CN108074318B - Method and device for identifying paper money - Google Patents
Method and device for identifying paper money Download PDFInfo
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- CN108074318B CN108074318B CN201611020638.7A CN201611020638A CN108074318B CN 108074318 B CN108074318 B CN 108074318B CN 201611020638 A CN201611020638 A CN 201611020638A CN 108074318 B CN108074318 B CN 108074318B
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
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Abstract
The embodiment of the invention discloses a method and a device for identifying paper money. The method comprises the following steps: acquiring magnetic data of a characteristic region of paper money to be detected, wherein the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic stripe region; determining a boundary to be positioned according to the boundary of the crown word size area and the boundary of the hall area; determining the number of magnetic points exceeding the background magnetic numerical value range according to the magnetic data of the to-be-positioned boundary and the magnetic stripe boundary of the magnetic stripe region; and acquiring a positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold value, repositioning the magnetic stripe channel of the paper money to be detected. Therefore, under the condition that the magnetic blocks with the sizes of the RMB and the magnetic strip areas are roughly positioned, the channel where the magnetic strip is located can be accurately positioned, the area selection does not need to be changed and tested for many times, and the magnetic identification rate of the RMB is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of paper money identification, in particular to a method and a device for identifying paper money.
Background
Along with the improvement of the living standard of people, the financial demand is increased, the bank business is enriched, the phenomenon of counterfeiting paper money is inevitable in daily life, the counterfeiting means is improved, and great troubles are caused to the life of people.
At present, counterfeit money is generally identified by a money detector, but the technology of counterfeit paper money is continuously developed, the function updating of the money detector has certain hysteresis, particularly, counterfeit money which newly appears in the market can not be accurately identified, even if people actively identify the counterfeit money, the identification capability of different people for the authenticity of the paper money is different, counterfeit money information can be received by people only by broadcasting through channels such as media, and the counterfeit money can not be accurately and timely identified, so that the market order and the normal life of people are influenced.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for identifying paper money, and aims to improve the accuracy and efficiency of paper money identification.
To achieve the purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a method of identifying a banknote, the method comprising:
acquiring magnetic data of a characteristic region of paper money to be detected, wherein the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic stripe region;
determining a boundary to be positioned according to the boundary of the crown word size area and the boundary of the hall area;
determining the number of magnetic points exceeding the background magnetic numerical value range according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region;
and acquiring a positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold value, repositioning the magnetic stripe channel of the paper money to be detected.
Preferably, the determining a boundary to be positioned according to the boundary of the crown word size region and the boundary of the hall region includes:
and comparing the boundary of the crown word size area with the boundary of the hall area according to the magnetic data to obtain a minimum initial boundary and a maximum end boundary.
Preferably, the number of magnetic points exceeding the background magnetism value range is determined according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region
Acquiring the number of magnetic points exceeding the background magnetism value range between the minimum initial boundary and the initial boundary of the magnetic strip region in each channel of the paper money to be detected;
and acquiring the number of the magnetic points between the maximum ending boundary and the ending boundary of the magnetic strip area, which exceed the background magnetic value range.
Preferably, the acquiring the positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold, repositioning the magnetic stripe channel of the paper money to be detected includes:
and judging the numerical value of the positioning channel with the largest number of the magnetic points, and if the numerical value of the positioning channel is smaller than a first channel threshold value or larger than a second channel threshold value, determining that the magnetic stripe channel is positioned wrongly and needing to reposition the magnetic stripe channel of the paper money.
Preferably, the acquiring the positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold, repositioning the magnetic stripe channel of the paper money to be detected includes:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the left area, and if the data of the positioning channel of the left area is smaller than a first channel threshold value, determining that the hall area is located in the left area of the magnetic image, and the magnetic stripe area of the paper money to be detected is located in the right area of the paper money to be detected;
acquiring data of a positioning channel with the maximum number of magnetic points in the right area;
and if the positioning channel with the maximum number of the magnetic points in the right area is not larger than a second channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the right area is the magnetic stripe channel.
Preferably, the acquiring the positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold, repositioning the magnetic stripe channel of the paper money to be detected includes:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the right area, and if the data of the positioning channel in the right area is greater than a second channel threshold value, determining that the crown word number area is located in the right area of the magnetic image and the magnetic strip area of the paper money to be detected is located in the left area of the paper money to be detected;
acquiring data of a positioning channel with the largest number of magnetic points in the left area;
and if the positioning channel with the maximum number of the magnetic points in the left area is not smaller than a first channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the left area is the magnetic stripe channel.
In a second aspect, an apparatus for recognizing paper money, the apparatus comprising:
the device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring magnetic data of a characteristic region of paper money to be detected, the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic strip region;
the first determining module is used for determining a boundary to be positioned according to the boundary of the crown word number region and the boundary of the hall region;
the second determining module is used for determining the number of the magnetic points exceeding the background magnetism numerical value range according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region;
the second acquisition module is used for acquiring the positioning channel with the largest number of the magnetic points;
and the positioning module is used for repositioning the magnetic stripe channel of the paper money to be detected if the positioning channel exceeds a preset channel threshold value.
Preferably, the first determining module is specifically configured to:
and comparing the boundary of the crown word size area with the boundary of the hall area according to the magnetic data to obtain a minimum initial boundary and a maximum end boundary.
Preferably, the second determining module is specifically configured to:
acquiring the number of magnetic points exceeding the background magnetism value range between the minimum initial boundary and the initial boundary of the magnetic strip region in each channel of the paper money to be detected;
and acquiring the number of the magnetic points between the maximum ending boundary and the ending boundary of the magnetic strip area, which exceed the background magnetic value range.
Preferably, the positioning module is specifically configured to:
and judging the numerical value of the positioning channel with the largest number of the magnetic points, and if the numerical value of the positioning channel is smaller than a first channel threshold value or larger than a second channel threshold value, determining that the magnetic stripe channel is positioned wrongly and needing to reposition the magnetic stripe channel of the paper money.
Preferably, the positioning module is further specifically configured to:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the left area, and if the data of the positioning channel of the left area is smaller than a first channel threshold value, determining that the hall area is located in the left area of the magnetic image, and the magnetic stripe area of the paper money to be detected is located in the right area of the paper money to be detected;
acquiring data of a positioning channel with the maximum number of magnetic points in the right area;
and if the positioning channel with the maximum number of the magnetic points in the right area is not larger than a second channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the right area is the magnetic stripe channel.
Preferably, the positioning module is further specifically configured to:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the right area, and if the data of the positioning channel in the right area is greater than a second channel threshold value, determining that the crown word number area is located in the right area of the magnetic image and the magnetic strip area of the paper money to be detected is located in the left area of the paper money to be detected;
acquiring data of a positioning channel with the largest number of magnetic points in the left area;
and if the positioning channel with the maximum number of the magnetic points in the left area is not smaller than a first channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the left area is the magnetic stripe channel.
The embodiment of the invention provides a method and a device for identifying paper money, which are used for acquiring magnetic data of a characteristic region of paper money to be detected, wherein the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic strip region; determining a boundary to be positioned according to the boundary of the crown word size area and the boundary of the hall area; determining the number of magnetic points exceeding the background magnetic numerical value range according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region; and acquiring a positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold value, repositioning the magnetic stripe channel of the paper money to be detected. Therefore, under the condition that the magnetic blocks with the sizes of the RMB and the magnetic strip areas are roughly positioned, the channel where the magnetic strip is located can be accurately positioned, the area selection does not need to be changed and tested for many times, and the magnetic identification rate of the RMB is improved.
Drawings
FIG. 1 is a schematic flow chart of a method for identifying paper currency according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a banknote to be detected according to an embodiment of the present invention;
fig. 3 is a functional module schematic diagram of an apparatus for identifying paper money according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention. It should be further noted that, for convenience of description, only some structures, not all structures, relating to the embodiments of the present invention are shown in the drawings.
Referring to the drawings, fig. 1 is a schematic flow chart of a method for identifying paper money according to an embodiment of the invention.
As shown in fig. 1, the method of discriminating paper money includes:
step 101, acquiring magnetic data of a characteristic region of paper money to be detected, wherein the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic stripe region;
specifically, the detection of the magnetic stripe characteristics of the RMB is an important basis for the authenticity inspection of the RMB, and the magnetic stripe characteristics can be further detected only after the position of the magnetic stripe is correctly positioned, so that the recognition rate of the RMB is improved. The existing algorithm can correctly position most 2005 edition RMB magnetic stripes, but when the magnetic area of the hall area is large and even exceeds the magnetic stripe area, the magnetic stripes can not be correctly positioned, and the recognition rate is influenced.
102, determining a boundary to be positioned according to the boundary of the crown word size area and the boundary of the hall area;
specifically, as shown in fig. 2, the hall area is large, and the conventional algorithm locates the magnetic stripe in the hall area when the magnetic stripe is located, which results in a final magnetic identification error.
Firstly, roughly positioning a crown word number area and a hall area, and recording the beginning line and ending behaviors of the crown word number area, namely, crown _ start and crown _ end, hall _ start and hall _ end, and line _ start and line _ end of the magnetic stripe;
comparing the sizes of the crown _ start and the hall _ start, and taking the smaller value temp1 of the crown _ start and the hall _ start; the magnitude of crown _ end and hall _ end are compared, and the larger value temp2 is taken.
Preferably, the determining a boundary to be positioned according to the boundary of the crown word size region and the boundary of the hall region includes:
and comparing the boundary of the crown word size area with the boundary of the hall area according to the magnetic data to obtain a minimum initial boundary and a maximum end boundary.
103, determining the number of magnetic points exceeding the background magnetic numerical value range according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region;
specifically, when three magnetic regions are roughly positioned, line _ start is smaller than temp1 and line _ end is larger than temp2, and the number of magnetic dots outside the background range, where the number of rows in each channel (18 channels in total) is between line _ start and temp1, and the number of rows is between temp2 and line _ end, are counted.
Finding out the channel with the largest number of lines between line _ start and temp1 and between temp2 and line _ end, and recording the channel number L; as shown in fig. 2, normally, the number of the magnetic dots of the channel where the magnetic stripe is located beyond the background range is the largest, so that L is the channel where the magnetic stripe is located, but when the magnetic area of the hall is large, the number of the magnetic dots of the hall area beyond the background range is greater than that of the magnetic stripe, and L is not the channel where the magnetic stripe is located, so that the positioning is wrong.
Preferably, the determining, according to the magnetic data of the boundary to be located and the magnetic stripe boundary of the magnetic stripe region, the number of magnetic dots exceeding the background magnetic value range includes:
acquiring the number of magnetic points exceeding the background magnetism value range between the minimum initial boundary and the initial boundary of the magnetic strip region in each channel of the paper money to be detected;
and acquiring the number of the magnetic points between the maximum ending boundary and the ending boundary of the magnetic strip area, which exceed the background magnetic value range.
And 104, acquiring a positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold value, repositioning the magnetic stripe channel of the paper money to be detected.
Specifically, L is judged, and if L is smaller than 5 or larger than 12, it indicates that the magnetic stripe is positioned wrongly and needs to be repositioned. If the magnetic image is divided into two parts with the same left and right areas, then if L is less than 5, it means that the hall area is in the left area of the magnetic image at this time, and L is also located in this area, but in reality the magnetic stripe should be in the right area of the magnetic image at this time. Then the channel L1 with the largest number of magnetic points exceeding the background range in the right area needs to be found again, and L1 is the channel where the magnetic stripe is located; if L is larger than 12, on the contrary, L2, which is the channel with the largest number of magnetic dots in the left area of the image, needs to be searched again, and L2 is the channel where the magnetic stripe is located.
The first method comprises the following steps: the acquiring of the positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold, repositioning the magnetic stripe channel of the paper money to be detected includes:
and judging the numerical value of the positioning channel with the largest number of the magnetic points, and if the numerical value of the positioning channel is smaller than a first channel threshold value or larger than a second channel threshold value, determining that the magnetic stripe channel is positioned wrongly and needing to reposition the magnetic stripe channel of the paper money.
The second method comprises the following steps: the acquiring of the positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold, repositioning the magnetic stripe channel of the paper money to be detected includes:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the left area, and if the data of the positioning channel of the left area is smaller than a first channel threshold value, determining that the hall area is located in the left area of the magnetic image, and the magnetic stripe area of the paper money to be detected is located in the right area of the paper money to be detected;
acquiring data of a positioning channel with the maximum number of magnetic points in the right area;
and if the positioning channel with the maximum number of the magnetic points in the right area is not larger than a second channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the right area is the magnetic stripe channel.
The third method comprises the following steps: the acquiring of the positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold, repositioning the magnetic stripe channel of the paper money to be detected includes:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the right area, and if the data of the positioning channel in the right area is greater than a second channel threshold value, determining that the crown word number area is located in the right area of the magnetic image and the magnetic strip area of the paper money to be detected is located in the left area of the paper money to be detected;
acquiring data of a positioning channel with the largest number of magnetic points in the left area;
and if the positioning channel with the maximum number of the magnetic points in the left area is not smaller than a first channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the left area is the magnetic stripe channel.
The method for identifying the paper money, provided by the embodiment of the invention, comprises the steps of obtaining magnetic data of a characteristic region of the paper money to be detected, wherein the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic strip region; determining a boundary to be positioned according to the boundary of the crown word size area and the boundary of the hall area; determining the number of magnetic points exceeding the background magnetic numerical value range according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region; and acquiring a positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold value, repositioning the magnetic stripe channel of the paper money to be detected. Therefore, under the condition that the magnetic blocks with the sizes of the RMB and the magnetic strip areas are roughly positioned, the channel where the magnetic strip is located can be accurately positioned, the area selection does not need to be changed and tested for many times, and the magnetic identification rate of the RMB is improved.
Referring to fig. 3, fig. 3 is a functional module schematic diagram of an apparatus for identifying paper money according to an embodiment of the present invention.
As shown in fig. 3, the apparatus includes:
the first acquisition module 301 is configured to acquire magnetic data of a feature region of a banknote to be detected, where the magnetic data is used to determine a boundary range of the feature region, and the feature region includes a crown word number region, a hall region, and a magnetic stripe region;
a first determining module 302, configured to determine a boundary to be positioned according to the boundary of the crown word number region and the boundary of the hall region;
preferably, the first determining module 302 is specifically configured to:
and comparing the boundary of the crown word size area with the boundary of the hall area according to the magnetic data to obtain a minimum initial boundary and a maximum end boundary.
A second determining module 303, configured to determine, according to the magnetic data of the boundary to be located and the magnetic stripe boundary of the magnetic stripe region, the number of magnetic points exceeding the background magnetic numerical range;
preferably, the second determining module 303 is specifically configured to:
acquiring the number of magnetic points exceeding the background magnetism value range between the minimum initial boundary and the initial boundary of the magnetic strip region in each channel of the paper money to be detected;
and acquiring the number of the magnetic points between the maximum ending boundary and the ending boundary of the magnetic strip area, which exceed the background magnetic value range.
A second obtaining module 304, configured to obtain a positioning channel with the largest number of magnetic dots;
and the positioning module 305 is configured to reposition the magnetic stripe channel of the to-be-detected banknote if the positioning channel exceeds a preset channel threshold.
Preferably, the positioning module 305 is specifically configured to:
and judging the numerical value of the positioning channel with the largest number of the magnetic points, and if the numerical value of the positioning channel is smaller than a first channel threshold value or larger than a second channel threshold value, determining that the magnetic stripe channel is positioned wrongly and needing to reposition the magnetic stripe channel of the paper money.
Preferably, the positioning module 305 is further specifically configured to:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the left area, and if the data of the positioning channel of the left area is smaller than a first channel threshold value, determining that the hall area is located in the left area of the magnetic image, and the magnetic stripe area of the paper money to be detected is located in the right area of the paper money to be detected;
acquiring data of a positioning channel with the maximum number of magnetic points in the right area;
and if the positioning channel with the maximum number of the magnetic points in the right area is not larger than a second channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the right area is the magnetic stripe channel.
Preferably, the positioning module 305 is further specifically configured to:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the right area, and if the data of the positioning channel in the right area is greater than a second channel threshold value, determining that the crown word number area is located in the right area of the magnetic image and the magnetic strip area of the paper money to be detected is located in the left area of the paper money to be detected;
acquiring data of a positioning channel with the largest number of magnetic points in the left area;
and if the positioning channel with the maximum number of the magnetic points in the left area is not smaller than a first channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the left area is the magnetic stripe channel.
The device for identifying the paper money obtains the magnetic data of the characteristic region of the paper money to be detected, wherein the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic strip region; determining a boundary to be positioned according to the boundary of the crown word size area and the boundary of the hall area; determining the number of magnetic points exceeding the background magnetic numerical value range according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region; and acquiring a positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold value, repositioning the magnetic stripe channel of the paper money to be detected. Therefore, under the condition that the magnetic blocks with the sizes of the RMB and the magnetic strip areas are roughly positioned, the channel where the magnetic strip is located can be accurately positioned, the area selection does not need to be changed and tested for many times, and the magnetic identification rate of the RMB is improved.
The technical principle of the embodiment of the present invention is described above in conjunction with the specific embodiments. The description is only intended to explain the principles of embodiments of the invention and should not be taken in any way as limiting the scope of the embodiments of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.
Claims (8)
1. A method of identifying a banknote, the method comprising:
acquiring magnetic data of a characteristic region of paper money to be detected, wherein the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic stripe region;
determining a boundary to be positioned, wherein the boundary to be positioned comprises a minimum initial boundary and a maximum end boundary which are obtained by comparing the boundary of the crown word number area with the boundary of the hall area;
determining the number of magnetic points exceeding a background magnetic numerical value range according to the magnetic data of the boundary to be positioned and the magnetic strip boundary of the magnetic strip region, wherein the number of the magnetic points exceeding the background magnetic numerical value range between the minimum initial boundary and the initial boundary of the magnetic strip region in each channel of the paper money to be detected is obtained, and the number of the magnetic points exceeding the background magnetic numerical value range between the maximum end boundary and the end boundary of the magnetic strip region is obtained;
and acquiring a positioning channel with the largest number of magnetic points, and if the positioning channel exceeds a preset channel threshold value, repositioning the magnetic stripe channel of the paper money to be detected.
2. The method according to claim 1, wherein the obtaining of the positioning channel with the largest number of magnetic dots and the repositioning of the magnetic stripe channel of the banknote to be detected if the positioning channel exceeds a preset channel threshold comprises:
and judging the numerical value of the positioning channel with the largest number of the magnetic points, and if the numerical value of the positioning channel is smaller than a first channel threshold value or larger than a second channel threshold value, determining that the magnetic stripe channel is positioned wrongly and needing to reposition the magnetic stripe channel of the paper money.
3. The method according to claim 1, wherein the obtaining of the positioning channel with the largest number of magnetic dots and the repositioning of the magnetic stripe channel of the banknote to be detected if the positioning channel exceeds a preset channel threshold comprises:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the left area, and if the data of the positioning channel of the left area is smaller than a first channel threshold value, determining that the hall area is located in the left area of the magnetic image, and the magnetic stripe area of the paper money to be detected is located in the right area of the paper money to be detected;
acquiring data of a positioning channel with the maximum number of magnetic points in the right area;
and if the positioning channel with the maximum number of the magnetic points in the right area is not larger than a second channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the right area is the magnetic stripe channel.
4. The method according to claim 1, wherein the obtaining of the positioning channel with the largest number of magnetic dots and the repositioning of the magnetic stripe channel of the banknote to be detected if the positioning channel exceeds a preset channel threshold comprises:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the right area, and if the data of the positioning channel in the right area is greater than a second channel threshold value, determining that the crown word number area is located in the right area of the magnetic image and the magnetic strip area of the paper money to be detected is located in the left area of the paper money to be detected;
acquiring data of a positioning channel with the largest number of magnetic points in the left area;
and if the positioning channel with the maximum number of the magnetic points in the left area is not smaller than a first channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the left area is the magnetic stripe channel.
5. An apparatus for recognizing paper money, characterized by comprising:
the device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring magnetic data of a characteristic region of paper money to be detected, the magnetic data is used for determining the boundary range of the characteristic region, and the characteristic region comprises a crown word number region, a hall region and a magnetic strip region;
the first determining module is used for determining a boundary to be positioned, wherein the boundary to be positioned comprises a minimum initial boundary and a maximum end boundary which are obtained by comparing the boundary of the crown word area with the boundary of the hall area;
the second determining module is used for determining the number of magnetic points exceeding a background magnetic numerical range according to the magnetic data of the boundary to be positioned and the magnetic stripe boundary of the magnetic stripe region, and comprises the steps of acquiring the number of the magnetic points exceeding the background magnetic numerical range between the minimum initial boundary and the initial boundary of the magnetic stripe region in each channel of the paper money to be detected, and acquiring the number of the magnetic points exceeding the background magnetic numerical range between the maximum end boundary and the end boundary of the magnetic stripe region;
the second acquisition module is used for acquiring the positioning channel with the largest number of the magnetic points;
and the positioning module is used for repositioning the magnetic stripe channel of the paper money to be detected if the positioning channel exceeds a preset channel threshold value.
6. The apparatus of claim 5, wherein the positioning module is specifically configured to:
and judging the numerical value of the positioning channel with the largest number of the magnetic points, and if the numerical value of the positioning channel is smaller than a first channel threshold value or larger than a second channel threshold value, determining that the magnetic stripe channel is positioned wrongly and needing to reposition the magnetic stripe channel of the paper money.
7. The apparatus of claim 5, wherein the positioning module is further specifically configured to:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the left area, and if the data of the positioning channel of the left area is smaller than a first channel threshold value, determining that the hall area is located in the left area of the magnetic image, and the magnetic stripe area of the paper money to be detected is located in the right area of the paper money to be detected;
acquiring data of a positioning channel with the maximum number of magnetic points in the right area;
and if the positioning channel with the maximum number of the magnetic points in the right area is not larger than a second channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the right area is the magnetic stripe channel.
8. The apparatus of claim 5, wherein the positioning module is further specifically configured to:
dividing the magnetic image of the paper money to be detected into two parts with the same left and right areas;
acquiring data of a positioning channel with the largest number of magnetic points in the right area, and if the data of the positioning channel in the right area is greater than a second channel threshold value, determining that the crown word number area is located in the right area of the magnetic image and the magnetic strip area of the paper money to be detected is located in the left area of the paper money to be detected;
acquiring data of a positioning channel with the largest number of magnetic points in the left area;
and if the positioning channel with the maximum number of the magnetic points in the left area is not smaller than a first channel threshold value, determining that the positioning channel with the maximum number of the magnetic points in the left area is the magnetic stripe channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611020638.7A CN108074318B (en) | 2016-11-17 | 2016-11-17 | Method and device for identifying paper money |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611020638.7A CN108074318B (en) | 2016-11-17 | 2016-11-17 | Method and device for identifying paper money |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108074318A CN108074318A (en) | 2018-05-25 |
| CN108074318B true CN108074318B (en) | 2020-03-27 |
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