Embedded variable curved spiral patterns

Patent metadata

Field	Value
Publication number	US-11648792-B2
Application number	US-202016733073-A
Country	US
Kind code	B2
Filing date	Jan 2, 2020
Priority date	Jan 2, 2019
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

In general, the subject matter described in this specification relates to security credentials for documents, such as identification documents. One example is an identification document that includes a photographic image of an individual associated with the document, and a spiral pattern applied to a region of the identification document. The spiral pattern includes an elliptical spiral segmented into a plurality of arc segments, where wherein the arc segments of the spiral pattern encode identification data associated with the individual. Other implementations include corresponding processes, systems, apparatus, and computer programs related to generating and verifying identification documents with spiral patterns.

First claim

What is claimed is:

1. An identification document comprising:
a photographic image of an individual associated with the identification document; and
a spiral pattern applied to a region of the identification document, the spiral pattern comprising an elliptical spiral segmented into a plurality of arc segments, wherein the arc segments are portions of a continuous line converging on a center position of the spiral pattern;
wherein the plurality of arc segments of the spiral pattern encode identification data associated with the individual.

2. The identification document of claim 1 , wherein the plurality of arc segments of the spiral pattern encode a web address.

3. The identification document of claim 1 , characteristics of the spiral pattern encode authentication data, and the characteristics of the spiral pattern include a center position and an orientation.

4. The identification document of claim 1 , wherein the plurality of arc segments comprise:
a first arc segment having a first arc length; and
a second arc segment spaced from first arc segment, the second arc segment having a second arc length greater than the first arc length.

5. The identification document of claim 1 , wherein the spiral pattern is overlaid on a background of the identification document.

6. The identification document of claim 1 , wherein the identification document is a physical identification card.

7. The identification document of claim 6 , wherein the spiral pattern is printed on a layer of the identification document.

8. The identification document of claim 1 , wherein the spiral pattern is based on a polar to Cartesian coordinate conversion comprising the following relationship:
x ( t )= u ( t )*cos(ϕ)− v ( t )*sin(ϕ)+ Cx,

y ( t )= u ( t )*sin(ϕ)+ v ( t )*cos(ϕ)+ Cy,

wherein x(t) and y(t) are Cartesian coordinates representing dimensions on the document, and wherein u(t) and v(t) are polar coordinates representing of the spiral pattern.

9. The identification document of claim 1 , further comprising a segmented line pattern having a wave shape.

10. A method of verifying documents, the method comprising:
obtaining an image of a document;
identifying, within the image, a spiral pattern applied to a region of the document, wherein the spiral pattern comprises an elliptical spiral segmented into a plurality of arc segments, wherein the plurality of arc segments are portions of a continuous line converging on a center position of the spiral pattern;
determining, from the spiral pattern, spiral data that indicates characteristics of the spiral pattern;
determining, based on the spiral pattern and the spiral data, secure information of an individual associated with the document; and
verifying the document based on the secure information.

11. The method of claim 10 , wherein the spiral data includes a list of multiple spiral patterns identified on the document.

12. The method of claim 11 , wherein verifying the document comprises determining that the spiral data corresponds with expected spiral patterns from a spiral pattern repository.

13. The method of claim 11 , wherein determining the secure information comprises:
determining, based on the characteristics of the spiral pattern, arc lengths associated with at least a subset of the plurality of arc segments; and
determining the secure information from the arc lengths of the subset of arc segments.

14. The method of claim 13 , wherein determining the secure information from the arc lengths of the subset of arc segments comprises:
determining digital data represented by the plurality of arc lengths of the subset of arc segments; and
determining the secure information from the digital data.

15. The method of claim 13 , further comprising providing, for display to a user, the secure information.

16. The method of claim 13 , wherein the characteristics of the spiral pattern comprise a location of a center point of the spiral pattern on the document and wherein the center point of the spiral pattern indicates a direction for reading the secure information from the arc lengths.

17. The method of claim 10 , wherein the characteristics of the spiral pattern comprise a location of a center point of the spiral pattern on the document.

18. A computer-implemented method, comprising:
obtaining card type data and/or user data to be embedded in a document;
determining one or more line features to be implemented in the document;
determining a wave function associated with a graphic to be implemented in the document; and
controlling by control signals an embedding device to embed user data in the document based on the one or more line features and the wave function, wherein controlling by control signals comprises applying the wave function to a control movement of a laser while engraving the document, wherein the control signals comprise coordinate data for identifying locations of graphics and line segments with reference to an XY plane of the document.

19. The method of claim 18 , further comprising:
obtaining verified credential information associated with a holder of the document;
encoding the verified credential information within a pattern of line segments;
converting line segments in the pattern of line segments into arc segments by applying a set of spiral characteristics to provide a spiral pattern; and
applying the spiral pattern to a region of the document.

20. The method of claim 19 , wherein the spiral characteristics comprise a spiral controlled orientation (ϕ) and a center point (Cx,Cy), and wherein converting line segments in the pattern of line segments into arc segments comprises generating the spiral pattern based on a polar to Cartesian coordinate conversion comprising the following relationship:
x ( t )= u ( t )*cos(ϕ)− v ( t )*sin(ϕ)+ Cx,

y ( t )= u ( t )*sin(ϕ)+ v ( t )*cos(ϕ)+ Cy,

wherein x(t) and y(t) are Cartesian coordinates representing dimensions on the document, and wherein u(t) and v(t) are polar coordinates representing of the spiral pattern.

Assignees

• Idemia Identity & Security USA LLC

Inventors

• Hsu Rein-Lien
• O'Connor William M
• Tiguy Ashley S R
• Wu Yecheng
• Jones Robert L

Classifications

• G06V30/40

  Document-oriented image-based pattern recognition · CPC title

• G06F16/93

  Document management systems · CPC title

• B42D25/337

  Guilloche patterns · CPC title

• G06F16/9035

  Filtering based on additional data, e.g. user or group profiles · CPC title

• B42D25/21

  for multiple purposes · CPC title