Calculating a sharpness value
US9633445B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 2016 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Jan 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30168
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For calculating a sharpness value, a method filters an image with an edge extraction filter to generate filtered pixel values for each pixel of the image. The method further calculates a sharpness threshold as a function of the filtered pixel values. In addition, the method calculates a sharpness weight for each filtered pixel value as a function of the filtered pixel value and the sharpness threshold. The method calculates a weighted pixel value for each filtered pixel value as a function of the filtered pixel value and the corresponding sharpness weight for the filtered pixel value. The method further calculates a sharpness value for the image as a function of the weighted pixel values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.