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A method and device for detecting old and new banknotes

A banknote, old and new technology, applied in the field of new and old banknote detection, can solve the problems of uneven sensor quality, different collection results, difficult sensor quality consistency, etc., to achieve the effect of accurate division and accurate grades of old and new banknotes

Active Publication Date: 2019-03-12
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing technology divides the new and old banknotes based on the image processing of the sensor. However, in actual operation, the quality of the sensor is uneven due to the difference in the manufacturer, model, service life and damage of the instrument, resulting in different sensor acquisitions. The same banknote, collection results are different
The existing technology is difficult to ensure the consistency of the quality of the sensor, thus affecting the accuracy of distinguishing old and new banknotes

Method used

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  • A method and device for detecting old and new banknotes
  • A method and device for detecting old and new banknotes
  • A method and device for detecting old and new banknotes

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] figure 1 It is a flow chart of a method for detecting new and old banknotes provided by Embodiment 1 of the present invention. This embodiment is applicable to ATM machines, banknote sorting machines and all detection machines with the function of detecting new and old banknotes. The banknotes to be detected can be new and old versions of banknotes , such as the old and new versions of RMB. Specifically include the following steps:

[0049] S110. Collect the pixel gray value of the set standard area in the banknote to be tested, so as to determine the standard value.

[0050] The standard setting area is the area where the gray value of the banknote is relatively uniform, and is less affected by the old and new, and the gray value does not change much. Optionally, the standard area set in collecting banknotes to be tested is selected as the white watermark area.

[0051] Specifically, in the banknote area to be tested, the pixel gray value of the white watermark area...

Embodiment 2

[0059] Embodiment 2 is based on Embodiment 1. Compared with the previous embodiment, the difference is that the pixel gray value of the standard area is optimized to the maximum pixel gray value of the standard area, and each pixel in the comparison area of ​​Embodiment 1 is The gray value of the points is optimized to be the average gray value of the pixels in the comparison area. Combine below figure 2 The new and old banknote detection method provided in the second embodiment will be described. The method in the present embodiment includes the following steps:

[0060] S210. Collect the pixel gray value of the set standard area in the banknote to be tested, so as to determine the standard value.

[0061] S220. Collect the maximum pixel gray value in the set standard area of ​​the banknote to be tested as the standard value.

[0062] Specifically, taking the 2005 version of RMB with a denomination of 100 yuan as an example, the standard area of ​​the banknote to be tested i...

Embodiment 3

[0094] Figure 5 A schematic structural diagram of a banknote old and new detection device according to Embodiment 3 of the present invention is shown. The new and old banknote detection device includes: a standard value collection unit 510, a characteristic value collection unit 520, and a grade analysis unit 530, and each module will be described in detail below.

[0095] The standard value collection unit 510 is used to collect the pixel gray value of the set standard area in the banknote to be tested, so as to determine the standard value;

[0096] The characteristic value collection unit 520 is used to collect the pixel gray value of the set comparison area of ​​the banknote to be tested, so as to determine the characteristic value;

[0097] The grade analysis unit 530 is configured to calculate a ratio between the feature value and the standard value, and compare the ratio with a ratio threshold value to obtain the old and new grades of the banknotes to be tested.

[0...

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Abstract

The embodiment of the invention discloses a method and an apparatus fordetecting the old and new banknote. The method comprises the steps of collecting the pixel gray value of the standard area in the test paper to determine the standard value; collecting the pixel gray value of the matching area of the test paper to determine the characteristic value; calculating the ratio between the characteristic value and the standard value and comparing the ratio and the ratio threshold value to get the old and new grades of the banknote to be tested. The technical solution of the apparatus can possibly eliminate the influence to the old and new banknote in the detection due to the introduction of the sensor itself, thereby improving the accuracy of detecting the old and new grades banknote.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of banknote inspection, and in particular to a method and device for detecting old and new banknotes. Background technique [0002] In 2004, the People's Bank of China implemented the new regulations of "Critical Criteria for Renminbi Unsuitable for Circulation", which shows that the quality of cash negotiable notes has attracted the attention of relevant departments. [0003] In the prior art method for detecting old and new banknotes, image sensors are generally used to acquire sample banknote image information of different old and new grades, the image information at a certain fixed position is selected as a standard comparison area, and the pixel value of the standard comparison area is obtained as a standard value ; Obtain the image information of the banknote to be tested, select the same area corresponding to the standard comparison area, and collect the pixel value; finally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/005G07D7/206
Inventor 李杰
Owner SHENZHEN YIHUA COMP
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