Images in interlaced formats: a novel method of scan conversion for video imaging systems
US6281933A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1997 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Dec 11, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S348/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A two-dimensional (2D) filter is disclosed that accomplishes flicker filtering with virtually no loss of image resolution. The 2D filter operates without adaption and only on the non-detail portions of the original image. The filter works first in the horizontal (x-axis) direction by separating the high-pass (detail, high-resolution) image elements from the low-pass (blurred, low-resolution) elements. A vertical (y-axis) flicker filter is applied to the low-pass elements and the result is summed with the high-pass elements. Thus, the detail elements are not subjected to flicker filtering and, as a result, remain well-defined while flicker is eliminated from the overall image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.