Method and device for calculating blur in video images
US8823873B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2009 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Nov 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Blur is one of the most important features related to image quality. Accurately estimating the blur level of an image is a great help to accurately evaluate its quality. A method for calculating blur of video images comprises calculating a horizontal blur value, and determining characteristic parameters of the video images, including at last progressive/interlaced and spatial resolution level. If the video images are progressive, also a vertical blur value is calculated, and combined with the horizontal blur value. The next step is normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.