Electronic color dropout utilizing spatial context to enhance accuracy
US7020328B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2002 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | May 5, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/143
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for electronic color dropout utilizing spatial context to enhance accuracy comprises scanning a document to produce a color digital image. A thresholding apparatus is applied to the color digital image to produce a bitonal image. A region of the color digital image is selected corresponding to a feature of the bitonal image. An average color for the region is computed and compared to a predetermined dropout color. If the average color matches the predetermined dropout color, the region is erased from the bitonal image. Once it is determined that all features of the bitonal image have been examined, the process is complete. If all the features of the bitonal image have not been examined a region of the color digital image is selected corresponding to a feature of the bitonal image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.