CN109448219A - Image matching method, device, bill identifier and computer readable storage medium - Google Patents
Image matching method, device, bill identifier and computer readable storage medium Download PDFInfo
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- CN109448219A CN109448219A CN201811251361.8A CN201811251361A CN109448219A CN 109448219 A CN109448219 A CN 109448219A CN 201811251361 A CN201811251361 A CN 201811251361A CN 109448219 A CN109448219 A CN 109448219A
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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
- G07D7/202—Testing patterns thereon using pattern matching
- G07D7/206—Matching template patterns
Abstract
The embodiment of the invention discloses a kind of image matching method, device, bill identifier and computer readable storage mediums.By carrying out binary conversion treatment to preset binarization threshold to image to be processed to obtain binary image, the obtained binary image is matched at least two default binary image templates respectively, to obtain at least two matching angle value, then judge whether the corresponding bill of the image to be processed is true according at least two matching angle value.Realization quickly and effectively matches the pattern on bill to identify the true and false of bill.
Description
Technical field
The present invention relates to financial security authentication detection technology fields more particularly to a kind of image matching method, device, bill to identify
Instrument and computer readable storage medium.
Background technique
Specified in China's " ticket method " " bill ", including draft, cashier's check and check, refer to it is being signed and issued by check drawer,
Arrange oneself or commission payment people when seeing ticket or the designated date is to payee or the certain amount of money of bearer's unconditional payment
Marketable securities.Due to there are more false tickets on the market, therefore bill anti-counterfeit is particularly important, currently, bill identifier is
A kind of equipment researched and developed for bill anti-counterfeit technology.
Bill identifier has the identification functions such as long short wave ultraviolet, magnetism, magnifying glass, watermark, can not only identify the people
Coin, dollar, Euro etc. currencies of the worlds, moreover it is possible to identify various bank drafts, trade acceptance, bank acceptance bill, silver
Row cashier's cheque, check voucher, cash transfer check and bankbook etc..But existing bill identifier is for some on bill
Pattern does not have matching feature, and direct images match is slow, also causes because of the inconsistency of different bill identifiers
Matching effect is bad.By taking the fluorescence Agricultural Bank of China Bureau sign on bill as an example, under different binarization thresholds, the Bureau sign figure
The width of picture is significantly different, if directly matching in a familiar manner, effect is very poor.The true ticket of difference under different bill identifiers,
Matched result difference is larger, so that a more reasonable matching degree can not be exported, it is true for being identified by images match
Fictitious bill.
Summary of the invention
The embodiment of the present invention provides a kind of image matching method, device, bill identifier and computer readable storage medium,
Realization quickly and effectively matches the pattern on bill to identify the true and false of bill.
In a first aspect, the embodiment of the invention provides a kind of image matching methods, this method comprises:
Binary conversion treatment is carried out to obtain binary image to image to be processed with default binarization threshold；
The obtained binary image is matched at least two default binary image templates respectively, to obtain
At least two matching angle value；
Judge whether the corresponding bill of the image to be processed is true according at least two matching angle value.
Second aspect, the embodiment of the invention also provides a kind of image matching apparatus, which includes:
Binary processing module, for carrying out binary conversion treatment to image to be processed with default binarization threshold to obtain two
Value image；
Images match module, for by the obtained binary image respectively at least two default binary image moulds
Plate is matched, to obtain at least two matching angle value；
Matching result confirmation module, for judging that the image to be processed is corresponding according at least two matching angle value
Whether bill is true.
The third aspect, the embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer
Program, the program realize image matching method provided in an embodiment of the present invention when being executed by processor.
Fourth aspect processor and is stored in the embodiment of the invention also provides a kind of bill identifier, including memory
On memory and such as this hair can be realized when the computer program of processor operation, the processor execute the computer program
The image matching method that bright embodiment provides.
The embodiment of the present invention, by carrying out binary conversion treatment to preset binarization threshold to image to be processed to obtain two-value
Change image, the obtained binary image is matched at least two default binary image templates respectively, to obtain
Whether at least two matching angle value, then judge the corresponding bill of the image to be processed according at least two matching angle value
It is true.Realization quickly and effectively matches the pattern on bill to identify the true and false of bill.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of image matching method provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of another image matching method provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of another image matching method provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of image matching apparatus provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of bill identifier provided in an embodiment of the present invention.
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 stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of flow diagram of image matching method provided in an embodiment of the present invention, and this method can be by this hair
Bill identifier that bright embodiment provides executes, which can be used software and/or hardware mode and realize, this method
Specifically comprise the following steps:
Step 110 carries out binary conversion treatment to image to be processed with default binarization threshold to obtain binary image；
In the present embodiment, image to be processed refers to the bill images including fluorescent image (such as Bank of China's Bureau sign), the ticket
It can be the corresponding image of multiple wave bands, such as visible images, ultraviolet light image according to image.Binary image is a black and white
Bill images, corresponding Bureau sign image are white or black.Default binarization threshold preferably at most binarization threshold.
Step 120 carries out the obtained binary image at least two default binary image templates respectively
Match, to obtain at least two matching angle value；
In the present embodiment, at least two binary image templates are preset, which is the two-value for there was only Bureau sign image
Change image, size is similar to the size of Bureau sign pattern in bill images.The generation method of default binary image template is as follows: choosing
Multiple bills are taken, sample Bank of China's Bureau sign pattern, respectively therefrom to obtain the image that multiple only have Bank of China's Bureau sign pattern；
Then binary conversion treatment is carried out to obtain multiple binary images with different default binarization thresholds to any image；Again
Image averaging value is asked to obtained multiple binary images to obtain a binary image template.In this way, by multiple only have in
The image of bank, state Bureau sign pattern is according to said method handled, and obtains multiple binary image templates.
In addition, following method also can be used in the generation of default binary image template: for example having sampled 12 only China
The image of bank's Bureau sign pattern is divided into 4 groups for its every 3 one group, uses same default binaryzation threshold to this 4 groups of Bureau sign images
Value is handled to obtain 4 groups of binary images, finally seeks image averaging value to 4 groups of binary images respectively, the figure that will be obtained
Picture average value obtains 4 binary image templates as binary image template herein.
Illustratively, the binary image (bill images including Bureau sign image) that respectively obtains step 110 with only
The binary image template of Bureau sign image is matched, and multiple matching angle value are obtained, to calculate the matching degree of the two, Jin Ergen
The true and false of bill is judged according to the matching degree.Matching angle value described herein can be approximate number or score, such as 90%, 4/5.This
Specific matching process will be told about in invention other embodiments, this will not be repeated here.
Step 130 judges whether the corresponding bill of the image to be processed is true according at least two matching angle value.
In the present embodiment, using the method simply averaged, the average value of multiple matching angle value is calculated, then should
Compared with preset threshold, preset threshold herein can suitably be worth average value according to the anti-fake precision setting of bill identifier.?
When the average value reaches preset threshold, determine that the corresponding bill of the image to be processed is true；It is not up in the average value
When preset threshold, determine that the corresponding bill of the image to be processed is false.Add in addition, can also be used in other embodiments of the invention
The method of weight average calculates the average value of multiple matching angle value.
The technical solution of the present embodiment, by carrying out binary conversion treatment to preset binarization threshold to image to be processed to obtain
To binary image, the obtained binary image is matched at least two default binary image templates respectively,
To obtain at least two matching angle value, the corresponding ticket of the image to be processed then is judged according at least two matching angle value
According to whether being true.Realization quickly and effectively matches the pattern on bill to identify the true and false of bill.
Fig. 2 is the flow diagram of another image matching method provided in an embodiment of the present invention, referring to fig. 2, this method
Further comprise following steps:
Step 210 does ranks projection to the binary image to obtain region to be matched in the binary image
Boundary value.
Further, the refinement step of step 210 includes:
S1: to the binary image do row projection with obtain the binary image row projection and；
S2: to the binary image do column projection with obtain the binary image column projection and；
S3: obtain the row projection and and column projection and be respectively less than or be equal to preset boundary threshold value when, respectively
It records the row projection and and column project and corresponding number；
S4: according to the boundary value in region to be matched in the determining binary image of the number, wherein the boundary value
Including upper and lower, left and right boundary value.
In the present embodiment, region to be matched refers to Bureau sign image, by determining the Bureau sign image in binary image
Boundary value is up and down with the position of the determining Bureau sign image.
The specific implementation process is as follows:
1) the row projection and column projection of the binary image, are calculated, wherein the row is projected as the binary image
In every row pixel the sum of gray value, described arrange be projected as the sum of the gray value of each column pixel in the binary image.
Illustratively, if doing capable projection with every m behavior unit, column projection is done for unit with every n column, then every m row pixel
The sum of gray value for row projection and, the sum of gray value of every n column pixel be column projection and, wherein m >=1, m are natural number,
N >=1, n are natural number.
2) K value (sum of the grayscale values of K target pixel points), are preset and are used as boundary threshold, wherein target pixel points are to go
The boundary pixel point of emblem image.When the gray value of row projection is less than or equal to K, it is believed that reach row bound range, really with this
Determine up-and-down boundary；When the gray value of column projection is less than or equal to K, it is believed that reach column bounds, determine left and right side with this
Boundary.
Illustratively, row is projected, successively judge from top to bottom the projection of each row with the presence or absence of row projection and be less than or
Person is equal to first threshold, and if it exists, then records the secondary row and projects corresponding line number, wherein each row be projected as from top to bottom according to
Secondary to do capable projection to every m row, m >=1, m are natural number.
Illustratively, for column project, from left to right successively judgement every time column projection with the presence or absence of column projection and be less than or
Person is equal to second threshold, and if it exists, then records this time column and projects corresponding row number, wherein arrange every time be projected as from left to right according to
Secondary to do column projection to every n column, n >=1, n are natural number.
It should be noted that number is the line number and row number of record, first threshold and second threshold are preset boundary threshold k
Value, first threshold and second threshold can be identical, can be different.
3) coboundary, is determined according to the minimum value of line number, lower boundary is determined according to the maximum value of line number；Most according to row number
It is big to be worth determining right margin, left margin is determined according to the minimum value of row number.
According to obtained boundary value up and down, the position of Bureau sign image can be determined.
The technical solution of the present embodiment can effectively reduce image by determining the region to be matched in binary image
The anti-of bill identifier also can be improved to reduce the consume of bill identifier to extend the service life of equipment in matching times
Spurious accuracy.
Fig. 3 is the flow diagram of another image matching method provided in an embodiment of the present invention, referring to Fig. 3, this method
Further comprise following steps:
Step 310 determines region to be matched in the binary image according to the boundary value；
Step 320, the first pixel quantity for obtaining the region to be matched；
Step 330 respectively carries out the second pixel quantity of first pixel quantity and default binary image template
Compare, to obtain the difference of the first, second pixel quantity；
Step 340 determines matching angle value according to the difference.
In the present embodiment, by the pixel quantity of the Bureau sign image pixel quantity with multiple default binary image templates respectively
It is compared, to obtain multiple pixel quantity differences, which can be percentage, such as 10%, then be determined according to the difference
Corresponding matching angle value, for example, difference is 10%, then matching angle value is 90%, in this way, multiple differences correspond to multiple matching degrees
Value.
Further, in images match, in order to reduce the inconsistency between different bill identifiers, Matching band can be treated
The image in domain carries out histogram stretching, then carries out images match again.
In addition, further decreasing different bills because the image and template in region to be matched are all binary images and identifying
Inconsistency between instrument treats matching area and default binary image template using the progress of normalized square deviation matching method
Match, method is simple and matching speed is fast.
Pixel quantity matching, is applied to the matching of binary image by the technical solution of the present embodiment, and this method simply has
Effect, and matching speed is fast, and the anti-spurious accuracy of bill identifier can be improved.
Fig. 4 is a kind of structural schematic diagram of image matching apparatus provided in an embodiment of the present invention, which is adapted for carrying out
The image matching method that any embodiment of that present invention provides, as shown in figure 4, the device includes: binary processing module 410, figure
As matching module 420 and matching result confirmation module 430.
Binary processing module 410, for carrying out binary conversion treatment to image to be processed with default binarization threshold to obtain
To binary image；
Images match module 420, for by the obtained binary image respectively at least two default binary pictures
As template is matched, to obtain at least two matching angle value；
Matching result confirmation module 430, for judging the image pair to be processed according at least two matching angle value
Whether the bill answered is true.
Image matching apparatus provided in this embodiment, by carrying out binaryzation to preset binarization threshold to image to be processed
Processing to obtain binary image, by the obtained binary image respectively at least two default binary image templates into
Row matching, to obtain at least two matching angle value, then judges the image to be processed according at least two matching angle value
Whether corresponding bill is true.Realization quickly and effectively matches the pattern on bill to identify the true and false of bill.
On the basis of the above embodiments, further includes:
Boundary value confirmation module, for the binary image do ranks projection with obtain in the binary image to
The boundary value of matching area.
On the basis of the above embodiments, boundary value confirmation module further include:
To the binary image do row projection with obtain the binary image row projection and；
To the binary image do column projection with obtain the binary image column projection and；
Obtain the row projection and and column projection and be respectively less than or be equal to preset boundary threshold value when, record respectively
The row projects and and column project and corresponding number；
According to the boundary value in region to be matched in the determining binary image of the number, wherein the boundary value packet
Include upper and lower, left and right boundary value.
On the basis of the above embodiments, images match module 420 includes:
Region confirmation module to be matched, for determining the area to be matched in the binary image according to the boundary value
Domain；
The optimal module of images match, for by the region to be matched respectively at least two default binary image templates
It is matched, to obtain at least two matching angle value.
On the basis of the above embodiments, the optimal module of images match is also used to:
Obtain first pixel quantity in the region to be matched；
First pixel quantity is compared with the second pixel quantity of default binary image template respectively, to obtain
Take the difference of the first, second pixel quantity；
Matching angle value is determined according to the difference.
On the basis of the above embodiments, flat using normalization to the region to be matched and default binary image template
Variance matching method is matched.
On the basis of the above embodiments, matching result confirmation module 430 is also used to:
Calculate the average value of at least two matching angle value；
When the average value reaches preset threshold, determine that the corresponding bill of the image to be processed is true；
When the average value is not up to preset threshold, determine that the corresponding bill of the image to be processed is false.
The embodiment of the invention provides a kind of computer readable storage mediums, are stored thereon with computer program, the program
The image matching method provided such as all embodiments of the invention is realized when being executed by processor: that is, the program is held by processor
Row Shi Shixian: it by carrying out binary conversion treatment to preset binarization threshold to image to be processed to obtain binary image, incites somebody to action
To the binary image matched respectively at least two default binary image templates, to obtain at least two matchings
Then angle value judges whether the corresponding bill of the image to be processed is true according at least two matching angle value.
It can be using one or any combination of at least two computer-readable media.Computer-readable medium can be
Computer-readable signal media or computer readable storage medium.Computer readable storage medium for example can be --- but not
Be limited to --- electricity, magnetic, optical, electromagnetic, infrared ray or semiconductor system, device or device, or any above combination.Meter
The more specific example (non exhaustive list) of calculation machine readable storage medium storing program for executing includes: being electrically connected with one or at least two conducting wires
Connect, portable computer diskette, hard disk, random access memory (RAM), read-only memory (ROM), erasable type may be programmed it is read-only
Memory (EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), light storage device, magnetic memory
Part or above-mentioned any appropriate combination.In this document, computer readable storage medium, which can be, any include or stores
The tangible medium of program, the program can be commanded execution system, device or device use or in connection.
Computer-readable signal media may include in a base band or as carrier wave a part propagate data-signal,
Wherein carry computer-readable program code.The data-signal of this propagation can take various forms, including --- but
It is not limited to --- electromagnetic signal, optical signal or above-mentioned any appropriate combination.Computer-readable signal media can also be
Any computer-readable medium other than computer readable storage medium, which can send, propagate or
Transmission is for by the use of instruction execution system, device or device or program in connection.
The program code for including on computer-readable medium can transmit with any suitable medium, including --- but it is unlimited
In --- wireless, electric wire, optical cable, RF etc. or above-mentioned any appropriate combination.
The computer for executing operation of the present invention can be write with one or more programming languages or combinations thereof
Program code, described program design language include object oriented program language-such as Java, Smalltalk, C++,
It further include conventional procedural programming language-such as " C " language or similar programming language.Program code can be with
It fully executes, partly execute on the user computer on the user computer, being executed as an independent software package, portion
Divide and partially executes or held on remote computer or bill identifier completely on the remote computer on the user computer
Row.In situations involving remote computers, remote computer can pass through the network of any kind --- including local area network
(LAN) or wide area network (WAN)-is connected to subscriber computer, or, it may be connected to outer computer (such as utilize internet
Service provider is connected by internet).
Fig. 5 is a kind of structural schematic diagram of bill identifier provided in an embodiment of the present invention, which can integrate
Image matching apparatus provided in an embodiment of the present invention.Referring to Fig. 5, bill identifier 500 may include: memory 510, processor
520 and the computer program that is stored on memory 510 and can be run in processor 520, the processor 520 execute the meter
Image matching method as described in the embodiments of the present invention is realized when calculation machine program.
Bill identifier provided in an embodiment of the present invention, by carrying out two-value to preset binarization threshold to image to be processed
Change processing to obtain binary image, by the obtained binary image respectively at least two default binary image templates
It is matched, to obtain at least two matching angle value, then judges the figure to be processed according at least two matching angle value
As whether corresponding bill is true.Realization quickly and effectively matches the pattern on bill to identify the true and false of bill.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of image matching method characterized by comprising
Binary conversion treatment is carried out to obtain binary image to image to be processed with default binarization threshold；
The obtained binary image is matched at least two default binary image templates respectively, to obtain at least
Two matching angle value；
Judge whether the corresponding bill of the image to be processed is true according at least two matching angle value.
2. the method according to claim 1, wherein carrying out two-value to image to be processed with default binarization threshold
After changing processing to obtain binary image, further includes:
Ranks projection is done to obtain the boundary value in region to be matched in the binary image to the binary image.
3. according to the method described in claim 2, it is characterized in that, to do ranks projection to the binary image described to obtain
The boundary value in region to be matched in binary image, comprising:
To the binary image do row projection with obtain the binary image row projection and；
To the binary image do column projection with obtain the binary image column projection and；
Obtain the row projection and and column projection and be respectively less than or be equal to preset boundary threshold value when, respectively record described in
Row projects and and column project and corresponding number；
The boundary value in region to be matched in the binary image is determined according to the number, wherein the boundary value include it is upper,
Under, left and right boundary value.
4. according to the method described in claim 3, it is characterized in that, by the obtained binary image respectively at least two
Default binary image template is matched, to obtain at least two matching angle value, comprising:
The region to be matched in the binary image is determined according to the boundary value；
The region to be matched is matched at least two default binary image templates respectively, to obtain at least two
With angle value.
5. according to the method described in claim 4, it is characterized in that, the region to be matched is preset two at least two respectively
Value image template is matched, to obtain at least two matching angle value, comprising:
Obtain first pixel quantity in the region to be matched；
First pixel quantity is compared with the second pixel quantity of default binary image template respectively, to obtain
One, the difference of the second pixel quantity；
Matching angle value is determined according to the difference.
6. according to the method described in claim 4, it is characterized in that, to the region to be matched and default binary image template
It is matched using normalized square deviation matching method.
7. -6 any method according to claim 1, which is characterized in that judge institute according at least two matching angle value
State whether the corresponding bill of image to be processed is true, comprising:
Calculate the average value of at least two matching angle value；
When the average value reaches preset threshold, determine that the corresponding bill of the image to be processed is true；
When the average value is not up to preset threshold, determine that the corresponding bill of the image to be processed is false.
8. a kind of image matching apparatus characterized by comprising
Binary processing module, for carrying out binary conversion treatment to image to be processed with default binarization threshold to obtain binaryzation
Image；
Images match module, for by the obtained binary image respectively at least two default binary image templates into
Row matching, to obtain at least two matching angle value；
Matching result confirmation module, for judging the corresponding bill of the image to be processed according at least two matching angle value
It whether is true.
9. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
The image matching method as described in any in claim 1-7 is realized when row.
10. a kind of bill identifier, which is characterized in that including memory, processor and storage on a memory and can handled
The computer program of device operation, the processor are realized as described in any in claim 1-7 when executing the computer program
Image matching method.
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| CN110689659A (en) * | 2019-09-29 | 2020-01-14 | 广州国瀚计算机通讯科技有限公司 | White watermark auxiliary authenticity identifying method and device based on template matching |
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Application publication date: 20190308 |