An auxiliary design method for a short-side banknote magnetic feature authentication module

Abstract

This invention discloses an auxiliary design method for a short-side banknote magnetic feature authentication module, comprising: scanning along the vertical direction of the short side of the banknote to obtain a magnetic image of the banknote; setting the detection width, number of channels, and sensitivity of the target magnetic feature sensor; obtaining data from the banknote magnetic image, processing the data, and simulating the data parameter magnetic feature sensor scanning signal; performing morphological dilation calculation on the banknote magnetic image to calculate the data parameter magnetic feature sensor scanning image; selecting a scanning position to simulate multi-mode magnetic feature sensor scanning signals, and selecting a suitable signal to complete the auxiliary design. This method displays the banknote magnetic image and the simulated magnetic feature sensor scanning image, allowing selection of a suitable scanning position on both the displayed banknote magnetic image and the simulated magnetic feature sensor scanning image; simultaneously, based on the selected position, it outputs three sets of signals for expert reference, ultimately confirming suitability and completing the auxiliary design.

Description

Technical Field

[0001] This invention relates to the field of banknote authentication technology, and in particular to an auxiliary design method for a short-edge banknote magnetic feature authentication module. Background Technology

[0002] With the continuous development of magnetic sensor technology, magnetic image sensors have been successfully developed and are beginning to be applied in the field of banknote authentication. Magnetic image sensors, in conjunction with a uniform-speed paper feed device, can detect the complex magnetic distribution on banknotes and convert it into a magnetic image, thus enabling quantitative authentication of banknotes based on their magnetic characteristics. Therefore, quantitative analysis and authentication of the magnetic distribution on banknotes using magnetic images has significant research value and great application potential in the field of counterfeit detection. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this invention is to provide an auxiliary design method for a short-side banknote magnetic feature authentication module.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] An auxiliary design method for a short-edge banknote magnetic feature authentication module includes:

[0006] A scans along the short side of the banknote perpendicularly to obtain a magnetic image of the banknote;

[0007] B sets the detection width, number of channels, and sensitivity of the target magnetic feature sensor;

[0008] C obtains data from the magnetic image of the banknote, processes the data, and simulates the data parameters and magnetic feature sensor scanning signal;

[0009] D performs morphological dilation calculations on the magnetic image of the banknote to calculate the data parameters of the magnetic feature sensor scan image;

[0010] E selects the scanning position to simulate the scanning signal of the magnetic feature sensor in multiple modes, and selects an appropriate signal to complete the auxiliary design.

[0011] Compared with the prior art, one or more embodiments of the present invention may have the following advantages:

[0012] This method displays the magnetic image of the banknote and the simulated magnetic feature sensor scan image. A suitable scanning position can be selected on the displayed magnetic image of the banknote and the simulated magnetic feature sensor scan image. At the same time, based on the selected position, three sets of signals are output to experts for reference, and the suitability is finally confirmed, thus completing the auxiliary design. Attached Figure Description

[0013] Figure 1This is a flowchart of the auxiliary design method for the short-side banknote magnetic feature authentication module;

[0014] Figure 2 It is a magnetic image of a banknote;

[0015] Figure 3 It is a simulated image of a banknote scanned by a magnetic signature sensor;

[0016] Figure 4 This is the magnetic feature signal curve of the 40th row of the banknote's magnetic image;

[0017] Figure 5 It is the magnetic feature signal curve scanned by the simulated magnetic feature sensor at the 40th row position;

[0018] Figure 6 This is the magnetic feature signal curve in the 40th row of the simulated magnetic feature sensor scan image. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the embodiments and accompanying drawings.

[0020] In the auxiliary design method for the short-side banknote magnetic feature authentication module provided in this embodiment, the detection width B of the magnetic image sensor is set as follows: image 54mm; Number of channels (pixels) C image : 216; Sensitivity S image 60dB.

[0021] Detection width B of the target magnetic feature sensor sensor 60mm, number of channels C sensor :6; Sensitivity 50dB.

[0022] like Figure 1 As shown, the auxiliary design method for the short-side banknote magnetic feature authentication module includes:

[0023] Banknote A is fed along its short side, and a magnetic image sensor is used to scan it along the direction perpendicular to the short side to obtain a magnetic image of the banknote (e.g., ...). Figure 2 (as shown);

[0024] Both magnetic image sensors and magnetic feature sensors are directional. Different banknote insertion methods correspond to different scanning methods, and the obtained magnetic images and magnetic feature signals are different.

[0025] The magnetic image sensor scans along the vertical direction of the short side, and the angular error must be controlled within ±5°.

[0026] The magnetic image sensor detects width B image 54mm; Number of channels (pixels) C image: 216; Sensitivity S image 60dB.

[0027] B sets the detection width, number of channels, and sensitivity of the target magnetic feature sensor;

[0028] Detection width B of the target magnetic feature sensor sensor 60mm, number of channels C sensor :6, generally consistent with products on the market (TMR6206).

[0029] Sensitivity S of magnetic feature sensor sensor (Magnification) can be adjusted through factory settings; 60dB is used for normal shipments.

[0030] C acquires data from the magnetic image of the banknote, processes it, and simulates the scanning signal of the magnetic feature sensor with the specified parameters; it then performs a dedicated morphological dilation calculation on the magnetic image of the banknote to calculate the scanning image of the magnetic feature sensor with the specified parameters.

[0031] Data is acquired from the magnetic image of the banknote, processed, and the scanning signal of the magnetic feature sensor for that parameter is simulated.

[0032] Specifically: the magnetic image of the banknote is denoted as I, with the shorter side as the height and the longer side as the length. mag (Determinant) Then the number of rows in the image is equal to the number of channels (pixels) of the magnetic image sensor C. image There are a total of C image Let I be the total number of pixels in the nth row of the image. mag (n,:).

[0033] The process of acquiring, processing, and simulating the magnetic feature sensor scanning signal for this parameter is as follows: Calculate the number of rows N to be acquired. acq :

[0034]

[0035] Then when the simulated magnetic feature sensor is in the Nth... pos Magnetic feature signal X of line position scanning sensor At that time, there were:

[0036]

[0037] The element E in the morphological expansion is N. acq ×N acq Matrix. N acq The number of rows needs to be obtained, which is calculated by equation (1).

[0038]

[0039] Simulated magnetic feature sensor scan image Isensor_sim

[0040]

[0041] The simulated magnetic signature sensor scan image of a banknote is shown below. Figure 3 .

[0042] D. Select a location to simulate the scanning signal of the magnetic feature sensor in multiple modes, select an appropriate signal, and complete the auxiliary design.

[0043] The magnetic image of the banknote will be displayed. mag Simulated magnetic feature sensor scanning image I sensor_sim .(See Figure 2 , Figure 3 )

[0044] Simultaneously, based on the selected position N... pos The line outputs three sets of signals, namely:

[0045] (1) Nth magnetic image of banknote pos Magnetic characteristic signal I mag (n,:); see Figure 4 .

[0046] (2) Simulated magnetic feature sensor at the Nth pos Magnetic feature signal X of line position scanning sensor ;See Figure 5 .

[0047] (3) Simulated magnetic feature sensor scan image I sensor_sim Nth pos Magnetic characteristic signal I sensor_sim (n,:). See Figure 6 .

[0048] Then the magnetic image of the banknote can be displayed. mag Simulated magnetic feature sensor scanning image I sensor_sim Select a suitable scanning position; and based on 3 sets of signals (including 2 sets of analog values), confirm whether it is suitable and complete the auxiliary design.

[0049] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. An auxiliary design method for a short-side banknote magnetic feature authentication module, characterized in that, The method includes: A scans along the short side of the banknote perpendicularly to obtain a magnetic image of the banknote; B sets the detection width, number of channels, and sensitivity of the target magnetic feature sensor; C obtains data from the magnetic image of the banknote, processes the data, and simulates the scanning signal of the target magnetic feature sensor; D performs morphological dilation calculations on the magnetic image of the banknote to calculate the target magnetic feature sensor scan image; E selects the scanning position to simulate the scanning signal of the magnetic feature sensor in multiple modes, and selects an appropriate signal to complete the auxiliary design.

2. The auxiliary design method for the short-side banknote magnetic feature authentication module according to claim 1, characterized in that, In step A, the banknote is fed along the short side, and a magnetic image sensor scans along the vertical direction of the short side; the magnetic image sensor scans along the vertical direction of the short side, and the angle error is controlled within ±5°. The detection width of the magnetic image sensor is B. image The number of channels is C image Sensitivity is S image .

3. The auxiliary design method for the short-side banknote magnetic feature authentication module according to claim 1, characterized in that, In B, the detection width of the target magnetic feature sensor is B. sensor The number of channels is C sensor Sensitivity is S sensor .

4. The auxiliary design method for the short-side banknote magnetic feature authentication module according to claim 3, characterized in that, The C includes: The magnetic image of a banknote is denoted as I, with the shorter side as the height and the longer side as the length. mag Then the number of rows in the image is equal to the number of channels C of the magnetic image sensor. image There are a total of C image Row; Let I be the total number of pixels in the nth row of the image. mag (n,:), then the simulated data parameters of the magnetic feature sensor scanning signal include: Calculate the number of rows N that need to be retrieved. acq : Then when the simulated magnetic feature sensor is in the Nth... pos Magnetic feature signal X of line position scanning sensor At that time, there were: The B image For the detection width of the magnetic image sensor, S image This refers to the sensitivity of the magnetic image sensor.

5. The auxiliary design method for the short-side banknote magnetic feature authentication module according to claim 1, characterized in that, The D includes: The element E of morphological expansion is N acq ×N acq Matrix, N acq The number of rows needs to be obtained, which is calculated using equation (1). Simulated magnetic feature sensor scan image I sensor_sim Among them, S sensor For the sensitivity of the target magnetic feature sensor, S image This refers to the sensitivity of the magnetic image sensor.

6. The auxiliary design method for the short-side banknote magnetic feature authentication module according to claim 5, characterized in that, The E includes: The magnetic image of the banknote will be displayed. mag Simulated magnetic feature sensor scanning image I sensor_sim At the same time, based on the selected position Nth pos The line outputs three sets of signals, namely: (1) Nth magnetic image of banknote pos Magnetic characteristic signal I mag (n,:); (2) Simulated magnetic feature sensor at the Nth pos Magnetic feature signal X of line position scanning sensor ; (3) Simulated magnetic feature sensor scan image I sensor_sim Nth pos Magnetic characteristic signal I sensor_sim (n,:); Then the magnetic image of the banknote can be displayed. mag Simulated magnetic feature sensor scanning image I sensor_sim Select a suitable scanning position; and based on the three sets of signals, confirm whether it is suitable to complete the auxiliary design.

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