Method for authenticating an illustration
US11055589B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2017 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Dec 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/2033
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to a method for authenticating an illustration, comprising—encoding a message in the form of a two-dimensional barcode comprising blocks, each block coding a fragment of said message and comprising a set of coding sub-blocks, each sub-block comprising a set of binary elements. It is essentially characterised in that the encoding comprises prior steps consisting in:—defining or identifying a set of noteworthy points in the illustration,—calculating a set of attributes depending on certain at least of the noteworthy points,—selecting, among the calculated attributes, at least one attribute allowing a digital fingerprint to be defined—optionally compressing said digital fingerprint,—optionally signing said digital fingerprint by means of a cryptographic signature, and—recording in the message one among:—a set of at least one attribute,—the digital fingerprint,—the compressed digital fingerprint, and—the signed and optionally compressed digital fingerprint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.