Processing a fingerprint for fingerprint matching
US9514351B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2014 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Apr 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1359
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Processing a fingerprint can include determining one or more optimal weights based on ridge flow angles or ridge flow angle differences. Determination of the optimal weight(s) can be based on predicting a ridge flow angle for each cell in a ridge flow map using one or more neighboring cells. The optimal weights may be estimated so as to minimize error between the predicted and actual ridge flow angles. Alternatively, the optimal weight(s) may be determined using a predicted ridge flow angle difference for each cell in a difference map that is based on an actual ridge flow angle difference for one or more neighboring cells. The optimal weights can be estimated to minimize the error between predicted and actual angle differences. Additionally, a correlation penalty may be determined based on an extent of spatial correlation in the ridge flow angle differences in the difference map.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.