Image-processing apparatus
US6978045B1 · kind B1 · utility
9Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1999 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Sep 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1844
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image processor on multi-level image data, an edge direction of a target pixel is discriminated from differences in density level between the target pixel and adjacent pixels thereof. A pixel is divided into a plurality of sub-pixels, and the image is formed in the unit of sub-pixels. The density level is set for each of the sub-pixels in the target pixel in accordance with the discrimination on the edge direction of the target pixel so that the center of gravity in density is changed in the target level. Then a character edge portion is reproduced more smoothly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.