Spatial filter system for image processing
CA 2014753 C · Owner: Dolazza, Enrico · Inventors: Dolazza, Enrico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For: Spatial Filter System, ABSTRACT OF DISCLOSURE A digital spatial filter system includes means for separating an image formed of a matrix of pixels into four regularly distributed interleaved subimages from alternate rows and columns of the matrix pixels; means for convolving each of the four subimages with two orthogonal unidimensional vectors of, a convolving kernel to produce four filtered subimages; and means for recombining said convolved four filtered subimages into the original image filtered.
Read the whole patent
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 April 18, 1990 and granted September 7, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 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.