Method and system for enhancing image sharpness based on local features of image
US8406559B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2011 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Jun 2, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20012
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for enhancing image sharpness includes a minimum unit, a maximum unit, a subtraction unit, a local mean unit, a sharpness calculation unit and a sharpness processing unit. The minimum unit receives pixels in a local area of an image to output a minimum luma value. The maximum unit receives the pixels in the local area of the image to output a maximum luma value. The subtraction unit subtracts the minimum luma value from the maximum luma value to generate a difference value. The local mean unit calculates an average of the luma values in the local area to generate a local mean value. The sharpness calculation unit calculates a sharpness factor for a pixel based on the difference value and an adjustable coefficient. The sharpness processing unit performs a sharpness processing on the pixel according to the sharpness factor and the local mean value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.