Optimal sampling and quantization of dynamic speckles for object identification

Takashi Okamoto; Jun Mizobe

doi:10.1117/12.870723

13 September 2010 Optimal sampling and quantization of dynamic speckles for object identification

Takashi Okamoto, Jun Mizobe

Proceedings Volume 7387, Speckle 2010: Optical Metrology; 738702 (2010) https://doi.org/10.1117/12.870723
Event: Speckle 2010, 2010, Florianapolis, Brazil

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.

Citation Download Citation

Takashi Okamoto and Jun Mizobe "Optimal sampling and quantization of dynamic speckles for object identification", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 738702 (13 September 2010); https://doi.org/10.1117/12.870723

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