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. 09, 2012
Filed:
Feb. 18, 2009
Wesley Kenneth Cobb, Woodlands, TX (US);
Kishor Adinath Saitwal, Houston, TX (US);
Bobby Ernest Blythe, Houston, TX (US);
Tao Yang, Katy, TX (US);
Wesley Kenneth Cobb, Woodlands, TX (US);
Kishor Adinath Saitwal, Houston, TX (US);
Bobby Ernest Blythe, Houston, TX (US);
Tao Yang, Katy, TX (US);
Behavioral Recognition Systems, Inc., Houston, TX (US);
Abstract
Techniques are disclosed for a computer vision engine to update both a background model and thresholds used to classify pixels as depicting scene foreground or background in response to detecting that a sudden illumination changes has occurred in a sequence of video frames. The threshold values may be used to specify how much pixel a given pixel may differ from corresponding values in the background model before being classified as depicting foreground. When a sudden illumination change is detected, the values for pixels affected by sudden illumination change may be used to update the value in the background image to reflect the value for that pixel following the sudden illumination change as well as update the threshold for classifying that pixel as depicting foreground/background in subsequent frames of video.