Evaluating perforations on document images

Patent metadata

Field	Value
Publication number	US-12350952-B2
Application number	US-202318345143-A
Country	US
Kind code	B2
Filing date	Jun 30, 2023
Priority date	Dec 30, 2022
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The disclosure includes a system and method to obtain at least one image of a document under test, wherein valid instances of the document under test include at least one perforation-based three-dimensional security feature; obtain a first image snippet from the document under test, the first image snippet corresponding to at least a first portion of the perforation-based three-dimensional security feature present in the valid instances of the document; analyze the perforation-based three-dimensional security feature for one or more characteristics; and modify a likelihood that the document under test is accepted as valid, or rejected as invalid, based on a presence, or an absence, of the one or more characteristics.

First claim

What is claimed is:

1. A method comprising:
obtaining, using one or more processors, at least one image of a document, wherein valid instances of the document include at least one perforation-based three-dimensional security feature;
obtaining, using the one or more processors, a first image snippet from the document, the first image snippet corresponding to at least a first portion of the perforation-based three-dimensional security feature present in the valid instances of the document;
analyzing, using the one or more processors, a set of one or more characteristics of the perforation-based three-dimensional security feature; and
modifying, using one or more processors, a likelihood that the document is accepted as valid, or rejected as invalid, based on a presence, or an absence, of at least a first characteristic in the set of one or more characteristics.

2. The method of claim 1 , wherein the first characteristic is based on at least one of: a perforation size, a perforation shape, a perforation spacing, a perforation alignment, a reflection, a three-dimensional structure, a visible background through a perforation, a blur, and microprint consistency.

3. The method of claim 1 , wherein the first characteristic is based on a characteristic of valid instances of the perforation-based three-dimensional security feature automatically derived from valid document instances.

4. The method of claim 1 , wherein the first characteristic is based on a characteristic of valid instances of the perforation-based three-dimensional security feature obtained from a specification published by a document issuer or third party.

5. The method of claim 1 , wherein the perforation-based three-dimensional security feature represents a ghost image of a document holder, the method further comprising:
automatically connecting two or more perforations associated with the ghost image, wherein the two or more connected perforations at least partially represent one or more of an outline of a head in the ghost image and a facial feature in the ghost image; and
comparing the connected two or more perforations to a facial image of a document holder to determine whether a match exists, wherein the first characteristic is based on whether the match exists.

6. The method of claim 5 , wherein the two or more perforations are connected by applying an edge detection, and wherein comparing the connected two or more perforations includes a similarity match against the facial image of the document holder in the document.

7. The method of claim 1 , wherein the perforation-based three-dimensional security feature represents an alpha-numeric character string, the method further comprising:
automatically connecting two or more perforations associated with a first alpha-numeric character in the alpha-numeric character string; and
determining the first alpha-numeric character using optical character recognition.

8. The method of claim 7 , the method further comprising:
obtaining a document assembly object associated with the document; and
determining, from the document assembly object, whether a first perforation associated with a first position within the first alpha-numeric character present in the document image is consistent with one or more of a shape and a size of a perforation in a same position and character in a valid document instance, wherein the first characteristic is based on whether the first alpha-numeric character present in the document image is consistent with one or more of the shape and the size of a perforation in the same position and character in the valid document instance.

9. The method of claim 7 , the method further comprising:
obtaining a document assembly object associated with the document;
determining, from the document assembly object, a portion of the document that, in a valid document instance, repeats the alpha-numeric character string; and
determining whether a corresponding portion of the document includes the alpha-numeric character, wherein the first characteristic is based on whether the corresponding portion of the document includes the alpha-numeric character.

10. The method of claim 9 , wherein the portion of the document that, in a valid document instance, repeats the alpha-numeric character string includes one or more of a field and a machine-readable zone.

11. A system comprising:
a processor; and
a memory, the memory storing instructions that, when executed by the processor, cause the system to:
obtain at least one image of a document, wherein valid instances of the document include at least one perforation-based three-dimensional security feature;
obtain a first image snippet from the document, the first image snippet corresponding to at least a first portion of the perforation-based three-dimensional security feature present in the valid instances of the document;
analyze a set of one or more characteristics of the perforation-based three-dimensional security feature; and
modify a likelihood that the document is accepted as valid, or rejected as invalid, based on a presence, or an absence, of at least a first characteristic in the set of one or more characteristics.

12. The system of claim 11 , wherein first characteristic is based on at least one of: a perforation size, a perforation shape, a perforation spacing, a perforation alignment, a reflection, a three-dimensional structure, a visible background through a perforation, a blur, and microprint consistency.

13. The system of claim 11 , wherein the first characteristic is based on a characteristic of valid instances of the perforation-based three-dimensional security feature automatically derived from valid document instances.

14. The system of claim 11 , wherein the first characteristic is based on a characteristic of valid instances of the perforation-based three-dimensional security feature obtained from a specification published by a document issuer or trusted third party.

15. The system of claim 11 , wherein the perforation-based three-dimensional security feature represents a ghost image of a document holder, and comprising instructions that, when executed, further causing the system to:
automatically connect two or more perforations associated with the ghost image, wherein the two or more connected perforations at least partially represent one or more of an outline of a head in the ghost image and a facial feature in the ghost image; and
compare the connected two or more perforations to a facial image of a document holder to determine whether a match exists, wherein the first characteristic is based on whether the match exists.

16. The system of claim 15 , wherein the two or more perforations are connected by applying an edge detection, and wherein comparing the connected two or more perforations includes a similarity match against the facial image of the document holder in the document.

17. The system of claim 11 , wherein the perforation-based three-dimensional security feature represents an alpha-numeric character string, and comprising instructions that, when executed, further causing the system to:
automatically connecting two or more perforations associated with a first alpha-numeric character in the alpha-numeric character string; and
determining the first alpha-numeric character using optical character recognition.

18. The system of claim 17 , the system comprising instructions that, when executed, further causing the system to:
obtaining a document assembly object associated with the document; and
determining, from the document assembly object, whether

Assignees

• Jumio Corp

Inventors

• Wells Stuart
• Huff Daryl
• Balogh Attila
• Krump Thomas
• Singh Anshuman Vikram

Classifications

• G06T7/62

  of area, perimeter, diameter or volume · CPC title

• G06V30/22 Primary

  characterised by the type of writing · CPC title

• G06T1/20

  Processor architectures; Processor configuration, e.g. pipelining · CPC title

• G06T2207/30176

  Document · CPC title

• G06T7/13

  Edge detection · CPC title