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The method for testing effectiveness of holographic security devices

The method for evaluation of holographic security effectiveness has been developed. The use of the Wiener filter based method allows the holograms patterns to be identified from a printed page. Due to elimination of background influence on a correlation function of two analysed images it is possible to estimate a quality factor of a holographic device. The Wiener filter algorithm for numerical analysis of digital images has been proposed. On the basis of correlation analysis the quantitative quality coefficient of the holographic security has been defined.