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Proceedings Paper

Free-form object modeling and inspection
Author(s): Zhibin Lei; Hakan Civi; David B. Cooper
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Paper Abstract

In this paper we summarize our results and methods in modeling and representing free-form objects by implicit polynomials, and outline the application of this approach to the industrial inspection problem. Implicit polynomials have been widely used in the computer vision and graphics communities for many years with their flexibility, robustness and invariant features. The effectiveness of the use of this representation hinges upon two factors; the stability of the implicit polynomial fitting procedure and the segmentation of the object shape into manageable pieces. In much of the previous work, algebraic invariants of implicit polynomials have been used for estimation or recognition. In this paper, we propose a general multi-scale free-form object modeling and recognition framework where shape information at different scale is captured by different degree and size polynomials (patchlets). We also show that pose estimation and in turn object recognition can be done without using the algebraic invariants. To accomplish this a closed-form pose solution is obtained by comparing the corresponding patchlets. An overview of a free-form object recognition and inspection system built upon these results is given in the paper.

Paper Details

Date Published: 3 October 1996
PDF: 12 pages
Proc. SPIE 2899, Automated Optical Inspection for Industry, (3 October 1996); doi: 10.1117/12.253004
Show Author Affiliations
Zhibin Lei, Brown Univ. (United States)
Hakan Civi, Brown Univ. (United States)
Bogazici Univ. (Turkey)
David B. Cooper, Brown Univ. (United States)

Published in SPIE Proceedings Vol. 2899:
Automated Optical Inspection for Industry
Frederick Y. Wu; Shenghua Ye, Editor(s)

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