Paper currency authentic identification method and device based on magnetic images

Abstract

The invention discloses a paper currency authentic identification method and device based on magnetic images. Magnetic images of paper currency obtained by a magnetic image sensor are processed, after image enhancement processing, tilt correction pre-processing and the like are carried out on the magnetic images, a magnetic image histogram is calculated, binarization processing is carried out, two binaryzation magnetic images of safety lines are cut out, horizontal projection is carried out on the two cut binaryzation magnetic images, whether the features of impulse waveforms of the horizontal projection curve of the two binaryzation magnetic images of the safety lines conform to set regulations is judged, and the paper currency is judged to be real currency if all the features conform to the set regulations. According to the method and device, due to the fact that a high threshold value and a low threshold value are adopted for carrying out binaryzation on the magnetic images, the binaryzation magnetic images of safety lines are cut out, the features of the two binaryzation magnetic images of safety lines are recognized, and the paper currency is judged to be the real currency if all the features conform to the set regulations.

Description

technical field [0001] The invention relates to the field of counterfeit banknote identification, in particular to a method and device for identifying counterfeit banknotes based on magnetic images. Background technique [0002] The anti-counterfeiting of banknotes is an important issue related to the financial stability of the country, and is closely related to the property safety of the people. As the core product of bank self-service, ATM machine provides people with 24-hour transfer, withdrawal and deposit services, which not only saves a lot of labor costs for banks, but also facilitates people's lives. With the advancement of science and technology, the anti-counterfeiting technology of RMB is becoming more and more advanced, and there are more and more anti-counterfeiting points on banknotes, but the counterfeiting methods that follow are getting more and more sophisticated, and the degree of simulation is getting higher and higher. ATM is used as a 24-hour For self-...

AI Technical Summary

Problems solved by technology

The magnetic detection on banknotes uses a magnetic sensor, also known as a magnetic head. At present, financial machines such as banknote counters and ATM machines use such sensors. Several magnetic heads are discretely distributed in the counterfeiting channel of banknotes. , each magnetic head induces a one-dimensional magnetic signal waveform, which can detect the magnetic code on the security line of the RMB, but its disadvantage is that the detection accuracy is not high, and the detection reliability needs to be improved

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