Method and apparatus for removing uneven brightness in an image
CA 2515564 C · Owner: Zavadsky, Vyacheslav L. · Inventors: Zavadsky, Vyacheslav L.; Abt, Jason
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a method and apparatus for reducing uneven brightness in an image from a particle based image system. This uneven brightness is most often seen as regions of shadow but may also be seen as regions of over brightness. In cases where the uneven brightness is in the form of shadowing the method corrects for the shadowy regions by first identifying the area of shadow obtaining brightness information from a region near the shadow where the brightness is optimal, applying statistical methods to determine the measured brightness as a regression function of the optimal brightness and number and proximity of shadowy objects then correcting the shadow area brightness by …
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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 August 10, 2005 and granted February 3, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.