Patent · US Active

Method for checking a value document

US9582953B2 · kind B2 · utility

1Cited by

5References

16Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Johannes Feulner · Erlangen, DE
Jan Domke · Vaterstetten, DE
Norbert Holl · Germering, DE

Key dates

Filing date	Sep 11, 2014
Grant date	Feb 28, 2017
Priority date	—
Expiry date	Sep 11, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG07D2207/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method is described for checking a value document, wherein measuring values of the value document are detected in spatially resolved fashion. The measuring value detected in the respective measuring point is allocated to a node corresponding to this measuring point, and a two-dimensional network of nodes is formed therefrom. A network is formed from the two-dimensional network of the nodes and a source node and a sink node. By means of the maximally possible flow through the network, the value document is classified as suspected of forgery or not suspected of forgery. The maximally possible flow through the network is a measure for the degree of probability of the value document having a continuous object along a direction transverse to the direction of the network, said object indicating a manipulation of the value document, such as e.g. an adhesive strip or a separating line of a composed forgery.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.