Method of improving image quality
US7602967B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2004 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Dec 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of improving image quality of a reproduced image, the method including converting red, green, and blue color data of a subject pixel into color data having brightness and chroma components; identifying the subject pixel as a background pixes, a picture pixel, or a text pixel according to the brightness and the chroma components; storing history information of the subject pixel, wherein the history information includes the number of continued background pixels or continued picture pixels before the subject pixel; detecting features of the subject pixel according to the history information; labeling the subject pixel to be included in one of a text area, a background area, and a picture area according to a state of a previously labeled adjacent pixel and the detected features of the subject pixel; and processing the subject pixel according to the area to which the subject pixel belongs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.