Palm scanner using a programmable nutating mirror for increased resolution
US6928195B2 · kind B2 · utility
19Cited by
169References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2001 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Sep 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1324
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for increasing image resolution in a palm print scanner. The method of the invention requires the synchronization of a nutating mirror with a camera frame sync. A first image is scanned at a first nutation position. The mirror is nutated by a fraction of a pixel amount in one direction. Another image is scanned at a second nutation position. The process of nutating the mirror to a different nutation position and scanning an image is repeated until all sub-pixels needed to increase an image resolution are obtained. All of the sub-pixels obtained are then interlaced to obtain a higher resolution image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.