METHOD AND DEVICE FOR THE CHARACTERIZATION OF THE STATE OF USE OF BANK TICKETS, AND ITS CLASSIFICATION IN APTOS AND NOT SUITABLE FOR CIRCULATION

摘要

A method and device for characterising the state of use of banknotes and their classification as fit and unfit for circulation, which avoids errors in said classification, thus preventing unfit notes from being put back into circulation, and fit notes from being mistakenly and prematurely destroyed. The method comprises capturing (1) at least one image of at least one of the face of a note to be analysed and analysing (4) the captured image in the spatial domain. Furthermore, the captured image is analysed (5) in the frequency domain and both analyses (4, 5) are combined (13), via a mathematical algorithm, in order to obtain a single value referred to as FV. Lastly, the FV is compared (15) to a fixed FV threshold (14) and depending on whether said calculated FV is lower or higher than the FV threshold, the note is classified as fit or unfit for circulation.