The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2008
Filed:
Oct. 01, 2004
Andrew J. Chosak, Arlington, VA (US);
Péter L. Venetianer, McLean, VA (US);
Paul C. Brewer, Arlington, VA (US);
John I. W. Clark, Leesburg, VA (US);
Alan J. Lipton, Herndon, VA (US);
Andrew J. Chosak, Arlington, VA (US);
Péter L. Venetianer, McLean, VA (US);
Paul C. Brewer, Arlington, VA (US);
John I. W. Clark, Leesburg, VA (US);
Alan J. Lipton, Herndon, VA (US);
ObjectVideo, Inc., Reston, VA (US);
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.