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Proceedings Paper

Digital speckle displacement measurement by a thresholding technique
Author(s): Dong Hui Li; Li Guo; Tian Qiu
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Paper Abstract

The digital speckle measurement technique has a wide-range application. This paper proposed a thresholding method, which is different from usual template-matching method, to measure the displacement of speckles. To achieve this, the thresholding method employs a statistical process. The statistical analysis is performed on binary speckle images rather than on original grayscale speckle images. The binarization is performed by a thresholding technique. A fast algorithm of the thresholding method is developed which makes it acceptable in practice. A low-pass morphological filter is incorporated into the thresholding method for reducing image's noise. An optical and analysis system is set up to verify the method's validity and improvement.

Paper Details

Date Published: 23 February 2006
PDF: 7 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615059 (23 February 2006); doi: 10.1117/12.676936
Show Author Affiliations
Dong Hui Li, Univ. of Science and Technology of China (China)
Li Guo, Univ. of Science and Technology of China (China)
Tian Qiu, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Xun Hou; Jiahu Yuan; James C. Wyant; Hexin Wang; Sen Han, Editor(s)

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