System and method for scaling combined video and computer generated imagery
US6424749B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1999 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Mar 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/403
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for format conversion for use with images containing mixed video and computer generated imagery. A first intermediate scaled image is generated using a first interpolator which has a relatively wide passband and a narrow transition band to the stop band. This interpolator retains high frequency components in the interpolated image but may introduce ringing distortion adjacent to strong edges. The first intermediate scaled image is then processed through an edge extractor which extracts strong edges but ignores any associated ringing distortion. The output signal of the edge detector is a scaled edge image. Next, a second intermediate scaled image is generated using a second interpolator which has a narrower passband and a more gradual transition band. This interpolator produces an image having reduced high frequency components relative to the original image. Then the scaled edge image is added to the second ma intermediate scaled image to produce a converted image having substantially the same high frequency components as the first intermediate scaled image but no ringing distortion components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.