System for processing received print data prior to printing
US5978553A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Jan 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0071
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When print data is received from a host computer, a rendering/compression/expansion unit generates image data in a unit of a band, then a specified logical operation is performed on the image data in the band unit and the resultant image data is compressed to be stored. When the image data corresponding to one page of an original image is stored, the image data is expanded and printed by a printer. Since the generation of image data and logical operation are performed in the band unit, the memory capacity required for the processing is small. Also, since the image data is compressed after the above process, the memory capacity required for storing is small. By virtue of this, resolution or tone of an original image does not have to be decreased depending on a memory capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.