Counterfeit detection in bright environment

Abstract

The invention describes a method () for counterfeit detection using a portable device () with installed counterfeit detection application, to a data carrier () comprising this counterfeit detection application, to the portable device () used in this method and to a cover () comprising guiding structures to perform this method comprising the steps of taking multiple overlapping pictures () from at least a portion of the object () with the camera () of the portable device () positioned in front of the object () during relatively moving (RM) the portable device with respect to and () along the object (); combining () all taken pictures to a single combined image of at least the portion of the object () with increased resolution by the counterfeit detection application () executed on the portable device (); applying image processing () to the combined image by the counterfeit detection application () providing an improved image with improved properties compared to the combined image to order to visualize or enhance the hidden features of the object () comprising an increased contrast in the infrared and/or ultraviolet wavelength range being transmitted by the adapted band pass filter (); and comparing () the improved image with the visualized or enhanced hidden features of the object () with a reference image of the object () comprising the hidden features by the counterfeit detection application () to provide () an authentication result for the performed counterfeit detection.