Method and system for background removal in electronically scanned images
US6081626A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1997 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Jan 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A process and system for separation of foreground information from background information in a document is described. In an initial stage, at least two images of a document are created, each with different filtering. One of the images is filtered so that only foreground information, or fragments thereof, remain. This image serves as the initial image for subsequent image restoration, while the remaining images represent reference images for the image restoration. In a second stage, the image restoration is carried out so that as much as possible of the foreground information which was lost by filtering from the initial image is restored again. By comparing information from the initial image with information from at least one reference image, the information remaining in the initial image is supplemented by foreground information from at least one reference image. Information to be supplemented from a reference image is selected with the aid of a suitable selection method such as for example, an adjacent point method. Individual areas of specific size are imposed around information points which possess foreground information content in the initial image, as well as in each of the re…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.