Method and device for suppressing electromagnetic background radiation in an image
CA 2451782 C · Owner: Leica Geosystems Ag · Inventors: Kirschner, Holger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
The invention relates to a method and a corresponding device with which images (A, B) for the same sensing range, however in different wavelength ranges (P N1, N2), are recorded at the same time or about the same time and with which , a signal to be detected is recorded for an image (A) serving as a P-image and , the wavelength of the signal is suppressed for an image (B) serving as an Nimage. The intensity of the background in the P-image (A) is deduced from the N-image (B) while using a model for the interfering radiation or background radiation (2). The position of the signal to be detected is determined by comparing the image contents of the P-image (A) and the background image (C) …
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.
Why it's free to use
- Filed June 7, 2002 and granted April 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2024.
- 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.