Method of and apparatus for processing an image signal
CA 2056985 A1 · Owner: Tillett, Robin D. · Inventors: Tillett, Robin D.; Mcfarlane, Nigel J. B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of analysing a visual image of a complex three dimensional object such as a plant, avoids misclassification of shadows as plant material. A colour video signal of plant material positioned against a background of substantially uniform colour is analysed to give colour coordinates for each pixel in three dimensional colour space. Each pixel is classified as representing background or plant material, according to whether the colour coordinates of the pixel fall inside or outside, respectively a, substantially cone shaped volume in colour space. The cone shaped volume is determined by extending a cone from a region representing the colour of the background surface, towards the origin …
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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 24, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 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.