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Detection method, device and equipment for safety line magnetic features

A detection method and security thread technology, applied in the field of anti-counterfeiting, can solve the problem of reducing the detection accuracy of the magnetic feature of the security thread and the like, and achieve the effect of improving the accuracy

Active Publication Date: 2017-09-05
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the peak or trough is a sharp peak, as long as the maximum or minimum value of the waveform is found, it is the peak or valley, but the magnetic printing characteristics of some banknotes show that the peak and trough have a certain width , at this time, relying solely on the maximum and minimum values ​​of the peak and valley to judge will reduce the accuracy of the magnetic feature detection of the safety thread

Method used

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  • Detection method, device and equipment for safety line magnetic features
  • Detection method, device and equipment for safety line magnetic features
  • Detection method, device and equipment for safety line magnetic features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] figure 1 This is a flow chart of a method for detecting the magnetic features of a security thread provided in the first embodiment of the present invention. This embodiment may be suitable for detecting the magnetic features of a banknote security thread, such as figure 1 As shown, the method specifically includes the following steps:

[0057] Step 110: Acquire start position information and end position information of each characteristic area in the target magnetic waveform, where the characteristic area is a peak area or a valley area.

[0058] Wherein, the magnetic waveform may be a waveform corresponding to the magnetic characteristics of the banknote security thread. The characteristic area can be a wave crest area or a wave trough area. The magnetic waveform of the security line of a banknote contains multiple characteristic areas. For example, the 2005 version of the 100 RMB security line magnetic waveform chart contains 16 wave crests and 16 wave valleys. In this em...

Embodiment 2

[0073] image 3 This is a flowchart of a method for detecting magnetic features of a safety thread provided in the second embodiment of the present invention, based on the above-mentioned embodiment, such as image 3 As shown, step 110 can be implemented in the following manner:

[0074] Step 210: If the characteristic area is a peak area, obtain the position of the pixel with the largest amplitude in each peak area as the first peak position.

[0075] In the crest area, the amplitude shows a trend of gradually increasing first and then gradually decreasing. When processing the magnetic information data corresponding to the security thread, if a segment of data shows the characteristics of gradually increasing first and then gradually decreasing, the corresponding area of ​​the data is the peak area. Find the abscissa corresponding to the pixel with the largest amplitude in this piece of data, and use the abscissa as the first peak position of the peak area. In the same way, for t...

Embodiment 3

[0084] Figure 4 This is a flowchart of a method for detecting magnetic features of a safety thread provided in the third embodiment of the present invention, based on the above-mentioned embodiment, such as Figure 4 As shown, step 110 can also be implemented in the following manner:

[0085] Step 310: If the characteristic area is a peak area, obtain the position of the pixel with the largest amplitude in each peak area as the first peak position.

[0086] In the crest area, the amplitude shows a trend of gradually increasing first and then gradually decreasing. When processing the magnetic information data corresponding to the security thread, if a segment of data shows the characteristics of gradually increasing first and then gradually decreasing, the corresponding area of ​​the data is the peak area. Find the abscissa corresponding to the pixel with the largest amplitude in this piece of data, and use the abscissa as the first peak position of the peak area. In the same way,...

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Abstract

The embodiment of the invention discloses a detection method, device and equipment for safety line magnetic features. The method comprises the steps: obtaining the start position information and end position information of each feature region in a target magnetic waveform, wherein the feature region is a peak region or a valley region; determining the central position information corresponding to each feature region according to the start position information and end position information of each feature region; calculating the interval between the adjacent feature regions according to the central position information corresponding to each feature region; carrying out the matching of the calculated interval between the adjacent feature regions with the standard interval, and obtaining a matching result. The method provided by the invention can improve the detection of magnetic features of a safety line of paper money.

Description

Technical field [0001] The embodiment of the present invention relates to the field of anti-counterfeiting technology, and in particular to a method, device and equipment for detecting the magnetic characteristics of a security thread of banknotes. Background technique [0002] The security thread of banknotes is an important basis for verifying the authenticity of banknotes. The magnetic feature detection of the security thread affects the recognition rate of the entire banknote. [0003] The amplitude waveform of the magnetic characteristic of the banknote security thread has certain characteristics, and the distance between adjacent wave crests or the distance between adjacent wave troughs is fixed. When detecting the distance between the peak and the peak or the distance between the valley and the valley, it is necessary to determine the position of the peak or valley. In general, the peak or trough is a sharp peak. As long as you find the maximum or minimum value of the wavef...

Claims

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Application Information

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IPC IPC(8): G07D7/04
CPCG07D7/04
Inventor 薛敏
Owner SHENZHEN YIHUA COMP