Fingerprint detection apparatus with partial fingerprint images

• US 6,097,035 A
• Filed: 02/22/1999
• Issued: 08/01/2000
• Est. Priority Date: 02/22/1999
• Status: Expired due to Term

• Current Assignee: Digital Persona Inc (Assa Abloy AB)
• Original Assignee: Digital Persona Inc (Assa Abloy AB)
• Inventors: Bjorn, Vance C., Belongie, Serge J.
• Primary Examiner(s): LE, QUE TAN
• Application Number:
  US09/255,037
• Time in Patent Office: 526 Days
• Field of Search: 250/556, 250/208.1, 250/559.4, 356/71, 382/124, 382/115, 382/126, 382/182, 382/181
• US Class Current: 250/556
• 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

Abstract

A fingerprint detection apparatus which includes a detection array having a detection surface, and a fingerprint platform configured to supply a plurality of partial fingerprint images of a fingerprint to the detection surface as the fingerprint is moved relative to the detection surface. The fingerprint detection apparatus also includes a processing device that is configured to construct a final fingerprint image from the plurality of partial fingerprint images supplied to the detection surface. A method of detecting a fingerprint image comprising the steps of: (1) supplying a plurality of partial fingerprint images of a fingerprint to a detection surface of a detection array as the fingerprint is moved relative to the detection surface; and (2) constructing a final fingerprint image from the plurality of partial fingerprint images.

Claims

1. A fingerprint detection apparatus comprising:

a detection array having a detection surface;

a fingerprint platform configured to supply a plurality of partial fingerprint images of a fingerprint to the detection surface as the fingerprint is moved relative to the detection surface; and

a processing device configured to construct a final fingerprint image from the plurality of partial fingerprint images supplied to the detection surface.

2. The apparatus of claim 1, wherein the fingerprint platform comprises a sheet prism.

3. The apparatus of claim 1, wherein the fingerprint platform is configured to move relative to the detection surface of the detection array, the processing device is configured to track the movement of the fingerprint platform relative to the detection surface and construct a fingerprint image from the plurality of partial fingerprint images supplied to the detection surface based upon the tracked movement of the fingerprint platform.

4. The apparatus of claim 1, wherein the fingerprint platform moves relative to the detection surface of the detection array.

5. The apparatus of claim 4, wherein the processing device tracks each position of the fingerprint platform as the fingerprint platform moves relative to the detection surface of the detection array.

6. The apparatus of claim 5, further including a memory device, each position of the fingerprint platform corresponding to a specific physical location within the memory device.

7. The apparatus of claim 6, wherein an individual partial fingerprint image is reflected onto the detection surface of the detection array at each position of the fingerprint platform.

8. The apparatus of claim 7, wherein the processing device writes each individual partial fingerprint image associated with each position of the fingerprint platform to the corresponding specific physical location within the memory device.

9. The apparatus of claim 8, wherein the processing device constructs a final fingerprint image from the individual partial fingerprint images written to the memory device.

10. The apparatus of claim 4, wherein a platform pattern is associated with the fingerprint platform, the platform pattern comprising a plurality of partial platform patterns, each partial fingerprint image of the plurality of partial fingerprint images being associated with an individual partial platform pattern.

11. The apparatus of claim 10, wherein the partial fingerprint images and the associated partial platform patterns associated with each individual partial fingerprint are reflected onto the detection surface as the fingerprint is moved relative to the detection surface.

12. The apparatus of claim 11, further including a memory device, each partial platform pattern associated with the fingerprint platform corresponding to a specific physical location within the memory device.

13. The apparatus of claim 12, wherein the processing device writes each individual partial fingerprint image associated with each partial platform pattern to the corresponding specific physical location within the memory device.

14. The apparatus of claim 13, wherein the processing device constructs a final fingerprint image from the individual partial fingerprint images written to the memory device.

15. A method of generating a fingerprint image, the method comprising the steps of:

supplying a plurality of partial fingerprint images of a fingerprint to a detection surface of a detection array as the fingerprint is moved relative to the detection surface; and

constructing a final fingerprint image from the plurality of partial fingerprint images.

16. The method of claim 15, wherein the step of constructing a final fingerprint image comprises:

tracking each position of a fingerprint platform relative to the detection surface; and

constructing a final fingerprint image from plurality of partial fingerprint images supplied to the detection surface based upon the tracked movement of the fingerprint platform.

17. The method of claim 15, wherein the step of supplying the plurality of partial fingerprint images comprises using a fingerprint platform to move the fingerprint relative to the detection surface of a detection array to produce the plurality of partial fingerprint images.

18. The method of claim 17, further including the step of tracking each position of the fingerprint platform as the fingerprint platform is moved relative to the detection surface of the detection array.

19. The method of claim 18, further including the step of mapping each position of the fingerprint platform to a corresponding specific physical location within a memory device.

20. The method of claim 19, further including the step of reflecting an individual partial fingerprint image onto the detection surface of the detection array at each position of the fingerprint platform.

21. The method of claim 20, further including the step of writing each individual partial fingerprint image associated with each mapped position of the fingerprint platform to the corresponding specific physical location within the memory device.

22. The method of claim 21, wherein the step of constructing a final fingerprint image constructs a final fingerprint image from the partial fingerprint images in the memory device.

23. The method of claim 17, further including the step of associating a platform pattern with the fingerprint platform, the platform pattern comprising a plurality of partial platform patterns, each partial fingerprint image of the plurality of partial fingerprint images being associated with an individual partial platform pattern.

24. The method of claim 23, further including the step of reflecting the partial fingerprint images and the associated partial platform patterns associated with each individual partial fingerprint onto the detection surface as the fingerprint is moved relative to the detection surface.

25. The method of claim 24, further including the step of mapping each partial platform pattern associated with the fingerprint platform to a corresponding to a specific physical location within a memory device.

26. The method of claim 25, further including the step of writing each individual partial fingerprint image associated with each partial platform pattern to the corresponding specific physical location within the memory device.

27. The method of claim 26, wherein the step of constructing a final fingerprint image constructs a final fingerprint image from the partial fingerprint images in the memory device.

28. A computer readable medium containing executable instructions which, when executed in a processing system, causes the processing system to perform the steps of a method for generating a fingerprint image, the method comprising:

supplying a plurality of partial fingerprint images of a fingerprint to a detection surface of a detection array as the fingerprint is moved relative to the detection surface; and

constructing a final fingerprint image from the plurality of partial fingerprint images.

29. The computer readable medium of claim 28, wherein the step of constructing a final fingerprint image comprises:

tracking each position of a fingerprint platform relative to the detection surface; and

constructing a final fingerprint image from plurality of partial fingerprint images supplied to the detection surface based upon the tracked movement of the fingerprint platform.

30. The computer readable medium of claim 28, wherein the step of supplying the plurality of partial fingerprint images comprises using a fingerprint platform to move the fingerprint relative to the detection surface of a detection array to produce the plurality of partial fingerprint images.

31. The computer readable medium of claim 30, wherein the method further includes the step of tracking each position of the fingerprint platform as the fingerprint platform is moved relative to the detection surface of the detection array.

32. The computer readable medium of claim 31, wherein the method further includes the step of mapping each position of the fingerprint platform to a corresponding specific physical location within a memory device.

33. The computer readable medium of claim 32, wherein the method further includes the step of reflecting an individual partial fingerprint image onto the detection surface of the detection array at each position of the fingerprint platform.

34. The computer readable medium of claim 33, wherein the method further includes the step of writing each individual partial fingerprint image associated with each mapped position of the fingerprint platform to the corresponding specific physical location within the memory device.

35. The computer readable medium of claim 34, wherein the step of constructing a final fingerprint image constructs a final fingerprint image from the partial fingerprint images in the memory device.

36. The computer readable medium of claim 30, wherein the method further includes the step of associating a platform pattern with the fingerprint platform, the platform pattern comprising a plurality of partial platform patterns, each partial fingerprint image of the plurality of partial fingerprint images being associated with an individual partial platform pattern.

37. The computer readable medium of claim 36, wherein the method further includes the step of reflecting the partial fingerprint images and the associated partial platform patterns associated with each individual partial fingerprint onto the detection surface as the fingerprint is moved relative to the detection surface.

38. The computer readable medium of claim 37, wherein the method further includes the step of mapping each partial platform pattern associated with the fingerprint platform to a corresponding to a specific physical location within a memory device.

39. The computer readable medium of claim 38, wherein the method further includes the step of writing each individual partial fingerprint image associated with each partial platform pattern to the corresponding specific physical location within the memory device.

40. The computer readable medium of claim 39, wherein the step of constructing a final fingerprint image constructs a final fingerprint image from the partial fingerprint images in the memory device.