Method and apparatus for face tracking utilizing integral gradient projections
US8873811B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Dec 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30201
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus and computer program product are provided for estimating and verifying translation motion and/or a scaling factor between face regions in respective frames during face tracking. A method determines translation motion between face regions in two successive frames based upon integral gradient projections of a face region in a first frame and a corresponding window in a second frame. The method also verifies the translation motion between the first and second frames utilizing integral gradient projections. A method also determines a transfer function relating integral projection curves of a face region in a first frame that has a predefined position and a predetermined size and a co-located window of same size in a second frame, determines a scaling factor based upon the transfer function and then verifies the scaling factor utilizing integral gradient projections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.