CN104574642A - 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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- 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 embodiment of the present invention relates to RMB color changed ink detection field, is specifically related to a kind of RMB color changed ink detection method based on Lab color space and a kind of RMB color changed ink pick-up unit based on Lab color space.
Background technology
Current most domestic bank inquires accurately can identify color shifting ink district and be defiled, rubs or the Renminbi of the type such as splicing, and as counterfeit money process.But because on market, the impaired counterfeit money in color shifting ink region characteristically has diversity, uncertainty, the papery of such as banknote produces decolouring, variable color, distortion; Or banknote nominal value has stamp-pad ink spot, ink spot; Or banknote nominal value is scribbled writing etc., its detection is also the difficult point of banknote identification equipment always.
Tradition Renminbi checkout equipment is for color shifting ink region detection, mainly by gathering Renminbi picture signal, as single channel gray level image or multispectral image R, G, B tri-passage gray level images, count the gray value differences opposite sex or character area between the gray average distribution of each color shifting ink character on the image of autonomous channel, adjacent character, judge it whether in certain threshold range, if exceed certain threshold range, be judged to color shifting ink counterfeit money.
In prior art, when color shifting ink character is defiled a little or is worn and torn, color shifting ink character change on gray-scale value and not obvious or be in setting threshold limit value near, the description of color shifting ink character feature is judged by means of only the gray-scale value from single channel image or multispectral image R, G, B tri-passages, be difficult to correctly to identify and the true and false of banknote that color shifting ink character is defiled a little or worn and torn reduce the Detection results of color shifting ink damaged banknotes.
Summary of the invention
The embodiment of the present invention provides a kind of RMB color changed ink detection method based on Lab color space and device, for carrying out quantificational description to the color attribute of the color shifting ink character of being defiled a little or wear and tear, improves the Detection results of color shifting ink damaged banknotes.
The technical scheme of a kind of RMB color changed ink detection method based on Lab color space of the embodiment of the present invention comprises:
Obtain the RGB image of Renminbi to be detected;
The face amount Information of Renminbi to be detected according to described RGB image recognition;
Color shifting ink character is oriented according to described face amount Information;
Calculate each color shifting ink character at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B;
Gray R, the Gray G of described each color shifting ink character, Gray B are converted into gray-scale value Gray a, the Gray b under Lab color space;
The Lab color character value of described Renminbi to be detected pre-conditionedly to be differentiated one by one with corresponding, judge whether all to meet described pre-conditioned, if not, then described Renminbi to be detected is counterfeit money, and described Lab color character value comprises Gray a, Gray b, the character area of each color shifting ink character.
Preferably,
By the Lab color character value of described Renminbi to be detected with corresponding pre-conditioned differentiate one by one comprise:
Single color shifting ink character differentiates, adjacent color shifting ink character differentiates, single color shifting ink character area differentiates.
Preferably,
Described single color shifting ink character differentiation comprises:
Judging that whether the size of Gray a with Gray b of described each color shifting ink character, Gray a meet corresponding pre-conditioned, if not, is then counterfeit money.
Preferably,
Described adjacent color shifting ink character differentiation comprises:
Judging the Gray a of a color shifting ink character and the size of the Gray a of another color shifting ink character, that whether the Gray b of a color shifting ink character and the size of another color shifting ink character Gray b meet is corresponding pre-conditioned, if not, is then counterfeit money.
Preferably,
Described single color shifting ink character area differentiation comprises:
Judge whether the character area of each color shifting ink character meets the pre-conditioned of correspondence, if not, is then counterfeit money.
The embodiment of the present invention also provides a kind of RMB color changed ink pick-up unit based on Lab color space, and technical scheme comprises:
Acquisition module, for obtaining the RGB image of Renminbi to be detected;
Identification module, for identifying the face amount Information in the RGB image that described acquisition module obtains;
Locating module, orients color shifting ink character for the face amount Information identified according to identification module;
Computing module, for calculating each color shifting ink character at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B;
Conversion module, for being converted into gray-scale value Gray a, the Gray b under Lab color space by Gray R, Gray G, Gray B;
Judge module, the Lab color character value of described Renminbi to be detected pre-conditionedly to be differentiated one by one with corresponding, judge whether all to meet described pre-conditioned, described Lab color character value comprises Gray a, Gray b, the character area of each color shifting ink character;
Execution module, if at least one does not meet described pre-conditioned, then described Renminbi to be detected is counterfeit money.
Preferably,
Described judge module comprises single color shifting ink character judgement unit, adjacent color shifting ink character judgement unit, single color shifting ink character area judgement unit.
Preferably,
Described single color shifting ink character judgement unit comprises:
First judgment sub-unit, judges that whether the size of Gray a with Gray b of described each color shifting ink character, Gray a meet corresponding pre-conditioned;
First performs subelement, if not, is then counterfeit money.
Preferably,
Described adjacent color shifting ink character judgement unit comprises:
Second judgment sub-unit, judges the Gray a of a color shifting ink character and the size of the Gray a of another color shifting ink character, that whether the Gray b of a color shifting ink character and the size of another color shifting ink character Grayb meet is corresponding pre-conditioned;
Second performs subelement, if not, is then counterfeit money.
Preferably,
Described single color shifting ink character area judgement unit comprises:
3rd judgment sub-unit, judges whether the character area of each color shifting ink character meets the pre-conditioned of correspondence;
3rd performs subelement, if not, is then counterfeit money.
The beneficial effect of the embodiment of the present invention is:
By the RGB image of the Renminbi to be detected of acquisition, identify the face amount Information of Renminbi to be detected, color shifting ink character is oriented according to face amount Information, calculate each color shifting ink character red, green, the gray-scale value Gray R of blue three wave bands, Gray G, Gray B, then the Gray R will calculated, Gray G, Gray B is converted into the gray-scale value Gray a under Lab color space, Gray b, because Lab color space comprises luminance component L, a component from green to red and the b component from indigo plant to Huang, so Gray a, Gray b has carried out quantificational description to the color attribute of color shifting ink character, then by Gray a, Gray b pre-conditionedly to differentiate one by one with corresponding, judge whether all to meet the pre-conditioned of correspondence, because the color attribute difference of the color shifting ink of genuine note and counterfeit money is large, by contrasting the color attribute of color shifting ink, when color shifting ink is defiled a little or is rubbed, still there is stronger Detection results, raising equipment is to the receptance of normal genuine notes.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is an embodiment schematic flow sheet of a kind of RMB color changed ink detection method based on Lab color space of the embodiment of the present invention;
Fig. 2 is the structural representation of a kind of RMB color changed ink pick-up unit based on Lab color space of the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of RMB color changed ink detection method based on Lab color space and device, for carrying out quantificational description to the color attribute of the color shifting ink character of being defiled a little or wear and tear, improves the Detection results of color shifting ink damaged banknotes.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, an embodiment of a kind of RMB color changed ink detection method based on Lab color space of the embodiment of the present invention comprises:
101, the RGB image of Renminbi to be detected is obtained;
In the present embodiment, the image of Renminbi to be detected under rgb light spectrum can be gathered by multispectral recognition device, also can obtain RGB image by alternate manner, specifically not limit herein.
102, according to the face amount Information of RGB image recognition Renminbi to be detected;
In the present embodiment, the face amount of Renminbi to be detected comprises 100,50,20 etc., and towards being divided into four kinds: face up, face down, the back side is upwards downward with the back side.The face amount of Renminbi to be detected is realized towards identification by the otherness of different denomination banknotes pattern characteristics.
103, color shifting ink character is oriented according to face amount Information;
In the present embodiment, according to the face amount Information identified, orient the region at color shifting ink character place.
104, each color shifting ink character is calculated at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B;
In the present embodiment, color shifting ink character is split, calculate each color shifting ink character at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B, namely calculate gray-scale value GrayR, Gray G, Gray B of each color shifting ink character at red (R), green (G), blue (B) three passages.
105, Gray R, the Gray G of each color shifting ink character, Gray B are converted into gray-scale value Gray a, the Gray b under Lab color space;
In the present embodiment, Gray R, the Gray G of each color shifting ink character, Gray B are converted into gray-scale value Gray a, the Gray b under Lab color space according to conversion formula.
106, the Lab color character value of Renminbi to be detected pre-conditionedly to be differentiated one by one with corresponding, judge whether all to meet pre-conditioned, if not, then perform step 107.
In the present embodiment, Lab color character value comprises Gray a, Gray b, the character area of each color shifting ink character; The Lab color character value of Renminbi to be detected pre-conditionedly to be differentiated one by one with corresponding, if at least one does not meet pre-conditioned, then performs step 107.
107, Renminbi to be detected is counterfeit money.
In the present embodiment, differentiate whether the Lab color character value referring to Renminbi to be detected meets the pre-conditioned of correspondence, if one of them does not meet, then Renminbi to be detected is counterfeit money one by one.
In the present embodiment, by the RGB image of the Renminbi to be detected of acquisition, identify the face amount Information of Renminbi to be detected, color shifting ink character is oriented according to face amount Information, calculate each color shifting ink character red, green, the gray-scale value Gray R of blue three wave bands, Gray G, Gray B, then the Gray R will calculated, Gray G, Gray B is converted into the gray-scale value Gray a under Lab color space, Grayb, because Lab color space comprises luminance component L, a component from green to red and the b component from indigo plant to Huang, so Gray a, Gray b has carried out quantificational description to the color attribute of color shifting ink character, then by Graya, Gray b pre-conditionedly to differentiate one by one with corresponding, judge whether all to meet the pre-conditioned of correspondence, because the color attribute difference of the color shifting ink of genuine note and counterfeit money is large, by contrasting the color attribute of color shifting ink, when color shifting ink is defiled a little or is rubbed, still there is stronger Detection results, raising equipment is to the receptance of normal genuine notes.
It should be noted that, by the Lab color character value of Renminbi to be detected with corresponding pre-conditioned differentiate one by one can comprise that single color shifting ink character differentiates, adjacent color shifting ink character differentiates, single color shifting ink character area differentiates, be described respectively below:
(1) single color shifting ink character differentiates
Judging that whether the size of Gray a with Gray b of each color shifting ink character, Gray a meet corresponding pre-conditioned, if not, is then counterfeit money.
(2) adjacent color shifting ink character differentiates
Judging the Gray a of a color shifting ink character and the size of the Gray a of another color shifting ink character, that whether the Gray b of a color shifting ink character and the size of another color shifting ink character Gray b meet is corresponding pre-conditioned, if not, is then counterfeit money.
(3) single color shifting ink character area differentiates
Judge whether the character area of each color shifting ink character meets the pre-conditioned of correspondence, if not, is then counterfeit money.
Adopt aforesaid way to differentiate one by one, while improving the Detection results of color shifting ink damaged banknotes, improve the dirigibility of operation.
Refer to Fig. 2, an embodiment of a kind of RMB color changed ink pick-up unit based on Lab color space of the embodiment of the present invention comprises:
Acquisition module 201, for obtaining the RGB image of Renminbi to be detected;
Identification module 202, for identifying the face amount Information in the RGB image that acquisition module 201 obtains;
Locating module 203, orients color shifting ink character for the face amount Information identified according to identification module 202;
Computing module 204, for calculating each color shifting ink character at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B;
Conversion module 205, for being converted into gray-scale value Gray a, the Gray b under Lab color space by Gray R, Gray G, Gray B;
Judge module 206, pre-conditionedly to differentiate with corresponding one by one by the Lab color character value of Renminbi to be detected, and judge whether all to meet pre-conditioned, Lab color character value comprises Gray a, Gray b, the character area of each color shifting ink character.
Execution module 207, if at least one does not meet pre-conditioned, then Renminbi to be detected is counterfeit money.
In the present embodiment, judge module 206 may further include: single color shifting ink character judgement unit, adjacent color shifting ink character judgement unit, single color shifting ink character area judgement unit.
Single color shifting ink character judgement unit can comprise:
First judgment sub-unit, judges that whether the size of Gray a with Gray b of each color shifting ink character, Gray a meet corresponding pre-conditioned;
First performs subelement, if not, is then counterfeit money.
Adjacent color shifting ink character judgement unit can comprise:
Second judgment sub-unit, judges the Gray a of a color shifting ink character and the size of the Gray a of another color shifting ink character, that whether the Gray b of a color shifting ink character and the size of another color shifting ink character Grayb meet is corresponding pre-conditioned;
Second performs subelement, if not, is then counterfeit money.
Single color shifting ink character area judgement unit can comprise:
3rd judgment sub-unit, judges whether the character area of each color shifting ink character meets the pre-conditioned of correspondence;
3rd performs subelement, if not, is then counterfeit money.
In the present embodiment, first, acquisition module 201 gets the RGB image of Renminbi to be detected, then identification module 202 identifies face amount Information, locating module 203 realizes location and the segmentation of color shifting ink character, computing module 204 and conversion module 205 count the Lab color character value of each color shifting ink character, realize quantification and the characteristic statistics of colouring information, last judge module 206 carries out everyly differentiating one by one to the color value after quantizing, execution module 207 realizes the detection to color shifting ink, improves the Detection results of color shifting ink damaged banknotes;
Secondly, judge module 206 can adopt various ways to differentiate one by one, improves the dirigibility of operation.
Be described in detail for the color shifting ink of 100 yuan of face amount Renminbi below.
Lab color space is a kind of color space being comparatively close to human vision, and wherein L (Luminos i ty) represents brightness, a and b represents the opposition dimension of two kinds of colors.Wherein the codomain of L is by 0 to 100, represents from black to pure white, and a represents the scope from redness to green, and the value of a is the scope that+127 to-128, b represents from blueness to yellow, and the value of b is+127 to-128, is being just warm colour, is bearing as cool colour.Lab colour gamut is broad very wide, and it not only contains all colour gamuts of RGB, CMYK, can also show the color that they can not show.The color of the naked eyes energy perception of people, can be showed by Lab model.In addition, Lab colour model can also make up the deficiency of rgb color model COLOR COMPOSITION THROUGH DISTRIBUTION inequality, because the transition color of RGB model between blueness to green is too much, and between green to redness, lacks yellow and other colors.
According to the color of Human Perception, 100 yuans of color shifting ink characters are green from front observation color, and according to Lab color space model, green principal component is in the negative direction of a axle, a more levels off to negative direction and represents that color is greener, and | a|>|b|.
Concrete steps comprise:
(1) multispectral image obtains.Multispectral recognition device is utilized to obtain the image of 100 yuan of denomination banknotes under rgb light spectrum.
(2) corresponding according to the RGB image recognition of 100 yuan of denominations face amount Information;
(3) orient color shifting ink character region according to the face amount Information of 100 yuan, and single color shifting ink character is split;
(4) each color shifting ink character is calculated at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B;
(5) Gray R, the Gray G of each color shifting ink character, Gray B are converted into gray-scale value Gray a, the Gray b under Lab color space;
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 value is added up;
First count " 100 " three character Lab distribution of mean value, be designated as " 1 " (Gray L1, Graya1 respectively, Gray 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 DISTRIBUTION, and distribution is designated as " 1 " (Lab Area1), " 0 " (Lab Area0), " 0 " (Lab Area00).
For normal 100 yuans, add up three color shifting ink character colors, be 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)；
Meet the area distributions of three characters of Lab color characteristic for " 1 " (Lab Area1=44), " 0 " (Lab Area0=80), " 0 " (Lab Area00=80).
After one of them color shifting ink character " 1 " is defiled, the Lab color of three characters becomes:
“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)；
Meet the area distributions of three characters of Lab color characteristic for " 1 " (Lab Area1=10), " 0 " (Lab Area0=80), " 0 " (Lab Area00=80).
Can find out Gray a1, large fluctuation occurs Lab Area1 two eigenwerts, and Gray L1, Gray L0, the fluctuation of Gray L00 tri-value are relatively little relatively, therefore do not make a decision.
(7) the Lab color character value of Renminbi to be detected pre-conditionedly to be differentiated one by one with corresponding.
According to the comparison of the color shifting ink Lab color character value counted each banknote and normal banknote, realize the differentiation to color shifting ink district.
Criterion 1, single color shifting ink character Lab color character value differentiates.Three color shifting ink characters carry out following logic discrimination respectively, and meeting all conditions is genuine note, otherwise is 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 character value differentiate.The feature less according to the Lab color-values fluctuation between normal color shifting ink adjacent character, if fluctuating larger may be the impaired character of color shifting ink, carry out following logic discrimination respectively, meeting all conditions is genuine note, otherwise is 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 each character statistics is met to number Lab Area1, Lab Area0, the Lab Area00 of the pixel of criterion 1, and carry out following logic discrimination, meeting all conditions is genuine note, otherwise is counterfeit money:
|Lab Area1-44|<10
|Lab Area0-80|<10
|Lab Area00-80|<10
Meet simultaneously judgment condition 1, judgment condition 2, judgment condition 3 banknote be normal banknote, otherwise be the impaired counterfeit money of color shifting ink.
The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1., based on a RMB color changed ink detection method for Lab color space, it is characterized in that, comprising:
Obtain the RGB image of Renminbi to be detected;
The face amount Information of Renminbi to be detected according to described RGB image recognition;
Color shifting ink character is oriented according to described face amount Information;
Calculate each color shifting ink character at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B;
Gray R, the Gray G of described each color shifting ink character, Gray B are converted into gray-scale value Gray a, the Gray b under Lab color space;
The Lab color character value of described Renminbi to be detected pre-conditionedly to be differentiated one by one with corresponding, judge whether all to meet described pre-conditioned, if not, then described Renminbi to be detected is counterfeit money, and described Lab color character value comprises Gray a, Gray b, the character area of each color shifting ink character.
2. a kind of RMB color changed ink detection method based on Lab color space according to claim 1, is characterized in that, by the Lab color character value of described Renminbi to be detected with corresponding pre-conditioned differentiate one by one comprise:
Single color shifting ink character differentiates, adjacent color shifting ink character differentiates, single color shifting ink character area differentiates.
3. a kind of RMB color changed ink detection method based on Lab color space according to claim 2, is characterized in that, described single color shifting ink character differentiation comprises:
Judging that whether the size of Gray a with Gray b of described each color shifting ink character, Gray a meet corresponding pre-conditioned, if not, is then counterfeit money.
4. a kind of RMB color changed ink detection method based on Lab color space according to claim 2, is characterized in that, described adjacent color shifting ink character differentiation comprises:
Judging the Gray a of a color shifting ink character and the size of the Gray a of another color shifting ink character, that whether the Gray b of a color shifting ink character and the size of another color shifting ink character Gray b meet is corresponding pre-conditioned, if not, is then counterfeit money.
5. a kind of RMB color changed ink detection method based on Lab color space according to claim 2, is characterized in that, described single color shifting ink character area differentiation comprises:
Judge whether the character area of each color shifting ink character meets the pre-conditioned of correspondence, if not, is then counterfeit money.
6., based on a RMB color changed ink pick-up unit for Lab color space, it is characterized in that, comprising:
Acquisition module, for obtaining the RGB image of Renminbi to be detected;
Identification module, for identifying the face amount Information in the RGB image that described acquisition module obtains;
Locating module, orients color shifting ink character for the face amount Information identified according to identification module;
Computing module, for calculating each color shifting ink character at red (R), green (G), gray-scale value Gray R, the Gray G of blue (B) three wave bands, Gray B;
Conversion module, for being converted into gray-scale value Gray a, the Gray b under Lab color space by Gray R, Gray G, Gray B;
Judge module, the Lab color character value of described Renminbi to be detected pre-conditionedly to be differentiated one by one with corresponding, judge whether all to meet described pre-conditioned, described Lab color character value comprises Gray a, Gray b, the character area of each color shifting ink character;
Execution module, if at least one does not meet described pre-conditioned, then described Renminbi to be detected is counterfeit money.
7. a kind of RMB color changed ink pick-up unit based on Lab color space according to claim 6, it is characterized in that, described judge module comprises single color shifting ink character judgement unit, adjacent color shifting ink character judgement unit, single color shifting ink character area judgement unit.
8. a kind of RMB color changed ink pick-up unit based on Lab color space according to claim 7, is characterized in that, described single color shifting ink character judgement unit comprises:
First judgment sub-unit, judges that whether the size of Gray a with Gray b of described each color shifting ink character, Gray a meet corresponding pre-conditioned;
First performs subelement, if not, is then counterfeit money.
9. a kind of RMB color changed ink pick-up unit based on Lab color space according to claim 7, is characterized in that, described adjacent color shifting ink character judgement unit comprises:
Second judgment sub-unit, judges the Gray a of a color shifting ink character and the size of the Gray a of another color shifting ink character, that whether the Gray b of a color shifting ink character and the size of another color shifting ink character Grayb meet is corresponding pre-conditioned;
Second performs subelement, if not, is then counterfeit money.
10. a kind of RMB color changed ink pick-up unit based on Lab color space according to claim 7, is characterized in that, described single color shifting ink character area judgement unit comprises:
3rd judgment sub-unit, judges whether the character area of each color shifting ink character meets the pre-conditioned of correspondence;
3rd performs subelement, if not, is then counterfeit money.
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| 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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| 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 |
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| CN (1) | CN104574642B (en) |
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| 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 |
| CN105069899A (en) * | 2015-08-03 | 2015-11-18 | 深圳怡化电脑股份有限公司 | Currency detection method and currency detection device |
| WO2016119394A1 (en) * | 2015-01-30 | 2016-08-04 | 广州广电运通金融电子股份有限公司 | Lab color space-based method and device for inspection of color-shifting ink of banknote |
| CN106952391A (en) * | 2017-02-27 | 2017-07-14 | 深圳怡化电脑股份有限公司 | One kind is stained Paper Currency Identification and device |
| WO2021017610A1 (en) * | 2019-07-30 | 2021-02-04 | 平安科技（深圳）有限公司 | Certificate authenticity verification method and apparatus, computer device and storage medium |
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| WO2016119394A1 (en) | 2016-08-04 |
| CN104574642B (en) | 2017-04-26 |
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