CN106650874B - A kind of display, method for anti-counterfeit and the device of paper fibre feature - Google Patents
A kind of display, method for anti-counterfeit and the device of paper fibre feature Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
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- G06Q30/00—Commerce
- G06Q30/018—Certifying business or products
- G06Q30/0185—Product, service or business identity fraud
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Abstract
The present invention relates to display, method for anti-counterfeit and the devices of a kind of paper fibre feature.The present invention acquires the electronic image of the specific region of paper first；Then template matching is carried out using electronic image of the fibre image template to acquisition, characteristic point corresponding greater than the electronic image of given threshold with fibre image template similarity is chosen to screen obtained characteristic point as paper fibre image characteristic point, and according to the priority of setting；Finally the characteristic information of the characteristic point after screening is encoded, form two-dimensional encoded figure corresponding with paper fibre feature, the feature viewing area of the code pattern shows symbol using characteristic point corresponding with use the Template Information of characteristic point, and characteristic point display symbol is for showing the thickness information in fiber pattern direction at characteristic point position, fiber.The present invention can obtain accurate, significant paper features, and paper features are shown by two dimensional code, and user can the convenient feature that paper is directly judged according to obtained two-dimensional encoded figure.
Description
Technical field
The present invention relates to display, method for anti-counterfeit and the devices of a kind of paper fibre feature, belong to image recognition coding techniques
Field.
Background technique
Recent internet finance rapid development, online payment, network trading, Web bank and the e-commerce of diversified forms
Service application and give birth to, building the safe mutual trust of both parties ID authentication mechanism become extremely important, from currently used fortune
From the point of view of row mechanism and technology path, that there are authentications is difficult, safety is not high, process of exchange is frequent, management cost is high and
Electronic transaction the problems such as there are security breaches.In this technical field, the space that is greatly improved.Such as digital watermarking or number
The transaction medium such as check, electronic invoice, electronic contract, special note of word signature exist authentication safety issue and
It is replicated the potential safety problem of bogus attack.And it circulates and the two-dimensional barcode information on internet, electronic signature scan code, electronics
The electronic certificates information such as label, software key sharing are since there is the risk of no evidence in kind, the party concerned that trades is in identity
There are still security breaches in confirmation.This security breaches can be solved by identifying to paper, but official document, data, bill
And the important information on the paper materials such as certificate generally use plain paper mode with an official seal affixed carry out it is anti-fake, due to office
The counterfeit of paper material information is increasingly easy, anti-fake to become more and more difficult, and leading to this mode also becomes dangerous.
Summary of the invention
The object of the present invention is to provide a kind of display methods of paper fibre feature, with solve current paper fibre feature without
The problem of method is intuitively shown；The present invention also provides a kind of method for anti-counterfeit based on paper fibre feature, to realize to paper
Identification.
The present invention provides a kind of display methods of paper fibre feature to solve above-mentioned technical problem, the display methods packet
The step of including is as follows:
1) electronic image of the specific region of paper is acquired；
2) template matching is carried out using electronic image of the fibre image template to acquisition, chosen similar to fibre image template
Degree is greater than the corresponding characteristic point of electronic image of given threshold as paper fibre image characteristic point；
3) obtained characteristic point is screened according to the priority of setting；
4) characteristic information of the characteristic point after screening is encoded, is formed corresponding with paper fibre feature two-dimensional encoded
The feature viewing area of figure, the code pattern shows symbol using characteristic point corresponding with the used Template Information of characteristic point, described
Characteristic point shows that symbol is used to show the thickness information in fiber pattern direction at characteristic point position, fiber.
Further, the two-dimensional encoded figure also includes at least angle finger URL, acquisition position symbol, central campus certainly position
One in symbol, side calibration areas and feature one-dimensional coding area, the angle finger URL is used for the two-dimensional encoded figure of locating paper sheets feature
One jiao；The acquisition position symbol is used to indicate the acquisition position of paper fibre image；The quasi- finger URL of the central campus
Encoded block position correction for the two-dimensional encoded figure of paper features；The side calibration areas is for correcting paper features two dimension volume
Encoded block position in code figure；The feature one-dimensional coding area is for showing feature one-dimensional coding.
Further, the feature one-dimensional coding is for encoding the characteristic information for the characteristic point screened, often
The encoded information of a characteristic point includes at least template number, abscissa and ordinate used in characteristic point.
Further, this method further includes carrying out coarse and standardization processing on scale to characteristic information: will be adopted
The electronic image of collection carries out piecemeal, and forms the new scale coordinate system of the serial number numerical value of piecemeal arrangement from left to right from top to bottom；
The center of connected domain in the characteristic point bianry image obtained in step 2) is fallen into image block area coordinate as new feature
Point position coordinates, obtained standardization characteristic point coordinate (Xτ, Yτ) are as follows:
Xτ=aτ-x0,Yτ=bτ-y0, τ=1 ... E
Wherein (x0,y0) be all blocking characteristic points centroid；(aτ,bτ) be the τ piecemeal piecemeal coordinate, E be sort
Remaining connected domain number after screening.
Further, the priority in step 3) uses following rule:
A. the priority of the big characteristic point of template width is greater than the small characteristic point priority of template width；
B. the big priority of connected domain area locating for characteristic point is greater than the small characteristic point priority of connected domain area；
If c. connected domain area is identical, priority from top to bottom is determined according to the precedence of appearance from left to right.
The present invention also provides a kind of display device of paper fibre feature, which includes acquisition module, matching
Module, screening module and coding display module,
The acquisition module is used to acquire the electronic image of the specific region of paper；
The matching module is used to carry out template matching to the electronic image of acquisition using fibre image template, choose and
Fibre image template similarity is greater than the corresponding characteristic point of electronic image of given threshold as paper fibre image characteristic point；
The screening module is for screening obtained characteristic point according to the characteristic point priority of setting；
The coding display module is formed fine with paper for encoding to the characteristic information of the characteristic point after screening
The feature viewing area of the corresponding two-dimensional encoded figure of dimensional feature, the code pattern uses spy corresponding with the used Template Information of characteristic point
A sign point display symbol, the characteristic point show symbol be used to show fiber pattern direction at characteristic point position, fiber it is thick
Thin information.
The present invention also provides a kind of method for anti-counterfeit based on paper fibre feature, the step of method for anti-counterfeit, is as follows:
1) electronic image of the specific region of paper is acquired；
2) template matching is carried out using electronic image of the fibre image template to acquisition, chosen similar to fibre image template
Degree is greater than the electronic image of given threshold as paper fibre characteristics of image；
3) obtained characteristic point is screened according to the priority of characteristic point；
4) characteristic point after screening is encoded, forms two-dimensional encoded figure corresponding with paper fibre feature, the coding
The feature viewing area of figure shows symbol using characteristic point corresponding with the used Template Information of characteristic point, and the characteristic point is shown
Symbol is used to show the thickness information in fiber pattern direction at characteristic point position, fiber；
5) by obtain it is two-dimensional encoded print on shielded paper, compare and print on paper features two on paper
The feature viewing area in code pattern is tieed up, if display symbolic construction having the same combines, proves that the paper is without overscanning
With the paper after duplicating.
Further, the two-dimensional encoded figure also includes at least angle finger URL, acquisition position symbol, central campus certainly position
One in symbol, side calibration areas and feature one-dimensional coding area, the angle finger URL is used for the two-dimensional encoded figure of locating paper sheets feature
One jiao；The acquisition position symbol is used to indicate the acquisition position of paper fibre image；The quasi- finger URL of the central campus
Encoded block position correction for the two-dimensional encoded figure of paper features；The side calibration areas is for correcting paper features two dimension volume
Encoded block position in code figure；The feature one-dimensional coding area is for showing feature one-dimensional coding.
Further, this method further includes carrying out coarse and standardization processing on scale to characteristic information: will be adopted
The electronic image of collection carries out piecemeal, and forms the new scale coordinate system of the serial number numerical value of piecemeal arrangement from left to right from top to bottom；
The center of connected domain in the characteristic point bianry image obtained in step 2) is fallen into image block area coordinate as new feature
Point position coordinates, obtained standardization characteristic point coordinate (Xτ, Yτ) are as follows:
Xτ=aτ-x0,Yτ=bτ-y0, τ=1 ... E
Wherein (x0,y0) be all blocking characteristic points centroid；(aτ,bτ) be the τ piecemeal piecemeal coordinate, E be sort
Remaining connected domain number after screening.
Further, the priority in the step 3) follows following criterion:
A. the priority of the big characteristic point of template width is greater than the small characteristic point priority of template width；
B. the big priority of connected domain area locating for characteristic point is greater than the small characteristic point priority of connected domain area；
If c. connected domain area is identical, priority from top to bottom is determined according to the precedence of appearance from left to right.
The beneficial effects of the present invention are: the present invention acquires the electronic image of the specific region of paper first；Then fibre is utilized
It ties up image template and template matching is carried out to the electronic image of acquisition, choose and be greater than given threshold with fibre image template similarity
The corresponding characteristic point of electronic image is as paper fibre image characteristic point, and according to the characteristic point priority of setting to obtained spy
Sign point is screened；Finally the characteristic information of the characteristic point after screening is encoded, is formed corresponding with paper fibre feature
Two-dimensional encoded figure, the feature viewing area of the code pattern is using characteristic point corresponding with the used Template Information of characteristic point display symbol
Number, characteristic point shows that symbol is used to show the thickness information in fiber pattern direction at characteristic point position, fiber.The present invention can
Accurate, significant paper features are obtained, and paper features are intuitively shown by two dimensional code, user can convenient basis
Obtained two-dimensional encoded figure directly judges the feature of paper.
In addition, the two-dimensional encoded figure that will also obtain of the invention prints on shielded paper, comparison prints on paper
The feature viewing area in the two-dimensional encoded figure of paper features on, if display symbolic construction having the same combines, proving should
Paper is to realize without the paper after overscanning and duplicating to the anti-fake of paper, which can be used in internet finance
Copy-resistant digital watermark, single effective digital signature, electronic real object mixing invoice, contract and bank paying safety etc. neck
The confidence level of transaction square authentication at that time is improved in domain.
Detailed description of the invention
Fig. 1 is the fibre image of paper；
Fig. 2 is standard form basic parameter schematic diagram；
Fig. 3 is the standard form image and number schematic diagram generated；
Fig. 4 is the connected domain screening process schematic diagram of characteristic point bianry image；
Fig. 5 is paper features one-dimension code coding schematic diagram；
Fig. 6 is the two-dimensional encoded schematic diagram of paper features；
Fig. 7-a is Angle Position two-dimensional encoded figure in paper lower-left in the embodiment of the present invention；
Fig. 7-b is the two-dimensional encoded figure of paper lower right position in the embodiment of the present invention；
Fig. 8 is the anti-fake distribution principle schematic diagram of anti-reprography；
Fig. 9 is applied to the schematic illustration of mixed electronic contract, electronic invoice.
Specific embodiment
A specific embodiment of the invention is described further with reference to the accompanying drawing.
A kind of embodiment of the display methods of paper fibre feature of the present invention
The present invention acquires the electronic image of the specific region of paper first；Then using fibre image template to the electricity of acquisition
Subgraph carries out template matching, chooses characteristic point corresponding greater than the electronic image of given threshold with fibre image template similarity
As paper fibre image characteristic point；Finally obtained characteristic point is screened according to the characteristic point priority of setting, thus
Identify the fiber characteristics of paper.
1. acquiring the electronic image of the specific region of paper.
Paper features of the invention refer to from paper features region, amplify through optical microphotograph lens, are adopted by imaging sensor
The characteristics of image of paper fibre in the electronic image of collection.Specific region is limited to (optional apart from two edge certain distances of paper
Select two edge 10mm of distance) parallel lines crosspoint position, the region that size is about 0.3*0.3mm.Such defined feature
The reason of extracting object is to accommodate manually and the precision of locating paper sheets is about in 0.1mm or so, and the physics of optical microphotograph amplifies
Multiple is substantially are as follows: the region of 6mm/0.3mm, i.e., 20 times or so, wherein 6mm is the width of imaging plate, and 0.3mm is microscopic region
Actual size.Assuming that image sensor resolutions use 640*480, if effective district is 480*480, i.e., width is 480 samplings
Point.If being greater than the wide fiber of 10 pixels in image can detect and recognize, the fiber width of practical detectable identification is 10*
0.3mm/480=0.006mm, that is to say, that bright to recognize the fiber greater than 6 microns of thicknesses.
Paper fibre image definition are as follows: the fiber in paper is projected by light, is acquired through imaging sensor, the ash obtained
Two curves being parallel to each other are formed by by the variation of gray scale power in degree image, the fiber imaging as in paper.It hands in length and breadth
Wrong fiber imaging constitutes fibre image, as shown in Figure 1.The image is apart from paper lower edge 10mm and left margin 10mm
Point of intersection, area are about the region 0.3mm*0.3mm acquired image.Therefore feature extraction object set by the present invention are as follows:
Greater than 6 microns of thicknesses paper fibre on 6mm or so imaging panel imaging.
2. constructing image template
Changeless stable paper identity characteristic is obtained from numerous and disorderly fibre image great difficulty, adopts
With different image processing techniques and Feature Extraction Technology, different characterization results can be obtained, can not be formed it is unique, one
The identity characteristic encoded information of cause.For this purpose, the present invention uses self-structuring fiber characteristics image template, by the fiber of self-structuring standard
Template image carries out images match to acquired image, to extract paper fibre characteristics of image.
Its physical characteristic of fiber and its characteristics of image in imaging in paper are closely related, local fiber image
Most apparent physical features be: width, length, direction and light and shade variation, as shown in Fig. 2, standard feature matching template is such as
Shown in Fig. 2, wherein w indicates that the imaging width of fiber, the practical diameter for reflecting fiber are mentioned to reduce by standard form matching
The ambiguousness of feature is taken, it is specified that using discrete value, setting only considers to use the fiber image width of these three diameters as standard fibre
Imaging width is tieed up, d indicates the width of standard form, sets d=6w, indicates the extension of fiber in Current standards template image unit
Direction also uses the representation of discrete value, only takes setting number direction, only takes 12 radian directions, θ ∈ in the present embodiment
Φ:
Φ={ θj| j=1,2 ... 12 }={ 7 π/3 3 of π/12 2 π/4 5 of the π/12 of π/3 5 of π/4 of π/6 of 0 π/12 pi/2
π/6 11π/12}
The present invention uses the Gaussian hat mathematical model of two back-offs, and passes through rotation, Zoom method synthetic fibers Prototype drawing
Picture, obtained fibrous template iconic model are as follows:
Wherein (x, y)=(x ' cos θ+y ' sin θ ,-x ' sin θ+y ' cos θ), θ ∈ Φ (2)
Assuming that sharing 3 kinds of fiber widths and 12 kinds of machine directions, 36 standard fibers template images, formula are collectively generated
(1) μ is the gray average of entire sampled images effective coverage in:
The gray scale for the sampled point that wherein f (i, j) imaging sensor obtains, N is efficiently sampling width direction sampling number, public
η is contrast of the gray scale in fiber sideline relative to template image gray average, setting are as follows: η=20% in formula (1)；Formula (1)
Middle c1And c2The coordinate for being two gray scale the lowest point is actually two respective mean values of Gaussian curve, the Gauss of formula (1) overturning
Cap come simulate fiber imaging two dark sides, c1And c2The occurrence for being determines by the centre coordinate and fiber width of template image,
That is:
c1=xm-w/2
c2=xm+w/2
Gauss variances sigma in formula (1) are as follows: σ=w/7, (x ', y ') is the coordinate before rotation, after (x, y) is image rotation
Coordinate, rotation angle are θ, θ ∈ Φ, that is, rotate angle radian value according to the radian value in above-mentioned 12 direction.
When choosing 3 kinds of fiber widths and 12 kinds of machine directions, it can get 36 standard form images, as shown in Fig. 2, word
Accord with B0~B35Subscript statement template number, the template of three kinds of width: 12 master dies of 0~11 number is listed in figure altogether
Plate fiber width is maximum；The template fiber width of 12~23 numbers is placed in the middle, and 24~No. 35 template fiber widths are minimum.
When being screened using above-mentioned standard template, it is necessary to set priority, the priority of template determines the choosing of feature
Order is taken and accepted or rejected, chooses the good feature of stability to be preferential, the feature of the high template extraction of use priority can preferentially be chosen,
According to the standard fibers template image and its coding rule generated, the prioritization method of template is: template width is identical then
Priority is identical；Small template priority is numbered greater than number large form priority.
3. the standard form using construction extracts paper image feature.
It is matched point by point in the effective coverage (M × N) of the paper fibre image of acquisition using the standard form of building
It obtains.Assuming that template image matrix BkIt indicates, the image grayscale matrix X at corresponding scan position(x,y)It indicates, subscript (x,
It y) is matching centre coordinate, the then similarity of template and image are as follows:
The similarity of the template being calculated and image is compared with given threshold, sets threshold when taking similarity to be greater than
The point of value is as primary features point set
In view of the normalization of feature extraction, to avoid ambiguity, the present invention is using unified standard parameter, given threshold T=
0.5；Matching range parameter M=640, N=480.The image and this feature point at characteristic point coordinate position in set of characteristic points
Used image template image has similar structure feature.One standard form of every use, which carries out matching scanning, can all generate
One characteristic point position bianry image, 36 matches criteria templates can then generate 36 characteristic point bianry images.Characteristic point is two
It will form some internal connections region isolated from one another in value image, these connected regions be numbered, D connected region is equipped with
Domain is usedIt indicates, a=1,2 ..., D, the maximum gauge of all connected domains are as follows:
Wherein Δ x and Δ y respectively indicates the maximum width and height of characteristic point connected region, by the diameter of connected region by
Arrive greatly it is small be ranked up, only retain the forward several connected domains of sorting, abandon the small connected domain of remaining diameter, it is straight by giving up
The method of the smaller connected domain of diameter can enhance the stability for extracting feature, feature in bianry image after ranked screening in the present embodiment
The variation of point connected domain is as shown in Figure 4.
4. pair characteristic point extracted carries out standardization processing.
To further enhance feature stability, influence of the disturbance of reduction Image Acquisition point position to feature stability will
The location coordinate information of features described above point connected domain carries out coarse on scale, and detailed process is as follows:
By whole image pickup area blocking, i.e., image acquisition areas is divided into 15 rows × 15 and arranges a biggish piecemeal,
The size of each segmented areas is the width and height that (N/15) × (M/15), N and M are original image.And formed with from up to
Under from left to right piecemeal arrangement serial number numerical value new scale coordinate system.Then the characteristic information of template extraction is resettable are as follows:
In former characteristic point bianry image, the above-mentioned image block area coordinate that the center of gravity of connected domain is fallen into, as new characteristic point
Position coordinates, position coordinate value is that above-mentioned piecemeal is formed by new coordinate system coordinate value, by locating piecemeal coordinate value together with institute
The template number used is referred to as " blocking characteristic point " as new characteristic point information, the present invention, referred to as " characteristic point ".It is aobvious
So, the characteristic information of blocking characteristic point includes: used in the location coordinate information and generation bianry image under new coordinate system
Template number information.
If remaining connected domain number, if E=16, calculates the weight of each connected region to standardize for E after sequence screening
Heart coordinate judges the above-mentioned image block fallen into.If falling into the piecemeal of a row b column, being indicated with piecemeal coordinate (a, b) should
The location information of blocking characteristic, the standardization of blocking characteristic point position coordinates are as follows:
Xτ=aτ-x0,Yτ=bτ-y0, τ=1 ... E
(x in above formula0,y0) be all blocking characteristic points centroid；Piecemeal coordinate (ai,bi) it is normalized after standardized
Change characteristic point coordinate (Xτ, Yτ)。
Paper features point can indicate with the following method: the image acquired every time only takes E blocking characteristic point, the feature of paper
Point all information may be expressed as:
δτ(k,s,(Xτ,Yτ)), k=0,1 ..., 35, τ=1,2 ..., E
Wherein k is used template BkTemplate number, s be locating connected domain area, (Xτ,Yτ) it is standardization point
Block feature point coordinate.
5. screening paper features point
The screening of paper features point is determination after the priority ranking by characteristic point, and priority is indicated with function O, paper
Open the priority rule of characteristic point are as follows:
A. the priority of the big characteristic point of template width is greater than the small characteristic point priority of template width.For example, characteristic point
δ1Used template number is k1, template width wk1, locating connected domain area is s1；Characteristic point δ2Used template is compiled
Number be k2, template width wk2, locating connected domain area is s2；If template width wk1> wk2, then P (δ1(k1,s1)) > P (δ2
(k2,s2))。
B. the big priority of connected domain area locating for characteristic point is greater than the small characteristic point priority of connected domain area.
C. priority from top to bottom is determined according to the precedence of appearance from left to right if connected domain area is identical.
According to the priority principle of characteristic point, treatment on special problems is as follows:
If i. connected domain barycentric coodinates fall into identical piecemeal, the small characteristic point of connected domain area is directly dropped.
Ii. the different connected region centers of gravity that same template generates fall into identical piecemeal, first judge connected domain area, if
Area is identical, then compares template width.Template width is small to be rejected；If the two is all the same, determined according to the order of appearance,
What is first occurred is retained.
According to features described above point priority principle and treatment on special problems method, to the characteristic point of reservation minor sort again, make
It obtains characteristic point serial number and is equal to its priority, if with P (δτ) indicate characteristic point δτPriority, then:
P(δ1) > P (δ2) > ... > P (δE)
Obviously, the small characteristic point priority of serial number is higher.
6. the paper features of characteristic point encode after pair screening, the two-dimensional encoded figure of paper, the feature of the code pattern are formed
Viewing area shows symbol using characteristic point corresponding with the used Template Information of characteristic point, and the characteristic point shows that symbol is used for
The thickness information in fiber pattern direction, fiber at display characteristic point position.
1) paper features after screening are encoded using one-dimension code.
Paper features one-dimensional coding is encoded to the characteristic information of features described above point, according to the serial number of characteristic point or excellent
First grade determines coding precedence.Coding method is as shown in figure 5, one-dimensional coding content includes: the version number of coding standard, acquisition
Station location marker, feature point number, characteristic point coding (including template number used in each characteristic point, abscissa, ordinate,
Reserved place and check code), time encoding, paper identify equipment global unique identification number, user setting identification code, user setting
Ciphertext code and check code composition.This feature one-dimensional coding scheme, 16 characteristic points of codified, then maximum number of encoding bits be: 8
+ 2+1+4+1+16 × (6+4+4+1+1)+24+32+16+24+1=370.
2 acquisition position coded meanings after Tu5Zhong version number provide as follows: 00 indicates the lower left corner of paper；01 table
Show the lower right corner；10 indicate the back side of paper lower left corner；11 indicate the back side of paper lower right corner.4 abscissas and 4 in characteristic point coding
What position ordinate indicated be it is normalized after characteristic point piecemeal coordinate, the sign of the highest order indicates coordinate in 4: 1
Negative coordinate is represented, 0 represents positive coordinate.Paper features one-dimensional coding can be transmitted directly to terminal by the interface of equipment, while
Can be encoded in the two-dimensional encoded figure of paper features, be shown or printed on paper by paper identification equipment, with facilitate mobile phone,
Apparatus such as computer directly extracts.
2) carries out image paper on the basis of one-dimensional coding two-dimensional encoded.
Paper features are two-dimensional encoded as shown in fig. 6, two-dimensional encoded content includes encoded block, angle finger URL, acquisition position
The quasi- finger URL of set symbol, central campus, side calibration areas, feature one-dimensional coding area, feature viewing area and characteristic point show symbol, below
It is described in detail for the above content for being included.
Encoded block is to be printed upon minimum code basic unit that is on paper or being shown in equipment, by black rectangle
Block or the white rectangle block of same size composition, black block presentation code " 1 ", the white block presentation code of same size
“0”。
Angle finger URL is made of 5 × 5 encoded block, and shape is the square shape of Intermediate Gray point, special for locating paper sheets
One jiao for levying two-dimensional encoded figure, for example, the other three corner location symbols of the outer symbol in the lower left corner are all angle finger URLs in Fig. 6.
Acquisition position symbol is made of 5 × 5 encoded block, and shape is as shown in the lower left corner Fig. 6, for indicating paper fibre
The acquisition position for tieing up image, if what is indicated in Fig. 6 is the paper features extracted in the paper lower left corner, if in lower right corner acquisition
Image is placed on lower right position after then needing lower left corner symbol or so to overturn 180 degree, and former lower-left Angle Position is then changed to angle and determines
Position symbol.
The quasi- finger URL of central campus is made of 3 × 3 encoded block, and the shape such as shape of the mouth as one speaks, position is in the two-dimensional encoded figure of feature
Feature viewing area center, for the encoded block position correction of the two-dimensional encoded figure of paper features, the center of feature viewing area
The position of form center of position and each paper features point.
Four lines of the just diagonal finger URL centre code block in side calibration areas or acquisition position symbol center encoded block
On position, side calibration areas is constituted by the encoded block that equidistant, black and white is separated by arrangement, is used for the two-dimensional encoded figure of alignment features
In encoded block position.
Closely the left and right sides of side calibration areas or the region of upper and lower parallel position are paper features one in feature one-dimensional coding area
Tie up code area.It is mainly used for showing paper features one-dimensional coding in this regional code.The coding of paper features one-dimensional coding
The number designation of order as shown in Figure 6 carries out in proper order.I.e. since the encoded block position that number is 1, counterclockwise along feature one
The rotation of dimension code area takes two turns, and terminates until numbering the position for being 370, altogether codified 370.And setting according to feature one-dimensional coding
Meter scheme can just take entire coding site.
Feature viewing area is the paper features two other than angle finger URL or acquisition position symbol and feature one-dimensional coding area
The dimension remaining central region of code pattern is characterized viewing area, spy that feature viewing area is used to show several keys, that priority is high
Sign point information, and characteristic point information characteristic point shows symbolic formulation, it is therefore an objective to paper image is being carried out with paper identification equipment
When acquisition and feature identification, the position of fine adjustment for paper is assisted, to obtain quasi- paper features take, significant, another effect
It is exactly to facilitate user with the naked eye directly to judge the feature of paper when user carries out paper verifying, paper identification equipment is shown
The two-dimensional encoded figure of the paper features shown and the two dimensional code figure of printing are compared, and feature having the same are seen whether, to sentence
Whether the paper that breaks is scanned duplication.
Characteristic point shows that symbol is simplifying used in expression and this feature point to template image used in characteristic point
Template Information is corresponding, can express the information such as thickness in fiber pattern direction at this feature point position, fiber, specifically, this
Show that the corresponding relationship between symbol and template number is as shown in table 1 in embodiment.
Table 1
By above-mentioned coding mode, the two-dimensional encoded figure of the paper features of acquisition is as shown in Fig. 7-a and Fig. 7-b, wherein Fig. 7-
A is the feature two dimensional code figure that the acquisition identification of the paper lower left corner is formed；Fig. 7-b is paper made of the paper lower right corner acquires and identifies
Feature two dimensional code figure.
A kind of embodiment of the display device of paper fibre feature of the present invention
Identification device in the present embodiment includes acquisition module, matching module, screening module and coding display module, acquisition
Module is used to acquire the electronic image of the specific region of paper；Matching module is used for the electronics using fibre image template to acquisition
Image carries out template matching, chooses characteristic point corresponding greater than the electronic image of given threshold with fibre image template similarity and makees
For paper fibre image characteristic point；Screening module is for sieving obtained characteristic point according to the characteristic point priority of setting
Choosing；Coding display module is formed corresponding with paper fibre feature for encoding to the characteristic information of the characteristic point after screening
Two-dimensional encoded figure, the feature viewing area of the code pattern is shown using characteristic point corresponding with use the Template Information of characteristic point and is accorded with
Number, characteristic point shows that symbol is used to show the thickness information in fiber pattern direction at characteristic point position, fiber.The tool of each module
Body realization rate is described in detail in the embodiment of recognition methods, and which is not described herein again.Display through the invention
Method and apparatus can obtain identical characterization results, form unique, consistent identity characteristic encoded information, realize
Identification to paper fibre feature.
The present invention can obtain accurate, significant paper features, and paper features are intuitively shown by two dimensional code
Show, user can the convenient feature that paper is directly judged according to obtained two-dimensional encoded figure.
A kind of embodiment of the method for anti-counterfeit based on paper fibre feature of the present invention
Method for anti-counterfeit in the present embodiment is realized on the basis of paper fibre characteristic display method, and paper two will be obtained
Dimension code pattern directly prints on plain paper, not only can detecte the digital watermarking and digital signature being replicated, but also can be used for net
In kind the retaining of network transaction both parties.By obtain it is two-dimensional encoded print on shielded paper, comparison print on paper
The feature viewing area in the two-dimensional encoded figure of paper features on, it is provable if display symbolic construction having the same combines
The paper is without the paper after overscanning and duplicating.
It is illustrated so that method for anti-counterfeit is applied in anti-scan and copy and mixed electronic contract as an example below, wherein using real
Example 1 is applied to anti-scan and copy, and application example 2 is applied to mixed electronic contract.
Application example 1
In recent years, extensive use had been obtained in digital watermark technology and ciphering two-dimension code technology.But both technologies exist
There are still impassable technology short slabs in practical application: cannot resist high resolution scanning reprography and invade copyright
Evil.However, can solve the above problem if using paper false proof method of the invention, here is paper false proof method of the present invention
Application example 1.
A kind of anti-fake dissemination method as shown in Fig. 8: a. firstly, by paper identification equipment in the paper blank lower left corner or
The lower right corner, respectively away from paper is acquired and identified at 10mm, obtains the two-dimensional encoded figure of paper features away from paper edge；B. publisher is close
Literary information forms digital watermarking or ordinary QR code after digital watermark technology or planar bar code technology processing and paper two dimension is compiled
Code figure prints on need on paper to be protected together.Dotted line is meant that in figure: can also be one-dimensional by the paper features of extraction
Encoded information and the mixing of publisher's cipher-text information, form digital watermarking or ordinary QR code print on shielded paper.
Determine that paper is the paper of primary cloth, the paper for being still scanned or duplicating, method is:
(a) the two-dimensional encoded figure of feature that current paper sheet is shown with paper identification equipment, compares the paper printed on paper
Feature viewing area in the two-dimensional encoded figure of feature, if display symbolic construction having the same combines, the provable paper is not
Paper after being scanned and duplicating.
(b) digital watermark information or ordinary QR code information are extracted with mobile phone, other scanning devices, with from paper features two
The paper features one-dimensional coding information decoding publisher's ciphertext obtained on dimension code pattern, therefore, it is determined that paper content is from publication
Side.
Application example 2
In recent years, internet finance, e-commerce, network trading rapid development, however, the authentication in transaction is asked
Topic is not well solved but always.For example, E-seal or electronic signature etc. it is all-electronic or virtualization letter
Breath can not provide safe evidence in kind, this brings unprecedented difficulty to the legal arbitration occurred after transaction.How to put down
Weighing apparatus electronic certificate security reliability problem and material evidence exchange problem the main problem faced.The present invention is by paper features information
The electronic information of mixed contract is exchanged with each other, and it is above-mentioned to take the method for respectively printing material evidence retention to well solve
Problem.Fig. 9 is the application method of mixed electronic contract or invoice, and operating procedure is described as follows:
(1) Party A takes a common paper blank, and the two-dimensional encoded figure of paper features of the paper is obtained with paper identification equipment.
Party A edits contract on computers, is inserted into digital sealing or the electronic signature of Party A, and the two-dimensional encoded figure of paper features is inserted into
The contract edited.
(2) the 1st printing contains Party A's digital sealing or electronic signature and paper features two dimension on the paper blank
The contract of code pattern.
(3) contract printed with scanner scanning (2) step obtains scanning electron version.
(4) scanning electron version contract is passed through transmission of network to Party B by Party A.
(5) Party B by network receive Party A be transmitted through come scanning electron version contract.
(6) Party B takes a common paper blank, and the two-dimensional encoded figure of paper features of the paper is obtained with paper identification equipment.
(7) the two-dimensional encoded figure of the feature of the paper is inserted into the electronic edition contract that Party A is transmitted by Party B, and by Party B
The digital sealing or electronic signature of oneself compile new electronic edition contract together.
(8) Party B prints newly synthesized electronic edition contract on the paper blank that (6) step obtains and retains as material evidence.
(9) newly synthesized electronic edition contract is passed through transmission of network to Party A by Party B.
(10) Party A receives the new synthesis electronic edition contract that Party B is transmitted by network.
(11) Party A will newly synthesize the print on paper (the 2nd printing) and conduct that electronic edition contract is printed in (2) step
Material evidence is retained.
(11) are arrived by step (1), it can be seen that there is no progress exchanges in kind by both sides, and obtain other side
The condition code information for retaining paper respectively has voucher and scanning electron version evidence in kind.Moreover, because using scanning contract
The method of content effectively prevents distorting for treaty content.In this way, electronic certificate safety, authentication integrity problem and
Material evidence is exchangeed problem all while being resolved.
Obviously, above-mentioned application method has following several advantages:
(a) due to the electronic scanned document that the content transmitted by network is after printing, treaty content is difficult to distort.
(b) paper features code ensure that the single validity of contract, so that the contract for duplicating or scanning is invalid.This is very suitable
Close the application of the singles contract such as electronic invoice and check.
(c) since E-seal or digital signature do not separate transmitting with treaty content, it is ensured that its safety.
(d) without retaining any material evidence of contract both sides, tangible evidence is retained by both parties for arbitration side.Pipe can substantially be mitigated
The responsibility and pressure of reason person.It is suitable for the application of electronic invoice.
(e) referee method is simple: arbitration side requires both sides to show transaction voucher in kind, even if side refusal shows voucher,
As long as then determining the side's of showing voucher true and false (determination method is with application example one) in kind, and electronic signature or the electricity of both sides can be extracted
Sub- seal information can be sentenced and show voucher side and win a lawsuit.
The present invention amplifies the specific region of plain paper through optical microphotograph lens, and acquires electronic image by sensor,
Paper fibre feature is extracted by the standard form matching designed in advance, the feature of extraction is encoded by certain way, forms paper
Feature one-dimension code and two-dimensional encoded figure.The two-dimensional encoded figure of this feature is directly printed on plain paper, thing is worked as by transaction
Fang Zuowei material object material evidence is retained.Since this code pattern has storing paper identification information, display paper trunk fibre structure special
Sign, unlabeled fibronectin image capture position, storing paper identify the abilities such as device id and user's ciphertext, therefore can solve to hand over
The integrity problem of easy party concerned's authentication.Present invention is mainly applied to the water of the anti-copying and scanning attack in internet finance
The security fields such as print technology, mixed electronic invoice, electronic contract and bank paying.
Claims (10)
1. a kind of display methods of paper fibre feature, which is characterized in that the steps included are as follows for the display methods:
1) electronic image of the specific region of paper is acquired；
2) the fibre image template for constructing multiple local features, using construction fibre image template to the electronic image of acquisition into
Characteristic point corresponding greater than the electronic image of given threshold with local feature fibre image template similarity is chosen in the point-by-point matching of row
As paper fibre image characteristic point；One standard fibers image template of every use, which carries out matching scanning, can all generate a feature
Point bianry image, wherein characteristic point will form several internal connections connected domain isolated from one another in bianry image；Wherein, described
Multiple local feature fibre image templates indicate a variety of different fiber imaging widths and a variety of different fiber extension directions；
3) obtained characteristic point is screened according to the priority of setting；
4) characteristic information of the characteristic point after screening is encoded, forms two-dimensional encoded figure corresponding with paper fibre feature,
The feature viewing area of the code pattern shows symbol, the feature using characteristic point corresponding with the used Template Information of characteristic point
Point display symbol is used to show the thickness information in fiber pattern direction at characteristic point position, fiber.
2. the display methods of paper fibre feature according to claim 1, which is characterized in that the two-dimensional encoded figure is also extremely
It less include one in angle finger URL, acquisition position symbol, the quasi- finger URL of central campus, side calibration areas and feature one-dimensional coding area,
The angle finger URL is used for one jiao of the two-dimensional encoded figure of locating paper sheets feature；The acquisition position symbol is for indicating paper
The acquisition position of fibre image；The quasi- finger URL of the central campus is used for the encoded block position school of the two-dimensional encoded figure of paper features
It is quasi-；The side calibration areas is used to correct the encoded block position in the two-dimensional encoded figure of paper features；The one-dimensional volume of the feature
Code area is for showing feature one-dimensional coding.
3. the display methods of paper fibre feature according to claim 2, which is characterized in that the feature one-dimensional coding
It is encoded for the characteristic information to the characteristic point screened, the encoded information of each characteristic point, which includes at least characteristic point, to be made
Template number, abscissa and ordinate.
4. the display methods of paper fibre feature according to claim 1, which is characterized in that this method further includes to feature
Information carries out coarse and standardization processing on scale: electronic image collected being carried out piecemeal, and is formed from top to bottom
The new scale coordinate system of the serial number numerical value of piecemeal arrangement from left to right；It will be connected in the characteristic point bianry image obtained in step 2)
The center in domain falls into image block area coordinate as new characteristic point position coordinate, obtained standardization characteristic point coordinate (Xτ,
Yτ) are as follows:
Xτ=aτ-x0,Yτ=bτ-y0, τ=1 ... E
Wherein (x0,y0) be all blocking characteristic points centroid；(aτ,bτ) be the τ piecemeal piecemeal coordinate, E be sequence screen
Remaining connected domain number afterwards.
5. the display methods of paper fibre feature according to claim 1, which is characterized in that the priority in step 3) is adopted
With following rule:
A. the priority of the big characteristic point of template width is greater than the small characteristic point priority of template width；
B. the big priority of connected domain area locating for characteristic point is greater than the small characteristic point priority of connected domain area；
If c. connected domain area is identical, priority from top to bottom is determined according to the precedence of appearance from left to right.
6. a kind of display device of paper fibre feature, which is characterized in that the display device include acquisition module, matching module,
Screening module and coding display module,
The acquisition module is used to acquire the electronic image of the specific region of paper；
The matching module is used to construct the fibre image template of multiple local features, utilizes the fibre image template pair of construction
The electronic image of acquisition is matched point by point, chooses the electronics for being greater than given threshold with local feature fibre image template similarity
The corresponding characteristic point of image is as paper fibre image characteristic point；It is every to carry out matching scanning using a standard fibers image template
A characteristic point bianry image will be generated, wherein it is isolated from one another to will form several internal connections in bianry image for characteristic point
Connected domain；Wherein, multiple local feature fibre image templates indicate a variety of different fiber imaging widths and it is a variety of not
Same fiber extension direction；
The screening module is for screening obtained characteristic point according to the characteristic point priority of setting；
The coding display module is formed special with paper fibre for encoding to the characteristic information of the characteristic point after screening
Corresponding two-dimensional encoded figure is levied, the feature viewing area of the code pattern uses characteristic point corresponding with the used Template Information of characteristic point
Show symbol, the characteristic point shows that symbol is used to show the thickness letter in fiber pattern direction at characteristic point position, fiber
Breath.
7. a kind of method for anti-counterfeit based on paper fibre feature, which is characterized in that the step of method for anti-counterfeit is as follows:
1) electronic image of the specific region of paper is acquired；
2) the fibre image template for constructing multiple local features, using construction multiple local features fibre image template to adopting
The electronic image of collection is matched point by point, chooses the electronic chart for being greater than given threshold with local feature fibre image template similarity
As being used as paper fibre image characteristic point；One standard fibers image template of every use, which carries out matching scanning, can all generate a spy
Sign point bianry image, wherein characteristic point will form several internal connections connected domain isolated from one another in bianry image；Wherein, institute
The multiple local feature fibre image templates stated indicate a variety of different fiber imaging widths and a variety of different fiber extension sides
To；
3) obtained characteristic point is screened according to the priority of characteristic point；
4) characteristic point after screening is encoded, forms two-dimensional encoded figure corresponding with paper fibre feature, the code pattern
Feature viewing area shows symbol using characteristic point corresponding with the used Template Information of characteristic point, and the characteristic point shows symbol
For showing the thickness information in fiber pattern direction at characteristic point position, fiber；
5) by obtain it is two-dimensional encoded print on shielded paper, compare and print on paper features two dimension on paper and compile
Feature viewing area in code figure proves that the paper is without over-scanning and answering if display symbolic construction having the same combines
Paper after print.
8. the method for anti-counterfeit according to claim 7 based on paper fibre feature, which is characterized in that the two-dimensional encoded figure
Also include at least one in angle finger URL, acquisition position symbol, the quasi- finger URL of central campus, side calibration areas and feature one-dimensional coding area
, the angle finger URL is used for one jiao of the two-dimensional encoded figure of locating paper sheets feature；The acquisition position symbol is for indicating
The acquisition position of paper fibre image；The quasi- finger URL of the central campus is used for the encoded block position of the two-dimensional encoded figure of paper features
Set calibration；The side calibration areas is used to correct the encoded block position in the two-dimensional encoded figure of paper features；The feature one
Dimension code area is for showing feature one-dimensional coding.
9. the method for anti-counterfeit according to claim 7 based on paper fibre feature, which is characterized in that this method further includes pair
Characteristic information carries out coarse and standardization processing on scale: electronic image collected being carried out piecemeal, and is formed from upper
The new scale coordinate system of the serial number numerical value of piecemeal arrangement from left to right under；It will be in the characteristic point bianry image that obtained in step 2)
The center of connected domain falls into image block area coordinate as new characteristic point position coordinate, obtained standardization characteristic point coordinate
(Xτ, Yτ) are as follows:
Xτ=aτ-x0,Yτ=bτ-y0, τ=1 ... E
Wherein (x0,y0) be all blocking characteristic points centroid；(aτ,bτ) be the τ piecemeal piecemeal coordinate, E be sequence screen
Remaining connected domain number afterwards.
10. the method for anti-counterfeit according to claim 7 based on paper fibre feature, which is characterized in that in the step 3)
Priority follow following criterion:
A. the priority of the big characteristic point of template width is greater than the small characteristic point priority of template width；
B. the big priority of connected domain area locating for characteristic point is greater than the small characteristic point priority of connected domain area；
If c. connected domain area is identical, priority from top to bottom is determined according to the precedence of appearance from left to right.
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| CN110136317B (en) * | 2018-02-05 | 2023-03-31 | 任朝荣 | Method and device for generating authentication information of paper voucher and method, device and system for authenticating authenticity |
| CN108647549B (en) * | 2018-03-14 | 2022-10-21 | 福州迈新生物技术开发有限公司 | Bar code image processing method, device and system |
| CN115330584B (en) * | 2022-10-17 | 2023-01-31 | 北京点聚信息技术有限公司 | Anti-copying encryption method for electronic seal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932852A (en) * | 2005-09-14 | 2007-03-21 | 上海新跃仪表厂 | Tax control machine material characteristic encrypted antifaking method |
| CN102073865A (en) * | 2010-12-24 | 2011-05-25 | 兆日科技（深圳）有限公司 | Anti-counterfeiting method and system using autologous fiber textures of paper |
| CN103020609A (en) * | 2012-12-30 | 2013-04-03 | 上海师范大学 | Complex fiber image recognition method |
| CN104536999A (en) * | 2014-09-15 | 2015-04-22 | 湖南千码防伪科技有限公司 | Random fiber code anti-counterfeiting database construction method based on image processing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004265036A (en) * | 2003-02-28 | 2004-09-24 | Nippon Conlux Co Ltd | Paper sheet identification device and method |
-
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- 2016-12-30 CN CN201611259050.7A patent/CN106650874B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932852A (en) * | 2005-09-14 | 2007-03-21 | 上海新跃仪表厂 | Tax control machine material characteristic encrypted antifaking method |
| CN102073865A (en) * | 2010-12-24 | 2011-05-25 | 兆日科技（深圳）有限公司 | Anti-counterfeiting method and system using autologous fiber textures of paper |
| CN103020609A (en) * | 2012-12-30 | 2013-04-03 | 上海师范大学 | Complex fiber image recognition method |
| CN104536999A (en) * | 2014-09-15 | 2015-04-22 | 湖南千码防伪科技有限公司 | Random fiber code anti-counterfeiting database construction method based on image processing |
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