Adaptive overlay element placement in video
US6778224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2001 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Sep 27, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for placing overlay elements in images of a digital video so that desirable viewing areas of the images are not occluded by the overlay element, the method includes extracting frames from the video, each of the frames defining an image which may have one or more desirable viewing areas. For each frame, an area is selected in the image for placing an overlay element and the percentage the overlay element overlaps the desirable viewing areas is determined for the selected area. The overlay element is placed in the selected area if the percentage is below a maximum allowed predetermined percentage of overlapping. If it is not, one or more other areas in the image are selected and/or the size, shape, aspect ratio of the overlay element is changed until a position and/or size, shape, aspect ratio is found which minimizes occlusion of the desirable viewing areas in the image. Further, a device, such as a video receiver or video transmitter, for placing an overlay element in images of a digital video so that desirable viewing areas of the images are not occluded by the overlay element. In such a device, a frame extractor extracts frames from the video, each of the frames defining…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.