Two-dimensional codes hidden as scattered line segments
US12008423B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2022 |
| Grant date | Jun 11, 2024 |
| Priority date | — |
| Expiry date | Feb 16, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T1/005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods are disclosed for hiding a two-dimensional code such as a QR code within a visible layer of randomly scattered line segments. The scattering parameters comprise the length of successive line segments as well as their relative offsets. These parameters are stored in a key.The hidden 2d code is recovered with a computing device such as a smartphone carrying out the acquisition, perspective correction, and rectification of the visible layer of scattered line segments. This computing device synthesizes in its memory according to that same key a hidden layer of scattered line segments. The superposition of the acquired, perspectively corrected and rectified visible layer and of the hidden layer yields an image from which the hidden 2D code is revealed. The presented methods enable the secret transmission of information from the real world of documents and objects to databases located on computer networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.