Automatic detection and selection of a drop-out color using zone calibration in conjunction with optical character recognition of preprinted forms
US5014329A · kind A · utility
18Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1990 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Jul 24, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/143
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for separating text information from previously printed material on forms by automatically detecting and selecting the drop-out color based on sampling a color from a selected calibration zone or patch. Using a three-color electronic scanner, the filtering parameters are adjusted based on the detected color in the zone of the form being processed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.