Method and apparatus for secure document printing
US8405882B2 · kind B2 · utility
6Cited by
2References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2009 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Nov 13, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M3/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method for devising a pantograph. The method includes the steps of defining a message to be displayed on the pantograph, forming a background pixel format and a foreground pixel cluster pattern. The foreground cluster pattern is devised from the background pixel formation. Adjacent pixels in the background pattern are combined to form pixel clusters. The foreground pattern of pixel clusters is used to fill the characters of a pantograph message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.