System and method to remove artifacts from fingerprint sensor scans
US8204281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2007 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 17, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/993
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and device for removing common artifacts, such as stiction, from fingerprint scans created by partial fingerprint scanners. The partial fingerprint scanner data is assessed to determine if successive partial fingerprint images are overly similar to each other, which can occur during stiction. If this similarity exceeds a preset threshold, then at least some of the overly similar partial images will be removed (redacted) from the overall image dataset. The complete overall image is generated from the redacted data set. This method is particularly useful for creating “intelligent” low-cost, low power partial fingerprint scanners and scanner driver chips that can pre-process the partial fingerprint data that is generated during the course of a finger swipe, and remove stiction artifacts on a real-time or near-real time basis using relatively simple and low power on-chip processing circuits, and then send the corrected data to more sophisticated processors for subsequent fingerprint analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.