CN107305716A - A kind of banknote discriminating method and device - Google Patents
A kind of banknote discriminating method and device Download PDFInfo
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- CN107305716A CN107305716A CN201610245603.7A CN201610245603A CN107305716A CN 107305716 A CN107305716 A CN 107305716A CN 201610245603 A CN201610245603 A CN 201610245603A CN 107305716 A CN107305716 A CN 107305716A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000003384 imaging method Methods 0.000 claims abstract description 7
- 238000012850 discrimination method Methods 0.000 claims abstract description 4
- 230000000295 complement effect Effects 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
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- 229910044991 metal oxide Inorganic materials 0.000 claims 1
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- 238000005516 engineering process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000007645 offset printing Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000007639 printing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000002594 fluoroscopy Methods 0.000 description 2
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- 238000007689 inspection Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
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- 238000011524 similarity measure Methods 0.000 description 1
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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
- G07D7/2008—Testing patterns thereon using pre-processing, e.g. de-blurring, averaging, normalisation or rotation
-
- 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
- G07D7/2016—Testing patterns thereon using feature extraction, e.g. segmentation, edge detection or Hough-transformation
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- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The invention discloses a kind of paper money discrimination method and device, the image of anti-counterfeiting mark on bank note is obtained using transmitted light, is identified by the image to acquired anti-counterfeiting mark, to judge the true and false of the bank note.The limitation of algorithm process under reflective imaging can be overcome.The paper currency detection scheme that the present invention is provided, it is easy to accomplish, cost of implementation is relatively low, detects quick and accurate, goes out counterfeit money so as to quick detection, effect becomes apparent.
Description
Technical field
The present invention relates to image procossing and identification technology field, and in particular to a kind of banknote discriminating method and dress
Put.
Background technology
Financial order and interests of the general public are safeguarded, prevent that counterfeit money comes into the market, the false distinguishing of bank note is finance
The problem of management organization particularly pays close attention to.Based on traditional false distinguishing such as magnetic in traditional paper money counter, sorting equipment
Mode is largely used, and the mode based on image detection is concentrated mainly on new and old, currency type, and spot, coding is known
Not, aid in false distinguishing, auxiliary Thickness sensitivity.In addition, some false distinguishing features, e.g., 05 edition 100 yuan of people
The Great Hall of the People figure at people's coin back side, the characteristic point such as the great hall information can be used as auxiliary mirror under infrared light
Pseudo- means.But cause its false distinguishing level not high because this kind of image false-proof point is easily imitated.
At present in the correlation technique of image false distinguishing, most false distinguishing abilities are not very strong, in paper money counter and sorting
It is most for auxiliary false distinguishing in machine.Such as, it is false proof using the infrared image of RMB, at the 05 edition RMB back side
The great hall image be half, some counterfeit moneys are that whole the great hall information all possess, or are not had.Accordingly can be with
Carry out false distinguishing.But this feature is easy to be imitated in the counterfeit money using infrared printing ink.
Because being suitable only for quiet if other false distinguishing points such as microfilm of characters or intaglio ink etc. based on image
The high-resolution image recognition of state, in the cash inspecting machine or cleaning-sorting machine of high speed counting, due to being difficult to shoot height
The image of definition and can not apply in the financial machine and tool of high speed counting.Therefore in false distinguishing, traditional magnetic
The mode such as false distinguishing and fluorescence false distinguishing remains as main false distinguishing mode.Such mode has been maturation side in the industry
Case, but the false distinguishing pass that equally counterfeit money breaks through the financial machine and tool such as cash inspecting machine is also that, by the imitative magnetic information of height, fluorescence is believed
Cease and circulated in actual financial market.
Because counterfeit money manufacturing technology is more and more brilliant, for existing measuring means, counterfeit money producer is not yet
Disconnected renewal, is tackled using corresponding technological means, is " as virtue rises one foot, vice rises ten ".In order to improve
The counterfeit money manufacture means of development are constantly updated in false distinguishing level, quick reply, it is necessary on existing measuring means basis
On, using existing anti-counterfeiting mark or characteristic information on current paper money in circulation, using new detection false distinguishing skill
Art, improves the discriminating performance of financial machine and tool, containment counterfeit money circulation, to safeguard financial order and the public
Interests.
The content of the invention
In view of this, the present invention provides a kind of banknote discriminating method and device, is obtained using transmitted light on bank note
The image of anti-counterfeiting mark, and bank note discriminating is carried out according to the anti-counterfeiting mark.
The embodiments of the invention provide a kind of banknote discriminating method, for being with transmission optics to anti-counterfeiting mark
The thing to be detected of feature detected, including：
Bank note to be measured is driven to be moved forward along a transparent support plate；
When detecting bank note to be measured by predetermined detection zone, open transmitted light source and shone to the detection zone
Penetrate, anti-counterfeiting mark image on bank note to be measured described in triggering image acquisition device；
The anti-counterfeiting mark image collected is handled and analyzed, false distinguishing result is exported.
It is preferred that the transmitted light source is arranged at small with the central axis angle of the predetermined Examination region
In or equal to 30 degree of position；Described image collecting unit is arranged between the transmitted light source
Angle is less than or equal to 30 degree of position.
It is preferred that the transparent support plate uses non-reflecting glass plate；And/or, the transmitted light source is used
White light source.
It is preferred that the anti-counterfeiting mark of the collection includes positive back of the body complementary pair on label to be patterned, watermark, or holographic magnetic
One or more in property safety line.
It is preferred that the collection anti-counterfeiting mark image includes：
The specification of bank note to be measured is detected, determines that the anti-counterfeiting mark is expected the regional extent occurred；
Described image collecting unit is controlled to gather the image of the regional extent.
It is preferred that the collection anti-counterfeiting mark image includes：
Described image collecting unit is controlled to gather the full width face image of bank note to be measured；
The specification of bank note is detected, determines that the anti-counterfeiting mark is expected the regional extent occurred；
The image of the regional extent is intercepted from the full width face image collected.
It is preferred that described image harvester is using a contact-type image sensor, CMOS half
Conductor, or charge coupling device imaging sensor collection image.
It is preferred that it is described anti-counterfeiting mark image is handled and analyzed including：
Obtain the pixel of the anti-counterfeiting mark image；
Calculate the gray value and/or binaryzation of the pixel；
The image edge information of anti-counterfeiting mark is extracted according to the gray value and/or binaryzation；
Morphology denoising is carried out to described image edge；
By the marginal information and default gray value masterplate and/or binaryzation stencil matching, it is determined that identification knot
Really.
It is preferred that the lane change being arranged at according to false distinguishing output control between genuine note holding tank and counterfeit money holding tank is kept off
Plate, bank note is sent in corresponding holding tank.
It is preferred that when false distinguishing result is counterfeit money, sending alarm signal.
A kind of banknote discriminating method and device that the present invention is provided, anti-counterfeiting mark on bank note is obtained using transmitted light
Image, be identified by the image to acquired anti-counterfeiting mark, to judge the true and false of the bank note.
The limitation of algorithm process under reflective imaging can be overcome.The paper currency detection scheme that the present invention is provided, it is easy to real
Existing, cost of implementation is relatively low, detects quick and accurate, goes out counterfeit money so as to quick detection, effect becomes apparent.
Figure of description
Fig. 1 is a kind of paper money discrimination device block diagram provided in an embodiment of the present invention；
Fig. 2 is the block diagram of another bill discriminating apparatus provided in an embodiment of the present invention；
Fig. 3 is the block diagram of another bill discriminating apparatus provided in an embodiment of the present invention；
Fig. 4 is the block diagram of another bill discriminating apparatus provided in an embodiment of the present invention；
Fig. 5 is the block diagram of another bill discriminating apparatus provided in an embodiment of the present invention；
Fig. 6 is the block diagram of another bill discriminating apparatus provided in an embodiment of the present invention；
Fig. 7 is paper money discrimination method flow diagram provided in an embodiment of the present invention；
Fig. 8 is a kind of method flow diagram for gathering anti-counterfeiting mark image provided in an embodiment of the present invention；
Fig. 9 is the method flow diagram of another collection anti-counterfeiting mark image provided in an embodiment of the present invention；
Figure 10 is a kind of method stream that anti-mark figure is analyzed and handled provided in an embodiment of the present invention
Cheng Tu；
Figure 11 is another method that anti-mark figure is analyzed and handled provided in an embodiment of the present invention
Flow chart；
Figure 12 is a kind of side that false distinguishing is carried out to RMB complementary pair on label to be patterned that application example of the present invention is provided
Method flow chart；
Figure 13 A and 13a are respectively the figure of the complementary pair on label to be patterned of the true and false coin gathered in the embodiment of the present invention
Picture；
Figure 13 B and 13b are respectively the ash of the complementary pair on label to be patterned of the true and false coin provided in the embodiment of the present invention
Spend image；
Figure 13 C and 13c are respectively provide in the embodiment of the present invention true after denoising and binary conversion treatment
Counterfeit money complementary pair prints the image of ancient money pattern；
Figure 13 D and 13d are respectively the true and false coin complementary pair print ancient money pattern provided in the embodiment of the present invention
Edge binary map；
Figure 13 E and 13e are respectively the true and false coin complementary pair print ancient money pattern provided in the embodiment of the present invention
Gray scale binary map.
Embodiment
There is the anti-counterfeiting mark with transmission optics feature on bank note, conventional at present has positive back of the body complementary pair print
Pattern, watermark, or holographic magnetic safety line.Genuine note is positive back side one-step print technology, with transmission
The anti-counterfeiting mark of optical signature can be precisely coincident.And counterfeit money is generally front, the back side and printed twice, thus
It can not be precisely coincident, often misplace, it is overlapping etc., it could only be detected under transmission case.For example,
Positive back of the body complementary pair impression shape, can not see coincidence effect, judgement also can not be just identified in reflection, but
It can judge the true and false of bank note according to the image of formation is overlapped under transmission.For example, for 05 edition people
The ancient money figure of complementary pair print is just being carried on the back in coin using offset printing, can formed according to whether ancient money figure overlaps
Whole ancient money figure carrys out false distinguishing.But, at present general way is to meet x ray fluoroscopy x, and human eye differentiates, so
The degree of accuracy of discriminating is not fine.
In view of the deficiencies in the prior art, a kind of paper money discrimination method and device that the present invention is provided,
The image of the anti-counterfeiting mark on bank note with transmission optics feature is obtained using transmitted light, by acquired
The image of anti-counterfeiting mark is identified, to judge the true and false of the bank note automatically.The bank note inspection that the present invention is provided
Survey scheme, it is easy to accomplish, cost of implementation is relatively low, detects quick and accurate, counterfeit money is gone out so as to quick detection,
Effect becomes apparent.
The image of the anti-counterfeiting mark with transmission optics feature, can be for example described in the embodiment of the present invention
One or more in positive back of the body complementary pair on label to be patterned, watermark, or holographic magnetic safety line.The present invention is right
This is not limited, and the detection for other anti-counterfeiting marks with transmission optics feature is also applicable.
Referring to Fig. 1, the embodiments of the invention provide a kind of paper money discrimination device, including：
One transparent support plate 101, for supporting detected material；
One drive device 102, for driving detected material to be moved forward along the supporting plate；
One transmitted light source 103, is arranged at a predetermined detection zone 104 1 on the transparent support plate 101
Side；
One controller 105, during for detecting bank note to be measured by the predetermined detection zone 104, drives
The transmitted light source 103 is moved to light；
One image collecting device 106, is arranged at the predetermined side of detection zone 104, in institute each time
State when transmitted light source 103 is lighted and be triggered, gather anti-counterfeiting mark image on the bank note to be measured；
One image processor 107, is handled and is analyzed to the anti-counterfeiting mark image collected, exports false distinguishing
As a result.
It is preferred that the transmitted light source 103 is arranged at the central shaft with the predetermined Examination region 104
Wire clamp angle is less than or equal to 30 degree of position, and described image collecting unit 106 is arranged at and the transmission
Angle between light source 103 is less than or equal to 30 degree of position.The design angle, enables to collection
The fluoroscopy images best results arrived.
It is preferred that the transparent support plate 101 can use non-reflecting glass plate.
It is preferred that the transmitted light source 103 uses white light source.
In one embodiment, as shown in Fig. 2 described image harvester 206 includes positioning unit 2061
With collecting unit 2062, wherein：
The positioning unit 2061, the specification for detecting bank note to be measured determines that the anti-counterfeiting mark is expected
The regional extent of appearance；
The collecting unit 2062, for gathering the image in the regional extent.
Specifically, the collecting unit 2062, is a contact-type image sensor, CMOS
Semiconductor, or charge coupling device imaging sensor.
In another embodiment, as shown in figure 3, described image harvester 306 include collecting unit 3061,
Positioning unit 3062 and sectional drawing unit 3063, wherein：
The collecting unit 3061, the full width face image for gathering bank note to be measured；
The positioning unit 3062, the specification for detecting bank note determines that the anti-counterfeiting mark is expected to occur
Regional extent；
The sectional drawing unit 3063, the figure for intercepting the regional extent from the full width face image collected
Picture.
Specifically, the collecting unit 3061, is a contact-type image sensor, CMOS
Semiconductor, or charge coupling device imaging sensor.
In one embodiment, as shown in figure 4, described image processor 407 includes：
First module 4071, the pixel for obtaining the anti-counterfeiting mark image；
Second unit 4072, the gray value for calculating the pixel；
Third unit 4073, the image edge information for extracting anti-counterfeiting mark according to the gray value；
4th unit 4074, for carrying out morphology denoising to described image edge；
5th unit 4075, for by the marginal information and default gray value stencil matching, it is determined that knowing
Other result.
In another embodiment, as shown in figure 5, described image processor 507 includes：
First module 5071, the pixel for obtaining the anti-counterfeiting mark image；
Second unit 5072, for carrying out binary conversion treatment to the pixel；
Third unit 5073, the image edge information for extracting anti-counterfeiting mark；
4th unit 5074, for carrying out morphology denoising to described image edge；
5th unit 5075, for by the marginal information and default binaryzation stencil matching, it is determined that knowing
Other result.
In another embodiment, described image processor can carry out gray proces and binary conversion treatment simultaneously,
That is, both comprising the unit 4075 of first module in Fig. 4 4071 to the 5th, and first module in Fig. 5 5071 is included
To the 5th unit 5075, two recognition results that gray scale identification and two-value are recognized are considered, output is final
False distinguishing result so that further increase false distinguishing the degree of accuracy.
In one embodiment, as shown in fig. 6, also including genuine note holding tank 608 and counterfeit money holding tank 609,
The transparent support plate 601 is deposited through a lane change baffle plate 610 with the genuine note holding tank 608 or the counterfeit money
Storage tank 609 is communicated.The controller 605, according to the false distinguishing result of described image processor 607, control
The lane change baffle plate 610 is acted, by the transparent support plate 601 and the genuine note holding tank 608 or institute
Counterfeit money holding tank 609 is stated to communicate.
In one embodiment, in addition to a money transmitting channel (not shown), the various embodiments described above are covered in
In each part outside, prevent detected material along the supporting plate move forward when, flown out from supporting plate
The problem of.
In one embodiment, a buzzer siren can also be included, when identifying counterfeit money, triggering is described
Buzzer siren sends alarm.
The above-mentioned paper money discrimination device of design of the embodiment of the present invention, being obtained using transmitted light on bank note is had thoroughly
The image of the anti-counterfeiting mark of optical signature is penetrated, is identified by the image to acquired anti-counterfeiting mark, is come
Automatically the true and false of the bank note is judged.The paper currency detection scheme that the present invention is provided, it is easy to accomplish, cost of implementation
It is relatively low, detect quick and accurate, go out counterfeit money so as to quick detection, effect becomes apparent.
Based on the above-mentioned paper money discrimination device of the embodiment of the present invention, it is described below and how realizes paper money discrimination mistake
Journey, as shown in fig. 7, comprises step：
Step S701：Paper money discrimination device starts, and drives bank note to be measured to be moved forward along a transparent support plate；
Step S702：When detecting bank note to be measured by predetermined detection zone, transmitted light source is opened to institute
Detection zone irradiation is stated, the image of anti-counterfeiting mark on bank note to be measured described in image acquisition device is triggered；
Step S703：The anti-counterfeiting mark image collected is handled and analyzed, false distinguishing result is exported；
Step S704：According to false distinguishing output control lane change baffle plate, counterfeit money is separated with genuine note.
The embodiment of the present invention uses above-mentioned steps, using the image for the anti-counterfeiting mark for transmiting light collection bank note, leads to
Cross image procossing identification technology, the true and false of identification note.There is transmission optics feature there is provided a kind of be directed to
The solution of the automatic false distinguishing of anti-counterfeiting mark.
In one embodiment, the step of anti-counterfeiting mark image is gathered in step S702 is as shown in figure 8, specific
Including：
Step S801：The specification of bank note to be measured is detected, determines that the anti-counterfeiting mark is expected the region model occurred
Enclose；
Step S802：Image acquisition units are controlled to gather the image of the regional extent.
In another embodiment, the image step of anti-counterfeiting mark is gathered in step S702 as shown in figure 9, tool
Body includes：
Step S901：Image acquisition units are controlled to gather the full width face image of bank note to be measured；
Step S902：The specification of bank note is detected, determines that the anti-counterfeiting mark is expected the regional extent occurred；
Step S903：The image of the regional extent is intercepted from the full width face image collected.
In one embodiment, the anti-counterfeiting mark image collected is handled and analyzed in step S703
Step as shown in Figure 10, is specifically included：
Step S1001：Obtain the pixel of the anti-counterfeiting mark image；
Step S1002：Calculate the gray value of the pixel；
Step S1003：The image edge information of anti-counterfeiting mark is extracted according to the gray value；
Step S1004：Morphology denoising is carried out to described image edge；
Step S1005：By the marginal information and default gray value stencil matching, recognition result is determined.
In another embodiment, the step of anti-mark figure being analyzed and handled in step S703 is as schemed
Shown in 11, specifically include：
Step S1101：Obtain the pixel of the anti-counterfeiting mark image；
Step S1102：Binary conversion treatment is carried out to the pixel；
Step S1103：Extract the image edge information of anti-counterfeiting mark；
Step S1104：Morphology denoising is carried out to described image edge；
Step S1105：By the marginal information and default binaryzation stencil matching, recognition result is determined.
In another embodiment, gray proces can be carried out simultaneously by anti-counterfeiting mark image being gathered in step S703
And binary conversion treatment, both comprehensive recognition results, final false distinguishing result is exported, so as to further increase
The degree of accuracy of false distinguishing.
For vivider explanation, paper money discrimination scheme of the present invention is illustrated with a concrete application example below.
As shown in figure 12, by taking RMB complementary pair print ancient money pattern as an example, specific handling process is as follows：
Step S1201：Paper money discrimination device starts, and starts to walk paper money；
Step S1202：Gather the full image of bank note to be measured；
Image acquisition unit (such as CIS, CMOS or CCD) is located at paper money identifier respectively with light source
Money transmitting channel both sides, utilize light source through bank note transmission light collection bank note full image.
Step S1203：Detect acquired image, positioning serial number position determine bank note towards；
According to serial number it is positive and negative can determine that bank note towards, and then determine offset printing to being patterned, i.e. Figure 13 A
And the position of the ancient money pattern shown in 13a.
Step S1204：Using serial number coordinate as offset printing is positioned to the datum mark being patterned, intercept complementary
Offset image；
Step S1205：Complementary offset image is converted into gray level image, complementary offset image edge is extracted,
And carry out morphology denoising；
The gray level image of true and false coin complementary pair print ancient money pattern is respectively as shown in Figure 13 B and 13b.
Step S1206：By complementary offset printing figure image binaryzation, according to marginal information detection identification offset printing pattern；
Figure 13 C and 13c are the true and false coin complementary pair print ancient money figure after respectively denoising and binary conversion treatment
The image of case, finds out by contrast, the significant difference of true and false coin.
Step S1207：Whether the complementary offset printing pattern of detection identification is qualified；
By contrast as can be seen that true and false coin has significant difference.The complementary offset printing of genuine note shown in Figure 13 D
Ancient money pattern is complete, clear, and the offset printing complementary pair of genuine note shown in Figure 13 d print ancient money dim pattern
And it is imperfect.
Step S1208：Detect whether binary map and gray-scale map registration information based on gray scale are normal；
After binary conversion treatment, whether ancient money figure overlaps to form complete ancient money figure in image.
It can be seen that from Figure 13 E and 13e, the significant difference of true and false coin.
Step S1209：Export false distinguishing result.
Based on offset printing complementary pair on label to be patterned (the i.e. ancient money pattern) profile detected, it can use based on ash
Spend and image registration identification is carried out based on binary map two ways.
Based on binary map, its perspective view is arrived according to what the symmetry direction of pattern was projected, according to perspective view
Symmetry carry out registering detection.The ancient money figure illustrated such as RMB, is obtaining two based on gray scale
It is worth after figure, can be simultaneously to horizontally and vertically projecting, because ancient money is in the two directions
Symmetrically.Therefore perspective view is being symmetrical based on pattern center location, therefore for this category feature at center
Point carries out left and right data correspondence and subtracted each other, and all absolute values for subtracting each other result are summed.Available residual sum,
Can be much smaller relative to counterfeit money in genuine note, because genuine note is symmetrical, and counterfeit money perspective view is based on pattern
Center is asymmetric.
Similarity Measure based on gray scale, from can navigate to the central point of pattern above.From symmetrical
Direction of principal axis sees genuine note meeting almost symmetry, and counterfeit money can not then be overlapped because printing the reasons such as dislocation, non complete symmetry.
Therefore, two half parts of left and right are cut out after symmetry axis is navigated to, can be using the ripe mould based on gray value
Plate matching technique is matched.Such as image difference and (SAD), image difference quadratic sum (SSD), normalization
The various methods such as cross-correlation coefficient (NCC).It will compare asymmetric image for SAD, SSD symmetric graph picture
Small many of numerical value.NCC then more symmetrical image values closer to 1.Therefore, according to result of calculation, if
Set empirical value.Genuine note and counterfeit money can be made a distinction.
In the image acquisition process of anti-counterfeiting mark region, the position of collection can not change hardware knot
On the premise of structure, software design patterns can be passed through., according to Information, using anti-counterfeiting mark region as thick
The position of positioning, then carries out IMAQ, and carry out binaryzation and morphologic filtering etc. to the image of collection
Processing.According to the image after processing to being accurately positioned to being patterned.The symmetry of pattern is recycled two
Registration is carried out in value figure and gray-scale map, and then it is genuine note or counterfeit money to identify bank note.
A kind of banknote discriminating method and device that the present invention is provided, anti-counterfeiting mark on bank note is obtained using transmitted light
Image, be identified by the image to acquired anti-counterfeiting mark, to judge the true and false of the bank note.
The limitation of algorithm process under reflective imaging can be overcome.The paper currency detection scheme that the present invention is provided, it is easy to real
Existing, cost of implementation is relatively low, detects quick and accurate, goes out counterfeit money so as to quick detection, effect becomes apparent.
The transmission mode that the present invention is used carries out false distinguishing, and relative to reflective graphical analysis, hardware cost subtracts
It is few, it is more prone to commercialization.The invention provides using existing anti-counterfeiting mark, there is provided a kind of new mirror
Pseudo- means, increase false distinguishing dynamics, with reference to existing false distinguishing means, counterfeit money can be further prevented from root
Circulation.It is the high-end technology in printing technology because complementary pair prints technology, and the requirement to printing machine is very high.
Counterfeit money be difficult in colourity and complementary image coincidence degree on accomplish the effect completely the same with genuine note, counterfeit money
It is difficult to accomplish complete registration, typically occur dislocation, the phenomenon such as overlapping.
The Processing Algorithm that the present invention is provided has a versatility, complementary pair print technology be various countries generally use it is false proof
Technology, implementation feature is similar.Therefore algorithm is realized similar, and modularization is easier when commercialization, rises
Level more facilitates.More easily reach the requirement that a machine differentiates multi national river.
According to the disclosed embodiment, those skilled in the art can be enabled to realize or use this hair
It is bright.To those skilled in the art, the various modifications of these embodiments be it will be apparent that and this
In the general principles that define can also be applied to other on the basis of the scope and spirit of the present invention are not departed from
Embodiment.Embodiment described above is only presently preferred embodiments of the present invention, not to limit this hair
It is bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc.,
It should be included within protection scope of the present invention.
Claims (10)
1. a kind of paper money discrimination method, for being the thing to be detected with transmission optics feature to anti-counterfeiting mark
Detected, it is characterised in that including：
Bank note to be measured is driven to be moved forward along a transparent support plate；
When detecting bank note to be measured by predetermined detection zone, open transmitted light source and shone to the detection zone
Penetrate, anti-counterfeiting mark image on bank note to be measured described in triggering image acquisition device；
The anti-counterfeiting mark image collected is handled and analyzed, false distinguishing result is exported.
2. the method as described in claim 1, it is characterised in that：
The transmitted light source is arranged at be less than with the central axis angle of the predetermined Examination region or
Position equal to 30 degree；
Described image collecting unit is arranged at the angle between the transmitted light source and is less than or equal to 30
The position of degree.
3. the method as described in claim 1, it is characterised in that：
The transparent support plate uses non-reflecting glass plate；And/or,
The transmitted light source uses white light source.
4. the method as described in claim 1, it is characterised in that：
The anti-counterfeiting mark of the collection includes positive back of the body complementary pair on label to be patterned, watermark, or holographic magnetic safety line
In one or more.
5. the method as described in claim 1, it is characterised in that the collection anti-counterfeiting mark image includes：
The specification of bank note to be measured is detected, determines that the anti-counterfeiting mark is expected the regional extent occurred；
Described image collecting unit is controlled to gather the image of the regional extent.
6. the method as described in claim 1, it is characterised in that the collection anti-counterfeiting mark image includes：
Described image collecting unit is controlled to gather the full width face image of bank note to be measured；
The specification of bank note is detected, determines that the anti-counterfeiting mark is expected the regional extent occurred；
The image of the regional extent is intercepted from the full width face image collected.
7. the method as described in claim 1, it is characterised in that：
Described image harvester uses a contact-type image sensor, complementary metal oxide semiconductor, or
Person's charge coupling device imaging sensor gathers image.
8. the method as described in claim 1, it is characterised in that it is described to anti-counterfeiting mark image at
Reason and analysis include：
Obtain the pixel of the anti-counterfeiting mark image；
Calculate the gray value and/or binaryzation of the pixel；
The image edge information of anti-counterfeiting mark is extracted according to the gray value and/or binaryzation；
Morphology denoising is carried out to described image edge；
By the marginal information and default gray value masterplate and/or binaryzation stencil matching, it is determined that identification knot
Really.
9. the method as described in claim 1, it is characterised in that：
Lane change baffle plate between genuine note holding tank and counterfeit money holding tank is arranged at according to false distinguishing output control, by paper
Coin is sent in corresponding holding tank.
10. the method as described in claim 1, it is characterised in that：
When false distinguishing result is counterfeit money, alarm signal is sent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610245603.7A CN107305716A (en) | 2016-04-20 | 2016-04-20 | A kind of banknote discriminating method and device |
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| CN201610245603.7A CN107305716A (en) | 2016-04-20 | 2016-04-20 | A kind of banknote discriminating method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448219A (en) * | 2018-10-25 | 2019-03-08 | 深圳怡化电脑股份有限公司 | Image matching method, device, bill identifier and computer readable storage medium |
| CN111766254A (en) * | 2019-04-01 | 2020-10-13 | 深圳兆日科技股份有限公司 | Paper detection method and device and computer readable storage medium |
| CN112740270A (en) * | 2019-06-21 | 2021-04-30 | 大日本印刷株式会社 | Judgment device, control method of judgment device, judgment system, control method of judgment system, and program |
| CN113239767A (en) * | 2021-04-30 | 2021-08-10 | 武汉卓目科技有限公司 | Black watermark identification method and system based on machine learning |
-
2016
- 2016-04-20 CN CN201610245603.7A patent/CN107305716A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448219A (en) * | 2018-10-25 | 2019-03-08 | 深圳怡化电脑股份有限公司 | Image matching method, device, bill identifier and computer readable storage medium |
| CN111766254A (en) * | 2019-04-01 | 2020-10-13 | 深圳兆日科技股份有限公司 | Paper detection method and device and computer readable storage medium |
| CN112740270A (en) * | 2019-06-21 | 2021-04-30 | 大日本印刷株式会社 | Judgment device, control method of judgment device, judgment system, control method of judgment system, and program |
| CN112740270B (en) * | 2019-06-21 | 2024-04-26 | 大日本印刷株式会社 | Determination device, determination device control method, determination system, determination system control method, and medium |
| CN113239767A (en) * | 2021-04-30 | 2021-08-10 | 武汉卓目科技有限公司 | Black watermark identification method and system based on machine learning |
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Application publication date: 20171031 |