Feature tracking using a dense feature array
US6192156A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Apr 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2013/0081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for feature tracking across a plurality of related image frames by developing a dense array of features and their paths as a deformable, regularly spaced grid, with vectors for each nodal feature point in the grid being derived through a process related to optical flow. The resulting dense feature array can be applied to techniques such as tracking two-dimensional shapes across frames, estimating three-dimensional paths of selected feature points, estimating three-dimensional camera paths from multiple feature points, or recovering estimated three-dimensional scene structure (including estimated depths of object surfaces) from feature tracking data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.