Methods for encoding a source color illustration, for authenticating an illustration, and related computer media
US11042792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2018 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Jul 12, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/44
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to a method for encoding an illustration, which involves writing the illustration in greyscale or in color, encoding a message in the form of a two-dimensional barcode comprising a set of blocks, each block encoding a fragment of the message and comprising a set of (M) rows and (N) columns, and each block comprising a set of encoding sub-blocks, each subblock comprising a set of bits. It is essentially characterized in that the encoding step comprises defining or identifying a set of remarkable points on the source illustration, calculating a set of attributes according to certain remarkable points, selecting, among the set of attributes, at least one attribute making it possible to define a digital fingerprint, optionally compressed, optionally sign the digital fingerprint, record in the message one of at least one attribute, the digital fingerprint, optionally compressed, the signed digital fingerprint in compressed or non-compressed form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.