System and method for mitigating the visual effects of halo
CA 2210552 C · Owner: Harrington, Steven J. · Inventors: Goodman, Nancy B.; Harrington, Steven J.; Smith, Bradley W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for mitigating or eliminating a halo effect in a printer when black objects are adjacent color objects. In a full color xerographic printer, particularly an image on image printer in which full color composite images are imaged and developed in a single pass through the xerographic system, an image processing method is described to reduce or eliminate the halo effect. When a black object is to be placed adjacent a colored object (e.g. black text on a magenta background) a determination is made to locate the boundary between the black and the colorant. The black pixels immediately adjacent the colored objects are created using process black (a combination of cyan magenta and, yellow …
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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 16, 1997 and granted May 15, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.