Overhead scanner device, image acquiring method, and computer-readable recording medium
US8503045B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2011 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Feb 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04743
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An overhead scanner device includes an area sensor, a linear sensor, and a control unit, wherein the control unit includes an area-image acquiring unit that controls the area sensor to successively acquire a plurality of images, a feature-point extracting unit that extracts feature points from the images acquired by the area-image acquiring unit, a velocity-vector computing unit that computes a velocity vector of each of the feature points by comparing the feature points extracted by the feature-point extracting unit between the images, and a read-start determining unit that determines a read start by the linear sensor, based on the velocity vector computed by the velocity-vector computing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.