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29 December 2004 The method for testing effectiveness of holographic security devices
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Abstract
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.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jacek Janucki and Jan Owsik "The method for testing effectiveness of holographic security devices", Proc. SPIE 5615, Technologies for Optical Countermeasures, (29 December 2004); https://doi.org/10.1117/12.578018
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