Comparison of Methods for Determining the Contrast Distribution in Interference Images with Speckle Noise
L. Pyziaka, M.J. Matczak b and P. Zięba c
aFaculty of Mathematics and Applied Physics, Rzeszów University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
bInterfaculty Division of Mathematics and Natural Sciences, The State Higher School of Technology and Economics, S. Czarnieckiego 16, 37-500 Jarosław, Poland
cFaculty of Mathematics and Natural Sciences, University of Rzeszów, S. Pigonia 1, 35-310 Rzeszów, Poland
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Information about certain physical states of an examined object is encoded in the distribution of the fringe contrast in the metrological interference images of the object. Determining the contrast is one of the steps of converting the image into the distribution of the measured quantity in holographic fringe-contrast interferometry. In this paper, three methods of determining the fringe contrast in interference images containing speckle noise are compared. As the criterion for comparing the methods, the mean absolute error has been used. It turns out, in accordance with this criterium, the most effective method is the phase-shifting one.

DOI: 10.12693/APhysPolA.132.173
PACS numbers: 42.25.Hz, 42.30.-d, 42.30.Kq, 42.30.Ms