A method and system for detecting banknotes

A maximum value, pixel technology, applied in character and pattern recognition, computer parts, calculations, etc., to save calculation time, reduce calculation amount, reduce calculation difficulty and error rate
CN104778778BActive Publication Date: 2017-12-08SHENZHEN YIHUA COMP +2
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN YIHUA COMP
Publication Date
2017-12-08

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Abstract

The invention relates to a money checking method and system. The method comprises the following steps: converting a UV image of paper money into a binary image; inquiring a maximum value position column I in binary image column projection, and substituting first pixels in the maximum value position column I with second pixels; circularly inquiring a maximum value position column II in the binary image column projection within a preset inquiring frequency threshold value, and substituting first pixels in the maximum value position column II with second pixels if the quantity of the first pixels is greater than a quantity threshold value, wherein the maximum value position column I is a position column with the projection in a magnetic safety line set zone line being a maximum value; the maximum value position column II is a position column with the projection within preset zones on the two sides of the maximum value position column I being a maximum value. By locking possible zones of a magnetic safety line, the system reduces calculated amount, reduces calculation difficulty and the error rate, solves the problem of the interference of splicing traces, and improves the accuracy.
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Description

technical field

[0001] The invention belongs to the field of banknote processing, and in particular relates to a banknote checking method and system. Background technique

[0002] In the existing technology, ultraviolet (UV) identification is carried out on banknotes, because splicing marks will appear when the banknotes are damaged, and the position of the magnetic security thread of the banknotes is often not fixed. The width of the security line is also inconsistent. The above factors will affect the banknote recognition. Moreover, it cannot be shielded directly with a template. Usually, the UV image is converted into a binary image. Each pixel in the binary image is either a black pixel or a white pixel. It is an image with no intermediate transition in the gray value. Since the magnetic security thread will appear as white pixels, but the splicing traces in the banknotes will also appear as white pixels. Therefore, it will cause trouble to remove the magnetic security t...

Claims

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