Methods and systems for generating a fingerprint for verification of a reference object

• US 9,965,700 B2
• Filed: 04/18/2017
• Issued: 05/08/2018
• Est. Priority Date: 08/12/2015
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Klimovski, Andrew, Szarski, Martin A.
• Primary Examiner(s): Johns, Andrew W
• Application Number:
  US15/490,014
• Publication Number:
  US 20170220901A1
• Time in Patent Office: 385 Days
• CPC Class Codes: B32B 2262/106 Carbon fibres, e.g. graphite fibres
• CPC Class Codes: B32B 5/024 Woven fabric
• CPC Class Codes: B32B 9/007 comprising carbon, e.g. graphite, composite carbon
• CPC Class Codes: G06F 18/22 Matching criteria, e.g. proximity measures
• CPC Class Codes: G06F 18/28 Determining representative reference patterns, e.g. by averaging or distorting; Generating dictionaries
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 2207/30164 Workpiece; Machine component
• CPC Class Codes: G06T 7/001 using an image reference approach
• CPC Class Codes: G08B 21/18 Status alarms G08B21/02 takes precedence
• CPC Class Codes: H04N 23/56 provided with illuminating means

Abstract

Disclosed herein are methods and systems for generating a fingerprint for verification of a reference object, such as a layer or ply during a composite laminate layup procedure. An exemplary method includes generating a plurality of images of the reference object from a plurality of angles, removing at least one lighting effect from at least one reference image to generate at least one processed image, generating a reference fingerprint for the reference object based on the at least one processed image, generating at least one candidate image of a candidate object, generating a candidate fingerprint for the candidate object based on the at least one candidate image, comparing the candidate fingerprint and the reference fingerprint to determine whether a correlation exists between the candidate fingerprint and the reference fingerprint, and generating an alert based on the comparison of the candidate fingerprint and the reference fingerprint.

Claims

1. A method for generating a fingerprint for verification of a reference object, the method comprising:

generating a plurality of images of the reference object from a plurality of angles;

removing at least one lighting effect from at least one reference image of the plurality of images to generate at least one processed image;

generating a reference fingerprint for the reference object based on the at least one processed image;

generating at least one candidate image of a candidate object;

generating a candidate fingerprint for the candidate object based on the at least one candidate image;

comparing the candidate fingerprint and the reference fingerprint to determine whether a correlation exists between the candidate fingerprint and the reference fingerprint; and

generating an alert based on the comparison of the candidate fingerprint and the reference fingerprint, wherein the alert is indicative that the correlation between the candidate fingerprint and the reference fingerprint exists.

2. The method of claim 1, wherein removing the at least one lighting effect from the at least one reference image comprises removing specularity.

3. The method of claim 1, wherein removing the at least one lighting effect from the at least one reference image comprises removing color distortion.

4. The method of claim 1, wherein generating a reference fingerprint for the reference object based on the at least one processed image comprises generating the reference fingerprint based on a surface of the reference object.

5. The method of claim 1, wherein generating the alert further comprises determining whether the reference object is a same object as the candidate object.

6. The method of claim 1, wherein generating a candidate fingerprint further comprises the step of generating the candidate fingerprint based on a surface of the candidate object.

7. The method of claim 6, wherein generating the alert comprises determining whether a surface of the reference object is similar to the surface of the candidate object.

8. The method of claim 1, wherein removing the at least one lighting effect further comprises:

comparing the plurality of images to each other;

generating a light-neutral image; and

storing the light-neutral image as the at least one processed image.

9. The method of claim 1, further comprising:

removing at least one lighting effect from the at least one candidate image;

creating the at least one candidate image that is processed; and

generating the candidate fingerprint for the candidate object based on the at least one candidate image that is processed.

10. A system comprising a detector and a signal processor for generating a fingerprint for verification of a reference object according to the method of claim 1.

11. A method for generating a fingerprint for verification of a reference object, the method comprising:

generating a plurality of images of the reference object from a plurality of angles;

removing at least one lighting effect from at least one reference image of the plurality of images to generate at least one processed image;

generating a reference fingerprint for the reference object based on the at least one processed image;

comparing a candidate fingerprint for a candidate object and the reference fingerprint to determine whether a correlation exists between the candidate fingerprint and the reference fingerprint; and

generating an alert based on the comparison of the candidate fingerprint and the reference fingerprint, wherein the alert is indicative that the correlation between the candidate fingerprint and the reference fingerprint exists.

12. The method of claim 11, wherein removing the at least one lighting effect from the at least one reference image comprising removing specularity.

13. The method of claim 11, wherein removing the at least one lighting effect from the at least one reference image comprising removing color distortion.

14. The method of claim 11, wherein generating a reference fingerprint for the reference object based on the at least one processed image comprises generating the reference fingerprint based on a surface of the reference object.

15. The method of claim 11, wherein generating the alert further comprises determining whether the reference object is a same object as the candidate object.

16. The method of claim 11, wherein removing the at least one lighting effect further comprises:

comparing the plurality of images to each other;

generating a light-neutral image; and

storing the light-neutral image as the at least one processed image.

17. The method of claim 11, further comprising:

removing at least one lighting effect from the at least one candidate image;

creating the at least one candidate image that is processed; and

generating the candidate fingerprint for the candidate object based on the at least one candidate image that is processed.

18. A method for generating a fingerprint for verification of a reference object, the method comprising:

generating a plurality of images of the reference object from a plurality of angles;

generating at least one processed image from at least one reference image of the plurality of images;

generating a reference fingerprint for the reference object based on the at least one processed image;

comparing a candidate fingerprint for a candidate object and the reference fingerprint to determine whether a correlation exists between the candidate fingerprint and the reference fingerprint; and

generating an alert based on the comparison of the candidate fingerprint and the reference fingerprint, wherein the alert is indicative that the correlation between the candidate fingerprint and the reference fingerprint exists.

19. The method of claim 18, wherein generating the at least one processed image from at least one reference image of the plurality of images comprises:

removing at least one lighting effect from the at least one reference image including specularity.

20. The method of claim 18, wherein generating the at least one processed image from at least one reference image of the plurality of images comprises:

removing at least one lighting effect from the at least one reference image including color distortion.