Image analysis
US8094967B2 · kind B2 · utility
2Cited by
2References
36Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 2007 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Mar 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention concerns image analysis of video signals or data in order to detect prior, block-based processing, and to quantify block-related picture impairments. Adjacent samples of video data are high pass-filtered, rectified and auto-correlated to form an auto-correlation function. The auto-correlation function may be analysed to provide information regarding block size and other block artefact measures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.