Banknote authenticity identification method based on hyperspectral imaging

Abstract

The invention belongs to the technical field of banknote identification, and discloses a banknote authenticity identification method based on hyperspectral imaging. The method comprises the followingsteps: A, adjusting the integral time of an instrument; B, placing a banknote to be identified on a bearing table; C, setting parameters of the hyperspectral imager; D, performing push-broom imaging on one surface of the banknote to form a three-dimensional spectral image; E, repeating steps B to D to complete acquisition of the three-dimensional spectral image of the other side of the banknote; F, converting the DN values of the three-dimensional spectral images of the front and back surfaces of the banknote into spectral reflectance values to obtain a spectral reflectance curve; and G, performing spectral analysis. By analyzing the difference between the hyperspectral reflectance of the genuine currency and the hyperspectral reflectance of the counterfeit currency of different versions in the visible near-infrared spectral range and applying the technical means of spectral operation, principal component analysis and the like, the difference between the genuine currency and the counterfeit currency and the difference between the counterfeit currency of different versions and different sources are rapidly explored.

Description

technical field [0001] The invention belongs to the technical field of banknote identification, and in particular relates to a method for identifying authenticity of banknotes based on hyperspectral imaging. Background technique [0002] With the rapid development of my country's national economy, China, as the world's second largest economy, has a higher and higher share of Renminbi in international payments. However, more and more high-quality imitation renminbi appear in the field of circulation, seriously threatening the financial security of our country and endangering the domestic social order. Therefore, speeding up the identification and research of the authenticity of RMB is an important technical guarantee to ensure my country's financial security and maintain the status of RMB in the international financial market. The traditional identification of the authenticity of RMB is generally carried out through the method of "one look, two touches, three listens, and fo...

AI Technical Summary

Problems solved by technology

[0004] Although experts and scholars have done a lot of research on the identification of genuine and counterfeit banknotes, there is no use of visible and near-infrared imaging hyperspectral to identify genuine and counterfeit banknotes, especially for the front and back of multiple versions of the same version of RMB. Analysis

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