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:
Mar. 30, 2010
Filed:
Jul. 16, 2003
Rong Xiao, Suzhou, CN;
Long Zhu, Los Angeles, CA (US);
Lei Zhang, Beijing, CN;
Mingjing LI, Beijing, CN;
Hong-jiang Zhang, Beijing, CN;
Rong Xiao, Suzhou, CN;
Long Zhu, Los Angeles, CA (US);
Lei Zhang, Beijing, CN;
Mingjing Li, Beijing, CN;
Hong-Jiang Zhang, Beijing, CN;
Microsoft Corporation, Redmond, WA (US);
Abstract
Face detection techniques are provided that use a multiple-stage face detection algorithm. An exemplary three-stage algorithm includes a first stage that applies linear-filtering to enhance detection performance by removing many non-face-like portions within an image, a second stage that uses a boosting chain that is adopted to combine boosting classifiers within a hierarchy 'chain' structure, and a third stage that performs post-filtering using image pre-processing, SVM-filtering and color-filtering to refine the final face detection prediction. In certain further implementations, the face detection techniques include a two-level hierarchy in-plane pose estimator to provide a rapid multi-view face detector that further improves the accuracy and robustness of face detection.