Device and method for processing a signal with a subject moving against a colored background
US5923381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1996 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Nov 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device and method that overlays, onto a new colored background a subject clipped from a source video image having a subject moving against a first colored background. A clipping key KD is calculated which makes it possible to separate the color space representing the image into three regions, a first region defining a volume representing the first colored background, a second region defining a volume representing the subject, and a third region representing a region of transition between the first colored background and the subject. A video image VD representing the subject moving against the new colored background formed according to the formula: EQU VD=KD.times.subject video+(1-KD).times.background video, where "subject video" and background video respectively represent a video image containing the subject and the video image of the new colored background. The above described device and method are applicable for use in apparatuses such as, for example, video mixers or autonomous devices for clipping and overlaying video images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.