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:
Oct. 03, 2011
Filed:
Nov. 25, 2008
Dan Schonfeld, Chicago, IL (US);
Karthik Hariharakrishnan, Chicago, IL (US);
Philippe Raffy, Edina, MN (US);
Fathy Yassa, Soquel, CA (US);
Dan Schonfeld, Chicago, IL (US);
Karthik Hariharakrishnan, Chicago, IL (US);
Philippe Raffy, Edina, MN (US);
Fathy Yassa, Soquel, CA (US);
NeoMagic Corporation, Santa Clara, CA (US);
Abstract
An object in a video sequence is tracked by object masks generated for frames in the sequence. Macroblocks are motion compensated to predict the new object mask. Large differences between the next frame and the current frame detect suspect regions that may be obscured in the next frame. The motion vectors in the object are clustered using a K-means algorithm. The cluster centroid motion vectors are compared to an average motion vector of each suspect region. When the motion differences are small, the suspect region is considered part of the object and removed from the object mask as an occlusion. Large differences between the prior frame and the current frame detect suspected newly-uncovered regions. The average motion vector of each suspect region is compared to cluster centroid motion vectors. When the motion differences are small, the suspect region is added to the object mask as a disocclusion.