CN106504409A - A kind of detection method of bank note magnetic security line and device - Google Patents
A kind of detection method of bank note magnetic security line and device Download PDFInfo
- Publication number
- CN106504409A CN106504409A CN201611021963.5A CN201611021963A CN106504409A CN 106504409 A CN106504409 A CN 106504409A CN 201611021963 A CN201611021963 A CN 201611021963A CN 106504409 A CN106504409 A CN 106504409A
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- Prior art keywords
- bank note
- magnetic security
- security line
- information
- coordinate
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Classifications
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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
- G07D7/20—Testing patterns thereon
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of detection method of bank note magnetic security line and device, the method includes：Obtain the infrared transmission image of bank note；The characteristic information in magnetic security line region in the infrared transmission image is extracted, the characteristic information includes the row eigenvalue and row eigenvalue in the magnetic security line region；According to the coordinate that the statistical value of the row eigenvalue and row eigenvalue and the threshold value of the magnetic security line of the bank note determine the magnetic security line.Based on said method and device, ensure that identification is stable with locating effect, and error is little, take short.
Description
Technical field
The present embodiments relate to bill handling field, more particularly to a kind of detection side of bank note magnetic security line and dress
Put.
Background technology
At present, in the process of circulation of bank note safety line either in location feature, or false proof in all play most heavy
The role for wanting, in addition in the 2015 version people 100 yuan increased a safety line, further improve RMB anti-counterfeiting performance.
It can be said that the positioning of safety line and detection, are that the first step in RMB false distinguishing is also a most important step.
In prior art, the magnetic line localization method of bank note is mainly to magnetic image denoising and its gradient image is carried out
Binaryzation, to binaryzation after gradient image carry out the Primary Location that floor projection obtains magnetic security line image, to preliminary fixed
The safety line magnetic image that position is extracted further carries out angle of inclination and corrects to carry out safety line fine positioning extraction, is carried according to fine positioning
The magnetic image of the safety line for taking, upright projection go out its signature waveform, the classification for carrying out magnetic security line to this feature.
Said method carries out binaryzation equivalent to an image has been traveled through due to magnetic line region, takes more.Identification is special
Levy in the characteristic area identification magnetic line feature for navigating to, calculate not enough also succinctly, while unavoidably using various in feature
, therefore there is the pixel value error that sensor causes in the non-standardization of the external conditions such as temperature in the threshold value related to gray value
Situation, exist refuse sincere.
Content of the invention
The present invention provides a kind of detection side of bank note magnetic security line and device, to realize the quick of bank note magnetic security line
And be accurately positioned.
For reaching this purpose, the embodiment of the present invention is employed the following technical solutions：A kind of detection side of bank note magnetic security line
Method, including：Obtain the infrared transmission image of bank note；Extract the feature letter in magnetic security line region in the infrared transmission image
Breath, the characteristic information include the row eigenvalue and row eigenvalue in the magnetic security line region；According to the row eigenvalue and
The threshold value of the statistical value of row eigenvalue and the magnetic security line of the bank note determines the coordinate of the magnetic security line.
Further, methods described, also included before the infrared transmission image of bank note is obtained：Obtain the public letter of bank note
Breath, the public information include the version information of the bank note, the width information of the pixel of the bank note, the picture of the bank note
The positional information in magnetic security line region in the elevation information of vegetarian refreshments and the bank note.
Further, in said method, the feature letter for extracting magnetic security line region in the infrared transmission image
Breath includes：The position of width information, the elevation information of the pixel and magnetic security line region according to the pixel
Information determines statistical regions；Choose in the statistical regions per most dark pixel point range coordinate in a line, obtain most dark pixel point range
Coordinate set.
Further, in said method, the statistical value according to the row eigenvalue and row eigenvalue and the bank note
The threshold value of magnetic security line determine that the coordinate of the magnetic security line includes：According to the version information of the bank note determines
The live width of magnetic security line；Live width according to the magnetic security line determines the row coordinate range of corresponding most dark pixel point；Root
According to the most dark pixel point in most dark pixel point range coordinate set described in row coordinate range selection, selected most dark pixel point
Number more than or equal to the bank note the corresponding threshold value of version, then the row coordinate range is the seat of the magnetic security line
Mark.
Further, in said method, the corresponding threshold value is equal to the most dark picture of the most dark pixel point range coordinate set
Number * 0.9 of vegetarian refreshments.
Correspondingly, the embodiment of the present invention is also disclosed a kind of detection means of bank note magnetic security line, including：Image obtains mould
Block, for obtaining the infrared transmission image of bank note；Characteristic extracting module, for extracting magnetic security in the infrared transmission image
The characteristic information in line region, the characteristic information include the row eigenvalue and row eigenvalue in the magnetic security line region；Safety
Line coordinates determining module, for the statistical value according to the row eigenvalue and row eigenvalue and the magnetic security line of the bank note
Threshold value determines the coordinate of the magnetic security line.
Further, described device, also includes：Public information acquisition module, in the infrared transmission figure for obtaining bank note
As obtaining the public information of bank note before, the public information includes the version information of the bank note, the pixel of the bank note
Width information, in the elevation information of the pixel of the bank note and the bank note magnetic security line region positional information.
Further, in said apparatus, the characteristic extracting module includes：Statistical regions determining unit, for according to institute
The positional information for stating the width information, the elevation information of the pixel and magnetic security line region of pixel determines Statistical Area
Domain；Most dark pixel point chooses unit, for choosing in the statistical regions per most dark pixel point range coordinate in a line, obtains most dark
Pixel point range coordinate set.
Further, in said apparatus, the safe line coordinates determining module includes：Live width determining unit, for basis
The version information of the bank note determines the live width of the magnetic security line；Scope determining unit, for according to the magnetic security
The live width of line determines the row coordinate range of corresponding most dark pixel point；Coordinate determining unit, for according to the row coordinate range
Most dark pixel point in most dark pixel point range coordinate set described in choosing, the number of selected most dark pixel point are more than or equal to institute
The corresponding threshold value of version of bank note is stated, then the row coordinate range is the coordinate of the magnetic security line.
Further, in said apparatus, the corresponding threshold value is equal to the most dark picture of the most dark pixel point range coordinate set
Number * 0.9 of vegetarian refreshments.
The technical scheme provided by the embodiment of the present invention, in the detection positioning application of bank note magnetic security line, by basis
Infrared transmission light magnetic safety line is black characteristic, using the infrared transmission figure of bank note, extracts wherein most dark pixel point feature
The comparison with threshold value is carried out, so that it is determined that the coordinate of magnetic security line.The real technical scheme for being provided of the invention, ensure that knowledge
Unstable with locating effect, and error is little, takes short.
Description of the drawings
Fig. 1 is a kind of schematic flow sheet of bank note magnetic security line detecting method that the embodiment of the present invention one is provided；
Fig. 2 is a kind of structural representation of bank note magnetic security line detector that the embodiment of the present invention two is provided.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment that states is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure is illustrate only in description, accompanying drawing.
Embodiment one
Accompanying drawing 1 is referred to, is a kind of flow process of the detection method of bank note magnetic security line that the embodiment of the present invention one is provided
Schematic diagram, the method are applied to the scene of positioning bank note magnetic security line, detection means of the method by bank note magnetic security line
To execute, the device can be realized by software and/or hardware, be integrated in terminal inner.The method specifically includes following steps：
S110, the infrared transmission image for obtaining bank note.
It should be noted that detection method is to make use of magnetic security line the reason for being identified using infrared transmission figure
Be black characteristic under infrared transmission light, not by bank note towards or incline affected, it is ensured that identification and locating effect steady
Fixed.
Optionally, before the infrared perspective image of bank note is obtained, can also include：Obtain the public information of bank note, institute
Stating public information includes the version information of the bank note, the width information of the pixel of the bank note, the pixel of the bank note
Elevation information and the bank note in magnetic security line region positional information.
S120, the characteristic information for extracting magnetic security line region in the infrared perspective image, the characteristic information include
The row eigenvalue and row eigenvalue in the magnetic security line region.
Wherein, the characteristic information for extracting magnetic security line region in the infrared perspective image includes：
The position of width information, the elevation information of the pixel and magnetic security line region according to the pixel
Information determines statistical regions；
Choose in the statistical regions per most dark pixel point range coordinate in a line, obtain most dark pixel point range coordinate set.
Specifically, due to being identified by using infrared transmission figure, so the infrared transmission figure of gained bank note is easy
There is the situation of black surround, in this step, determine that the method taken by statistical regions is pacified with reference to magnetic according to the width and height of pixel
The positional information in all fronts region, clips marginal area, i.e., the region of black surround easily occurs, it is to avoid image black surround paper feeding coin magnetic
The mistake that safety line detection and localization is brought is surveyed.
It should be noted that most dark pixel point refers to the minimum pixel of brightness value, only spot on bank note etc.,
Not so this most dark pixel point determines and is located on magnetic security line, the most dark pixel point set for therefore obtaining i.e. magnetic security
Pixel point set in line.
Specifically, choose in this step in the statistical regions per most dark pixel point range coordinate in a line, preferably may be used also
To be that detection row in the statistical regions is chosen in sampling, but it should be noted that detection row that this sampling is chosen must have can
By property and representativeness, can for example be on, in, lower each sampling identical detect row in right amount.
S130, the statistical value according to the row eigenvalue and row eigenvalue are true with the threshold value of the magnetic security line of the bank note
The coordinate of the fixed magnetic security line.
Wherein, the threshold of the statistical value according to the row eigenvalue and row eigenvalue and the magnetic security line of the bank note
Value determines that the coordinate of the magnetic security line includes：
Version information according to the bank note determines the live width of the magnetic security line；
Live width according to the magnetic security line determines the row coordinate range of corresponding most dark pixel point；
Most dark pixel point in most dark pixel point range coordinate set according to the row coordinate range is chosen, selected
The number of most dark pixel point is pacified for the magnetic more than or equal to the corresponding threshold value of the version of the bank note, then the row coordinate range
The coordinate of all fronts.
It should be noted that the safety line live width of the bank note of each version is discrepant, therefore bank note magnetic is being carried out
Property safety line detection and localization before obtain bank note public information in bank note version information just can be according to specific live width feature as inspection
Survey condition completes the detection of magnetic security line.
Specifically, RMB：1999 editions 6 pixels are wide, 2005 editions 10 pixel width, and 2015 editions have two safety lines, point
Wei 6 pixels be wide and 15 pixel width.The detection method expansibility of the present embodiment is strong, and for such as version, such as 2015 editions have
The situation of two safety lines, it is only necessary to carry out safety line detection twice.
It should be noted that the corresponding threshold value is equal to the individual of the most dark pixel point of the most dark pixel point range coordinate set
Number * 0.9.This threshold value is relocatable, is the most dark picture for allowing to cause because of the spot on bank note the reasons why given threshold
The most dark pixel point of wrong selection in vegetarian refreshments row coordinate set, that is, the pixel in spot rather than on magnetic security line that falls
Point.Therefore, just can to exclude the detection that such exopathogenic factor brings wrong for given threshold.And various and gray scale in the present embodiment, is not used
, therefore there are no the feelings of the pixel value error that sensor causes in the non-standardization of the external conditions such as temperature in the related threshold value of value yet
Condition.
For the scheme implementation process for representing the embodiment of the present invention for becoming apparent from, carried out in detail with an instantiation below
Introduce.Exemplary, table 1 is most dark pixel point range coordinate and number Statistics table during paper currency detection.
Bank note is 1999 editions, and safety line live width is 6 pixel width, and 60 row of detection behavior of selection, most dark pixel point range are sat
Mark number is 60, and collection is combined into 118-125.
Table 1：Most dark pixel point range coordinate and number Statistics table during paper currency detection
| Row coordinate | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 |
| Number | 11 | 10 | 8 | 9 | 11 | 9 | 1 | 1 |
According to live width condition, 6 pixel width, determine the row coordinate range of corresponding most dark pixel point, for example, can be
In 118-123 this 6 row coordinates, this row coordinate range, most dark pixel point number summation is 11+10+8+9+11+9=58, threshold value
For pixel number 60*0.9=54,58 are more than 54, and therefore the wide row coordinate 118-123 of above-mentioned 6 live widths pacifies for the magnetic
The coordinate of all fronts.
In sum, the embodiment of the present invention one discloses a kind of bank note magnetic security line detecting method, pacifies in bank note magnetic
Completely in the application of detection positioning, by being black characteristic according to infrared transmission light magnetic safety line, using the infrared of bank note
Figure is penetrated, extraction wherein most dark pixel point feature carries out the comparison with threshold value, so that it is determined that the coordinate of magnetic security line.Of the invention real
The technical scheme provided by example is applied, be ensure that identification is stable with locating effect, and error is little, take short.
Embodiment two
Accompanying drawing 2 is referred to, is that a kind of structure of bank note magnetic security line detector that the embodiment of the present invention two is provided is shown
It is intended to, the device is specifically comprising such as lower module：
Image collection module 210, for obtaining the infrared transmission image of bank note.
Characteristic extracting module 220, for extracting the characteristic information in magnetic security line region in the infrared transmission image, institute
Stating characteristic information includes the row eigenvalue and row eigenvalue in the magnetic security line region.
Safe line coordinates determining module 230, for the statistical value according to the row eigenvalue and row eigenvalue and the paper
The threshold value of the magnetic security line of coin determines the coordinate of the magnetic security line.
Preferably, described device also includes：Public information acquisition module, for obtain bank note infrared transmission image it
The front public information for obtaining bank note, the public information include the version information of the bank note, the width of the pixel of the bank note
The positional information in magnetic security line region in degree information, the elevation information of the pixel of the bank note and the bank note.
Preferably, described device includes：Statistical regions determining unit, for the width information according to the pixel, institute
The positional information of the elevation information and magnetic security line region of stating pixel determines statistical regions；Most dark pixel point is chosen single
Unit, for choosing in the statistical regions per most dark pixel point range coordinate in a line, obtains most dark pixel point range coordinate set.
Preferably, described device includes：Live width determining unit, for determining the magnetic according to the version information of the bank note
The live width of property safety line；Scope determining unit, for determining corresponding most dark pixel point according to the live width of the magnetic security line
Row coordinate range；Coordinate determining unit, for most dark pixel point range coordinate set according to row coordinate range selection
In most dark pixel point, the number of selected most dark pixel point more than or equal to the corresponding threshold value of the version of the bank note, then institute
State the coordinate that row coordinate range is the magnetic security line.
Infrared transmission image of the present embodiment by acquisition bank note；Extract magnetic security line area in the infrared transmission image
The characteristic information in domain, the characteristic information include the row eigenvalue and row eigenvalue in the magnetic security line region；According to described
The threshold value of the statistical value of row eigenvalue and row eigenvalue and the magnetic security line of the bank note determines the seat of the magnetic security line
Mark.Based on said method and device, ensure that identification is stable with locating effect, and error is little, take short.
The said goods can perform the method provided by any embodiment of the present invention, possess the corresponding functional module of execution method
And beneficial effect.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although the present invention is carried out by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of detection method of bank note magnetic security line, it is characterised in that include：
Obtain the infrared transmission image of bank note；
The characteristic information in magnetic security line region in the infrared transmission image is extracted, the characteristic information includes the magnetic peace
The row eigenvalue and row eigenvalue in all fronts region；
Statistical value according to the row eigenvalue and row eigenvalue determines the magnetic with the threshold value of the magnetic security line of the bank note
The coordinate of property safety line.
2. method according to claim 1, it is characterised in that also included before the infrared transmission image of bank note is obtained：
The public information of bank note is obtained, the public information includes the version information of the bank note, the pixel of the bank note
The positional information in magnetic security line region in width information, the elevation information of the pixel of the bank note and the bank note.
3. method according to claim 2, it is characterised in that magnetic security line in the extraction infrared transmission image
The characteristic information in region includes：
The positional information of width information, the elevation information of the pixel and magnetic security line region according to the pixel
Determine statistical regions；
Choose in the statistical regions per most dark pixel point range coordinate in a line, obtain most dark pixel point range coordinate set.
4. method according to claim 3, it is characterised in that described according to the row eigenvalue and the statistics of row eigenvalue
With the threshold value of the magnetic security line of the bank note, value determines that the coordinate of the magnetic security line includes：
Version information according to the bank note determines the live width of the magnetic security line；
Live width according to the magnetic security line determines the row coordinate range of corresponding most dark pixel point；
Most dark pixel point in most dark pixel point range coordinate set according to the row coordinate range is chosen, selected is most dark
The number of pixel is the magnetic security line more than or equal to the corresponding threshold value of the version of the bank note, then the row coordinate range
Coordinate.
5. method according to claim 4, it is characterised in that the corresponding threshold value is equal to the most dark pixel point range coordinate
Number * 0.9 of the most dark pixel point of set.
6. a kind of detection means of bank note magnetic security line, it is characterised in that include：
Image collection module, for obtaining the infrared transmission image of bank note；
Characteristic extracting module, for extracting the characteristic information in magnetic security line region in the infrared transmission image, the feature
Information includes the row eigenvalue and row eigenvalue in the magnetic security line region；
Safe line coordinates determining module, for the magnetic of the statistical value according to the row eigenvalue and row eigenvalue and the bank note
The threshold value of safety line determines the coordinate of the magnetic security line.
7. device according to claim 6, it is characterised in that also include：
Public information acquisition module, for obtaining the public information of bank note before the infrared transmission image of bank note is obtained, described
Public information includes the version information of the bank note, the width information of the pixel of the bank note, the pixel of the bank note
The positional information in magnetic security line region in elevation information and the bank note.
8. device according to claim 7, it is characterised in that the characteristic extracting module includes：
Statistical regions determining unit, for the width information according to the pixel, the elevation information of the pixel and magnetic
The positional information in property safety line region determines statistical regions；
Most dark pixel point chooses unit, for choosing in the statistical regions per most dark pixel point range coordinate in a line, obtains most
Dark pixel point range coordinate set.
9. device according to claim 8, it is characterised in that the safe line coordinates determining module includes：
Live width determining unit, for determining the live width of the magnetic security line according to the version information of the bank note；
Scope determining unit, for determining the row coordinate model of corresponding most dark pixel point according to the live width of the magnetic security line
Enclose；
Coordinate determining unit, for the most dark picture in most dark pixel point range coordinate set according to row coordinate range selection
Vegetarian refreshments, the number of selected most dark pixel point more than or equal to the corresponding threshold value of the version of the bank note, then the row coordinate model
Enclose the coordinate for the magnetic security line.
10. device according to claim 9, it is characterised in that the corresponding threshold value is equal to the most dark pixel point range and sits
Number * 0.9 of the most dark pixel point of mark set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611021963.5A CN106504409B (en) | 2016-11-16 | 2016-11-16 | A kind of detection method and device of bank note magnetic security line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611021963.5A CN106504409B (en) | 2016-11-16 | 2016-11-16 | A kind of detection method and device of bank note magnetic security line |
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| CN106504409A true CN106504409A (en) | 2017-03-15 |
| CN106504409B CN106504409B (en) | 2019-07-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106934914A (en) * | 2017-03-17 | 2017-07-07 | 深圳怡化电脑股份有限公司 | The method and device of guiding against false of paper currency detection |
| CN111915792A (en) * | 2020-05-19 | 2020-11-10 | 武汉卓目科技有限公司 | Method and device for identifying zebra crossing image-text |
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| CN104298989A (en) * | 2014-08-20 | 2015-01-21 | 深圳大学 | Counterfeit identifying method and counterfeit identifying system based on zebra crossing infrared image characteristics |
| CN105427448A (en) * | 2015-10-29 | 2016-03-23 | 深圳怡化电脑股份有限公司 | Method and device of obtaining banknote security thread boundary |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104298989A (en) * | 2014-08-20 | 2015-01-21 | 深圳大学 | Counterfeit identifying method and counterfeit identifying system based on zebra crossing infrared image characteristics |
| CN105427448A (en) * | 2015-10-29 | 2016-03-23 | 深圳怡化电脑股份有限公司 | Method and device of obtaining banknote security thread boundary |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106934914A (en) * | 2017-03-17 | 2017-07-07 | 深圳怡化电脑股份有限公司 | The method and device of guiding against false of paper currency detection |
| CN106934914B (en) * | 2017-03-17 | 2020-03-27 | 深圳怡化电脑股份有限公司 | Method and device for anti-counterfeiting detection of paper money |
| CN111915792A (en) * | 2020-05-19 | 2020-11-10 | 武汉卓目科技有限公司 | Method and device for identifying zebra crossing image-text |
| CN111915792B (en) * | 2020-05-19 | 2022-06-07 | 武汉卓目科技有限公司 | Method and device for identifying zebra crossing image-text |
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