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Special Section on 3-D and 4-D Imaging Techniques and Applications

Lateral resolution challenges for triangulation-based three-dimensional imaging systems

[+] Author Affiliations
David MacKinnon

National Research Council of Canada, Ottawa, Ontario, Canada

Jean-Angelo Beraldin

National Research Council of Canada, Ottawa, Ontario, Canada

Luc Cournoyer

National Research Council of Canada, Ottawa, Ontario, Canada

Michel Picard

National Research Council of Canada, Ottawa, Ontario, Canada

François Blais

National Research Council of Canada, Ottawa, Ontario, Canada

Opt. Eng. 51(2), 021111 (Mar 12, 2012). doi:10.1117/1.OE.51.2.021111
History: Received May 2, 2011; Revised July 15, 2011; Accepted August 29, 2011
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Abstract.  Lateral resolution is a particularly challenging concept to quantify in triangulation-based three-dimensional (3-D) imaging systems. We present these challenges, then describe an artifact-based methodology for evaluating the lateral resolution of a triangulation-based 3-D imaging system that uses laser spots or laser lines. In particular, the response of a 3-D imaging system to a spatial discontinuity (step edge) has traditionally been modeled as a first-order linear system. We model the response of a triangulation-based laser imaging system to a spatial step edge from first principles and demonstrate that the response should be modeled as a non linear system. This model is then used as a basis for evaluating the lateral (structural) resolution of a triangulation-based laser imaging system.

© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

David MacKinnon ; Jean-Angelo Beraldin ; Luc Cournoyer ; Michel Picard and François Blais
"Lateral resolution challenges for triangulation-based three-dimensional imaging systems", Opt. Eng. 51(2), 021111 (Mar 12, 2012). ; http://dx.doi.org/10.1117/1.OE.51.2.021111


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