Video object segmentation using active contour model with directional information
US6912310B1 · kind B1 · utility
43Cited by
11References
15Claims
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Key dates
| Filing date | Aug 28, 2000 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Mar 1, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/62
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Object segmentation and tracking are improved by including directional information to guide the placement of an active contour (i.e., the elastic curve or ‘snake’) in estimating the object boundary. In estimating an object boundary the active contour deforms from an initial shape to adjust to image features using an energy minimizing function. The function is guided by external constraint forces and image forces to achieve a minimal total energy of the active contour. Both gradient strength and gradient direction of the image are analyzed in minimizing contour energy for an active contour model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.