Image processing technique
CA 2037066 C · Owner: Carlson, Robert C. · Inventors: Carlson, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel method of image filtering to enhance the appearance of imagery, particularly synthetic aperture radar imagery. The invention uses detected edges to adaptively control the bandwidth of filters used for noise suppression. The technique of the present invention offers improved noise suppression while minimizing the loss of resolution due to filtering.
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 February 26, 1991 and granted August 23, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2013.
- 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.