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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

Active Publication Date: 2017-12-08
SHENZHEN YIHUA COMP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a banknote verification method and system, aiming to solve the problem in the prior art that the interference of splicing traces cannot be avoided and the magnetic security thread of banknotes can be effectively removed

Method used

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  • A method and system for detecting banknotes
  • A method and system for detecting banknotes
  • A method and system for detecting banknotes

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] figure 1 It shows the implementation flow chart of the banknote verification method provided by the embodiment of the present invention, and the process of the method is described in detail as follows:

[0020] In step S101, the UV image of the banknote is converted into a binary image, and the binary image includes first pixels and / or second pixels.

[0021] In this embodiment, the UV image is an image recognized by the sensor after the banknote is irradiated by ultraviolet rays (UV), and the binary image is a digital image with only two pixel values ​​for each pixel, and the pixel value h...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/20
Inventor 黄勃
Owner SHENZHEN YIHUA COMP
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