Augmenting photometric stereo with coaxial illumination
Augmenting photometric stereo with coaxial illumination
- Author(s): G. McGunnigle and J. Dong
- DOI: 10.1049/iet-cvi.2009.0038
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- Author(s): G. McGunnigle 1 and J. Dong 2
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View affiliations
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Affiliations:
1: Carinthian Tech. Research AG., Villach, Austria
2: Department of Computer Science and Technology, Ocean University of China, Qingdao, People's Republic of China
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Affiliations:
1: Carinthian Tech. Research AG., Villach, Austria
- Source:
Volume 5, Issue 1,
January 2011,
p.
33 – 49
DOI: 10.1049/iet-cvi.2009.0038 , Print ISSN 1751-9632, Online ISSN 1751-9640
The authors propose a new photometric stereo (PS) method that augments a conventional four-light approach with coaxial illumination. The new method is based on a four-light, leave-one-out approach: the authors argue that coaxial lighting improves robustness to shadowing and specular highlights. The authors also specify a method to detect pixels that are shadowed or that do not conform to Lambert's law. The approach is tested on cylinders of various materials. The authors found that for dielectrics the method gave reliable results for gradients in the range −2 to 2. The results lead them to conclude that coaxial illumination makes PS more robust to shadow and specularity.
Inspec keywords: stereo image processing
Other keywords:
Subjects: Computer vision and image processing techniques; Optical, image and video signal processing
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