Digital halftoning with spiral dots
US11915072B2 · kind B2 · utility
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15References
20Claims
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Key dates
| Filing date | Apr 27, 2020 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Jul 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4057
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A halftone raster image, suitable for rendering a continuous-tone image, which comprises a plurality of regularly tiled spiral dots. Said spiral dots comprise (i) image pixels arranged as a first arc (200) or as a plurality of arcs which together represent a first spiral (100), and (ii) non-image pixels arranged as a second arc (201) or as a plurality of arcs which together represent a second spiral (101), wherein neighbour halftone dots from said plurality of regularly tiled halftone dots represent a double spiral or triple spiral.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.