Graphic data processing apparatus for producing a tone for an edge pixel and reducing aliasing effects
US5299308A · kind A · utility
42Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1991 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Feb 22, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/128
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The tones (or densities) of individual edge pixels of vector data are determined by first dividing each edge pixel into subpixels, after which the thus-determined tones are fed to a laser printer or other output unit. Advantageously, the present invention smooths jagged edges by performing an anti-aliasing process. To achieve this smoothing of graphic data, any of a variety of filters, each having particular weights, are used for the process of dividing edge pixels into subpixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.