公开(公告)号：US20160012658A1

公开(公告)日：2016-01-14

申请号：US14764061

申请日：2014-02-04

Applicant: KBA-NOTASYS SA

Inventor： Volker LOHWEG ,  Jan Leif HOFFMANN ,  Helene DÖRKSEN ,  Roland HILDEBRAND ,  Eugen GILLICH ,  Jürg HOFMANN ,  Johannes Georg SCHAEDE

IPC: G07D7/20 ,  G06K9/22 ,  G06T7/00 ,  G06K9/00 ,  G06K9/48

CPC classification number: G07D7/20 ,  G06K9/00442 ,  G06K9/00516 ,  G06K9/22 ,  G06K9/48 ,  G06K2009/488 ,  G06T7/0002 ,  G06T7/168 ,  G06T2207/20064 ,  G06T2207/30176 ,  G07D7/003 ,  G07D7/2016

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.

Abstract translation: 基于通过凹版印刷产生的特征的分析，验证安全文件和移动设备，特别是智能手机的方法，其被编程为执行该方法，该分析涉及要认证的候选文档的样本图像的分解 基于小波，通过执行样本图像的小波变换来对每个样本图像进行数字处理，以便导出一组分类特征。 该方法基于自适应方法，其包括以下步骤：在执行小波变换之前，定义包含有关安全文档上找到的不同凹版线结构的本地信息的分类图; - 根据分类图在小波类别池中进行小波选择; 并且基于所选择的小波执行样本图像的小波变换。