Inter-separation color image processing using error diffusion
CA 2210244 C · Owner: Mantell, David A. · Inventors: Eschbach, Reiner; Mantell, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for processing an input image including a plurality of input pixels each having a first number of possible input levels of optical density toform an output image including a plurality of separations each including a plurality of output pixels each having a second number of possible output levels of optical density. The method includes the steps of generating a first threshold reference signal as a function of the output levels of optical densityof a plurality of corresponding pixels each being selected from one of the plurality of separations, modifying a current one of the plurality of input pixels in a current one of the plurality of separations in accordance with an error signal …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 11, 1997 and granted October 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.