AUTHENTICATION OF SECURITY DOCUMENTS AND MOBILE DEVICE TO CARRY OUT AUTHENTICATION Russian patent published in 2018 - IPC G07D7/00 

FIELD: control devices.

SUBSTANCE: method of authenticating security documents and a mobile device, in particular a smartphone, programmed to carry out the method, based on an analysis of features which are produced by intaglio printing, which analysis involves a decomposition of sample images of a candidate document to be authenticated based on wavelets, each sample image being digitally processed by performing a wavelet transform of the sample image in order to derive a set of classification features. Method is based on an adaptive approach, which includes the following steps: prior to carrying out the Wavelet transform, defining a categorisation map containing local information about different intaglio line structures that are found on the security documents, carrying out a wavelet selection amongst a pool of wavelet types based on the categorisation map; and performing the wavelet transform of the sample image on the basis of the selected wavelet.

EFFECT: authentication of security documents.

15 cl, 9 dwg, 1 tbl