Method and apparatus for extracting features of moving objects
CA 2117624 C · Owner: Nippon Telegraph & Telephone Corporation · Inventors: Kato, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is intended to reconstruct or acquire the shape of an object without rotating it. A TV camera 15 with a fish-eye lens 16 is used to conduct the image-sensing of a vehicle 12 as a moving object over a certain section of its path of travel and a background image is subtracted from each captured image to obtain a silhouette of the vehicle. The loci of movement of vehicle's tires in each image are calculated and used to calculate the positions of the viewpoint of the TV camera and the vehicle relative to each other in each image. The shape of the vehicle is reconstructed by projecting the silhouette for each captured image into a projection space while holding the …
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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 September 2, 1994 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2016.
- 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.