Method and apparatus for linear color processing
CA 2095756 C · Owner: International Business Machines Corporation · Inventors: Edgar, Albert D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for processing multiple color signals representing an image including the steps of obtaining multiple linear color signals representing the image, translating the multiple linear color signals to a linear luminance signal and at least one linear chrominance signal and converting, the linear luminance signal to a nonlinear luminance signal. In addition an apparatus for processing multiple color signals representing an image including apparatus for obtaining multiple linear color signals representing the image, apparatus for translating the multiple linear color signals to a linear luminance signal and at least one linear chrominance signal, and apparatus for converting the linear …
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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 May 7, 1993 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2015.
- 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
Timeline From CIPO dates
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.