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Spliced banknote detection method

A detection method and banknote technology, which is applied in the field of image processing, can solve problems such as immature technology, and achieve the effects of avoiding transaction disputes, improving the anti-counterfeiting means of banknote detectors, and increasing the detection rate

Inactive Publication Date: 2016-03-30
EASTERN COMM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the detection of real banknotes and real banknotes, that is, splicing banknotes are spliced ​​by two (or more) different genuine coins, the technology is not very mature

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as figure 1 In the described embodiment, a method for detecting spliced ​​banknotes, the specific operation steps are as follows:

[0026] (1) When banknotes pass through the banknote detector, since the stitching signal is sensitive to transmitted light, the acquisition module of the banknote detector is turned on to collect the transmitted image. After the banknote image is collected, the image is rotated and corrected, and the banknote image processing basic algorithm of the banknote detector is started to calculate the currency value, orientation, version, coordinates of the four corners of the banknote, the position of the magnetic strip and other basic information of the banknote.

[0027] (2) According to the basic information obtained in step (1), locate the region to be detected, mainly to shield the influence of the magn...

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Abstract

The invention discloses a spliced banknote detection method. The method specifically comprises the steps of acquiring the image of a banknote, rotating and correcting the image of the banknote so as to further recognize the basic information; based on the obtained basic information, positioning a to-be-detected region; figuring out the gradient graph of the positioned region through the sub-sampling process, and measuring a step signal at the spliced part of the banknote based on the sum of first norms at various differential dimensions; selecting an image-binary threshold for the gradient graph and conducting the binarization treatment through selecting a hard threshold; converting the Hough transformation on the binarized image of the gradient graph in the form of polar coordinates; conducting the straight line detection: in the Hough space, searching out all maximum values, wherein the number of maximum values represents the number of linear abnormal signals in the original image space and the values of the maximum values represent the lengths of the linear abnormal signals in the original image space. According to the technical scheme of the invention, various spliced banknotes can be effectively detected, and the anti-counterfeiting means of a money detector is improved. Meanwhile, the detection efficiency of a bill sorting machine is improved. The method can be applied to the detection of various weak straight line signals.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for detecting spliced ​​banknotes. Background technique [0002] At present, for the banknote detector module of the all-in-one recycling machine, there are mainly functions such as counterfeit identification, clearing, serial number identification, and abnormal data storage. Spliced ​​banknotes are artificially connecting two banknotes into one banknote through technical processing. Spliced ​​banknotes are divided into three categories according to the splicing methods of genuine and counterfeit banknotes: counterfeit banknotes combined with counterfeit banknotes, counterfeit banknotes combined with genuine banknotes, and genuine banknotes combined with genuine banknotes. The detection of spliced ​​banknotes is a difficult point encountered by sorting machines and ATM machines, especially for the detection of real banknotes spliced ​​with real banknotes. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07D7/20
CPCG07D7/2016G07D7/2008
Inventor 牛振山
Owner EASTERN COMM
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