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[OH+99b]  Stochastic Clustered-Dot Dithering

Ostromoukhov:1999:SCD (Article)
Author(s)Ostromoukhov V. and Hersch R.
Title« Stochastic Clustered-Dot Dithering »
JournalJournal of Electronic Imaging
Volume8
Number4
Page(s)439--445
Year1999
URLhttp://www.iro.umontreal.ca/~ostrom/publications/abstracts.html#SPIE99_StochasticClust

Abstract
A new technique for building stochastic clustered-dot screens is being proposed. A large dither matrix comprising thousands of stochastically laid out screen dots is constructed by first laying out the screen dot centers. Screen dot centers are obtained by placing discrete disks of a chosen radius at free cell locations when traversing the dither array cells according to either a discretely rotated Hilbert space-filling curve or a random space-filling curve. After Delauney triangulation of the screen dot centers, the maximal surface of each screen dot is computed and isointensity regions are created. This isointensity map is converted into an antialiased gray scale image, i.e., into an array of preliminary threshold values. These threshold values are renumbered to obtain the threshold values of the final dither threshold array. By changing the disk radius, the screen dot size can be adapted to the characteristics of particular printing devices. Larger screen dots may improve the one reproduction of printers having important dot gain.

BibTeX code
@article{Ostromoukhov:1999:SCD,
  optpostscript = {},
  www = {http://www.spie.org/web/journals/jei/jei_oct99.html#011904},
  number = {4},
  month = oct,
  optnote = {},
  author = {Victor Ostromoukhov and Roger D. Hersch},
  optkey = {},
  optannote = {},
  url = {http://www.iro.umontreal.ca/~ostrom/publications/abstracts.html#SPIE99_StochasticClust},
  localfile = {papers/Ostromoukhov.1999.SCD.pdf},
  doi = {http://dx.doi.org/10.1117/1.482712},
  optciteseer = {},
  journal = {Journal of Electronic Imaging},
  volume = {8},
  title = {{S}tochastic {C}lustered-{D}ot {D}ithering},
  abstract = {A new technique for building stochastic clustered-dot screens is
              being proposed. A large dither matrix comprising thousands of
              stochastically laid out screen dots is constructed by first laying
              out the screen dot centers. Screen dot centers are obtained by
              placing discrete disks of a chosen radius at free cell locations
              when traversing the dither array cells according to either a
              discretely rotated Hilbert space-filling curve or a random
              space-filling curve. After Delauney triangulation of the screen
              dot centers, the maximal surface of each screen dot is computed
              and isointensity regions are created. This isointensity map is
              converted into an antialiased gray scale image, i.e., into an
              array of preliminary threshold values. These threshold values are
              renumbered to obtain the threshold values of the final dither
              threshold array. By changing the disk radius, the screen dot size
              can be adapted to the characteristics of particular printing
              devices. Larger screen dots may improve the one reproduction of
              printers having important dot gain.},
  pages = {439--445},
  year = {1999},
}

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