Abstract: Embodiments of the present invention provide a method and a module for identifying a background of a scene depicted in an acquired stream of video frames that may be used by a video-analysis system. For each pixel or block of pixels in an acquired video frame a comparison measure is determined. The comparison measure depends on difference of color values exhibited in the acquired video frame and in a background image respectively by the pixel or block of pixels and a corresponding pixel and block of pixels in the background image. To determine the comparison measure, the resulting difference is considered in relation to a range of possible color values. If the comparison measure is above a dynamically adjusted threshold, the pixel or the block of pixels is classified as a part of the background of the scene.
Type:
Grant
Filed:
May 29, 2008
Date of Patent:
October 18, 2011
Assignee:
Behavioral Recognition Systems, Inc.
Inventors:
John Eric Eaton, Wesley Kenneth Cobb, Kishor Adinath Saitwal, Bobby Ernest Blythe