Method and apparatus for a declarative representation of distortion correction for add-on graphics in broadcast video
US6850250B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Aug 28, 2001 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Oct 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method for distorting add-on graphics to be composited with a streaming video feed comprising, receiving a streaming video feed captured using a real camera, said streaming video feed including an image frame taken from a particular view point and a particular field of view, said real camera introducing image distortions into the image frame, measuring a plurality of camera instrumentation data corresponding to at least said view point, said field of view, and a distortion parameters corresponding to the image distortions of the image frame, creating a virtual camera, setting the virtual view point and the virtual field of view of the virtual camera using the plurality of camera instrumentation data, generating add-on graphics having a size and an insertion position within the image frame based on the virtual camera, creating a distortion grid, distorting the add-on graphics to match the image distortions of the image frame, and compositing the distorted add-on graphics with the image frame of the streaming video feed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.