CN107316376A - A kind of bank note based on color shifting ink, bill discrimination method - Google Patents
A kind of bank note based on color shifting ink, bill discrimination method Download PDFInfo
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- CN107316376A CN107316376A CN201610261375.2A CN201610261375A CN107316376A CN 107316376 A CN107316376 A CN 107316376A CN 201610261375 A CN201610261375 A CN 201610261375A CN 107316376 A CN107316376 A CN 107316376A
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- 238000012850 discrimination method Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000005286 illumination Methods 0.000 claims abstract description 7
- 230000004075 alteration Effects 0.000 claims abstract description 4
- 230000007723 transport mechanism Effects 0.000 claims abstract description 4
- 239000000976 ink Substances 0.000 description 29
- 230000003287 optical effect Effects 0.000 description 17
- 230000007246 mechanism Effects 0.000 description 14
- 238000001514 detection method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012372 quality testing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 239000002932 luster Substances 0.000 description 1
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Classifications
-
- 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
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/20—Testing patterns thereon
Abstract
The invention discloses a kind of bank note based on color shifting ink, bill discrimination method, transport mechanism, two light sources and a camera are provided with, described two light sources are so that with the presumptive area of different angular illuminations to bank note to be measured or bill, this method includes respectively：The presumptive area of bank note to be measured or bill is irradiated to using the first light source, the symbol or figure in presumptive area are obtained by camera；The presumptive area of bank note to be measured or bill is irradiated to using secondary light source, the symbol or figure in presumptive area are obtained by the camera；The color of the symbol obtained twice or figure is compared respectively；If there is aberration, judge that the symbol or figure are printed as using color shifting ink.
Description
Technical field
The invention belongs to field of anti-counterfeit technology, and in particular to a kind of bank note based on color shifting ink, bill discrimination method.
Background technology
There is the high-end anti-counterfeiting technology of " multi-angle optical characteristic " including having been used more and more in the valuable prints including banknote, ticket and trade mark etc., Optical Variable Ink (OVI, Optical Variable Ink, be also known as ' color shifting ink ') and hologram pattern be Typical Representative therein.
Color shifting ink, i.e., add the anti-fake material of property in ink vehicle, and the special printing inks processed through special process reach false proof purpose using the colorant and link stuff of its specific function.When ink is in light heat environment, determined whether it is true or false by the color change for observing ink pull to reflect.The characteristics of this kind of anti-counterfeiting technology be implement simple, low cost, good concealment, it is bright in luster, examine simple, reappearance strong, be the preferred anti-counterfeiting technology of various countries' bank note, ticket and trade mark.
It is reported that, the interference-type photochromatic printing ink used in banknote printing is a kind of most complicated antifalse ink, it has the effect of pearlescent gloss and metal, this characteristic can allow the ink marking to tilt to certain angle under the available light of certain angle, pattern is set to be shifted from a kind of form and aspect to another form and aspect, so that color changes.For example, 100 yuans of version in 2005 have just been used this technology, yellow green is viewed as with nominal value vertical angle, certain angle is tilted and is then changed into bottle green, these dynamic color change effects are also RMB holder most convenient efficiently discrimination means.And ink technology complex process, it is impossible to replicated using equipment such as high definition duplicator and color scanners, forgeability is low, it is reported that the RMB for updating one edition will also continue to use this anti-forgery ink.
Another anti-forgery ink is fluorescent ink.It is the product by multiple compounds and ultra-violet absorber resin-bonded.It can be shown under ultraviolet light, and send orange fluorescence, in contrast, counterfeit money is faint in color under ultraviolet light.
Detection for color shifting ink (OVI) and hologram pattern is detected by obtaining different optical signatures from different perspectives under white light illumination.Traditional detection method, whether human eye translation-angle is observed or multiple video cameras are shot with video-corder differentiated from different perspectives, and its essence is all the change by angle to reach the purpose of multi-angle optical characteristic collection.For the mode of Automatic Measurement Technique, for a characteristic point, to use the video camera of a pair (2) or more, undoubtedly add cost of implementation, if can be detected using single camera, then be all very beneficial for cost-effective and reduction, control complexity.
The content of the invention
In view of this, it is an object of the present invention to provide a kind of bank note based on color shifting ink, bill discrimination method, it is provided with transport mechanism, the first light source, secondary light source and a camera, first light source, secondary light source are so that with the presumptive area of different angular illuminations to bank note to be measured or bill, this method comprises the following steps respectively：
S01, the presumptive area of bank note to be measured or bill is irradiated to using the first light source, and the symbol or figure in presumptive area are obtained by camera；
S02, the presumptive area of bank note to be measured or bill is irradiated to using secondary light source, and the symbol or figure in presumptive area are obtained by the camera；
S03, compares the color of the symbol obtained twice or figure respectively；
If there is aberration, judge that the symbol or figure are printed as using color shifting ink.
Further, the first light source is basically perpendicular to bank note to be measured or bill face irradiation presumptive area, in other words, and light that the first light source is sent and bank note to be measured or bill face are into 90 degree or so angles, such as 80 degree -- and 90 degree.
Secondary light source differs at least 40 degree with the angle of the first light source, in other words, and the light that secondary light source is sent is with bank note to be measured or bill into 20 degree -- and 50 degree.
If symbol or the color of figure that shooting the first two times are obtained respectively judge bank note or bill to be true to be particular color.
The present invention changes the optical environment of detection zone by using two light sources, practically equals to and incident and reflection the direction of light is changed in the case of not translation-angle, so as to reach the purpose that two different angular optical features are observed in same visual field；Further through adjust automatically minute surface and the mode of the working condition of light-source angle position and adjust automatically video camera and paper advance mechanism, emulate human eye to individual banknotes OVI (optically variable ink) or hologram pattern feature identification process (i.e. under backlighting condition, banknote is overturn at a certain angle, OVI patterns can be seen in the change of a pair of colors or the change of hologram pattern or color is seen), then under the control of master control circuit, complete to treat the purpose that " multi-angle optical characteristic " in detectable substance carries out automatic detection identification in the case of thing high-speed motion to be detected；And the video camera number required for single test point, falls below minimum.
The present invention from optics and the electromechanical angle coordinated emphatically by improving existing " multi-angle optical characteristic " automatic detection device, and by Comprehensive Control of the master control circuit to light source and mechanical part, complete whole detection identification process.Device proposed by the present invention is especially applied in the equipment that banknote detects identification and trade mark quality testing in " multi-angle optical characteristic " automatic checkout equipment, can be effectively reduced cost, and further improve the accuracy of identification.
For above-mentioned and related purpose, one or more embodiments include the feature that will be explained in and be particularly pointed out in the claims below.Following explanation and accompanying drawing describe some modes in some illustrative aspects, and the only utilizable various modes of principle of each embodiment of its instruction in detail.Other benefits and novel features are by as following detailed description is considered in conjunction with the accompanying and becomes obvious, and the disclosed embodiments are to include all these aspects and they are equal.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is bank note, the paper discriminating apparatus structural representation of the color shifting ink provided in the embodiment of the present invention；
Fig. 2 is bank note, the bill discrimination method flow chart of the color shifting ink provided in the embodiment of the present invention.
Embodiment
In order to differentiate bank note, bill using color shifting ink or hologram image anti-counterfeiting technology, reference picture 1, the invention provides a kind of detection means for being used to differentiate color shifting ink, including：Main pedestal (10), camera (11), two light sources (12a and 12b), paper delivery mechanisms (13) and manipulation unit (14)；Wherein,
It is internal that the paper delivery mechanism (13) is arranged on the main pedestal (10)；
The camera (11) is fixed on the main pedestal (10) by mechanical part, above paper delivery mechanism (14)；
Light source (12a and 12b) is connected with main pedestal (10) by mechanical part, and the position of light source (12a and 12b) is dynamically adapted；
Manipulation unit (15) is connected with camera (11), light source (12a and 12b) and paper delivery mechanism (14) by the communications cable respectively, for carrying out operational control to the camera (11), light source (12a and 12b) and paper delivery mechanism (13)；
Light source (12a and 12b) is with the bank note to be detected or the relative position of bill face and minute surface (13) on paper delivery mechanism (13) according to region to be measured (i.e. color shifting ink symbol or figure position)；
The height and angle of described camera (11) are determined according to regional extent size to be detected and the relative position of light source (12a and 12b)；
Described camera (11) and the angles and positions of the working condition and light source (12a and 12b) of paper delivery mechanism (13) is controlled by manipulation unit (14).
Wherein, the camera (11) is CMOS camera or CCD camera, can complete static collection or the high speed acquisition of image.
Wherein, the picture of the motion path and the path of measuring point to be checked in minute surface is included in the field range of described camera (11) simultaneously.
Main pedestal (10), the paper money counter that can refer on the market positioned at paper delivery mechanism is made, and removes false distinguishing and control module, and a reservation machinery walks paper money platform.Special customization can be carried out after industrialization.
Minute surface requires reflecting surface flat even, and thickness is suitable so that reflectance lightness is impartial.
A kind of bank note based on color shifting ink, the bill discrimination method of the present embodiment offer, it is provided with transport mechanism, the first light source, secondary light source and a camera, first light source, secondary light source are with respectively with the presumptive area of different angular illuminations to bank note to be measured or bill, referring to Fig. 2, this method comprises the following steps：
S01, the presumptive area of bank note to be measured or bill is irradiated to using the first light source, and the symbol or figure in presumptive area are obtained by camera；
S02, the presumptive area of bank note to be measured or bill is irradiated to using secondary light source, and the symbol or figure in presumptive area are obtained by camera；
S03, compares the color of the symbol obtained twice or figure respectively；If there is aberration, judge that the symbol or figure are printed as using color shifting ink.
Further, the first light source is basically perpendicular to bank note to be measured or bill face irradiation presumptive area, in other words, and light that the first light source is sent and bank note to be measured or bill face are into 90 degree or so angles, such as 80 degree to 90 degree.
Secondary light source differs at least 40 degree with the angle of the first light source, in other words, and the light that secondary light source is sent is with bank note to be measured or bill into 10 degree to 50 degree.
If symbol or the color of figure that shooting the first two times are obtained respectively judge bank note or bill to be true to be particular color.
Due to needing that IMAQ is carried out under high-speed condition, time for exposure needs are short enough, so the intensity of illumination needs of the light source device used are sufficiently large；Specific implementation can coordinate the optics focused on to constitute using LED array.
Camera can use CMOS or CCD camera, it is desirable to be the speed and resolution ratio that disclosure satisfy that system operation.
Manipulation unit can be constituted by making to be preferably embedded formula system on face, and process chip regards specific system operation and cost requirement, may be selected DSP, ARM, manipulation unit PGA chips, and storage and logical process chip are also depending on viewing system requirement.
System handles embodiment：
By manipulating the control of unit, sample to be detected is transferred to suitable position by paper delivery mechanism, and provides feedback signal to manipulating unit.
By manipulating unit operation, control light source (12a and 12b) lights respectively, make bank note to be detected or bill that there is expected collection effect, i.e. in the field range of camera, while form the multi-angle optical characteristic of sample to be detected, and feedback signal is provided to manipulating unit.
By manipulating the control of unit, the image of symbol or figure is gathered by camera, and the memory cell transferred data on manipulation unit is stored, in case further handle, and provide feedback signal to manipulating unit.
Under the control of manipulation unit, camera is gathered to the image of symbol or figure, by series of preprocessing, feature extraction, Threshold Analysis algorithm, synthesis is compared and obtains final result.
Under the control of manipulation unit, signal (sound or indication signal) is sent based on result.
Main pedestal (10), can remove false distinguishing and control module, a reservation machinery walks the realization of paper money platform positioned at paper delivery mechanism (13) by paper money counter preferred on the market.
Light source can be made up of light source device preferred on the market.Due to needing that IMAQ is carried out under high-speed condition, time for exposure needs are short enough, so the intensity of illumination needs of light source device are sufficiently large；Specific implementation can coordinate the optics focused on to constitute using LED array.
Camera can be made up of preferred on the market CMOS or ccd video camera, it is desirable to be the speed and resolution ratio that disclosure satisfy that system operation.
Manipulation unit can be constituted by making to be preferably embedded formula system on face, and process chip regards specific system operation and cost requirement, may be selected DSP, ARM, fpga chip, and storage and logical process chip are also depending on viewing system requirement.
System processing specific work process is as follows：
By manipulating the control of unit, sample to be detected is transferred to suitable position by paper delivery mechanism, and provides feedback signal to manipulating unit.
By manipulating the control of unit, reconciling minute surface and light source makes sample to be detected have expected collection effect, i.e., in the field range of camera, while form the multi-angle optical characteristic of sample to be detected, and provides feedback signal to manipulating unit.
By manipulating the control of unit, by camera collection image data, and the memory cell transferred data on manipulation unit is stored, in case further handling, and provides feedback signal to manipulating unit.
Under the control of manipulation unit, the view data that will be gathered by camera, by the pretreatment of a series of complex, feature extraction, Threshold Analysis algorithm, synthesis obtains final result.
Under the control of manipulation unit, mechanically actuated is carried out by result control paper delivery mechanism or is shown by other display modules.
In summary, the present invention is by using two light sources, the optical environment of detection zone is changed, practically equals to and incident and reflection the direction of light is changed in the case of not translation-angle, so as to reach the purpose that two different angular optical features are observed in same visual field；Further through adjust automatically minute surface and the mode of the working condition of light-source angle position and adjust automatically video camera and paper advance mechanism, emulate human eye to individual banknotes OVI (optically variable ink) or hologram pattern feature identification process (i.e. under backlighting condition, banknote is overturn at a certain angle, OVI patterns can be seen in the change of a pair of colors or the change of hologram pattern or color is seen), then under the control of master control circuit, complete to treat the purpose that " multi-angle optical characteristic " in detectable substance carries out automatic detection identification in the case of thing high-speed motion to be detected；And the video camera number required for single test point, falls below minimum.
The present invention from optics and the electromechanical angle coordinated emphatically by improving existing " multi-angle optical characteristic " automatic detection device, and by Comprehensive Control of the master control circuit to light source and mechanical part, complete whole detection identification process.Device proposed by the present invention is especially applied in the equipment that banknote detects identification and trade mark quality testing in " multi-angle optical characteristic " automatic checkout equipment, can be effectively reduced cost, and further improve the accuracy of identification.
According to the disclosed embodiment, those skilled in the art can be enabled to realize or using the present invention.To those skilled in the art, the various modifications of these embodiments are it will be apparent that and the general principles that define here can also be applied to other embodiment on the basis of the scope and spirit of the present invention are not departed from.Embodiment described above is only presently preferred embodiments of the present invention, is not intended to limit the invention, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., be should be included in the scope of the protection.
It should be understood that the particular order or level the step of during disclosed are the examples of illustrative methods.Based on design preference, it should be appreciated that during the step of particular order or level can be rearranged in the case where not departing from the protection domain of the disclosure.Appended claim to a method gives the key element of various steps with exemplary order, and not to be limited to described particular order or level.
Described above includes the citing of one or more embodiments.Certainly, it is impossible part or all possible combination of method to be described to describe above-described embodiment, but it will be appreciated by one of ordinary skill in the art that each embodiment can do further combinations and permutations.Therefore, embodiment described herein is intended to all such changes, modifications and variations fallen within scope of appended claims.In addition, with regard to the term "comprising" used in specification or claims, the word covers mode similar to term " comprising ", just as " including, " explains as link word in the claims.In addition, the use of any one term "or" in the specification of claims being to represent " non-exclusionism or ".
Claims (4)
1. a kind of bank note based on color shifting ink, bill discrimination method, be provided with transport mechanism, the first light source,
Secondary light source and a camera, first light source, secondary light source with different angular illuminations to be arrived respectively
The presumptive area of bank note or bill to be measured, it is characterised in that this method includes：
The presumptive area of bank note to be measured or bill is irradiated to using the first light source, obtains predetermined by the camera
Symbol or figure in region；
The presumptive area of bank note to be measured or bill is irradiated to using secondary light source, obtains predetermined by the camera
Symbol or figure in region；
The color of the symbol obtained twice or figure is compared respectively；
If there is aberration, judge that the symbol or figure are printed as using color shifting ink.
2. the method as described in claim 1, it is characterised in that further, the light that the first light source is sent
Line is with bank note to be measured or bill face into 80 degree -- and 90 degree.
3. the method as described in claim 1, it is characterised in that the light that secondary light source is sent and paper to be measured
Coin or bill are into 20 degree to 50 degree.
4. the method as described in claim 1, it is characterised in that further, if shooting the first two times difference
The symbol of acquisition or the color of figure then judge bank note or bill to be true to be particular color.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610261375.2A CN107316376A (en) | 2016-04-25 | 2016-04-25 | A kind of bank note based on color shifting ink, bill discrimination method |
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| CN201610261375.2A CN107316376A (en) | 2016-04-25 | 2016-04-25 | A kind of bank note based on color shifting ink, bill discrimination method |
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| CN107316376A true CN107316376A (en) | 2017-11-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113256873A (en) * | 2020-12-31 | 2021-08-13 | 深圳怡化电脑股份有限公司 | Paper money abnormality detection method, paper money abnormality detection device, electronic apparatus, and machine storage medium |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113256873A (en) * | 2020-12-31 | 2021-08-13 | 深圳怡化电脑股份有限公司 | Paper money abnormality detection method, paper money abnormality detection device, electronic apparatus, and machine storage medium |
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Application publication date: 20171103 |