Method and apparatus for digital imaging with reduced periodic artifacts using stochastic gradients
US6456397B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | May 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/111
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a digital imaging system including an array of imaging devices that apply an image to a recording medium such as a lithographic printing plate, elimination or reduction of longitudinal imaging artifacts is accomplished by blending the zones imaged by each the devices. In the course of a complete scan of the recording medium, the imaging devices each traverse a series of longitudinal columns of dot locations, and the devices are fired only at appropriate dot locations as determined by the digital image data. By operating adjacent imaging devices such that the zones they would ordinarily cover are blended in a random pattern, artifacts at the boundary between zones (such as seams) are hidden. While sufficient visual disruption to eliminate artifacts is ensured, noticeable visual artifacts are not created as a consequence of the disruption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.