Method and device for detecting overlapped bank note

Abstract

The invention relates to a method for detecting overlapped bank notes. The method comprises the following steps: step 10, acquiring original image data of bank notes; step 20, performing safety line positioning detection on original image data of the bank notes, so as to obtain safety line detection data; step 40, judging whether the safety line detection data meet a preset safety line reference condition or not, if the safety line detection data meet the preset safety line reference condition, performing the step 60, otherwise, performing the step 70; step 60, obtaining the judgment result that the bank notes are not overlapped, and ending the process; and step 70, obtaining the judgment result that the bank notes are overlapped, and ending the process. As the thickness of the part with the safety line of a bank note of most countries is far greater than those of other areas, different treatment on the thicknesses of safety line areas and other areas of bank notes, and overlapping judgment can be achieved through safety line detection and positioning of the bank notes, the problem that misjudgment on overlapped bank notes caused by the extremely thick safety lines is avoided, and not only are the overlapped bank notes accurately detected, but also the receiving rate of the bank notes is greatly increased.

Description

technical field

[0001] The invention relates to banknote identification technology, in particular to a method and device for detecting heavy banknotes. Background technique

[0002] In the cash transaction device, it is necessary to continuously receive or output banknotes, especially the automatic teller machine (ATM), which has become one of the important means for people to obtain cash, and needs to identify and detect banknotes. However, due to the influence of the external environment and the different attributes of the banknotes, banknotes often overlap together, that is, double banknotes. If it is not possible to accurately detect whether the banknotes are double banknotes, account disputes will occur, leading to serious consequences.

[0003] At present, the most commonly used method for detecting whether a banknote is heavy is to use the thickness of the banknote to detect whether the banknote is heavy, such as using an ultrasonic sensor to detect the thickness of t...

Images