Method and apparatus for recognizing document image by use of color information
US6865290B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 2001 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Apr 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/413
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of recognizing a document image including a plurality of areas is provided. The method includes the steps of inputting the document image as a digital image, specifying a background color of the document image, reducing the size of the document image if necessary, extracting a plurality of pixels located in areas other than a background area from the document image by use of the background color, creating a plurality of connected elements by combining the plurality of pixels, and classifying the plurality of connected elements into a plurality of fixed types of areas by using at least features of shapes of the plurality of connected elements to obtain an area-separated document image. Additionally, a feedback process is performed if necessary, by performing binary area separation to a binary image and comparing a result of the binary area separation and a result of color area separation, to create a binary image suitable for an OCR process and to obtain a result of area separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.