Evaluation of line-wise and semi region-wise phase unwrapping for isoclinic parameter in digital photoelasticity
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Publication Details
Author list: Pinit P.
Publisher: Society of Photo-optical Instrumentation Engineers
Publication year: 2009
Volume number: 7375
ISSN: 0277-786X
eISSN: 1996-756X
Languages: English-Great Britain (EN-GB)
Abstract
Isoclinic parameter is one of the important parameters in (digital) photoelasticity. This paper presents a comparative study of two phase unwrapping methods for the parameter. The two phase unwrapping methods are a line-wise method and a semi-region-wise method. The paper focuses on the way that how the methods handle the wrapped isoclinic map(s), which is used to start unwrapping, having the edge-cut line and non-edge-cut line in the final or unwrapped isoclinic map. The edge-cut line and non-edge-cut line are the line of isoclinic jumps that link the points of discontinuity (isotropic points) with some points locating at the boundaries and inside the isoclinic map, respectively. For the evaluation, three models, the circular disk and ring under diametral compression and circular disk under three radial loads, were used. The comparative results show that the semi region-wise method is superior to the line wise method. ฉ 2009 SPIE.
Keywords
Line-wise phase unwrapping, Semi region-wise phase unwrapping
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