Digital image forming apparatus and method for changing magnification ratio for image according to image data stored in a memory
US6486971B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Mar 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/393
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming apparatus includes a photoconductor and an image reading device to receive and read a light reflected from an original document carrying image data of an image of the original document and to convert the received light carrying the image data into an analog electrical signal carrying the image data. An analog-to-digital converter converts the analog electrical signal carrying the image data into a digital signal carrying the digital image data and a memory stores the digital image data. An image writing device forms an image according to the digital image data on a surface of the photoconductor with a laser beam modulated according to the digital image data. The image forming apparatus includes a first enlarging/reducing device to change a magnification ratio of the image and is provided upstream of the memory in a direction in which the digital image data is sent. Also included is a second enlarging/reducing device which changes a magnification ratio for the image and is provided downstream of the memory in the direction in which the digital image data is sent. The digital image data processed with the first enlarging/reducing device is stored in the memory and th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.