Electrostatic Halftoning.
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| Title: | Electrostatic Halftoning. |
|---|---|
| Authors: | Schmaltz, Christian1 schmaltz@mia.uni-saarland.de, Gwosdek, Pascal1 gwosdek@mia.uni-saarland.de, Bruhn, Andrés1 bruhn@mia.uni-saarland.de, Weickert, Joachim1 weickert@mia.uni-saarland.de |
| Source: | Computer Graphics Forum. Dec2010, Vol. 29 Issue 8, p2313-2327. 15p. 2 Color Photographs, 3 Black and White Photographs, 1 Illustration, 1 Diagram, 4 Graphs. |
| Subjects: | Halftone process, Graphics processing units, Computer graphics, Algorithms, Image processing |
| Abstract: | We introduce a new global approach for image dithering, stippling, screening and sampling. It is inspired by the physical principles of electrostatics. Repelling forces between equally charged particles create a homogeneous distribution in flat areas, while attracting forces from the image brightness values ensure a high approximation quality. Our model is transparent and uses only two intuitive parameters: One steers the granularity of our halftoning approach, and the other its regularity. We evaluate two versions of our algorithm: A discrete version for dithering that ties points to grid positions, as well as a continuous one which does not have this restriction, and can thus be used for stippling or sampling density functions. Our methods create very few visual artefacts, reveal favourable blue-noise behaviour in the frequency domain, and have a lower approximation error under Gaussian convolution than state-of-the-art methods. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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