公开(公告)号：AU2014210743B2

公开(公告)日：2017-03-09

申请号：AU2014210743

申请日：2014-02-04

Applicant: KBA NOTASYS SA

Inventor： LOHWEG VOLKER ,  HOFFMANN JAN LEIF ,  DORKSEN HELENE ,  HILDEBRAND ROLAND ,  GILLICH EUGEN ,  HOFMANN JURG ,  SCHAEDE JOHANNES GEORG

IPC: G07D7/00 ,  G07D7/20

Abstract: A method of authenticating security documents and a mobile device, especially 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. The method is based on an adaptive approach, which includes the following steps : - prior to carrying out the Wavelet transform, defining a categorization 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 categorization map; and - performing the Wavelet transform of the sample image on the basis of the selected Wavelet.

公开(公告)号：CA2899868A1

公开(公告)日：2014-08-07

申请号：CA2899868

申请日：2014-02-04

Applicant: KBA NOTASYS SA

Inventor： LOHWEG VOLKER ,  HOFFMANN JAN LEIF ,  DORKSEN HELENE ,  HILDEBRAND ROLAND ,  GILLICH EUGEN ,  HOFMANN JURG ,  SCHAEDE JOHANNES GEORG

IPC: G07D7/00 ,  G07D7/20

Abstract: A method of authenticating security documents and a mobile device, especially 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. The method is based on an adaptive approach, which includes the following steps : - prior to carrying out the Wavelet transform, defining a categorization 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 categorization map; and - performing the Wavelet transform of the sample image on the basis of the selected Wavelet.

公开(公告)号：CA2899868C

公开(公告)日：2019-12-31

申请号：CA2899868

申请日：2014-02-04

Applicant: KBA NOTASYS SA

Inventor： LOHWEG VOLKER ,  HOFFMANN JAN LEIF ,  DORKSEN HELENE ,  HILDEBRAND ROLAND ,  GILLICH EUGEN ,  HOFMANN JURG ,  SCHAEDE JOHANNES GEORG

IPC: G07D7/20

Abstract: A method of authenticating security documents and a mobile device, especially 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. The method is based on an adaptive approach, which includes the following steps : - prior to carrying out the Wavelet transform, defining a categorization 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 categorization map; and - performing the Wavelet transform of the sample image on the basis of the selected Wavelet.

公开(公告)号：AU2014210743A1

公开(公告)日：2015-07-30

申请号：AU2014210743

申请日：2014-02-04

Applicant: KBA NOTASYS SA

Inventor： LOHWEG VOLKER ,  HOFFMANN JAN LEIF ,  DORKSEN HELENE ,  HILDEBRAND ROLAND ,  GILLICH EUGEN ,  HOFMANN JURG ,  SCHAEDE JOHANNES GEORG

IPC: G07D7/00 ,  G07D7/20

Abstract: A method of authenticating security documents and a mobile device, especially 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. The method is based on an adaptive approach, which includes the following steps : - prior to carrying out the Wavelet transform, defining a categorization 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 categorization map; and - performing the Wavelet transform of the sample image on the basis of the selected Wavelet.