Method of rendering a document secure
US10404886B2 · kind B2 · utility
0Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2015 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | May 8, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3235
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of integrating a mark in a document. A frame to be printed is selected. At least one color of the selected frame is selected. A color density for each selected color for the selected frame is determined. A digital code is selected for each selected color. After printing, the digital code includes the density of the color. and is integrated into the frame of the corresponding color. The frame including the digital code is printed. Preferably, the digital code is a digital anti-copy mark designed to form, following the printing step, a printed anti-copy mark with an error rate of more than five percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.