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Proceedings Paper

Thinning by the motion of the structuring element for 3D inspection
Author(s): Chun-Wai Hui; Lee Ming Cheng
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Paper Abstract

In pixel based setting, thinning is often accomplished by removing contour points in connected regions iteratively. Such algorithms require the image be presented in a regular spatial grid. Missing data points are not allowed. In range data processing, such requirements are not always fulfilled due to reflectance and sensor geometry. An algorithm is developed for extraction and thinning of 3D linear features. It is based on fitting of structuring element. The data is assumed to be 3D measurement points of the objects of interest. Three criteria are employed to extract and simplified the required linear feature. First, connected point sets are identified. For each connected set, an occurrence of linear structure is then located by fitting a cylindrical structuring element. Finally, the complete linear feature is identified by motion of the structuring element along the major axis. This algorithm is useful for 3D inspection.

Paper Details

Date Published: 18 August 1997
PDF: 9 pages
Proc. SPIE 3185, Automatic Inspection and Novel Instrumentation, (18 August 1997); doi: 10.1117/12.284043
Show Author Affiliations
Chun-Wai Hui, City Univ. of Hong Kong (Hong Kong)
Lee Ming Cheng, City Univ. of Hong Kong (Hong Kong)

Published in SPIE Proceedings Vol. 3185:
Automatic Inspection and Novel Instrumentation
Anthony Tung Shuen Ho; Sreenivas Rao; Lee Ming Cheng, Editor(s)

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