Method and Apparatus for Detecting a Security Thread in a Value Document

摘要

A method is described for detecting a security thread in a value document, in which magnetic data are employed for sites on the value document, said magnetic data representing a magnetic property of the value document at the site, check sites on the value document are determined employing the sites, and from the check sites, a straight line is specified, along or on which at least some of the check sites lie and which represents a location of the security thread.