Color image scanning apparatus for reading a color original without color shift regardless of a magnification ratio of the original
US5483359A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Oct 7, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/1013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color image scanning apparatus is disclosed which includes: an image sensor for scanning an original, the image sensor including a plurality of line sensors arranged in a sub-scanning direction; a determination circuit for determining the traveling speed of the image sensor in the sub-scanning direction in accordance with a magnification ratio of the original; a driving circuit for moving the image sensor in the sub-scanning direction at the speed determined by the determination circuit; a correction circuit for correcting the output of the image sensor to simultaneously output signals corresponding to an identical position of the original; a filter for filtering the output of the correction circuit in accordance with the magnification ratio of the original and the speed determined by the determination circuit, wherein the determination circuit determines the speed so that each distance of the plurality of line sensors arranged in the sub-scanning direction is substantially equal to an integral multiple of a traveling pitch per line at which the image sensor travels in the sub-scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.