Digital halftoning with spiral dots
US11667115B2 · kind B2 · utility
1Cited by
2References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2018 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | Mar 28, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N1/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A halftone raster image suitable for rendering a continuous-tone image includes a plurality of spiral dots. The spiral dots include image pixels arranged as a first arc or as a plurality of arcs which together represent a first spiral, and non-image pixels arranged as a second arc or as a plurality of arcs which together represent a second spiral. The spiral dots enable a controlled spreading of the ink within the dot, resulting in a higher image quality, ink saving, and faster drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.