Bitmap-image pattern matching apparatus for correcting bitmap errors in a printing system
US5404411A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1990 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Dec 27, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/993
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Improvements in bit-image quality in printing systems is achieved by providing several different pattern matching processors. Each pattern matching processor comprises a lookup table of patterns and corresponding replacement image patterns. A source image is modified by replacing areas in the source image that match patterns with the corresponding image patterns. Pattern matching processors are chosen depending on: the type of image being processed, input from the operator (user), feedback from the xerographic processor, and the color of the image. A user interface is provided which allows a user to download template and pattern data for each pattern matching processor. Pattern matching can be used to correct single-bit, half-bit, line-growth, xerographic effects and aliasing errors, and to provide control of print quality to the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.