Document reading apparatus and an image formation apparatus therewith
US7889393B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Mar 26, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4097
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A document reading apparatus and an image formation apparatus are disclosed. The document reading apparatus detects a locally patent image pixel in a main scanning direction, determines whether locally patent image pixels continuously appear at the same pixel position in the main scanning direction, and counts the number of lines on which locally patent image pixels continuously appear at the same position in the main scanning direction. When the number exceeds a predetermined value, pixel values of locally patent image pixels detected afterwards at the same position in the main scanning direction are removed. If a locally patent image is not detected, the counted number of lines is initialized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.