Method and apparatus for hand imaging device

• US 9,207,766 B1
• Filed: 01/25/2010
• Issued: 12/08/2015
• Est. Priority Date: 01/30/2009
• Status: Active Grant

• Current Assignee: Cytwiddly Incorporated
• Original Assignee: Cyberfone Technologies Incorporated
• Inventors: Arbour, Richard C. Jr., Fleming, Damon K.
• Primary Examiner(s): Vu, Kim
• Assistant Examiner(s): Hu, Fred
• Application Number:
  US12/657,592
• Time in Patent Office: 2,143 Days
• Field of Search: 382/115
• US Class Current: 1/1
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06T 2207/30196 Human being; Person
• CPC Class Codes: G06V 40/1312 direct reading, e.g. contactless acquisition
• CPC Class Codes: G06V 40/1335 Combining adjacent partial images (e.g. slices) to create a composite input or reference pattern; Tracking a sweeping finger movement
• CPC Class Codes: G06V 40/20 Movements or behaviour, e.g. gesture recognition recognition of facial expressions G06V40/16

Abstract

Method and apparatus for hand imaging having an enclosure having an opening into a concealed interior space or hand imaging area wherein the hand of a user is placed on a wrist pad to assure proper positioning. The charge-coupled device (CCD), its lens and/or its sensor(s) above the hand imaging area are arranged in a biangular manner to achieve a 3D representative image of the hand. Effective lighting is shown on the upper side of the of the enclosure which may be a light emitting diode (LED) or like light source. Also shown is a side angle mirror or a second CCD along with an indicator light (or ready light) for indicating that the device is ready for use. Also shown is means for connecting the device to a computer or like central data processing unit for providing a power supply and computer connectivity. This provides a method for generating hand images of a user to authenticate the identity of the user by generating a first series of confidential images of the hand of the user; wherein said plurality of first images comprises a plurality of first hand signs; storing the first images whereby a base record of the first images is compiled in a computer; generating a second series of confidential images of the hand of the user; wherein said plurality of second images comprises a plurality of second hand signs; and, comparing the plurality of second images to the base record whereby the identity of the user is authenticated.

Claims

1. A method of user identification by hand imaging, comprising the steps of:

a) placing the hand of a user within a space having at least a first sensor and at least a second sensor for imaging the hand of the user;

b) the user stationary posing the hand in at least one hand sign;

c) simultaneously imaging the hand of the user with at least said first sensor and said second sensor to produce, for each said hand sign stationary posed by the user, at least a first image of said hand sign and at least a second image of said hand sign;

d) for each said at least first image and each said at least second image, conducting a pixel contrast value analysis of that image to independently produce for that image a numerical pixel contrast value based on the specific hand sign of that image;

e) deriving a numerical digital signature capable of identifying the user to a statistical certainty having a series of said independently produced numerical pixel contrast values based on the sequence in which the user stationary posed the hand in at least one hand sign;

f) increasing accuracy and differentiation of said numerical digital signature by utilizing at least two said independently produced numerical pixel contrast values for each hand sign corresponding to said at least first image and said at least second image of said hand sign;

g) minimizing size requirements for records with said numerical pixel contrast values and said numerical digital signature;

h) forming a baseline record identifying the user from said numerical digital signature.

2. The method of claim 1 wherein said space comprises an enclosed space, wherein said step of stationary posing comprises the step of concealing the hand of the user within the enclosed space, wherein said first sensor comprises a CCD situated above the hand of the user, wherein said second sensor comprises a side angle mirror located along a side of the enclosed area for reflecting a side image of the hand, and further comprising a light source of LED'"'"'s located above the side mirror along a side of the enclosed area.

3. The method of claim 1 wherein said first sensor comprises a sensor selected from the group consisting of a sensor having a direct view of said hand of said user, a CCD, a lens, a mirror, a spectrum sensor, and a digital sensor, and wherein said second sensor comprises a sensor selected from the group consisting of a sensor having a reflected view of said hand of said user, a CCD, a lens, a mirror, a spectrum sensor, and a digital sensor.

4. The method of claim 1 wherein said step of user stationary posing the hand in at least one hand sign comprises the step of user stationary posing the hand in at least three hand signs.

5. The method of claim 1 wherein said step of imaging comprises the step of producing variations between said first image and said second image.

6. The method of claim 5 wherein said step of producing variations comprises a step selected from the group consisting of using different combinations of lighting, using different combinations of CCDs, using different combinations of spectrum sensors, using different lenses, using different focal lengths, using different CCD angles, using different sensor angles, and using biangular imaging.

7. The method of claim 5 wherein said step of deriving a singular digital signature comprises the step of using said produced variations between said first image and said second image.

8. The method of claim 1 wherein said step of forming a baseline record comprises the step of using an alphanumeric user identification code provided by said user.

9. The method of claim 1 further comprising the steps of identifying a subsequent user by the subsequent user engaging in said steps and authenticating the subsequent user by comparing the baseline record identifying the subsequent user with the baseline record identifying the user.

19. The method of claim 4 wherein said statistical certainty comprises no greater than a 1 in 10 million chance of obtaining a false positive from said numerical digital signature.

10. A hand imaging user identification apparatus comprising:

a) a user hand placement space configured to permit stationary posing of the user'"'"'s hand in at least one posed hand sign;

b) at least a first sensor and at least a second sensor configured to simultaneously produce, for each said hand sign stationary posed by the user, at least a first image of said hand sign and at least a second image of said hand sign;

c) a pixel value contrast analysis processor configured to independently produce, for each said at least first image and each said at least second image, a numerical pixel contrast value based on the specific hand sign of that image;

d) a numerical digital signature derivation processor configured to derive a numerical digital signature utilizing a series of said independently produced numerical pixel contrast values based on the sequence in which the user stationary posed the hand in at least one hand sign;

e) a numerical digital signature accuracy and differentiation processor configured to increase accuracy and differentiation of said numerical digital signature by utilizing at least two said independently produced numerical pixel contrast values for each hand sign corresponding to said at least first image and said at least second image of that hand sign;

f) a numerically-minimized record size memory configured to store records having numerically-minimized size requirements from said numerical pixel contrast values and said numerical digital signature;

g) computer storage configured to store a baseline record identifying said user formed from said numerical digital signature;

h) a user identification processor configured to utilize said numerical digital signature to identify the user to a statistical certainty.

11. The apparatus of claim 10 wherein said user hand placement space comprises an enclosed space configured to conceal the hand of the user, wherein said first sensor comprises a CCD situated above the hand of the user, wherein said second sensor comprises a side angle mirror located along a side of the enclosed area for reflecting a side image of the hand, and further comprising a light source of LEDs located above the side mirror along a side of the enclosed area.

12. The apparatus of claim 10 wherein said first sensor comprises a sensor selected from the group consisting of a sensor having a direct view of said hand of said user, a CCD, a lens, a mirror, a spectrum sensor, and a digital sensor, and wherein said second sensor comprises a sensor selected from the group consisting of a sensor having a reflected view of said hand of said user, a CCD, a lens, a mirror, a spectrum sensor, and a digital sensor.

13. The apparatus of claim 10 wherein said user hand placement space comprises a user hand placement space configured to permit stationary posing of the user'"'"'s hand in a sequence of at least three hand signs.

14. The apparatus of claim 10 wherein said first sensor and said second sensor comprise sensors configured to produce variations between said first image and said second image simultaneously produced for said hand sign.

15. The apparatus of claim 14 wherein said sensors configured to produce variations comprise sensors selected from the group consisting of sensors configured to use different combinations of lighting, sensors configured to use different combinations of CCDs, sensors configured to use different combinations of spectrum, sensors configured to use different lenses, sensors configured to use different focal lengths, CCDs configured to use different angles, sensors configured to use different angles, and sensors configured to use biangular imaging.

16. The apparatus of claim 14 wherein said numerical digital signature derivation processor comprises a processor configured to derive said numerical digital signature using said produced variations between said first image and said second image.

17. The apparatus of claim 10 wherein said computer storage configured to store a baseline record identifying said user further comprises an alphanumeric user identification code entry.

18. The apparatus of claim 10 wherein said apparatus comprises an apparatus configured for use by a subsequent user and further comprising a subsequent user authentication processor configured to compare a baseline record identifying the subsequent user with the baseline record identifying the user.

20. The apparatus of claim 13 wherein said statistical certainty comprises no greater than a 1 in 10 million chance of obtaining a false positive from said numerical digital signature.