Geometric feature extracting device, geometric feature extracting method, storage medium, three-dimensional measurement apparatus, and object recognition apparatus

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United States of America Patent

PATENT NO 8792726
APP PUB NO 20120294534A1
SERIAL NO

13575994

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Abstract

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A geometric feature extracting device comprising: first input means for inputting a three-dimensional shape model of a measurement object; generation means for generating two-dimensional parameter planes corresponding to curved surface patches that configure the three-dimensional shape model; first calculation means for calculating normal directions to points on the curved surface patches; holding means for holding the parameter planes and the normal directions in association with each other; second input means for inputting an observation direction used to observe the measurement object from an observation position; selection means for selecting regions in each of which the normal direction and the observation direction satisfy a predetermined angle condition from the parameter planes; and second calculation means for calculating geometric features on three-dimensional shape model corresponding to regions selected by the selection means as geometric features that configure geometric feature regions on the three-dimensional shape model, which are observable from the observation position.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kobayashi, Kazuhiko Yokohama, JP 218 3466
Watanabe, Daisuke Yokohama, JP 302 1640

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