Merge plane generation for a data processing pipeline
US5999710A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Jun 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A print data processing pipeline for use in a color electrophotographic printer optimizes print quality and minimizes memory usage by separately processing lossy and lossless print data. Lossy print data may include print data for images and lossless print data may include print data for text, line art, and graphics. Partitioning print data into lossy and lossless elements allows application of the print data compression operations optimized for each type of print data. High compression ratios can be achieved on lossy print data by applying visually lossless compression operations designed for the lossy print data. In addition, high compression ratios can be achieved on the lossless print data by applying lossless compression operations designed for the lossless print data. A merge unit combines the lossy and lossless print data streams after decompression to reconstruct the original image using merge data. The merge data is generated in an image processing operation which accounts for the different transparency modes of the page description language print data so that the correct foreground and background placement of objects is maintained. Placement of the color space conversion …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.