Video key glow and border generator
US4698666A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1985 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Jul 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/2622
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is disclosed which provides for the placement of a border video signal around a selected object in a video image. A video image of the selected object is first inserted into a video image of a selected border video signal in a video mixing process by use of a key signal defining the selected object. The key signal is further processed to transform the step transitions associated therewith between the zero and full insert states into non-step transitions. The transformed key signal is thereafter used to control a subsequent mixing of the resulting image of the selected object inserted into the video image of the border video signal with a background image to produce a composite video image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.