Abstract

Intensity binarization or clipping method is often used to carry out the fast calculation of a correlation function of speckle intensity. The shape of a clipped correlation function becomes sharp compared with a nonclipped one. It is expected that we can determine the peak position of a clipped cross-correlation function more accurately than that of a nonclipping one. The accuracy of the peak detection in speckle correlation is studied by using a computer simulation. The computer simulation for certain optical systems shows that the clipping technique is suitable for the accurate measurement of velocity and displacement based on the peak detection of speckle correlation.

© 1990 Optical Society of America

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