Robust multi-view face detection methods and apparatuses
US7689033B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2003 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | May 24, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.