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Proceedings Paper

Optimal sampling and quantization of dynamic speckles for object identification
Author(s): Takashi Okamoto; Jun Mizobe
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Paper Abstract

An authentication method using dynamic laser speckle has been investigated to identify scattering objects such as papers or plastic cards. The effects of sampling and quantization of speckle signals on identification performance are examined by using the equal error rate (EER) as a measure of the accuracy of object identification. It is found that a sampling interval of more than the correlation length of speckle fluctuations and a quantization of two or three bits give the lowest EER for data sizes ranging from 100 to 500 bytes.

Paper Details

Date Published: 13 September 2010
PDF: 6 pages
Proc. SPIE 7387, Speckle 2010: Optical Metrology, 738702 (13 September 2010); doi: 10.1117/12.870723
Show Author Affiliations
Takashi Okamoto, Kyushu Institute of Technology (Japan)
Jun Mizobe, Kyushu Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 7387:
Speckle 2010: Optical Metrology
Armando Albertazzi Goncalves; Guillermo H. Kaufmann, Editor(s)

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