CN107730707B - A kind of false distinguishing method and device of valuable document - Google Patents
A kind of false distinguishing method and device of valuable document Download PDFInfo
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- CN107730707B CN107730707B CN201710899425.4A CN201710899425A CN107730707B CN 107730707 B CN107730707 B CN 107730707B CN 201710899425 A CN201710899425 A CN 201710899425A CN 107730707 B CN107730707 B CN 107730707B
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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
- G07D7/2016—Testing patterns thereon using feature extraction, e.g. segmentation, edge detection or Hough-transformation
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Abstract
The present invention is suitable for the authentication detection technology field of valuable document, provides a kind of false distinguishing method and device of valuable document.This method comprises: acquiring valuable document with the imaging sensor of predetermined resolution, the image containing moire fringes is obtained；Obtain the angular second moment of the first gray level co-occurrence matrixes of the image containing moire fringes；Obtain the angular second moment of the original image of valuable document and the second gray level co-occurrence matrixes of original image；The angular second moment of angular second moment and the second gray level co-occurrence matrixes based on the first gray level co-occurrence matrixes calculates the distinguishing value of the image containing moire fringes and original image；The distinguishing value is compared with default threshold value of distinguishing, identifies the true and false of the valuable document.The present invention is not necessarily to that the identification to the valuable document true and false can be completed by complicated operation, and easy to operate, false distinguishing is high-efficient.
Description
Technical field
The invention belongs to the authentication detection technology field of valuable document more particularly to the false distinguishing methods and dress of a kind of valuable document
It sets.
Background technique
Valuable document includes banknote, certificate, magnetic card, bill etc..
The false distinguishing method of existing valuable document is mostly the original infrared image by obtaining valuable document, and passes through one
The purpose of false distinguishing is realized in the processing of series, wherein the pre-treatment step to infrared image just includes at least: using Gaussian smoothing skill
Art to the infrared image carry out picture smooth treatment, and using partial differential equation image-recovery technique to infrared image into
Row recovery processing, pretreated calculating step is with regard to more.Therefore, the false distinguishing method of existing this valuable document exists as follows
Problem: processing step is more, false distinguishing low efficiency.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of false distinguishing method and device of valuable document, to solve existing skill
The problem of that there are processing steps is more for the false distinguishing method of valuable document in art, false distinguishing low efficiency.
The first aspect of the embodiment of the present invention provides a kind of false distinguishing method of valuable document, comprising:
Valuable document is acquired with the imaging sensor of predetermined resolution, obtains the image containing moire fringes；
Obtain the angular second moment of the first gray level co-occurrence matrixes of the image containing moire fringes；
Obtain the angle second order of the original image of the valuable document and the second gray level co-occurrence matrixes of the original image
Square；
The angular second moment of angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes calculates institute
State the distinguishing value of moire fringes region and original image；
The distinguishing value is compared with default threshold value of distinguishing, identifies the true and false of the valuable document.
The second aspect of the embodiment of the present invention provides a kind of false-identifying device of valuable document, comprising:
Acquisition module obtains the figure containing moire fringes for acquiring valuable document with the imaging sensor of predetermined resolution
Picture；
First obtains module, for obtaining the first gray scale symbiosis for having moire fringes region in the image information of moire fringes
The angular second moment of matrix；
Second obtains module, the angle second order of the second gray level co-occurrence matrixes for obtaining the valuable document original image
Square；
Third obtains module, for angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes
Angular second moment calculate the distinguishing value in the moire fringes region and original image；
Judgment module, for identifying the true and false of the valuable document.
The third aspect of the embodiment of the present invention provides a kind of false-identifying device of valuable document, including memory, processor
And store the computer program that can be run in the memory and on the processor, which is characterized in that the processing
Device performs the steps of when executing the computer program
Valuable document is acquired with the imaging sensor of predetermined resolution, obtains the image containing moire fringes；
Obtain the angular second moment of the first gray level co-occurrence matrixes of the image containing moire fringes；
Obtain the angle second order of the original image of the valuable document and the second gray level co-occurrence matrixes of the original image
Square；
The angular second moment of angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes calculates institute
State the distinguishing value of moire fringes region and original image；
The distinguishing value is compared with default threshold value of distinguishing, identifies the true and false of the valuable document.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, which is characterized in that the computer program performs the steps of when being executed by processor
Valuable document is acquired with the imaging sensor of predetermined resolution, obtains the image containing moire fringes；
Obtain the angular second moment of the first gray level co-occurrence matrixes of the image containing moire fringes；
Obtain the angle second order of the original image of the valuable document and the second gray level co-occurrence matrixes of the original image
Square；
The angular second moment of angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes calculates institute
State the distinguishing value of moire fringes region and original image；
The distinguishing value is compared with default threshold value of distinguishing, identifies the true and false of the valuable document.
The embodiment of the present invention is obtained by acquiring valuable document with the imaging sensor of predetermined resolution containing moire fringes
Image；The angular second moment and second of the first gray level co-occurrence matrixes of the image containing moire fringes and original image is obtained respectively
The angular second moment of gray level co-occurrence matrixes, and calculate the distinguishing value in the moire fringes region and original image, by the distinguishing value with
Default threshold value of distinguishing is compared, and identifies the true and false of the valuable document, without that can complete by complicated operation to having
The identification of the value document true and false, easy to operate, false distinguishing is high-efficient.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the implementation process schematic diagram of the false distinguishing method for the valuable document that the embodiment of the present invention one provides；
Fig. 2 is the partial schematic diagram of the original image of bank note in the embodiment of the present invention；
Fig. 3 is the partial schematic diagram for the image that bank note has moire fringes in the embodiment of the present invention；
Fig. 4 is a kind of specific implementation flow schematic diagram of step S102 of the embodiment of the present invention；
Fig. 5 is the implementation process schematic diagram of the false distinguishing method of valuable document provided by Embodiment 2 of the present invention；
Fig. 6 is the structural block diagram of the false-identifying device for the valuable document that the embodiment of the present invention three provides；
Fig. 7 is the schematic diagram of the false-identifying device for the valuable document that the embodiment of the present invention four provides.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Embodiment one
Fig. 1 shows the implementation process schematic diagram of the false distinguishing method of the valuable document of the offer of the embodiment of the present invention one.Such as Fig. 1
Shown, the false distinguishing method of the valuable document specifically comprises the following steps S101 to step S105.
Step S101: valuable document is acquired with the imaging sensor of predetermined resolution, obtains the image containing moire fringes.
Specifically, the difference of the resolution ratio of the original image of the predetermined resolution and the valuable document is less than predetermined
Value.In order to keep the resolution ratio of the original image of the predetermined resolution and the valuable document close, predetermined value can be chosen
It is sufficiently small.Particularly, for the false distinguishing of bank note, banknote image is acquired using the cmos sensor of 200dpi resolution ratio, because of paper
The resolution ratio of resolution ratio and cmos sensor on coin image is close, and banknote image would generally show moire fringes.Fig. 2 and Fig. 3
Respectively illustrate the image of the partial schematic diagram of the original image of bank note and bank note with moire fringes in the embodiment of the present invention
Partial schematic diagram；Therefore, acquiring the moire fringes occurred on image can just prove that the texture of banknote image printing meets original
The textural characteristics of beginning；Moire fringes are detected, the authenticity of print characteristics on valuable document can be just verified.
Step S102: the angular second moment of the first gray level co-occurrence matrixes of the image containing moire fringes is obtained.
Optionally, step S102 includes:
Step S201: the first gray level co-occurrence matrixes of the image containing moire fringes is obtained
Step S202: being normalized first gray level co-occurrence matrixes, and total based on the first gray scale after normalization
The angular second moment of the first gray level co-occurrence matrixes is calculated in raw matrix.
Step S103: the original image of the valuable document and the second gray scale symbiosis square of the original image are obtained
The angular second moment of battle array.
Step S104: the angle second order of angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes
Square calculates the distinguishing value in the moire fringes region and original image.
Step S105: the distinguishing value is compared with default threshold value of distinguishing, identifies the true and false of the valuable document.
Optionally, if the distinguishing value is less than the default differentiation threshold value, identify that the valuable document is counterfeit；If
The distinguishing value is more than or equal to the default differentiation threshold value, then identifies that the valuable document is genuine piece.
Optionally, if there is deviation in the placement orientation and pre-configured orientation of the valuable document, the valuable document is carried out
Geometric correction.
It the basic geometric operation such as extracts for rotation to be no longer described herein, directly against the banknote image after extracted
Region with moire fringes feature is illustrated.
Gray level co-occurrence matrixes are the matrix functions of pixel distance and angle, it is by certain distance in calculating image and centainly
Correlation between the two o'clock gray scale in direction, integrated information of the Lai Fanying image on direction, interval, amplitude of variation and speed.
It takes any point (x, y) in image (N × N) and deviates its another point (x+a, y+b), if the gray value of the point pair
For (g1, g2).It enables point (x, y) move on entire picture, then can obtain various (g1, g2) values, if the series of gray value is k,
The then square kind of the shared k of the combination of (g1, g2).For entire picture, the number of each (g1, g2) value appearance is counted, so
After be arranged in a square matrix, then they are normalized to the probability P (g1, g2) occurred by the total degree occurred with (g1, g2), in this way
Square matrix be known as gray level co-occurrence matrixes.Different combinations of values, the connection under available different situations are taken apart from difference value (a, b)
Close probability matrix.(a, b) value can be selected according to the characteristic that Texture-period is distributed, for thinner texture, choose (1,
0), the small difference value such as (1,1), (2,0).
Work as a=1, when b=0, pixel is to being horizontal, i.e., 0 degree scanning；Work as a=0, when b=1, pixel to be it is vertical,
I.e. 90 degree scannings；Work as a=1, when b=1, pixel to be it is right cornerwise, i.e., 45 degree scan；Work as a=-1, when b=1, pixel pair
It is left diagonal line, i.e., 135 degree scannings.In this way, two simultaneous probability of pixel grayscale, just by the space coordinate of (x, y)
It is converted into the description of " gray scale to " (g1, g2), forms gray level co-occurrence matrixes.
Angular second moment ASM=sum (p (i, j) .^2), wherein gray level co-occurrence matrixes after p (i, j) aim one.Angular second moment
It is that image grayscale is evenly distributed a measurement of degree and texture thickness, when image texture is more careful, intensity profile is uniform, energy
Magnitude is larger, conversely, smaller.
For in above-mentioned diagram, there is the image texture of moire fringes in diagonal distribution, normal picture texture is in finer and closely woven water
Divide cloth equally.
Therefore the statistics of gray level co-occurrence matrixes is carried out respectively (according to having to the above-mentioned image containing moire fringes and original image
The characteristics of image of moire fringes selects 135 degree of scannings), and calculate respective angular second moment.
Therefore based on the angular second moment of first gray level co-occurrence matrixes and the angular second moment of the second gray level co-occurrence matrixes
The absolute value for calculating the difference of the two, obtains the distinguishing value in the moire fringes region and original image；By the distinguishing value and preset
It distinguishes threshold value to be compared, optionally, if the distinguishing value is less than the default differentiation threshold value, identifies that the valuable document is
Counterfeit；If the distinguishing value is more than or equal to the default differentiation threshold value, identify that the valuable document is genuine piece.
In valuable document false distinguishing field, because true valuable document can be stable, there are rule textures, pass through predetermined point
The cmos sensor of resolution acquires the moire fringes feature of available fixation, but the valuable document forged, relevant range due to
Difference in printing technology generally can not obtain same textural characteristics, to will not have moire fringes same as true file.Cause
This, the gray level co-occurrence matrixes by calculating image determine its moire fringes feature, can identify the true and false of valuable document.
The embodiment of the present invention is obtained by acquiring valuable document with the imaging sensor of predetermined resolution containing moire fringes
Image；The angular second moment and second of the first gray level co-occurrence matrixes of the image containing moire fringes and original image is obtained respectively
The angular second moment of gray level co-occurrence matrixes, and calculate the distinguishing value in the moire fringes region and original image, by the distinguishing value with
Default threshold value of distinguishing is compared, and identifies the true and false of the valuable document, without that can complete by complicated operation to having
The identification of the value document true and false, easy to operate, false distinguishing is high-efficient.
Embodiment two
Fig. 5 shows the implementation process schematic diagram of the false distinguishing method of valuable document provided by Embodiment 2 of the present invention.In reality
On the basis of applying example one, as shown in figure 5, further including following steps S301 and step S302.
Step S301: the third ash that sample has the image of moire fringes and the sample not to have the image of moire fringes is calculated separately
Spend the angular second moment of co-occurrence matrix and the angular second moment of the 4th gray level co-occurrence matrixes.
Step S302: the angular second moment of angular second moment and the 4th gray level co-occurrence matrixes based on institute's third gray level co-occurrence matrixes
Obtain the default differentiation threshold value.
Similarly, calculating sample according to the method described above has the image of moire fringes and the sample not to have the image of moire fringes
The angular second moment of the angular second moment of third gray level co-occurrence matrixes and the 4th gray level co-occurrence matrixes is based on institute's third gray level co-occurrence matrixes
Angular second moment and the 4th gray level co-occurrence matrixes angular second moment calculate both difference absolute value, obtain distinguish threshold value, and
Default differentiation threshold value when threshold value belongs to similar valuable document with the sample as monitoring is distinguished using this.
The embodiment of the present invention has the image of moire fringes and the sample not to have the image of moire fringes by calculating separately sample
The angular second moment of third gray level co-occurrence matrixes and the angular second moment of the 4th gray level co-occurrence matrixes obtain preset differentiation threshold value,
It is high to calculate simple and accuracy.
Embodiment three
Referring to FIG. 6, it illustrates the structural block diagrams of the false-identifying device of the valuable document of the offer of the embodiment of the present invention four.Institute
The false-identifying device 40 for stating valuable document includes: acquisition module 41, and first obtains mould, and 42, second obtains module 43, and first calculates mould
Block 44 and judgment module 45.Wherein, the concrete function of each module is as follows:
Acquisition module 41 is obtained for acquiring valuable document with the imaging sensor of predetermined resolution containing moire fringes
Image；
First obtains module 42, total for obtaining first gray scale for having moire fringes region in the image information of moire fringes
The angular second moment of raw matrix；
Second obtains module 43, the angle second order of the second gray level co-occurrence matrixes for obtaining the valuable document original image
Square；
First computing module 44, for angular second moment and the second gray scale symbiosis square based on first gray level co-occurrence matrixes
The angular second moment of battle array calculates the distinguishing value in the moire fringes region and original image；
Judgment module 45, for identifying the true and false of the valuable document.
Optionally, the false-identifying device 40 of valuable document further include:
Correction module, for when there is deviation in the placement orientation and pre-configured orientation of the valuable document, then to described valuable
File carries out geometric correction.
Optionally, the false-identifying device 40 of valuable document further include:
Second computing module has the image of moire fringes and the sample not to have the image of moire fringes for calculating separately sample
Third gray level co-occurrence matrixes angular second moment and the 4th gray level co-occurrence matrixes angular second moment；
Third computing module, for angular second moment and the 4th gray level co-occurrence matrixes based on institute's third gray level co-occurrence matrixes
Angular second moment obtains the default differentiation threshold value.
Optionally, the first acquisition module 42 includes:
Acquiring unit, for obtaining the first gray scale symbiosis square for having moire fringes region in the image information of moire fringes
Battle array；
Computing unit, for first gray level co-occurrence matrixes to be normalized, and based on the first ash after normalization
The angular second moment of the first gray level co-occurrence matrixes is calculated in degree co-occurrence matrix.
The false-identifying device of valuable document provided in an embodiment of the present invention passes through the imaging sensor acquisition with predetermined resolution
Valuable document obtains the image containing moire fringes；The first ash of the image containing moire fringes and original image is obtained respectively
The angular second moment of co-occurrence matrix and the angular second moment of the second gray level co-occurrence matrixes are spent, and calculates the moire fringes region and original graph
The distinguishing value is compared with default threshold value of distinguishing, the true and false of the valuable document is identified, without relying on by the distinguishing value of picture
Complicated operation can complete the identification to the valuable document true and false, and easy to operate, false distinguishing is high-efficient.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Although it is each to will be further understood that term " first ", " second " etc. are used to describe in the text in some embodiments
Kind element, but these elements should not be limited by these terms.These terms be used only to by an element with it is another
Element distinguishes.For example, the first acquisition module can be named as the second acquisition module, and similarly, second obtains module
It can be named as the first acquisition module, without departing from the range of various described embodiments.First obtains module and second
Obtaining module all is to obtain module, but they are not same acquisition modules.
Example IV
Fig. 7 is the schematic diagram of the false-identifying device for the valuable document that five embodiments of the invention provide.As shown in fig. 7, the implementation
The false-identifying device 5 of the valuable document of example includes: processor 50, memory 51 and is stored in the memory 51 and can be in institute
State the computer program 52 run on processor 50, such as the false distinguishing method program of valuable document.The processor 50 executes institute
The step in the false distinguishing embodiment of the method for above-mentioned each valuable document, such as step shown in FIG. 1 are realized when stating computer program 52
Rapid S101 to S103.Alternatively, the processor 50 is realized in above-mentioned each Installation practice respectively when executing the computer program 52
The function of unit, such as the function of module 41 to 45 shown in Fig. 4.
Illustratively, the computer program 52 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 51, and are executed by the processor 50, to complete the present invention.Described one
A or multiple module/units can be the series of computation machine program instruction section that can complete specific function, which is used for
Implementation procedure of the computer program 52 in the false-identifying device 5 of the valuable document is described.For example, the computer program
52 can be divided into acquisition module, and first obtains module, and first obtains module, the first computing module and judgment module, each mould
The concrete function of block is as follows:
Acquisition module obtains the figure containing moire fringes for acquiring valuable document with the imaging sensor of predetermined resolution
Picture；
First obtains module, for obtaining the first gray scale symbiosis for having moire fringes region in the image information of moire fringes
The angular second moment of matrix；
Second obtains module, the angle second order of the second gray level co-occurrence matrixes for obtaining the valuable document original image
Square；
First computing module, for angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes
Angular second moment calculate the distinguishing value in the moire fringes region and original image；
Judgment module, for identifying the true and false of the valuable document.
The false-identifying device 5 of the valuable document can be desktop PC, notebook, palm PC and cloud server
Deng calculating equipment.The false-identifying device of the valuable document may include, but be not limited only to, processor 50, memory 51.This field skill
Art personnel are appreciated that Fig. 5 is only the example of the false-identifying device of valuable document, do not constitute the false-identifying device to valuable document
Restriction, may include perhaps combining certain components or different components, such as institute than illustrating more or fewer components
The false-identifying device for stating valuable document can also include input-output equipment, network access equipment, bus etc..
Alleged processor 50 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 51 can be the internal storage unit of the false-identifying device 5 of the valuable document, such as valuable document
False-identifying device 5 hard disk or memory.The memory 51 is also possible to the external storage of the false-identifying device 5 of the valuable document
The plug-in type hard disk being equipped in equipment, such as the false-identifying device 5 of the valuable document, intelligent memory card (Smart Media
Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card) etc..Further, described to deposit
Reservoir 51 can also both including the valuable document false-identifying device 5 internal storage unit and also including External memory equipment.Institute
Memory 51 is stated for storing other program sum numbers needed for the false-identifying device of the computer program and the valuable document
According to.The memory 51 can be also used for temporarily storing the data that has exported or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of logical function partition, there may be another division manner in actual implementation, such as
Multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device
Or the INDIRECT COUPLING or communication connection of unit, it can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It may include: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic that can carry the computer program code
Dish, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as does not include electric carrier signal and electricity according to legislation and patent practice, computer-readable medium in certain jurisdictions
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of false distinguishing method of valuable document characterized by comprising
Valuable document is acquired with the imaging sensor of predetermined resolution, obtains the image containing moire fringes；
Obtain the angular second moment of the first gray level co-occurrence matrixes of the image containing moire fringes；
Obtain the angular second moment of the original image of the valuable document and the second gray level co-occurrence matrixes of the original image；
The angular second moment of angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes contains described in calculating
There are the image of moire fringes and the distinguishing value of original image；
The distinguishing value is compared with default threshold value of distinguishing, identifies the true and false of the valuable document.
2. the false distinguishing method of valuable document as described in claim 1, which is characterized in that the predetermined resolution with it is described valuable
The difference of the resolution ratio of the original image of file is less than predetermined value.
3. the false distinguishing method of valuable document as described in claim 1, which is characterized in that the image with predetermined resolution passes
Sensor acquires valuable document, before obtaining the image containing moire fringes, further includes:
If there is deviation in the placement orientation and pre-configured orientation of the valuable document, geometric correction is carried out to the valuable document.
4. the false distinguishing method of valuable document as described in claim 1, which is characterized in that further include:
Calculate separately the angular second moment of the third gray level co-occurrence matrixes of the sample of the image containing moire fringes and without containing moire fringes
Image sample the 4th gray level co-occurrence matrixes angular second moment；
The angular second moment of angular second moment and the 4th gray level co-occurrence matrixes based on the third gray level co-occurrence matrixes obtains described pre-
If distinguishing threshold value.
5. the false distinguishing method of valuable document as described in claim 1, which is characterized in that obtain the image containing moire fringes
The angular second moments of the first gray level co-occurrence matrixes include:
Obtain the first gray level co-occurrence matrixes of the image containing moire fringes；
First gray level co-occurrence matrixes are normalized, and are calculated based on the first gray level co-occurrence matrixes after normalization
The angular second moment of first gray level co-occurrence matrixes.
6. a kind of false-identifying device of valuable document characterized by comprising
Acquisition module obtains the image containing moire fringes for acquiring valuable document with the imaging sensor of predetermined resolution；
First obtains module, for obtaining first gray level co-occurrence matrixes in moire fringes region in the image containing moire fringes
Angular second moment；
Second obtains module, the angular second moment of the second gray level co-occurrence matrixes for obtaining the valuable document original image；
First computing module, the angle for angular second moment and the second gray level co-occurrence matrixes based on first gray level co-occurrence matrixes
Second moment calculates the distinguishing value in the moire fringes region and original image；
Judgment module identifies the true and false of the valuable document for the distinguishing value to be compared with default threshold value of distinguishing.
7. the false-identifying device of valuable document as claimed in claim 6, which is characterized in that further include:
Second computing module has the image of moire fringes and the sample not to have the of the image of moire fringes for calculating separately sample
The angular second moment of the angular second moment of three gray level co-occurrence matrixes and the 4th gray level co-occurrence matrixes；
Third computing module, the angle for angular second moment and the 4th gray level co-occurrence matrixes based on the third gray level co-occurrence matrixes
Second moment obtains the default differentiation threshold value.
8. the false-identifying device of valuable document as claimed in claim 6, which is characterized in that described first, which obtains module, includes:
Acquiring unit, for obtaining first gray level co-occurrence matrixes in moire fringes region in the image containing moire fringes；
Computing unit, for first gray level co-occurrence matrixes to be normalized, and it is total based on the first gray scale after normalization
The angular second moment of the first gray level co-occurrence matrixes is calculated in raw matrix.
9. a kind of false-identifying device of valuable document, including memory, processor and storage are in the memory and can be in institute
State the computer program run on processor, which is characterized in that the processor is realized when executing the computer program as weighed
Benefit requires the step of any one of 1 to 5 the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 1 to 5 of realization the method.
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| RU2745032C1 (en) * | 2020-07-13 | 2021-03-18 | Общество С Ограниченной Ответственностью "Конструкторское Бюро "Дорс" (Ооо "Кб "Дорс") | Method of additional authentication of valuable document |
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| CN108573477A (en) * | 2018-03-14 | 2018-09-25 | 深圳怡化电脑股份有限公司 | Eliminate method, system and the terminal device of image moire fringes |
| CN112183574B (en) * | 2020-08-21 | 2024-05-28 | 深圳市银之杰科技股份有限公司 | File authentication and fake comparison method and device, terminal and storage medium |
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| CN103761799B (en) * | 2014-01-13 | 2016-03-30 | 李晓妮 | A kind of bill anti-counterfeit method based on texture image feature and device |
| CN104715240A (en) * | 2015-03-25 | 2015-06-17 | 华中科技大学 | Hong Kong dollar texture image version classifying method based on gray-level co-occurrence matrix |
| CN105701512A (en) * | 2016-01-14 | 2016-06-22 | 西安电子科技大学 | Image classification method based on BBO-MLP and texture characteristic |
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| RU2745032C1 (en) * | 2020-07-13 | 2021-03-18 | Общество С Ограниченной Ответственностью "Конструкторское Бюро "Дорс" (Ооо "Кб "Дорс") | Method of additional authentication of valuable document |
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