Font characteristic driven halftoning
US7224489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2001 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Feb 6, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1807
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Characteristics of text or text components or features are considered when selecting halftoning screens. For example, an italic slant angle of text is recognized and used to select or generate a compatible halftone screen oriented at the same angle. A screen frequency may be selected based on a thickness of a text component. Descriptive tags associated with text or text components facilitate screen selection. Tags are assigned based on font descriptions included in a document during authoring. Alternatively, tags are assigned based on the results of document segmentation and character recognition techniques. An image processing system operative to consider characteristics of text or text components when selecting halftone screens includes a text component characteristic recognizer, a halftone screen selector and a halftoner. Optionally a print engine is also included. In a xerographic environment the print engine includes a xerographic printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.