Edge-enhancement processing apparatus and method, and medium containing edge-enhancement processing program
US6392759B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1998 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An edge-enhancement processing apparatus which removes problems of the conventional edge enhancement processing, which requires checking by an operator's visual observation or a high-frequency band filter, thus complicating the construction. A computer main body 21, as the nucleus of edge enhancement processing, calculates an edge amount as change level while generating a vector based on the difference values of data between adjacent pixels, at step S110, then selects and integrates edge amounts of only pixels having large edge amounts at steps S120 and S130, and obtains the mean value at step S230, to obtain the sharpness level of the image while adding attention to the pixels having large image change levels. The computer main body 21 determines an edge enhancement level Eenhance based on the image sharpness level. Thus, the computer main body 21 automatically performs edge enhancement processing at an optimum enhancement level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.