Paper currency face value identification method and device based on magnetic image

Abstract

The invention discloses a paper currency face value identification method and device based on a magnetic image. The paper currency face value identification method comprises the following steps: laterally magnifying the magnetic image by multiple times, carrying out contrast stretching, high-low threshold binaryzation, safety line and magnetic code image positioning section by section and safety line and magnetic code cutting, drawing a safety line and magnetic code horizontal projection curve, identifying the face value of paper currency according to the safety line and magnetic code curve rule, identifying four directions of the paper currency according to the position of a magnetic signal of a crown character code, identifying the version of the paper currency according to whether magnetic ink exists, verifying the face value direction, and the like. According to the paper currency face value identification method and device, a safety line and magnetic code image is cut by adopting a sectional positioning method and is further verified by using the face value of the paper currency, which is identified by utilizing the safety line and magnetic code projection curve rule, and the face value direction identified by other identification measures, so that the face value direction error probability of the paper currency is greatly reduced, relatively high face value direction rate is achieved and the paper currency processing level of financial self-service equipment is improved.

Description

technical field [0001] The invention relates to the field of banknote pattern recognition, in particular to a method and device for recognizing the face value of banknotes based on a magnetic image. The identification method and device are applicable to all banknotes containing magnetic information, such as dollars, euros, renminbi and the like. Background technique [0002] The People's Bank of China has issued five sets of RMB, and the fourth and fifth sets of RMB are currently in circulation. The denominations of the fourth set of RMB banknotes are 1 yuan, 2 yuan, 5 yuan, 10 yuan, 50 yuan and 100 yuan respectively, and the denominations of the fifth set of RMB banknotes are 1 yuan, 5 yuan, 10 yuan, 20 yuan, 50 yuan and 100 yuan respectively. 100 yuan. At present, financial self-service equipment needs to realize the identification of each set, each face value and orientation of banknotes. The identification technology of banknote sets and face value is currently a very ...

AI Technical Summary

Problems solved by technology

[0007] The early low-end financial equipment points and banknote detectors commonly used magnetic sensors (magnetic heads) to collect the security line magnetic code signal of banknotes to identify the fifth set of RMB face value. The signal is a one-dimensional waveform, and the banknote face value For classification, the effect of denomination recognition is relatively stable, but its disadvantage is that the horizontal resolution of the magnetic signal on the collected banknotes is relatively low, and the adaptability of magnetic detection is not strong. Different currency types need to replace and install different numbers of magnetic sensors. In order to meet the requirements of face value-oriented identification and counterfeiting

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