Fast optimal linear approximation of the images of variably illuminated solid objects for recognition
CA 2378286 A1 · Owner: Ishiyama, Rui · Inventors: Penev, Penio S.; Ishiyama, Rui; Blicher, Albert Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An efficient computation of low-dimensional linear subspaces that optimally contain the set of, images that are generated by varying the illumination impinging on the surface of a three-, dimensional object for many different relative positions of that object and the viewing camera. The matrix elements of the spatial covariance matrix for an object are calculated for an arbitrary, pre-determined distribution of illumination conditions. The maximum complexity is reduced for, the model by approximating any pair of normal-vector and albedo from the set of all such pairs, of albedo and normals with the centers of the clusters that are the result of the vector, quantization of this set. …
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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 March 22, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 22, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2024.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.