Method of and apparatus for producing predominate and non-predominate color coded characters for optical character recognition
US5406640A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/224
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Color coding of characters both for optical character recognition by a machine and for viewing by a human is provided by coloring a character with a predominate color distinguishable by humans and a non-predominate color non-distracting to humans, but distinguishable by a color scanner. The advantage of the present invention is higher optical character recognition accuracy rates without the severe visual distraction to human readers of prior art color coded characters. A further technical advantage is that the invention can be practiced with conventional color printers and color scanners instead of the specialized apparatus of prior art color coded characters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.