System and method for determining 3D surface features and irregularities on an object

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11176655
APP PUB NO 20150213606A1
SERIAL NO

14329752

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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This invention provides a system and method for determining the location and characteristics of certain surface features that comprises elevated or depressed regions with respect to a smooth surrounding surface on an object. A filter acts on a range image of the scene. A filter defines an annulus or other perimeter shape around each pixel in which a best-fit surface is established. A normal to the pixel allows derivation of local displacement height. The displacement height is used to establish a height deviation image of the object, with which bumps, dents or other height-displacement features can be determined. The bump filter can be used to locate regions on a surface with minimal irregularities by mapping such irregularities to a grid and then thresholding the grid to generate a cost function. Regions with a minimal cost are acceptable candidates for application of labels and other items in which a smooth surface is desirable.

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Patent Owner(s)

  • COGNEX CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akopyan, Mikhail Sudbury, US 8 154
Jacobson, Lowell D Grafton, US 21 319
Wolff, Robert A Sherborn, US 21 442

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