Testing specially adapted to determine the identity or genuineness of paper currency or similar valuable papers

GPHYSICS G07Checking devices G07DHANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLE PAPERS

G07D7/00Testing specially adapted to determine the identity or genuineness of paper currency or similar valuable papers

G07D7/0006Security markings visible to the naked eye G07D7/0013Holograms G07D7/002Watermarks G07D7/0026Barcodes G07D7/0033Checkcodes G07D7/004using digital security elements G07D7/0046Security markings invisible to the naked eye G07D7/0053involving markings added to a pattern G07D7/006involving markings removed from an original pattern G07D7/0066involving markings the properties of which are altered from original properties G07D7/0073involving markings displaced slightly from original positions within a pattern G07D7/008involving markings of altered colours G07D7/0086involving markings which are altered in dimension G07D7/0093Circuits in note G07D7/02using electric means G07D7/023Measuring conductivity by direct contact G07D7/026using capacitive sensors G07D7/04using magnetic means G07D7/06using wave or particle radiation G07D7/08Acoustic waves G07D7/10Microwaves G07D7/12Visible light, infra-red or ultra violet radiation G07D7/121Illumination assembly details G07D7/122Spectral properties G07D7/124Optical security elements G07D7/125Holograms or other interface patterns G07D7/127Watermarks G07D7/128Viewing devices G07D7/14using chemical means G07D7/16Testing the dimensions G07D7/162Length or width G07D7/164Thickness G07D7/166Folds or doubles G07D7/168Position of banknote G07D7/18Testing the stiffness or other mechanical properties G07D7/182Testing stiffness G07D7/185Detecting holes or pores G07D7/187Detecting dirt G07D7/20Testing patterns thereon G07D7/2008preprocessing G07D7/2016feature extraction G07D7/2025Pattern matching G07D7/2033matching unique patterns G07D7/2041matching a statistical distribution G07D7/205matching spectral properties G07D7/2058matching a template G07D7/2066matching with an overlay G07D7/2075setting acceptance levels or parameters G07D7/2083learning G07D7/2091where a plurality of levels are set