A banknote authentication method and system based on double crown font size

Abstract

A paper money authenticity identification technique, being, in particular, a paper money authenticity identification method which performs self-verification by means of a unique double prefix number of paper money and a system for implementing the method; first, a paper money image signal is acquired; then, image pre-processing is carried out, comprising bilinear interpolation and binarization; then, characters are divided equally into four regions, black dot percent is counted respectively, and similarity comparison of horizontal and vertical black dot percent is carried out; X-direction and Y-direction projection is carried out horizontally and vertically respectively, and projection energy is counted; lastly, by combining the similarity of black dot percent and the similarity of projection energy, final determination of coupling degree is performed to determine whether or not horizontal and vertical characters are consistent, thereby identification of counterfeit paper money is effectively carried out. The accuracy of the present method is high, while algorithm implementation is simple and the amount of computation is light, thus the present invention is suitable for embedded financial machinery and may effectively improve the authenticity identification performance of financial machinery.

Description

technical field [0001] The invention relates to a banknote identification technology, in particular to a banknote identification method and a system for realizing the method by performing self-verification through the unique double crown number of the banknote. Background technique [0002] As a value symbol and a value exchange medium, currency plays an irreplaceable and important role in the commodity economy. Currency plays a role in regulating, promoting and stabilizing the national economy. [0003] In recent years, China's economy has continued to develop rapidly and healthily, social wealth has been rapidly accumulated, and the phenomenon of counterfeit money has also spread rapidly. The circulation of counterfeit money has affected the laws of the market, disturbed the social and economic order, and damaged the reputation of a country's currency and the interests of the public. Therefore, all countries in the world list counterfeit currency as the object of collecti...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problem of slow processing speed caused by the large amount of calculation in the prior art, the present invention provides a method of extracting and comparing the character image features of the horizontal and vertical serial numbers to confirm whether the horizontal and vertical serial numbers are consistent, thereby confirming Whether it is coinage or not, this method does not require OCR extraction and comparison of characters, which can effectively solve the problem of unrecognizable horizontal and vertical font size uniform string changes, and at the same time greatly improve the processing efficiency of the algorithm on the premise of ensuring the accuracy of authenticity.

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