Paper currency identification method and device based on optically-variable hollowed windowing security line

Abstract

The invention discloses a paper currency identification method based on an optically-variable hollowed windowing security line. The method comprises following steps of S1: processing a paper currency image so as to obtain an image of an optically-variable hollowed windowing security line; S2: processing the image of the security image so as to obtain smooth sine and cosine waveforms corresponding to the paper currency image; and S3: according to the smooth sine and cosine waveforms of the paper currency image, carrying out true and false identification. The invention also discloses a paper currency identification device based on the optically-variable hollowed windowing security line. According to the invention, by taking advantages of the periodicity of the optically-variable hollowed windowing security line, and calculating numbers of wave peaks and wave troughs of curves after the optically-variable hollowed windowing security line is transformed, the optically-variable hollowed windowing security line can be precisely analyzed and identification results can be obtained. The method and the device can be also used for worn optically-variable hollowed windowing security lines, so identification ability for paper currency is greatly improved. The method and the device can be widely applied to paper currency identification field.

Description

technical field [0001] The invention relates to the field of counterfeiting banknotes, in particular to a method and device for counterfeiting banknotes based on an optically variable hollow window security thread. Background technique [0002] With the continuous development of the society, the continuous growth of the economy, and the increasing circulation of RMB, more and more high-simulation counterfeit banknotes appear in the field of circulation. Among the high-simulation counterfeit banknotes reported, those starting with HD90 and HB90 serial numbers Counterfeit money, which has realistic invisible denominations, ultraviolet features, watermarks, optically variable inks, and magnetic features, can pass the detection of financial instruments such as banknote detectors, which seriously threatens the country's financial security. In order to better protect people's interests, it is necessary to continuously improve the anti-counterfeiting technology and printing quality...

AI Technical Summary

Problems solved by technology

[0004] The existing banknote authentication method of window security thread only judges the authenticity according to whether the window security thread is detected. Although the steps of this identification method are simple, the accuracy is not high and error-prone

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