Adaptive median filters for de-interlacing
US7129988B2 · kind B2 · utility
1Cited by
22References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 25, 2003 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Apr 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adaptive intra-field algorithm to de-interlace video data uses two line memories to implement a median filter that can use multiple data points on adjacent lines of display. In a median-mode, the filter outputs the median of the input data to create the value for a location on the intermediate line and can decrease image blurring. But if examination of the two adjacent pixels on two adjacent scan lines is small, as in the case of a vertical image line, the filter operates as a line average filter, to avoid creating image artifacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.