Distortion invariant correlation filters application for quality inspection of master-matrix for security holograms

Evgeny Zlokazov; Dmitriy Shaulskiy; Rostislav Starikov; Sergey Odinokov; Alexander Zherdev; Vasiliy Koluchkin; Ivan Shvetsov; Andrey Smirnov

doi:10.1117/12.2016375

29 April 2013 Distortion invariant correlation filters application for quality inspection of master-matrix for security holograms

Evgeny Zlokazov, Dmitriy Shaulskiy, Rostislav Starikov, Sergey Odinokov, Alexander Zherdev, Vasiliy Koluchkin, Ivan Shvetsov, Andrey Smirnov

Author Affiliations +

Proceedings Volume 8748, Optical Pattern Recognition XXIV; 87480P (2013) https://doi.org/10.1117/12.2016375
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

Security holograms (SH) are perspective for document and product authenticity protection due to difficulties of such a protection mark falsification. Mass production of SH uses widespread technology of hot foil or lavsan paper stamping. The quality of holograms significantly depends on perfection of nickel master-matrix that is used in stamping equipment. We represent the method of automatic quality inspection of nickel master-matrix based on digital processing of its surface relief microphotographs. Proposed processing algorithm is based on combination of image spatial frequency analysis and image matching using distortion invariant correlation filters. The results of our method application for real SH master-matrices inspection are shown in this paper.

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Evgeny Zlokazov, Dmitriy Shaulskiy, Rostislav Starikov, Sergey Odinokov, Alexander Zherdev, Vasiliy Koluchkin, Ivan Shvetsov, and Andrey Smirnov "Distortion invariant correlation filters application for quality inspection of master-matrix for security holograms", Proc. SPIE 8748, Optical Pattern Recognition XXIV, 87480P (29 April 2013); https://doi.org/10.1117/12.2016375

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