WO2007108376A1 - 紙幣の真贋判定方法、及び紙幣の真贋判定装置 - Google Patents
紙幣の真贋判定方法、及び紙幣の真贋判定装置 Download PDFInfo
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- WO2007108376A1 WO2007108376A1 PCT/JP2007/055032 JP2007055032W WO2007108376A1 WO 2007108376 A1 WO2007108376 A1 WO 2007108376A1 JP 2007055032 W JP2007055032 W JP 2007055032W WO 2007108376 A1 WO2007108376 A1 WO 2007108376A1
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- light
- data
- banknote
- bill
- transmitted
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- 238000000034 method Methods 0.000 title claims abstract description 80
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000007723 transport mechanism Effects 0.000 claims description 14
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- 239000002932 luster Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 229910052618 mica group Inorganic materials 0.000 description 2
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- 239000000057 synthetic resin Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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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
Definitions
- the present invention relates to a bill authenticity determination method and a bill authenticity determination device.
- ATM automatic teller machine
- money changer has been provided with a device for determining the authenticity of paper.
- vending machines gaming machines such as slot machines and pachinko machines that pay out game media used in games such as medals, coins, and game balls according to the contents of the winning game, and games in which the game machines are installed
- Banknote authenticity determination devices are also installed in currency exchange machines or prepaid card vending machines installed on the market, and also in so-called inter-bed machines (so-called “sand”) arranged between pachinko machines.
- This kind of authenticity judgment device uses light reception data obtained by irradiating a bill with light and transmitted light or reflected light, and is prepared in advance with received light data obtained as a judgment target. Some of them are judged by comparing the received light data of genuine bills.
- a banknote is irradiated with red light and infrared light alternately, and transmitted light for each scanning of red light and infrared light is used as image data, and the image data is divided into a plurality of sections.
- there was a technique for determining whether or not the difference between the maximum value and the minimum value for each section is authentic see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Laid-Open No. 10-312480
- Patent Document 2 Japanese Patent Laid-Open No. 2005-234702
- An object of the present invention is to provide a bill authenticity determination method and a bill authenticity determination device capable of solving the above-mentioned problems.
- the present invention further includes, in addition to the transmitted light data of the light, when comparing a bill to be determined with a genuine note bill.
- the reflected light data of light in the specific area is used.
- the present invention provides the bill authenticity determination method according to the above (1) or (2), wherein the light emitting means can irradiate light of different wavelengths, and the bill to be determined and the authenticity When comparing with bills, the transmitted light data and Z or reflected light data of light of different wavelengths in the specific area are further used.
- the present application is the bill authenticity determination method according to any one of (1) to (3) above, wherein the specific region is obtained when light of different wavelengths is irradiated. It is characterized by including different areas of data.
- the present invention provides the bill authenticity determination method according to any one of (2) to (4) above.
- the transmitted light data and Z or reflected light data in the specific area are multiplied by a weighting factor.
- the present invention provides the bill authenticity determination method according to any one of (2) to (4) above.
- the amount of transmitted light data and Z or reflected light data in the specific region is increased more than the data amount of other regions.
- the banknote transport mechanism that transports the banknote to be determined, and the banknote transported by the banknote transport mechanism are irradiated with light, and the transmitted light that is irradiated and transmitted through the banknote is transmitted.
- An optical sensor for receiving light, weighting means for weighting received light data obtained by receiving light by the optical sensor in a specific area defined in the print area on the banknote surface, and an authenticity determination unit for determining the authenticity of the banknote
- the authenticity determination unit includes: storage means for storing reference light reception data in all print areas on the genuine note banknote surface including the specific area; the reference light reception data stored in the storage means; and the light
- a first comparison means for comparing the received light data in the entire print area of the banknote surface to be judged acquired by the sensor, and the banknote to be judged and the front of the genuine note banknote.
- Second comparison means for comparing the received light data with each other which are weighted in each specific area, and a bill authentication judgment apparatus having a.
- FIG. 1 is a schematic explanatory diagram of a banknote recognition apparatus as a banknote authenticity determination apparatus according to the present embodiment.
- FIG. 2 is a block diagram showing a control system of the bill identifying apparatus.
- ⁇ 3] It is a schematic explanatory view showing the front and back sides of a banknote.
- FIG. 5 is a main flowchart in the authentication program.
- FIG. 6 is a bill scanning timing chart showing the timing of irradiating a bill with infrared light and red light and receiving transmitted light and reflected light.
- FIG. 7 is a denomination direction discriminating process flowchart for discriminating the denomination and banknote conveyance direction.
- FIG. 8 is a flowchart showing authenticity determination processing.
- the print area on the surface of the banknote for example, an area where images obtained under visible light and infrared light are different from each other is determined in advance as a specific area, and the red in the specific area is determined. Compare the transmitted light data in the entire print area on the banknote surface by weighting the transmitted light data of outside light more than the transmitted light data obtained from other areas and comparing these weighted data. However, the accuracy of authenticity determination is made higher.
- the genuine note banknote has regions where images obtained under visible light and infrared light are different from each other.
- the transmitted area data by infrared light in the specific area is acquired with the area to be applied as the specific area, and the acquired transmitted light data and the transmitted light data in the same specific area of the genuine note acquired in advance are respectively obtained. Weighting is performed and the weighted data are compared. By using a powerful method, it is possible to more accurately determine whether or not the bill to be determined is a genuine note.
- the transmitted light data is Since it can be expressed by a gray value, that is, a density value (luminance value), it can be determined by a correlation coefficient calculated by substituting it into an appropriate correlation equation.
- the reflected light data of the light in the specific area may be used.
- the determination accuracy can be further improved.
- the reflected light data is easier to compare than the transmitted light data. In such a case, a determination may be made by weighting only the reflected light data.
- the light emitting means can irradiate light of different wavelengths, and when comparing the bill to be determined and the genuine bill, transmitted light data of light of different wavelengths in the specific region and Z or Let's use the reflected light data further.
- the light emitting means is configured to be able to irradiate infrared light and red light, and when comparing a bill to be judged with a genuine bill, transmitted light data and Z or reflection of infrared light in the specific region In addition to optical data, red transmitted light data and Z or reflected light data can be further used.
- the transmitted light data and the reflected light data are weighted. Note that the degree of weighting can be varied for each received light data obtained from transmitted light and reflected light of different wavelengths, and the accuracy of authenticity determination can be further improved.
- the specific area includes different areas of data obtained when light of different wavelengths is irradiated. For example, in addition to the above-described “watermark” region, a region where a latent image is printed and a region printed with pearl ink are also included. There are other areas of banknotes that have different data obtained when irradiated with light of different wavelengths, and setting at least two areas as specific areas can improve the accuracy of authenticity determination. preferable.
- the latent image is one of anti-counterfeiting technologies. For example, it is not visible when viewed directly, but appears when viewed from an angle, as is applied to current banknotes in Japan (Bank of Japan). It is an image. In Japanese banknotes, when a banknote is tilted in an area where nothing can be seen when viewed directly, characters such as “NIPPON” appear and become visible.
- the hidden "NIPPON" I learned that it is possible to recognize characters.
- an optical sensor that irradiates light with a wavelength near 950 nm, which is general and inexpensive, and a wavelength near 950 nm is used as a wavelength within a predetermined range.
- the force used The wavelength within the predetermined range is not limited to the strong wavelength. That is, as long as the wavelength is included in the near infrared region, a wide range of intermediate forces can be used as appropriate.
- each of infrared light having a wavelength near 950 nm in the above range is used.
- the difference between the two may appear more prominently, which is extremely effective for authenticity determination.
- it can be expected that the difference between genuine bills and counterfeit bills will become clearer by comparing transmitted light data with weights.
- the pearl ink is used to prevent counterfeiting, and when the bill is tilted, a pearly luster with a slightly pink color appears on the printed part. It is known that printing with powerful pearl ink is difficult to counterfeit. Therefore, authenticity determination can be performed easily and accurately by comparing the judgment target banknote and the genuine note for the area printed with pearl ink using the weighted transmitted light data and reflected light data.
- pearl ink is an ink containing a pearl pigment in which natural mica is coated with a metal oxide such as titanium oxide or iron oxide, and has a high refractive index titanium oxide layer and a refractive index. Since multiple reflected light at the boundary with the low-rate mica and the surrounding medium interferes to create a unique pearly luster, it is not easy to produce a par ink that can produce exactly the same reflected light. Therefore, if the area printed with powerful pearl ink is weighted, the authenticity of a genuine note and a counterfeit bill can be accurately determined. is there.
- transmitted light data and reflected light data acquired from a specific area are given a predetermined weight than data acquired from other area forces in the printing area on the paper surface. .
- the predetermined weighting for example, it is conceivable to multiply the transmitted light data and Z or reflected light data in the specific area by a weighting factor.
- the density value of the acquired data force is multiplied by a weighting magnification or the like to increase the comparison range of the calculated values.
- the determination accuracy is further improved.
- the value of the weighting factor can be set in various ways, it is possible to deal with various appraisals only by changing the value of the weighting factor after data acquisition.
- the waveform when comparing with the analog waveform indicating the density (luminance) generated from the transmitted light data and Z or reflected light data in the specific region, the waveform is enlarged at a predetermined magnification. It is possible to make it. In this case, since the enlarged waveforms are compared with each other, the determination accuracy is further increased.
- the transmitted light data and Z in the specific area may be used.
- the amount of reflected light data can be exaggerated [] more than the amount of data in other areas (or the coordinate density in a specific area is more dense than in other areas).
- an LED array in which a large number of LEDs are linearly used is suitably used as a light emitting means for infrared light or red light.
- a powerful LED array to irradiate areas other than a specific area, it is possible to drive by thinning out the LEDs and drive all LEDs in the specific area. Energy-saving effect can be expected by using powerful methods.
- the specific area can be specified by coordinates on the banknote surface area. . Therefore, by controlling the banknote transport speed by the banknote transport mechanism provided in the authenticity determination device, which will be described later, in a specific area, the transport speed is lower than in other areas, and the amount of transmitted light data or reflected light data is increased. Is also possible.
- the banknote transport mechanism that transports the banknotes to be judged, and the banknotes transported by the banknote transport mechanism are irradiated with light, and the transmitted light that is irradiated and transmitted through the banknotes and the reflected light that is reflected from the banknotes are received.
- the authenticity determination unit is obtained by storing a reference light reception data in the entire printing area of the genuine note surface including the specific area, the reference light reception data stored in the storage means, and the optical sensor.
- First comparing means for comparing the received light data in the entire printed area on the surface of the banknote to be determined, and the specific areas of the banknote to be determined and the genuine note banknote. Is the Chi a configuration and a second comparison means for comparing the received light data with each other which are weighted in.
- the banknote transport mechanism can use a roller, a belt, or the like. Further, the authenticity determination unit can be configured by a microcomputer camera including a CPU and ROM, RAM, etc. as storage means.
- the said banknote conveyance mechanism may be provided in a banknote conveyance unit
- the said authenticity determination part may be provided in an authenticity determination unit
- Light-receiving data in the entire printed area of the banknote surface including light data, transmitted light data and reflected light data by red light and a program for weighting the light-receiving data in the specific area are stored in advance. I can leave.
- the light reception data of the bill to be determined is acquired by the optical sensor and stored in the RAM, and the light reception data and the reference data are compared by the first comparison means and the second comparison means.
- authenticity determination is performed.
- the authenticity determination unit which is different from each other in hardware configuration, can share the function.
- the LED array as described above can be used.
- a first light emitting array that emits infrared light and a second light emitting array that emits red light are disposed.
- a synthetic resin rectangular rod-like body force in which an LED element is attached to one end and a light guide is provided inside can be suitably used.
- the light emitting means having a powerful structure can uniformly irradiate the light of the LED element power.
- the banknote authenticity determination device By using the banknote authenticity determination device described above, even if the received light data on all printed surfaces of the banknotes are similar in comparison between the received light data, it is possible to compare the received data in the weighted specific area. Therefore, it is possible to accurately determine the authenticity. In this case, the weight can be changed for each denomination.
- the reflected light data is used as the received light data. Further, the infrared light alone is used as the light applied to the banknote, and red light is added. In the comparison between data, if even one of them deviates from the level that can be judged as a genuine note, it can be judged as a counterfeit bill, and the judgment accuracy can be remarkably improved.
- the genuine reference data when stored in the storage means, it may be stored in advance in the storage means and incorporated in the authenticity determination device. For example, after the authenticity determination device is assembled, Light-receiving data can be acquired while being conveyed through the banknote conveying mechanism and stored as reference data. Therefore, it is possible to store the corresponding optimized reference data for each authenticity determination device.
- the reference data is updated using means such as moving average, the reference data is adapted to output fluctuations without performing white correction at any time in order to cope with aging of the hardware. It can be optimized.
- the transmitted light data of infrared light transmitted through the entire print area on the surface of the bill to be determined is compared with the reference data.
- a predetermined weighting is performed on the transmitted light data of the infrared light in a specific area specified in advance in the printing area on the banknote surface, and the weighted data are set as determination targets. It is also possible to simultaneously compare without dividing the force described in the second comparison step for comparing between the bill and the genuine note bill.
- an authentication program in which a correlation expression for comparison including a relational expression for weighting is incorporated in advance is used.
- the infrared light transmitted light data transmitted through the entire printed area of the genuine note banknote and the reference data previously weighted to the specific area in the reflected red light reflected data are stored in the storage device. .
- a waveform representing a luminance value (concentration value) can be generated as the data and compared with this waveform.
- a banknote transport mechanism that transports a banknote to be judged, and a banknote transported by the banknote transport mechanism irradiates light, and the transmitted light that has been irradiated and transmitted through the banknote and the reflection reflected from the paper
- An optical sensor for receiving light, weighting means for weighting received light data detected by the optical sensor in a specific area defined in the print area on the banknote surface, and an authenticity for executing the authenticity determination method described above.
- the fixed unit includes a storage unit that stores reference data in the entire printing area of the banknote surface including the specific area, a reference data in the entire printing area that is stored in the storage unit, and a determination target that is acquired by the light sensor.
- Comparison means capable of comparing the received light data in the entire printed area of the bill surface and comparing the weighted received light data in the specific areas of the bill to be determined and the genuine note banknote.
- An authenticity determination device having a configuration including:
- FIG. 1 is a schematic explanatory diagram of a banknote identification device as a banknote authenticity determination device according to the present invention
- FIG. 2 is a block diagram showing a control system of the banknote identification device
- FIG. FIG. 4 is an explanatory diagram of a reference data table stored in the reference data storage unit.
- banknote recognition apparatus 1 is described as being provided in a game machine currency exchange machine or a prepaid card vending machine in which slot machines or pachinko machines are installed. It can also be applied to automated teller machines and currency exchange machines installed in banks.
- the banknote recognition apparatus 1 is provided with transport rollers 11 and 11 composed of a pair of upper and lower rollers l la and l ib at a predetermined interval on the front and rear sides of the banknote transport path 10.
- a bill detection sensor 12 is provided on the starting end side of the bill transport path 10, that is, in the vicinity of a bill insertion slot (not shown).
- a first light emitting unit 3 that can irradiate infrared light and red light is disposed on the upper side of the banknote 2 to be transported, and the bottom of the banknote 2 is sandwiched.
- a light receiving portion 4 having a light receiving sensor is disposed opposite to the first light emitting portion 3.
- a second light emitting unit 5 that can also emit infrared light and red light is disposed adjacent to the light receiving unit 4.
- the transport roller 11, the bill detection sensor 12, the first light emitting unit 3, the second light emitting unit 5, and the light receiving unit 4 are controlled by a control unit 6 connected by wiring (not shown).
- the banknote transport path 10, the transport roller 11, and the banknote transport mechanism and the banknote detection sensor 12 including the drive system of the transport roller 11 are connected to the banknote transport unit la.
- the first light-emitting unit 3, the second light-emitting unit 5, the light-receiving unit 4, and the control unit 6 are disposed in the case of the money changer or the prepaid card vending machine as an authentication unit lb. .
- the control unit 6 functions as an authenticity determination unit for the banknote 2 as will be described later, and the arrangement location is not necessarily limited to the authenticity determination unit lb.
- the control unit 6 may be provided outside the authenticity determination unit lb.
- the banknote detection sensor 12 disposed in the banknote transport unit la and the drive motor 1 lc for driving the transport roller 11 are electrically connected to the control unit 6. It is connected to the.
- the drive motor 11c is connected to the control unit 6 via a motor drive circuit id.
- the transport roller 11 constituting the banknote transport mechanism may be replaced with a transport belt or the like.
- the light receiving unit 4 is formed in a strip shape extending in the crossing direction with respect to the banknote transport path 10 and having a width that does not affect the sensitivity of a light receiving sensor (not shown) provided in the light receiving unit 4. It is formed in a thin plate shape. In the present embodiment, the light receiving unit 4 is arranged at the approximate center of the banknote transport path 10.
- the light receiving sensor is a so-called line in which a plurality of CCDs (Charge Coupled Devices) are provided in a line shape in the center of the light receiving unit 4 in the thickness direction, and a Selfox lens array is also arranged in a line shape above the CCD. It is used as a sensor.
- CCDs Charge Coupled Devices
- the reflected light of infrared light or red light from the first light emitting unit 3 or the second light emitting unit 5 irradiated toward the banknote 2 to be authenticated is received as transmitted light data. It is possible to generate grayscale data according to the brightness and to generate a two-dimensional image from this grayscale data.
- the first light emitting unit 3 serving as a light source for transmission disposed opposite to the light receiving unit 4 is provided with light from an LED element attached to one end. It is a rectangular rod-shaped body made of synthetic resin that can be irradiated uniformly throughout the light body.
- the first light emitting unit 3 is arranged in a line in parallel with the light receiving unit 4 (light receiving sensor).
- the second light emitting unit 5 serving as a light source for reflection has the same configuration as the first light emitting unit 3, and is arranged in a line.
- the light receiving unit 4 in the banknote transport direction is configured such that light can be emitted toward the banknote 2 at an elevation angle of 45 degrees, and reflected light from the banknote 2 is received by the light receiving unit 4 (light receiving sensor). It is arranged at an appropriate interval on the lower side.
- the first The arrangement of the first, second light emitting units 3, 5 and the light receiving unit 4 is not limited to the present embodiment, and can be appropriately laid out.
- the light emitted from the second light emitting unit 5 is incident on the light receiving unit 4 (light receiving sensor) at 45 degrees.
- the incident angle is not limited to 45 degrees and can be set as appropriate as long as the reflected light can be reliably received. Accordingly, the design of the arrangement of the second light emitting unit 5 can be changed as appropriate according to the structure of the banknote identification measure 1.
- the second light emitting unit 5 is also installed on the opposite side across the light receiving unit 4 so that light is irradiated at an incident angle of 45 degrees from both sides. Like to do.
- the control unit 6 includes a CPU (Central Processing Unit) 60, a ROM (Read Only Memory) 61, a RAM (Random Access Memory) 62, and a reference data storage unit 63 on a substrate. And functions as the authenticity determination unit of the banknote 2.
- CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- the ROM 61 stores various programs including the authentication program executed by the CPU 60 and permanent data.
- the CPU 60 operates according to the program stored in the ROM 61, but operates according to the IZO port.
- the input / output of signals with the above-described other components is performed via the, and the operation control necessary for authenticity determination in the banknote recognition apparatus 1 is performed.
- the RAM 62 stores data and programs used when the CPU 60 operates
- the reference data storage unit 63 stores the reference data used when determining the authenticity of the banknote, that is, the genuine banknote.
- the grayscale data acquired from all the print areas is stored as reference light reception data for each of the transmitted light of infrared light, reflected light, transmitted light of red light, and reflected light.
- the reference data is stored in the dedicated reference data storage unit 63, but may be stored in the ROM 61.
- reference data (a) related to transmitted infrared light and reference data related to reflected light (infrared light) are stored in predetermined areas of the reference data storage unit 63.
- b) Red light Four types of reference data storage tables storing reference data (c) related to transmitted light and reference data (d) related to reflected light of red light are stored.
- the reference data storage table includes grayscale data by reflected light of red light, grayscale data by transmitted light, and grayscale data by reflected light of infrared light.
- the density data by transmitted light is 7 types of denominations (Thousand denominations of 1,000 yen, 5,000 yen, 10,000 yen for new banknotes, 1,000 yen, 2,000 yen, 5,000 yen, 10,000 yen for old banknotes) , And when the banknote 2 is inserted with the front side facing up and the back side facing up, or when the banknote 2 is inserted in either the left or right direction (in this embodiment, the right direction).
- 7 X 2 X 1 14 grayscale data are stored in the reference data storage table.
- the insertion direction of the banknote 2 is determined. If the insertion direction is the left direction, the stored reference data is reversed and applied.
- the grayscale data can also be stored as a two-dimensional image.
- the data acquired from the specific area 20 that is predetermined in the print area on the surface of the banknote 2 and has different visibility under the red light and the infrared light that are visible light are specified standards.
- the data is stored in the reference data storage unit 63 as data.
- the specific area 20 will be described.
- various technologies have been applied to Japanese banknotes 2, namely banknotes, as anti-counterfeiting technologies.
- the surface of the banknote 2 has a watermark area 20a with an increased or decreased fiber thickness, and a latent image area 20b that appears when looking directly at the eyelids that cannot be seen.
- the printing area is slightly pinkish and the pearly luster emerges.
- Special printing area 20c with pearl ink Further, infrared light is transmitted but infrared light is not transmitted. Region 20d is formed.
- the watermark area 20a and the latent image area 20b are formed on the back surface of the banknote 2 even when V is on the back surface.
- the area 20d is an area that is difficult to counterfeit.
- the watermark area 20a, the latent image area 20b, and the special print area 20c are reflected by reflected light of infrared light or red light. This is useful for determining the authenticity of the banknote 2 because there is a significant difference in the brightness of the transmitted light and the infrared light transmitting region 20d has a characteristic that red light does not pass through.
- these are set in the specific area 20, and the position of each specific area 20 on the banknote 2 is defined by coordinates.
- the latent image area 20b it was difficult to recognize a latent image by transmitted light, but an image can be recognized by infrared light having a wavelength of about 950 nm used in this embodiment. It can be used effectively as an element of authenticity judgment.
- infrared light having a wavelength near 950 nm is formed in the latent image area 20b.
- the latent image area 20b is also used as the specific area 20 for authenticity determination. Therefore, the infrared light irradiated by the first light emitting unit 3 and the second light emitting unit 5 has a wavelength of 950 nm.
- the reference data storage unit 63 of the banknote recognition apparatus 1 in the present embodiment stores the reference data and the specific reference data including both the reference data force and the density data force extracted for the specific region 20. Is stored in advance.
- the specific reference data the specific reference data related to the transmitted light of infrared light, the specific reference data related to the reflected light of infrared light, the specific reference data related to the transmitted light of red light, and the reflected light of red light.
- the specific reference data is tabulated and stored in a predetermined area of the reference data storage unit 63.
- the banknote recognition device 1 in addition to comparing the density data of the entire banknote between the genuine banknote and the banknote to be determined, the specific region 20 described above.
- Light intensity data transmitted light data and reflected light data It is characterized in that it is possible to accurately determine the authenticity by weighting and comparing the weighted grayscale data.
- specific reference data grayscale data generated from transmitted light data of red light and infrared light transmitted through the specific area 20, and reflected light data power of red light and infrared light reflected from the specific area 20 are also generated.
- the weight data described below is applied to each of the printed data, and when the authenticity of banknote 2 is determined, the density data in the entire print area acquired from banknote 2 to be determined is compared with the reference data.
- the density data in the specific area 20 is extracted from the density data of the bill 2, and weighted in the same way as the specific reference data, and further compared between the specific gray data weighted together and the specific reference data. It is.
- the banknote recognition apparatus 1 when the banknote 2 to be determined is inserted and transported from the banknote transport port, the first light emitting unit 3 is placed in the print area on the surface of the banknote 2. From the second light emitting unit 5, infrared light and red light of the same wavelength irradiated on the genuine note banknote are irradiated, and the transmitted light data and reflected light data of the infrared light and red light transmitted through the banknote 2 are used. The obtained four types of grayscale data are developed in the RAM 62, and the four types of reference data (infrared transmitted light and reflected light, red transmitted light and reflected light) stored in the reference data storage unit 63, respectively.
- the specific weight data obtained from each of the transmitted light data and reflected light data of infrared light and red light in the specific area 20 is weighted in the same manner as the genuine bills.
- 4 types of specific grayscale data are displayed in RAM 62 Open and compare these with the four types of specific reference data in a one-to-one correspondence and sequentially compare them, and if even one comparison result is NG, it is determined to be a fake bill.
- FIG. 5 is a main flowchart in the authenticity determination program
- FIG. 6 is a bill scanning timing chart showing the timing of irradiating the bill 2 with infrared light and red light and receiving transmitted light and reflected light
- the authenticity determination program irradiates the control unit 60 with infrared light of the predetermined wavelength from the first light emitting unit 3 and the second light emitting unit 5 which are light emitting means, in the printing area on the surface of the banknote 2 to be determined.
- a first comparison step for comparing the transmitted light data of the infrared light transmitted through the banknote and the reference data stored in advance, and each of the banknote 2 to be determined and the genuine banknote banknote Based on the comparison result in the step of applying a predetermined weight to the transmitted light data of the infrared light in the specific region 20, the second comparison step of comparing the weighted data, and the first and second comparison steps. , And a step of executing the step of determining the authenticity of the bill.
- the CPU 60 of the control unit 6 of the banknote recognition apparatus 1 determines whether or not the banknote detection sensor 12 (see FIGS. 1 and 2) has detected the banknote 2 (step S01). .
- step S01 When the banknote detection sensor 12 detects the banknote 2, it is determined that the banknote 2 has been inserted into the banknote insertion slot (Yes in step S01), and the CPU 60 outputs a transport signal to the motor drive circuit id and drives the drive motor 11c. Driven to rotate the transport roller 11, the inserted banknote 2 is transported at a predetermined speed. In the present embodiment, as shown in FIG. 1, the bill 2 is transported in a vertically long direction.
- the CPU 60 of the control unit 6 outputs an irradiation signal to the first and second light emitting units 3 and 5, and outputs red light and infrared light, which are visible light rays, from the light emitting units 3 and 5, respectively.
- a reading process of density data of the entire printing area on the surface of the banknote 2 is executed to generate a two-dimensional image (step S02).
- the first and second light emitting units 3 and 5 are arranged in a line extending in the crossing direction with respect to the banknote transport path 10, the first and second light emitting units 3 and 5 are output.
- the light that illuminates the banknote 2 is full.
- the irradiated red light and infrared light are transmitted or reflected from the entire surface of the banknote 2, and the transmitted light and reflected light are input to the light receiving sensor of the light receiving unit 4.
- the light receiving sensor is also a line sensor, the reflected light and transmitted light of each light beam can be detected over the entire length, and the grayscale data can be read.
- the red light and the infrared light of the first light emitting unit 3 and the second light emitting unit 5 that is, the red light and the infrared light.
- Transparent Four light sources consisting of an excessive light source and a light source for reflecting red light and infrared light are repeatedly turned on and off at regular intervals, and the phase of each light source does not overlap.
- the light source is not turned on at the same time. In other words, when one light source is on, the other three light sources are off.
- the light from each light source is detected at regular intervals, the transmitted light and reflected light of red light, the transmitted light of infrared light, and It is possible to read an image that also has a density data strength of the printed area of the banknote 2 by reflected light.
- the CPU 60 of the control unit 6 performs a denomination direction determination process, and denominations of the inserted banknote 2 (for example, 1,000 yen, 5,000 yen, 10,000 yen for new banknotes, 1000 for old banknotes). Yen, Yen 2000, Yen 5000, and Yen 10,000 denominations) and the direction of insertion (the surface of banknote 2 is up or down, and the direction in which banknote 2 is inserted is distinguished in four directions) ) Is determined (step S03).
- the denomination direction determination process will be described in detail later.
- the CPU 60 of the control unit 6 determines whether or not the denomination and the transport direction can be determined (step S04). For example, the banknote is significantly soiled or missing. If it is not possible to discriminate (No in step S04), the process moves to step S09 to perform bill discrimination NG processing. In this bill discrimination NG process, the CPU 60 outputs a signal for reversely rotating the drive motor 11c to the motor drive circuit id, forcibly returns the bill 2 to the bill insertion slot by reversely rotating the transport roller 11, and step S01. Migrate to
- step S05 the position is corrected so that the two-dimensional image acquired within a certain range is powered and the correlation coefficient with the reference data is maximized.
- step S06 the authenticity of the banknote is determined.
- the number of phase relationships between the acquired data and the reference data and the absolute value of the difference are calculated using four light sources (infrared transmission, red (External reflection, red transmission, red reflection) are calculated.
- a specific area is extracted and weighted, and a weighted correlation coefficient is calculated for the four light sources.
- the watermark area 20a is extracted from the transmission data, the differential coefficient is taken inside, and the size is calculated.
- the correlation coefficient is calculated with the specific reference data in the watermark area 20a. And all the calculated correlation coefficients If all are within the specified range, it is determined to be a genuine note.
- step S07 If it is determined that the bill is a genuine note as a result of the authenticity judgment (Yes in step S07), the process proceeds to step S08, and bill recognition OK processing is performed in which bill 2 is handled as a genuine note, for example, exchange or prepaid Perform processing such as card sales.
- Step S09 bill recognition NG processing is executed (Step S09).
- the banknote recognition NG process is performed differently from the process at step S04. For example, the inserted banknote 2 is stored without being returned. If so, it would be desirable to notify the amusement hall manager or police authorities.
- the denomination / direction determination process in step S03 will be described in detail.
- the reference data storage unit 63 of the control unit 6 stores 7 denominations for each of the four types of light (infrared light transmission light, reflection light, red light transmission light, reflection light), and reference data in the right direction. Is stored as described above.
- the CPU 60 of the control unit 6 first makes the whole surface of the banknote 2 that is the object of authenticity determination being conveyed, that is, the total printing area force, the obtained density data force, and the generated two-dimensional image. From the image, for example, data related to transmitted light data of infrared light is selected (step Sl l).
- Step S12 check the similarity between the acquisition data of 7 denominations ⁇ 4 directions and the reference data, and 28 types (if the insertion direction of the banknote 2 is leftward, the rightward data is reversed) (Step S12). Specifically, correlation coefficient R expressed by the following formula is used as an index indicating similarity.
- [Number 1] (./ '[. /]--
- [U] is the coordinate of the banknote
- the density value (luminance value) of the two-dimensional image of the acquired data from the paper money 2 to be determined at the banknote coordinate [U] is expressed as f [i, j ]
- the density value in the reference data is s [i, j]
- the average density in the acquired data is F
- the average density in the reference data is S
- the correlation coefficient R takes a value from -1 to +1, and the closer to +1, the higher the similarity is determined. Then, all the correlation coefficients with the reference data in each of the four directions of 7 denominations are calculated, and the denomination and direction showing the highest value are determined as the denomination direction of the inserted banknote 2 to be judged. judge.
- the direction of the denomination is identified regardless of the above-described method using power. If it is about the extent, it is not necessary to identify the entire print area.
- the correlation coefficient with the reference data is calculated with three lines in the three directions of the long side of the acquired data (the center of banknote 2, approximately 9 mm from the upper side, approximately 9 mm from the lower side), and the average of the three lines is the highest.
- the object may be determined as the denomination and direction of the bill 2 to be verified. In this case, since the determination becomes simple, the determination time can be shortened.
- step S13 the CPU 60 performs the determination in the process of step S12 (step S13), and if there is a suitable denomination according to the determination result, the suitable denomination is determined for later authenticity determination processing.
- An identification code for determining the direction is set (step S14), and the process proceeds to step S04.
- step S15 an identification code with no compatible banknote is set (step S15), and the process proceeds to step S04.
- the CPU 60 compares the density data acquired from the banknote 2 to be determined for each of the four types of light (infrared light transmitted light, reflected light, red light transmitted light, and reflected light). Then, the similarity in the entire printing area of the banknote surface is calculated with reference data stored in advance (step S21). At this time, the correlation coefficient R and the absolute difference sum SUM represented by the following formula are used.
- [U] is the coordinate of the banknote
- the density value (luminance value) of the two-dimensional image of the acquired data from the paper money 2 to be determined at the banknote coordinate [U] is expressed as f [i, j ]
- the density value in the reference data is s [i, j].
- step S22 whether or not the force is within the allowable range between the correlation coefficient R and the absolute difference sum SUM is determined. At this time, the closer the correlation coefficient R is to +1 and the closer the absolute difference sum SUM is to 0, the closer to the reference data. If it is out of the permissible range (No in step S22), it is determined to be a fake bill, a code indicating that it is a fake bill is set (step S30), and the process proceeds to step SO7. On the other hand, if the value of correlation coefficient R is within the allowable range in step S24 (Yes in step S22), the process proceeds to step S23.
- the correlation coefficient RW + is calculated by assigning a large weight between the data extracted from the specific area 20 and the specific reference data.
- the specific area 20 set here is a latent image area 20b and a special print area 20c, and these areas are areas having different shades of red light and infrared light. There is a negative correlation with infrared light.
- a weight map calculated in advance is prepared, and the weighted correlation number RW + shown below is calculated.
- a weighted correlation coefficient is calculated using a weight map for transmitted light for transmitted light of red light and infrared light, and a weight map for reflection for reflected light.
- the weight w [i, j] at each coordinate defining the specific region 20 can be determined from the specific reference data of red light and infrared light by the following formula, You may calculate the weight w [i, j] every time you make a serious decision!
- [U] is the coordinate of the banknote
- the density value (luminance value) of the specific reference data of the red light of the paper 2 to be judged at the banknote coordinate [U] is sf [i, j]
- the density value in the infrared specific reference data is Sir [i, j]
- the red light specific reference data average density is Sr
- the infrared specific reference data average density is Sir.
- C is a weighting factor coefficient, which is a value determined appropriately.
- step S24 it is determined whether or not the correlation coefficient RW + is within a permissible range. Since the weighted correlation coefficient RW + takes a value of 1 to +1, it is determined that the closer to +1, the closer to the specific reference data. If it is outside the permissible range (No in step S24), the code is determined to be a fake bill and the determination result is a fake bill (step S30), and the process proceeds to step S07. On the other hand, if the allowable range is determined in step S 24 (Yes in step S 24), the process proceeds to step S25.
- step S25 the CPU 60 extracts the data area 20a from the data force acquired from the banknote 2 to be determined, and calculates the density value. In other words, it is possible to extract only the watermark area 20a by preparing a mask with the watermark area 20a white and the other black for each denomination and multiplying the acquired 2D image with the mask. .
- step S26 determines whether or not the density of the watermark area 20a is within the allowable range. If the density is out of the allowable range (No in step S26), the CPU 60 determines that it is a fake bill. The code that the result is a fake bill is set (step S30), and the process proceeds to step S07. On the other hand, if the allowable range is determined in step S26 (Yes in step S26), the process proceeds to step S25. [0105] Next, the CPU 60 calculates a correlation coefficient R in order to see the similarity between the acquired two-dimensional image of the watermark region 20a and the two-dimensional image generated from the reference data (step S27).
- step S28 determines whether or not the correlation coefficient R is within the allowable range. If the correlation coefficient R is out of the allowable range (No in step S28), the CPU 60 determines that it is a fake bill and the determination result is The code that is a fake bill is set (step S30), and the process proceeds to step S07. On the other hand, if the allowable range is determined in step S28 (Yes in step S28), the process proceeds to step S29, a code indicating that the determination result is a genuine note is set (step S29), and the process proceeds to step S07. Transfer.
- the light source when comparing the bill to be determined and the genuine note, four types of infrared light transmitted light and reflected light and red light transmitted light and reflected light are used.
- the light source is used, at least the transmitted light data of infrared light may be used.
- the wavelength is preferably 950 nm or a wavelength in the vicinity thereof as in the above-described embodiment.
- the determination is made based on the correlation coefficient when performing the authenticity determination.
- an analog waveform is generated from the received data, and the shapes of the waveforms are compared. It can also be determined by comparison. When weighting and comparing, this waveform can be enlarged to improve the determination accuracy.
- the first comparison step of comparing the reference data with the transmitted light data of the infrared light transmitted through the entire print area of the banknote surface to be determined, and the paper surface A predetermined weight is applied to the transmitted light data of the infrared light in a specific area specified in advance in the print area, and the weighted data is determined between the bill to be determined and the genuine note bill.
- the second comparison step which compares between the two, has been described separately, but it is also possible to compare at the same time without division.
- the transmitted light in the specific area 20 is used. Data amount and data amount of Z or reflected light data than the data amount of other areas Even the way to increase it, too.
- the banknote transport mechanism controls the banknote transport speed to lower the transport speed than other areas and increase the amount of transmitted light data and reflected light data. You may make it make it. In other words, the data density is increased by making the coordinate density denser.
- the authenticity is determined according to the flow from step S21 to S28 shown in FIG. 8, but the determination using the special area 20, that is, only step S23 and step S24.
- the special area 20 that is, only step S23 and step S24.
- Light having a predetermined wavelength is emitted from the light emitting means to the printing area on the surface of the genuine note banknote, and transmitted light data of the light transmitted through the genuine note banknote (for example, two data generated from grayscale data).
- a predetermined wavelength for example, infrared light
- transmitted light data of the light transmitted through the genuine note banknote for example, two data generated from grayscale data
- a first comparison step for comparing transmitted light data of light transmitted through the banknote and the reference data, and a predetermined area in the print area on the banknote surface, (For example, a region where images obtained under visible light and infrared light such as red light are different from each other is determined in advance as a specific region), the specific region 20 (for example, the bill to be determined and the genuine bill) , Watermark area 20a, latent image area 20b, special print area 20c
- a bill authenticity determination method for determining the authenticity of a bill based on the comparison results in the first and second comparison
- a specific area 20 for example, watermark area 20a, latent image area 20b, special print area 20c, infrared light
- Irradiated infrared light having a predetermined wavelength is irradiated from the light emitting means to the printing area of the genuine bills determined as the light transmission area 20d), and transmitted light data of infrared light transmitted through the genuine bills (for example, density data) (A two-dimensional image or waveform generated from the above) is preliminarily stored as reference data in the weighted data transmitted through the specific area, while the data on the banknote surface to be judged is stored in the print area.
- Irradiating infrared light of the predetermined wavelength from the light emitting means for example, the first light emitting unit 3 and the second light emitting unit 5
- the light emitting means (for example, the first light emitting unit 3 and the second light emitting unit 5) can irradiate light of different wavelengths (for example, red light or infrared light).
- the bill authenticity judgment method further uses transmitted light data and Z or reflected light data of light of different wavelengths in the specific area 20 when comparing the bill to be judged and the genuine note bill.
- the specific area 20 has different data areas (for example, a watermark area 20a, a latent image area 20b, A bill authenticity judgment method including a special printing area 20c and an infrared light transmission area 20d).
- the method for determining the authenticity of a bill which multiplies the transmitted light data and Z or reflected light data in the specific region by a weighting factor as the predetermined weight.
- the transmitted light data and the data amount of Z or reflected light data in the specific area are used as the predetermined weights.
- a banknote transport mechanism (for example, including a transport roller 11, a drive motor 11c, and a motor drive circuit id) that transports a banknote to be determined, and a paper transported by the banknote transport mechanism.
- a light sensor for example, a first light-emitting unit 3, a second light-emitting unit 5, a light-receiving unit 4 and a force sensor that receives transmitted light that has been irradiated and transmitted through the bill and reflected light reflected from the bill).
- a specific area for example, a watermark area 20a, a latent image area 20b, a special print area 20c, and an infrared light transmission area 20d
- a weighting means for weighting the received light data for example, the control unit 6) and an authenticity determination unit for determining the authenticity of the banknote 2 (for example, the CPU 60 of the control unit 6).
- Storage means for storing reference light reception data for example, reference data storage unit 63 or ROM 61
- reference light reception data in all the print areas stored in the storage means
- banknotes to be determined obtained by the optical sensor
- First comparison means e.g., the control unit 6) that compares the received light data in the entire print area on the front surface with each other and the weighted received light data in the specific areas of the banknote to be determined and the genuine note banknote.
- a second comparison means for example, the control unit 6).
- the embodiment of the present invention has been described by taking the banknote identification device 1 that performs authenticity determination of the banknote 2 as an example. In addition to the above, it can also be applied to methods and devices for determining the authenticity of foreign currencies such as US dollar bills, so-called cash vouchers and other securities.
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Abstract
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Priority Applications (5)
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CN2007800093131A CN101405772B (zh) | 2006-03-16 | 2007-03-14 | 鉴定纸币真伪的方法和装置 |
JP2008506256A JP5314419B2 (ja) | 2006-03-16 | 2007-03-14 | 紙幣の真贋判定方法、及び紙幣の真贋判定装置 |
US12/293,144 US8260027B2 (en) | 2006-03-16 | 2007-03-14 | Bank note authenticating method and bank note authenticating device |
EP07738503A EP2000990A4 (en) | 2006-03-16 | 2007-03-14 | BANKNOTE AUTHENTICATION PROCEDURE AND BANKNOTE AUTHENTICATION DEVICE |
US13/562,517 US8433125B2 (en) | 2006-03-16 | 2012-07-31 | Bank note authenticating method and bank note authenticating device |
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US12/293,144 A-371-Of-International US8260027B2 (en) | 2006-03-16 | 2007-03-14 | Bank note authenticating method and bank note authenticating device |
US13/562,517 Continuation US8433125B2 (en) | 2006-03-16 | 2012-07-31 | Bank note authenticating method and bank note authenticating device |
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EP (1) | EP2000990A4 (ja) |
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AU2001284042A1 (en) * | 2000-08-31 | 2002-03-13 | Bundesdruckerei Gmbh | A certified paper and an apparatus for discriminating the genuineness thereof |
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DE102004059951A1 (de) * | 2004-08-17 | 2006-02-23 | Giesecke & Devrient Gmbh | Vorrichtung zur Untersuchung von Dokumenten |
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- 2007-03-14 JP JP2008506256A patent/JP5314419B2/ja active Active
- 2007-03-14 US US12/293,144 patent/US8260027B2/en active Active
- 2007-03-14 CN CN2007800093131A patent/CN101405772B/zh active Active
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2012
- 2012-07-31 US US13/562,517 patent/US8433125B2/en active Active
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JP2004227093A (ja) * | 2003-01-20 | 2004-08-12 | Asahi Seiko Kk | 紙幣識別装置における紙幣検出装置 |
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JP2011505632A (ja) * | 2007-11-30 | 2011-02-24 | ハネウェル・インターナショナル・インコーポレーテッド | 認証可能マーク、そのマークを準備するためのシステム、及びそのマークを認証するためのシステム |
JP2014120085A (ja) * | 2012-12-19 | 2014-06-30 | Nippon Conlux Co Ltd | 紙葉類識別装置 |
JP2019045912A (ja) * | 2017-08-29 | 2019-03-22 | 株式会社ユニバーサルエンターテインメント | 紙幣識別装置及び遊技用装置 |
JP2019200447A (ja) * | 2018-05-14 | 2019-11-21 | 富士ゼロックス株式会社 | 同一性判定装置、同一性判定システムおよびプログラム |
JP7043967B2 (ja) | 2018-05-14 | 2022-03-30 | 富士フイルムビジネスイノベーション株式会社 | 同一性判定装置、同一性判定システムおよびプログラム |
Also Published As
Publication number | Publication date |
---|---|
US20130004054A1 (en) | 2013-01-03 |
US8433125B2 (en) | 2013-04-30 |
EP2000990A2 (en) | 2008-12-10 |
JP5314419B2 (ja) | 2013-10-16 |
CN101405772B (zh) | 2011-04-06 |
EP2000990A9 (en) | 2009-03-18 |
CN101405772A (zh) | 2009-04-08 |
EP2000990A4 (en) | 2009-07-22 |
US20090087077A1 (en) | 2009-04-02 |
JPWO2007108376A1 (ja) | 2009-08-06 |
US8260027B2 (en) | 2012-09-04 |
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