Two-stage local and global fingerprint matching technique for automated fingerprint verification/identification
US6778685B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2000 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1365
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for determining a degree of match between a search fingerprint and a reference fingerprint comprises the following steps:a) Extracting at least one first search feature from a first region of said search fingerprint thereby forming a local search feature vector,b) Extracting at least one second search feature from a second region of said search fingerprint thereby forming a global search feature vector, whereby said second region comprises said first region,c) Determining a first similarity degree by comparing said local search feature vector with a local reference feature vector,d) Determining a second similarity degree by comparing said global search feature vector with a global reference feature vector of said reference fingerprint and using said first similarity degree,e) Determining said degree of match from said second similarity degree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.