Method and apparatus for obtaining magnification error for image scanning apparatus
US6377362B1 · kind B1 · utility
1Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04787
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for obtaining a magnification error in a first direction for an image scanning apparatus is disclosed. The method includes steps of (a) providing a marking pattern having a particular length in the first direction, (b) scanning the marking pattern to obtain a scanning length in the first direction, and (c) calculating the magnification error in the first direction from scanning length and the particular length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.