Image reading apparatus and processing method of an image signal
US6594038B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1999 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Mar 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/0455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The image reading apparatus of the invention has a function of changing over between ordinary image reading mode and fine reading mode, and in the fine reading mode, the moving speed of the carriage moving the photoelectric converter is set to 1/n of the ordinary reading mode, and the number of times of incorporating the signal data being read out from the photoelectric converter into the image processing circuit is set to 1/n of the ordinary reading mode, so that lowering of resolution in the carriage moving direction is prevented. The image reading apparatus of the invention allows the user to select and change over freely the ordinary image reading mode and fine reading mode, and allows the value of n to be selected freely depending on the resolution of the desired image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.