Tide filtering for video surveillance system
US7424167B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2004 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Dec 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/52
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A machine-accessible medium containing software code that, when read by a computer, causes the computer to perform method for filtering a video in a video system. The method may include generating a foreground mask and a background model from a video, where the foreground mask comprises moving pixels in the video and the background model comprises a statistical description, including a mean and a variance value, for each pixel in the video. Then the background model variance is filtered with a one-dimensional high pass filter in a single orientation. Next, for each linear grouping of pixels in the single orientation of the filtered variance, a first edge pixel is detected between a high-variance group of pixels and a low-variance group of pixels. Then a first waterline position is detected as an area bounded by the first edge pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.