Multi-spectral recognition device and multi-spectral recognition method for banknotes

Abstract

The embodiment of the invention provides a multi-spectral recognition device for banknotes, which is used for acquiring images of a banknote in each optical spectrum section, comparing the images with preset conditions and improving the recognition accuracy. The technical scheme is that the multi-spectral recognition device for banknotes provided by the embodiment of the invention comprises a wide field imaging module, a wavelength adjusting module, a photoelectric detection module and an identification module; the wide field imaging module is used for acquiring a reflection image of the banknote to be detected; the wavelength adjusting module is used for extracting n reflection sub-images of the reflection image under n optical spectrum sections, wherein the n is a natural number which is greater than 2; the photoelectric detection module is used for carrying out photoelectric signal conversion on the n reflection sub-images, and acquiring n converted images corresponding to the n reflection sub-images; and the identification module is used for recognizing the authenticity of the banknote to be detected through the n converted images.

Description

technical field [0001] Embodiments of the present invention relate to a non-contact optical detection technology, and in particular to a banknote multispectral recognition device and method. Background technique [0002] Optical color-changing ink, referred to as light-changing ink, is currently mostly used on banknotes to make counterfeit money easy to identify. Observing from different angles, the ink will show different colors, thus ensuring that the color will not be copied. For the first time, my country used optical color-changing ink as an anti-counterfeiting feature on the new version of RMB 100 and 50. [0003] The optical color-changing ink identification device in the prior art includes a frame, a lens, and two light sources with different light-emitting angles on both sides of the lens. The spectral information of the light reflected by the color-changing ink is different, and the electrical signals converted from different spectral information are also differen...

AI Technical Summary

Problems solved by technology

[0004] The defect of the prior art is that the recognition device of the optical color-changing ink cannot compare the images of each spectral segment of the banknote, and the recognition accuracy is poor.

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