Calibration system and method for color image scanning
CA 2019725 C · Owner: Polaroid Corporation · Inventors: Smyth, William K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for calibrating signals provided by individual cells in a photodetector array scanned by light originating at a low-cost variable light source and reflected from a subject to be replicated in digital form by processing photodetector cell signals in a manner so that individual cell signals are corrected to compensate for fluctuations in source light. The system and method is particularly applicable to a color balanced photodetector array in which individual photodetectors are arranged in sets with each set having a variable number of rows oriented in a direction transverse to the direction of scan and columns parallel to the direction of scan. The invention is practiced …
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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 June 25, 1990 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2012.
- 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.