System and method for automatic calculation of scene geometry in crowded video scenes
US9576204B2 · kind B2 · utility
4Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2015 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Apr 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/53
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system or method for automatic calculation of scene geometry may include receiving, by a processor, a video stream including a plurality of video frames. A video frame may be divided into blocks, and a vertical vanishing point of the video stream may be determined based on a dominant orientation of detected edges in the blocks. A horizon and scale of the video stream may be estimated based on optical flow of pixels between two consecutive video frames. A set of human heads may be detected in a video frame of the video stream based on the estimated horizon and scale of the video stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.