CN104574642B - Method and device for detecting color-variable printing ink of renminbi on basis of Lab color spaces - Google Patents
Method and device for detecting color-variable printing ink of renminbi on basis of Lab color spaces Download PDFInfo
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- CN104574642B CN104574642B CN201510054056.XA CN201510054056A CN104574642B CN 104574642 B CN104574642 B CN 104574642B CN 201510054056 A CN201510054056 A CN 201510054056A CN 104574642 B CN104574642 B CN 104574642B
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- 108010001267 Protein Subunits Proteins 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000002845 discoloration Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 description 7
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Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—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 using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
Abstract
An embodiment of the invention discloses a method for detecting color-variable printing ink of renminbi on the basis of Lab color spaces. The technical scheme includes that the method comprises acquiring RGB (red, green and blue) images of the to-be-detected renminbi; identifying face-value-oriented information of the to-be-detected renminbi according to the RGB images; positioning color-variable printing ink characters according to the face-value-oriented information; computing gray values Gray R, Gray G and Gray B of each color-variable printing ink character in a red (R) band, a green (G) band and a blue (B) band; converting the gray values Gray R, Gray G and Gray B of each color-variable printing ink character into gray values Gray a and Gray b in the Lab color spaces; judging whether Lab color characteristic values of the to-be-detected renminbi meet corresponding preset conditions or not one by one, determining that the to-be-detected renminbi is counterfeit money if at least one of the Lab color characteristic values of the to-be-detected renminbi does not meet the preset conditions. The corresponding Lab color characteristic values include the gray values Gray a and Gray b of each color-variable printing ink character and the area of the character.
Description
Technical field
The present embodiments relate to RMB color changed ink detection field, and in particular to a kind of based on Lab color spaces
RMB color changed ink detection method and a kind of RMB color changed ink detection means based on Lab color spaces.
Background technology
At present most domestic bank requires to be recognized accurately color shifting ink area and the type such as is defiled, rubbed or spliced
RMB, and as counterfeit money process.But due on market the impaired counterfeit money in color shifting ink region characteristically have diversity,
The papery of uncertainty, such as banknote is produced decolourizes, changes colour, deforming；Or banknote nominal value has stamp-pad ink spot, ink spot；Or paper money
Ticket nominal value is scribbled writing etc., and its detection is also always the difficult point of banknote identification equipment.
Traditional RMB testing equipment is directed to color shifting ink region detection, mainly by gathering RMB picture signal,
Such as tri- passage gray level images of single channel gray level image or multispectral image R, G, B, each color shifting ink character is counted only
Whether the gray value differences opposite sex or character area between gray average distribution, the adjacent character in vertical channel image, judge it one
In fixed threshold range, if beyond certain threshold range color shifting ink counterfeit money is judged to.
In prior art, in the case of somewhat being defiled or worn and torn for color shifting ink character, color shifting ink character exists
Change on gray value near threshold limit value substantially or in setting, to the description of color shifting ink character feature only by from
The gray value of tri- passages of single channel image or multispectral image R, G, B is judged, it is difficult to correct identification color shifting ink character
The true and false of the banknote somewhat defiled or worn and torn, reduces the Detection results of color shifting ink damaged banknotes.
The content of the invention
The embodiment of the present invention provides a kind of RMB color changed ink detection method and device based on Lab color spaces, uses
Quantificational description is carried out in the color attribute of the color shifting ink character to somewhat being defiled or being worn and torn, the impaired paper money of color shifting ink is improved
The Detection results of ticket.
A kind of technical scheme bag of the RMB color changed ink detection method based on Lab color spaces of the embodiment of the present invention
Include：
Obtain the RGB image of RMB to be detected；
The face amount Information of the RMB to be detected is recognized according to the RGB image；
Color shifting ink character is oriented according to the face amount Information；
Calculate each color shifting ink character red (R), green (G), blue (B) three wave bands gray value Gray R, Gray
G、Gray B；
The gray scale Gray R of each color shifting ink character, Gray G, Gray B being converted under Lab color spaces
Value Gray a, Gray b；
By the Lab color characters value of the RMB to be detected with it is corresponding it is pre-conditioned differentiated one by one, judgement is
It is no be satisfied by it is described pre-conditioned, if it is not, then the RMB to be detected be counterfeit money, the Lab color characters value include each
The Gray a of color shifting ink character, Gray b, character area.
Preferably,
By the Lab color characters value of the RMB to be detected with it is corresponding it is pre-conditioned differentiated one by one including：
Single color shifting ink character differentiates, adjacent color shifting ink character differentiates, single color shifting ink character area differentiates.
Preferably,
The single color shifting ink character differentiates to be included：
Judge whether the size of the Gray a and Gray b of each color shifting ink character, Gray a meet corresponding pre-
If condition, if it is not, being then counterfeit money.
Preferably,
The adjacent color shifting ink character differentiates to be included：
Judge size, a change of the Gray a of a color shifting ink character and Gray a of another color shifting ink character
Whether the Gray b of color ink character meet corresponding pre-conditioned with the size of another color shifting ink character Gray b, if
It is no, then it is counterfeit money.
Preferably,
The single color shifting ink character area differentiates to be included：
Whether the character area for judging each color shifting ink character meets corresponding pre-conditioned, if it is not, being then counterfeit money.
The embodiment of the present invention also provides a kind of RMB color changed ink detection means based on Lab color spaces, technical side
Case includes：
Acquisition module, for obtaining the RGB image of RMB to be detected；
Identification module, for the face amount Information in the RGB image for recognizing the acquisition module acquisition；
Locating module, the face amount Information for being identified according to identification module orients color shifting ink character；
Computing module, for calculate each color shifting ink character red (R), green (G), blue (B) three wave bands gray scale
Value Gray R, Gray G, Gray B；
Conversion module, for Gray R, Gray G, Gray B are converted under Lab color spaces gray value Gray a,
Gray b；
Judge module, the Lab color characters value of the RMB to be detected pre-conditioned is sentenced one by one with corresponding
, do not judge whether to be satisfied by it is described pre-conditioned, the Lab color characters value include each color shifting ink character Gray a,
Gray b, character area；
Performing module, if at least one be unsatisfactory for it is described pre-conditioned, the RMB to be detected be counterfeit money.
Preferably,
The judge module includes single color shifting ink character judgement unit, adjacent color shifting ink character judgement unit, list
Individual color shifting ink character area judgement unit.
Preferably,
The single color shifting ink character judgement unit includes：
First judgment sub-unit, judges size, the Gray a of the Gray a and Gray b of each color shifting ink character
Whether meet corresponding pre-conditioned；
First performs subelement, if it is not, being then counterfeit money.
Preferably,
The adjacent color shifting ink character judgement unit includes：
Second judgment sub-unit, judges the Gray a of a color shifting ink character and Gray of another color shifting ink character
Whether the size of a, the Gray b of a color shifting ink character meet corresponding with the size of another color shifting ink character Grayb
It is pre-conditioned；
Second performs subelement, if it is not, being then counterfeit money.
Preferably,
The single color shifting ink character area judgement unit includes：
Whether the 3rd judgment sub-unit, the character area for judging each color shifting ink character meets corresponding pre-conditioned；
3rd performs subelement, if it is not, being then counterfeit money.
The beneficial effect of the embodiment of the present invention is：
The RGB image of the RMB to be detected by obtaining, identifies the face amount Information of RMB to be detected, according to
Face amount Information orients color shifting ink character, calculates gray scale of each color shifting ink character in three wave bands of red, green, blue
Value Gray R, Gray G, Gray B, is then converted into the Gray R for calculating, Gray G, Gray B under Lab color spaces
Gray value Gray a, Gray b, because Lab color spaces include luminance component L, a components from green to red and from indigo plant to Huang
B components, so Gray a, Gray b have carried out quantificational description to the color attribute of color shifting ink character, then by Gray a,
Gray b with it is corresponding it is pre-conditioned differentiated one by one, judge whether to be satisfied by it is corresponding pre-conditioned, due to genuine note and vacation
The color attribute difference of the color shifting ink of coin is big, by the color attribute for contrasting color shifting ink, for color shifting ink is somewhat defiled
Or in the case of friction, still with stronger Detection results, improve receptance of the equipment to normal genuine notes.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is an a kind of reality of the RMB color changed ink detection method based on Lab color spaces of the embodiment of the present invention
Apply a schematic flow sheet；
Fig. 2 is that a kind of structure of the RMB color changed ink detection means based on Lab color spaces of the embodiment of the present invention is shown
It is intended to.
Specific embodiment
The embodiment of the present invention provides a kind of RMB color changed ink detection method and device based on Lab color spaces, uses
Quantificational description is carried out in the color attribute of the color shifting ink character to somewhat being defiled or being worn and torn, the impaired paper money of color shifting ink is improved
The Detection results of ticket.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer to Fig. 1, the one of a kind of RMB color changed ink detection method based on Lab color spaces of the embodiment of the present invention
Individual embodiment includes：
101st, the RGB image of RMB to be detected is obtained；
In the present embodiment, image of the RMB to be detected under rgb light spectrum can be gathered by multispectral identifying device,
RGB image can be otherwise obtained, is not specifically limited herein.
102nd, the face amount Information of RMB to be detected is recognized according to RGB image；
In the present embodiment, the face amount of RMB to be detected includes 100,50,20 etc., towards can be divided into four kinds：Just towards
On, facing down, the back side up and back side is downward.The people to be detected are realized by the otherness of different denomination banknotes pattern characteristics
The face amount of coin is towards identification.
103rd, color shifting ink character is oriented according to face amount Information；
In the present embodiment, according to the face amount Information for identifying, the region at color shifting ink character place is oriented.
104th, calculate each color shifting ink character red (R), green (G), the gray value Gray R of blue (B) three wave bands,
Gray G、Gray B；
In the present embodiment, color shifting ink character is split, calculate each color shifting ink character at red (R), green
(G), the gray value Gray R, Gray G, Gray B of blue (B) three wave bands, that is, calculate each color shifting ink character and exist
Gray value Gray R, Gray G, the Gray B of red (R), green (G), blue (B) three passages.
105th, the gray scale being converted into the Gray R of each color shifting ink character, Gray G, Gray B under Lab color spaces
Value Gray a, Gray b；
In the present embodiment, the Gray R of each color shifting ink character, Gray G, Gray B are converted into according to conversion formula
Gray value Gray a under Lab color spaces, Gray b.
106th, by the Lab color characters value of RMB to be detected with it is corresponding it is pre-conditioned differentiated one by one, judgement is
It is no be satisfied by it is pre-conditioned, if it is not, then execution step 107.
In the present embodiment, Lab color characters value includes Gray a, Gray b, the character area of each color shifting ink character；
By the Lab color characters value of RMB to be detected with it is corresponding it is pre-conditioned differentiated one by one, if at least one be unsatisfactory for it is pre-
If condition, then execution step 107.
107th, RMB to be detected is counterfeit money.
In the present embodiment, differentiate whether the Lab color characters value for referring to RMB to be detected meets corresponding default one by one
Condition, if one of them is unsatisfactory for, RMB to be detected is counterfeit money.
In the present embodiment, the RGB image of the RMB to be detected by obtaining identifies the face amount face of RMB to be detected
To information, color shifting ink character is oriented according to face amount Information, calculate each color shifting ink character in red, green, blue three
The gray value Gray R of individual wave band, Gray G, Gray B, are then converted into the Gray R for calculating, Gray G, Gray B
Gray value Gray a under Lab color spaces, Gray b, because Lab color spaces divide including luminance component L, a from green to red
Measure and from indigo plant to yellow b components, so Gray a, Gray b have carried out quantificational description to the color attribute of color shifting ink character,
Then by Gray a, Gray b with it is corresponding it is pre-conditioned differentiated one by one, judge whether to be satisfied by it is corresponding pre-conditioned,
Due to the color attribute difference of genuine note and the color shifting ink of counterfeit money it is big, by the color attribute for contrasting color shifting ink, for discoloration
In the case that ink is somewhat defiled or rubbed, still with stronger Detection results, receptance of the equipment to normal genuine notes is improved.
It should be noted that the Lab color characters value of RMB to be detected pre-conditioned is sentenced one by one with corresponding
Can not include that single color shifting ink character differentiates, adjacent color shifting ink character differentiates, single color shifting ink character area differentiates,
Illustrate separately below：
(1) single color shifting ink character differentiates
Judge whether the size of the Gray a and Gray b of each color shifting ink character, Gray a meet corresponding default bar
Part, if it is not, being then counterfeit money.
(2) adjacent color shifting ink character differentiates
Judge size, a change of the Gray a of a color shifting ink character and Gray a of another color shifting ink character
Whether the Gray b of color ink character meet corresponding pre-conditioned with the size of another color shifting ink character Gray b, if
It is no, then it is counterfeit money.
(3) single color shifting ink character area differentiates
Whether the character area for judging each color shifting ink character meets corresponding pre-conditioned, if it is not, being then counterfeit money.
Differentiated one by one using aforesaid way, while improving the Detection results of color shifting ink damaged banknotes, improve
The flexibility of operation.
Refer to Fig. 2, the one of a kind of RMB color changed ink detection means based on Lab color spaces of the embodiment of the present invention
Individual embodiment includes：
Acquisition module 201, for obtaining the RGB image of RMB to be detected；
Identification module 202, for the face amount Information in the RGB image for recognizing the acquisition of acquisition module 201；
Locating module 203, the face amount Information for being identified according to identification module 202 orients color shifting ink word
Symbol；
Computing module 204, for calculate each color shifting ink character red (R), green (G), blue (B) three wave bands ash
Angle value Gray R, Gray G, Gray B；
Conversion module 205, for the gray value Gray being converted into Gray R, Gray G, Gray B under Lab color spaces
a、Gray b；
Judge module 206, the Lab color characters value of RMB to be detected pre-conditioned is sentenced one by one with corresponding
Not, judge whether to be satisfied by pre-conditioned, Gray a, Gray b, word of the Lab color characters value including each color shifting ink character
Symbol area.
Performing module 207, if at least one be unsatisfactory for it is pre-conditioned, RMB to be detected be counterfeit money.
In the present embodiment, judge module 206 may further include：Single color shifting ink character judgement unit, adjacent change
Color ink character judgement unit, single color shifting ink character area judgement unit.
Single color shifting ink character judgement unit can include：
Whether first judgment sub-unit, judge the size of the Gray a and Gray b of each color shifting ink character, Gray a
Meet corresponding pre-conditioned；
First performs subelement, if it is not, being then counterfeit money.
Adjacent color shifting ink character judgement unit can include：
Second judgment sub-unit, judges the Gray a of a color shifting ink character and Gray of another color shifting ink character
Whether the size of a, the Gray b of a color shifting ink character meet corresponding with the size of another color shifting ink character Gray b
It is pre-conditioned；
Second performs subelement, if it is not, being then counterfeit money.
Single color shifting ink character area judgement unit can include：
Whether the 3rd judgment sub-unit, the character area for judging each color shifting ink character meets corresponding pre-conditioned；
3rd performs subelement, if it is not, being then counterfeit money.
In the present embodiment, first, acquisition module 201 gets the RGB image of RMB to be detected, then identification module
202 identify face amount Information, and locating module 203 realizes the positioning of color shifting ink character and segmentation, computing module 204 and turn
Change the Lab color character values that module 205 counts each color shifting ink character, realize quantization and the characteristic statisticses of colouring information,
Color value after the 206 pairs of quantizations of last judge module carries out items and differentiates that performing module 207 realizes the inspection to color shifting ink one by one
Survey, improve the Detection results of color shifting ink damaged banknotes；
Secondly, judge module 206 can one by one be differentiated using various ways, improve the flexibility of operation.
It is described in detail by taking the color shifting ink of 100 yuan of face amount RMB as an example below.
Lab color spaces are a kind of color spaces for being comparatively close to human vision, and wherein L (Luminos i ty) is represented
Brightness, a and b represent the opposition dimension of two kinds of colors.The wherein codomain of L represented from black to pure white by 0 to 100, and a is represented from red
The scope of color to green, the value of a is that+127 to -128, b represents scope from blueness to yellow, the value of b be+127 to -
128, just it is being warm colour, is bearing as cool colour.Lab colour gamuts are broad very wide, and it not only contains all colour gamuts of RGB, CMYK, moreover it is possible to show
The color that they can not be showed.The color that human eye can be perceived, can be transferred through Lab models and shows.In addition, Lab colors
Model also can overcome the disadvantages that the uneven deficiency of rgb color model COLOR COMPOSITION THROUGH DISTRIBUTION, because RGB models are in the blue intermediate color between green
It is color excessive, and in green to lacking yellow and other colors between redness.
According to the color that human eye is perceived, 100 yuans of color shifting ink characters are green from front observation color, according to
Lab color space models, in the negative direction of a axles, a more levels off to negative direction and represents that color is greener the principal component of green, and |
a|>|b|。
Concrete steps include：
(1) multispectral image is obtained.Figure of 100 yuan of denomination banknotes under rgb light spectrum is obtained using multispectral identifying device
Picture.
(2) corresponding face amount Information is recognized according to the RGB image of 100 yuan of denominations；
(3) the face amount Information according to 100 yuan orients color shifting ink character region, and to single color shifting ink
Character is split；
(4) calculate each color shifting ink character red (R), green (G), the gray value Gray R of blue (B) three wave bands,
Gray G、Gray B；
(5) gray scale being converted into the Gray R of each color shifting ink character, Gray G, Gray B under Lab color spaces
Value Gray a, Gray b；
Conversion formula is：
Gray L=0.2126*Gray R+0.7152*Gray G+0.0722*Gray B
Gray a=1.4749* (0.2213*Gray R-0.3390*Gray G+0.1177*Gray B)+128；
Gray b=0.6245* (0.1949*Gray R+0.6057*Gray G-0.8006*Gray B)+128；
* the meaning is product.
(6) Lab color character values are counted；
" 100 " three character Lab distribution of mean value are counted first, and " 1 " (Gray L1, Gray a1, Gray is designated as respectively
b1)、“0”(Gray L0,Gray a0,Gray b0)、“0”(Gray L00,Gray a00,Gray b00)；Secondly statistics meets
The character area of normal color shifting ink Lab COLOR COMPOSITION THROUGH DISTRIBUTIONs, distribution is designated as " 1 " (Lab Area1), " 0 " (Lab Area0), " 0 "
(Lab Area00)。
As a example by normal 100 yuans, three color shifting ink character colors are counted, respectively：
" 1 " (Gray L1=100, Gray a1=-9, Gray b1=8),
" 0 " (Gray L0=100, Gray a0=-9, Gray b0=8),
" 0 " (Gray L00=100, Gray a00=-9, Gray b00=8)；
The area distributions for meeting three characters of Lab color characteristics are " 1 " (Lab Area1=44), " 0 " (Lab Area0
=80), " 0 " (Lab Area00=80).
After one of color shifting ink character " 1 " is defiled, the Lab colors of three characters are changed into：
" 1 " (Gray L1=98, Gray a1=-1, Gray b1=8),
" 0 " (Gray L0=100, Gray a0=-9, Gray b0=8),
" 0 " (Gray L00=100, Gray a00=-9, Gray b00=8)；
The area distributions for meeting three characters of Lab color characteristics are " 1 " (Lab Area1=10), " 0 " (Lab Area0
=80), " 0 " (Lab Area00=80).
It can be seen that there is big fluctuation in Gray a1, two characteristic values of Lab Area1, and with respect to Gray L1, Gray
Tri- value fluctuations of L0, Gray L00 are relatively small, therefore do not make a decision.
(7) the Lab color characters value of RMB to be detected pre-conditioned is differentiated one by one with corresponding.
According to the comparison of the color shifting ink Lab color characters value and normal banknote counted to each banknote, realize to becoming
The differentiation in color ink area.
Criterion 1, single color shifting ink character Lab color characters value differentiates.Three color shifting ink characters are carried out respectively
Following logic discrimination, it is genuine note to meet all conditions, is otherwise counterfeit money：
|Gray a1|>|Gray b1|
|Gray a1-(-9)|<3
|Gray a0|>|Gray b0|
|Gray a0-(-9)|<3
|Gray a00|>|Gray b00|
|Gray a00-(-9)|<3
Criterion 2, adjacent color shifting ink character Lab color characters value differentiate.According to normal color shifting ink adjacent character
Between Lab color-values fluctuate less feature, if it may be the impaired character of color shifting ink that fluctuation is larger, following patrolling is carried out respectively
Collect and differentiate, it is genuine note to meet all conditions, is otherwise counterfeit money：
|Gray a1-Gray a0|<3
|Gray b1-Gray b0|<3
|Gray a1-Gray a00|<3
|Gray b1-Gray b00|<3
|Gray a0-Gray a00|<3
|Gray b0-Gray b00|<3
Criterion 3, single color shifting ink character area differentiate.Respectively criterion 1 is met to each character statistics
Number Lab Area1, Lab Area0, Lab Area00 of pixel, and following logic discrimination is carried out, meeting all conditions is
Genuine note, is otherwise counterfeit money：
|Lab Area1-44|<10
|Lab Area0-80|<10
|Lab Area00-80|<10
It is normal banknote to meet judgment condition 1, judgment condition 2, the banknote of judgment condition 3 simultaneously, is otherwise color shifting ink
Impaired counterfeit money.
The above, above example only to illustrate technical scheme, rather than a limitation；Although with reference to front
State embodiment to be described in detail the present invention, it will be understood by those within the art that：It still can be to front
State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these
Modification is replaced, and does not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (8)
1. a kind of RMB color changed ink detection method based on Lab color spaces, it is characterised in that include：
Obtain the RGB image of RMB to be detected；
The face amount Information of the RMB to be detected is recognized according to the RGB image；
Color shifting ink character is oriented according to the face amount Information；
Calculate each color shifting ink character red (R), green (G), the gray value Gray R of blue (B) three wave bands, Gray G,
Gray B；
The gray value Gray R of each color shifting ink character, Gray G, Gray B being converted under Lab color spaces
Gray a、Gray b；
The Lab color characters value of the RMB to be detected pre-conditioned carried out single color shifting ink character and sentenced with corresponding
, adjacent color shifting ink character does not differentiate and single color shifting ink character area differentiates, judge whether to be satisfied by it is described pre-conditioned,
If it is not, then the RMB to be detected is counterfeit money, the Gray a of the Lab color characters value including each color shifting ink character,
Gray b, character area.
2. a kind of RMB color changed ink detection method based on Lab color spaces according to claim 1, its feature exists
In the single color shifting ink character differentiates to be included：
Whether the magnitude relationship for judging the Gray a and Gray b of each color shifting ink character meets pre-conditioned, while sentencing
Whether disconnected Gray a meet corresponding pre-conditioned, if it is not, being then counterfeit money.
3. a kind of RMB color changed ink detection method based on Lab color spaces according to claim 2, its feature exists
In the adjacent color shifting ink character differentiates to be included：
Judge size, a discoloration oil of the Gray a of a color shifting ink character and Gray a of another color shifting ink character
Whether the Gray b of black character meet corresponding pre-conditioned with the size of another color shifting ink character Gray b, if it is not, then
For counterfeit money.
4. a kind of RMB color changed ink detection method based on Lab color spaces according to claim 3, its feature exists
In the single color shifting ink character area differentiates to be included：
Whether the character area for judging each color shifting ink character meets corresponding pre-conditioned, if it is not, being then counterfeit money.
5. a kind of RMB color changed ink detection means based on Lab color spaces, it is characterised in that include：
Acquisition module, for obtaining the RGB image of RMB to be detected；
Identification module, for the face amount Information in the RGB image for recognizing the acquisition module acquisition；
Locating module, the face amount Information for being identified according to identification module orients color shifting ink character；
Computing module, for calculate each color shifting ink character red (R), green (G), blue (B) three wave bands gray value
Gray R、Gray G、Gray B；
Conversion module, for gray value Gray a, Gray for being converted into Gray R, Gray G, Gray B under Lab color spaces
b；
Judge module, by the Lab color characters value of the RMB to be detected with it is corresponding it is pre-conditioned carry out it is single discoloration oil
Black character differentiates, adjacent color shifting ink character differentiates and single color shifting ink character area differentiates, judges whether to be satisfied by described
Pre-conditioned, the Lab color characters value includes Gray a, Gray b, the character area of each color shifting ink character；
Performing module, if at least one be unsatisfactory for it is described pre-conditioned, the RMB to be detected be counterfeit money.
6. a kind of RMB color changed ink detection means based on Lab color spaces according to claim 5, its feature exists
In the single color shifting ink character judgement unit includes：
Whether the first judgment sub-unit, the magnitude relationship for judging the Gray a and Gray b of each color shifting ink character meets
It is pre-conditioned, while it is corresponding pre-conditioned to judge whether Gray a meet；
First performs subelement, if it is not, being then counterfeit money.
7. a kind of RMB color changed ink detection means based on Lab color spaces according to claim 6, its feature exists
In the adjacent color shifting ink character judgement unit includes：
Second judgment sub-unit, judges the Gray a's of a color shifting ink character and Gray a of another color shifting ink character
Whether size, the Gray b of a color shifting ink character meet corresponding pre- with the size of another color shifting ink character Grayb
If condition；
Second performs subelement, if it is not, being then counterfeit money.
8. a kind of RMB color changed ink detection means based on Lab color spaces according to claim 7, its feature exists
In the single color shifting ink character area judgement unit includes：
Whether the 3rd judgment sub-unit, the character area for judging each color shifting ink character meets corresponding pre-conditioned；
3rd performs subelement, if it is not, being then counterfeit money.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054056.XA CN104574642B (en) | 2015-01-30 | 2015-01-30 | Method and device for detecting color-variable printing ink of renminbi on basis of Lab color spaces |
| PCT/CN2015/082616 WO2016119394A1 (en) | 2015-01-30 | 2015-06-29 | Lab color space-based method and device for inspection of color-shifting ink of banknote |
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| CN104574642B (en) * | 2015-01-30 | 2017-04-26 | 广州广电运通金融电子股份有限公司 | Method and device for detecting color-variable printing ink of renminbi on basis of Lab color spaces |
| CN104952143A (en) * | 2015-06-18 | 2015-09-30 | 辰通智能设备(深圳)有限公司 | Color change detection method and color change detection system for red waterlines of bill images |
| CN105069899B (en) * | 2015-08-03 | 2017-08-29 | 深圳怡化电脑股份有限公司 | The method and banknote tester of a kind of currency examination |
| CN106952391B (en) * | 2017-02-27 | 2019-06-07 | 深圳怡化电脑股份有限公司 | One kind being stained Paper Currency Identification and device |
| CN110570209A (en) * | 2019-07-30 | 2019-12-13 | 平安科技（深圳）有限公司 | Certificate authenticity verification method and device, computer equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101751713A (en) * | 2008-12-03 | 2010-06-23 | 北京金储自动化技术研究所 | Fake identification system of bank bills based on spectral image analysis |
| CN101908241A (en) * | 2010-08-03 | 2010-12-08 | 广州广电运通金融电子股份有限公司 | Method and system for identifying valued documents |
| CN103155008A (en) * | 2010-10-08 | 2013-06-12 | 德国捷德有限公司 | Method for checking an optical security feature of a valuable document |
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| JP2004265036A (en) * | 2003-02-28 | 2004-09-24 | Nippon Conlux Co Ltd | Paper sheet identification device and method |
| DE10314071B3 (en) * | 2003-03-28 | 2004-09-30 | Koenig & Bauer Ag | Procedure for the qualitative assessment of a material with at least one identifier |
| JP2010277252A (en) * | 2009-05-27 | 2010-12-09 | Toshiba Corp | Paper sheet handling apparatus |
| CN104200561B (en) * | 2014-06-16 | 2017-06-20 | 华中科技大学 | A kind of method that RMB is stained with writing based on textural characteristics identification |
| CN104574642B (en) * | 2015-01-30 | 2017-04-26 | 广州广电运通金融电子股份有限公司 | Method and device for detecting color-variable printing ink of renminbi on basis of Lab color spaces |
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|---|---|---|---|---|
| CN101751713A (en) * | 2008-12-03 | 2010-06-23 | 北京金储自动化技术研究所 | Fake identification system of bank bills based on spectral image analysis |
| CN101908241A (en) * | 2010-08-03 | 2010-12-08 | 广州广电运通金融电子股份有限公司 | Method and system for identifying valued documents |
| CN103155008A (en) * | 2010-10-08 | 2013-06-12 | 德国捷德有限公司 | Method for checking an optical security feature of a valuable document |
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