Method and system for estimating sharpness metrics based on local edge kurtosis
US6888564B2 · kind B2 · utility
13Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Nov 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method and system for evaluating the quality of video data without gaining access to the source data. The system is configured to estimate sharpness metrics by detecting edge pixels and enclosing them with 8×8 pixel blocks. For each block, the sharpness according to the Kurtosis of the DCT is computed. The final metric is the average sharpness of the blocks in the edge profile and includes a robust combination of spatial and frequency domain information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.