Patent Document ID: 9984288
Application ID: 14749724
Patent Status: 1

Claim One:
1. Identity document digital image correction method which corrects a digital image of a presented identity document acquired with an imaging device of a first kind using an authentic reference identity document acquired with an imaging device of a second kind, comprising the steps of: identifying the type, class and issue of a presented identity document from a plurality of features in a digital image thereof; retrieving from a reference identity document repository, information about a reference authentic version of an identity document of the same type, class and issue as the presented identity document; allowing a user to select two features in the digital image of the presented identity document; calculating the distance between the two selected features; determining from the information retrieved about the reference authentic version of the identity document, the distance between corresponding features in the reference authentic version of the identity document; calculating a scaling factor γ x, y from the ratio of the distance between the two selected features in the presented identity document and the distance between corresponding features in the reference authentic version of the identity document; correcting one or more measurements of features in the digital image of the presented identity document by applying the scaling factor thereto wherein: the corrected one or more measurements of features in the digital image of the presented identity document are compared with corresponding measurements of features in the authentic reference identity document and results of this comparison are used to assess the authenticity of the presented identity document.