outline image and an image of desired biometric data on said device display during authentication of an individual, and

capture biometric data from the individual when the image of the desired biometric data aligns approximately with the outline image on the device display, said authentication system being further configured to

generate an authentication gray scale image from the captured biometric data,

generate an enrollment gray scale image from biometric data captured during enrollment in said authentication system, and

align the authentication gray scale image with the enrollment gray scale image to determine a region of agreement.

8. A computer system for capturing biometric data in accordance with claim 7, said authentication system being further configured to conduct a biometric verification matching transaction with biometric feature data extracted from the aligned authentication gray scale image that is within the region of agreement.

9. A computer system for capturing biometric data in accordance with claim 7, wherein the desired biometric data is palm biometric data and the outline image is generated from palm biometric data captured during enrollment in said authentication system.

10. A computer system for capturing biometric data in accordance with claim 7, said device being one of a smart phone, a tablet computer, a television, a personal computer, a personal digital assistant, a camera, and a laptop computer.

11. A computer system for capturing biometric data in accordance with claim 7, said authentication system being further configured to generate the outline image for an individual by at least one of conducting statistical color analysis, clustering, and conducting edge detection with filters.

12. A computer system for capturing biometric data in accordance with claim 7, said device being configured to present outline images corresponding to different biometric modalities in succession on the display.

13. A computer program recorded on a non-transitory computer-readable recording medium included in an authentication computer system for enabling authentication of individuals, the computer program being comprised of instructions, which when read and executed by the authentication computer system, cause the authentication computer system to perform at least the following operations:

display an outline image of biometric data on a display screen;

display biometric data desired to be captured as a biometric image on the display screen;

capture the desired biometric data when the biometric image is within a tolerance of the outline image;

generate an authentication region of interest of the captured biometric data, and generating an authentication gray scale image and an authentication mask from the captured biometric data;

align the authentication gray scale image with an enrollment gray scale image generated during enrollment in an authentication computer system;

align the authentication mask with an enrollment mask;

compare the aligned authentication and enrollment masks to determine a region of agreement; and

conduct a biometric verification matching transaction with biometric feature data extracted from the aligned authentication gray scale image that is within the region of agreement.

14. A computer program in accordance with claim 13 further comprising instructions, which when read and executed by the authentication computer system, cause the authentication computer system to:

calculate a transformation;

apply the transformation against the authentication region of interest to align the authentication region of interest with the enrollment region of interest;

apply the transformation against the authentication mask to align the authentication mask with the enrollment mask; and

apply the transformation against the authentication gray scale image to align the authentication gray scale image with the enrollment gray scale image.

15. A computer program in accordance with claim 14 further comprising instructions, which when read and executed by the authentication computer system, cause the authentication computer system to:

rotate the authentication gray scale image through a series of angles, and scale the authentication gray scale image through a series of scale factors;

apply a patch area representing a copy of a portion of biometric data captured during enrollment in the authentication computer system, against the authentication gray scale image for each angle and scale factor combination; and

calculate a correlation score for each desired angle and scale factor combination.

16. A computer program in accordance with claim 15 further comprising instructions, which when read and executed by the authentication computer system, cause the authentication computer system to:

calculate a best correlation score from the correlation scores;

determine the angle and scale factor corresponding to the best correlation score, and the center point coordinates of the patch area corresponding to the best correlation score; and

calculate the transformation from the angle, scale factor, and center point coordinates that correspond to the best correlation score.

17. A computer program in accordance with claim 14 further comprising instructions, which when read and executed by the authentication computer system, cause the authentication computer system to:

generate the authentication gray scale image to include authentication areas of valid biometric data and non-authentication areas of invalid biometric data; and

generate the enrollment gray scale image to include enrollment areas of valid biometric data and non-enrollment areas of invalid biometric data.