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  4. Method and Apparatus for Generating Digital Halftone Images by Using Multi Color Dithering
 
patent

Method and Apparatus for Generating Digital Halftone Images by Using Multi Color Dithering

Ostromoukhov, V.
•
Hersch, R. D.  
2006

The invention provides a method and apparatus for the reproduction of color images by multi-color dithering. Multi-color dithering is an extension of bi-level dithering for halftoning an input image using as primary colors an arbitrary number of inks. The inks may comprise standard inks or non-standard inks such as non-process color inks, opaque inks, metallic inks, variable color inks and fluorescent inks. Multi-color dithering provides a solution for creating artistic multi-color dithered images, whose screen elements are made of artistic color screen shapes such as micro-letters, symbols and ornaments. When printed at high resolution and at high registration accuracy, multi-color dithering using large dither arrays incorporating artistic dither shapes provides an effective solution for preventing counterfeiting. The use of non-standard inks offers additional protection. Multi-color dithering also offers a solution for printers requiring that all inks are printed side by side, without overlaps.

  • Details
  • Metrics
Type
patent
EPO Family ID

36462675

Author(s)
Ostromoukhov, V.
Hersch, R. D.  
Note

Alternative title(s) : (en) Method and apparatus for generating digital halftone images by multi color dithering

URL

USPTO link

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=7054038
TTO classification

TTO:6.0404

EPFL units
LSP  
AVP-R-TTO  
IdentifierCountry codeKind codeDate issued

US7054038

US

B1

2006-05-30

Available on Infoscience
January 31, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/240275
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