WO2010007658A1 - Dispositif d'identification de pièce de monnaie et procédé d'identification de pièce de monnaie - Google Patents

Dispositif d'identification de pièce de monnaie et procédé d'identification de pièce de monnaie Download PDF

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Publication number
WO2010007658A1
WO2010007658A1 PCT/JP2008/062719 JP2008062719W WO2010007658A1 WO 2010007658 A1 WO2010007658 A1 WO 2010007658A1 JP 2008062719 W JP2008062719 W JP 2008062719W WO 2010007658 A1 WO2010007658 A1 WO 2010007658A1
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Prior art keywords
coin
light emission
imaging device
light
camera
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PCT/JP2008/062719
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English (en)
Japanese (ja)
Inventor
直樹 岡
裕康 山口
秀和 田中
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グローリー株式会社
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Priority to PCT/JP2008/062719 priority Critical patent/WO2010007658A1/fr
Publication of WO2010007658A1 publication Critical patent/WO2010007658A1/fr

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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
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/005—Testing the surface pattern, e.g. relief

Definitions

  • the present invention relates to a coin discriminating apparatus and a coin discriminating method for identifying a coin denomination using a coin diameter and pattern obtained from a picked-up image of a coin conveyed to a coin passage.
  • the coin denomination is identified using the coin diameter and pattern obtained from the image image of the coin conveyed to the coin passage in order to determine whether the coin is true or false and whether it is a circulating coin or not.
  • a coin identifying device is known.
  • Patent Document 1 a magnetic sensor, a reflection sensor, and an image sensor are arranged in this order downstream on a coin conveyance path, and coins in the image sensor are selected according to the amount of reflected light obtained by the reflection sensor.
  • a technique for controlling the amount of light emitted during image capturing is disclosed.
  • Patent Document 2 the first and second illuminations with different light sources having different wavelengths are irradiated, and the reflected light of the first illumination and the reflected light of the second illumination are received.
  • a technique is disclosed in which a denomination of a coin is identified by taking an image signal and a second image signal and synthesizing the first and second images.
  • JP 2000-33111 A Japanese Patent Laid-Open No. 2005-31844
  • the reflection sensor in Patent Document 1 described above captures the total amount of reflected light emitted to the entire coin, and uses this reflected light to control the amount of illumination light of the image sensor.
  • the light quantity can be adjusted with respect to the old and new coins or the material, the light quantity cannot be adjusted with respect to the gently formed stamped portion.
  • Patent Document 1 is to feed back the difference in the amount of reflected light depending on the old and new coins or the material to the illumination of the image sensor, because the illumination is only irradiated from the same direction, and the amount of illumination is changed. In other words, it is not possible to illuminate the coins with the engraved part gently.
  • Patent Document 2 a first image having a high light intensity and a second image having a small light intensity are combined, and denomination identification is performed using the combined image.
  • both the first and second images can be obtained only with an image with a large amount of light so that the amount of illumination applied to the engraved part is insufficient or when saturation is caused.
  • only an image in which the stamped portion is dark or saturated can be obtained.
  • an image sensor suitable for collecting image images of Japanese coins is not necessarily suitable for collecting image images of coins of other countries.
  • the portrait of the back side used in EURO coins does not mean that one coin corresponds to one denomination on a one-to-one basis.
  • Each coin has a different shape depending on the EURO member country. Some coins are difficult to identify because they are crushed and the image cannot be taken.
  • An object of the present invention is to provide a coin identifying device and a coin identifying method capable of improving the accuracy of image discrimination.
  • the coin identification device identifies a coin denomination using a coin diameter and a pattern obtained from a captured image of a coin conveyed to a coin passage.
  • a first image pickup device that picks up an image of the surface of the coin, and a second image pickup device that is arranged on the downstream side of the coin passage with respect to the first image pickup device.
  • the second imaging device has a light source that emits light to the identified coin, and the light emission amount of the light source of the second imaging device according to the brightness of a predetermined portion of the image captured by the first imaging device.
  • a light emission control means for controlling the light emission.
  • the first imaging device that images the surface of the coin and the second imaging device that is arranged on the downstream side of the coin path with respect to the first imaging device are provided, and the light beam is applied to the identified coin.
  • a light source that emits light is arranged in the second imaging device, and the light emission amount of the light source of the second imaging device is controlled according to the brightness of a predetermined portion of the image captured by the first imaging device.
  • FIG. 1 is a diagram illustrating an arrangement example of a magnetic sensor and a camera in the coin identifying device according to the present embodiment.
  • FIG. 2 is a diagram for explaining the concept of a plurality of light source groups used in the coin identifying device according to the present embodiment.
  • FIG. 3 is a functional block diagram illustrating the configuration of the coin identifying device according to the present embodiment.
  • FIG. 4 is an explanatory diagram for explaining power supply to the LED group.
  • FIG. 5 is a diagram illustrating a structure example of the camera according to the present embodiment.
  • FIG. 6 is a diagram illustrating a configuration example of information stored in the first light emission amount table.
  • FIG. 7 is a diagram illustrating a configuration example of information stored in the second light emission amount table.
  • FIG. 1 is a diagram illustrating an arrangement example of a magnetic sensor and a camera in the coin identifying device according to the present embodiment.
  • FIG. 2 is a diagram for explaining the concept of a plurality of light source groups used in the coin identifying
  • FIG. 8 is an explanatory diagram for explaining the concept of correcting the light emission time when coins continuously enter.
  • FIG. 9 is a flowchart illustrating the procedure of the light emission control process according to the present embodiment.
  • FIG. 10 is an explanatory diagram for explaining a coin of the coin identifying device according to the present embodiment.
  • FIG. 11 is an explanatory diagram for explaining a modification of the present invention.
  • FIG. 1 is a diagram illustrating an arrangement example of a magnetic sensor and a camera in the coin identifying device according to the present embodiment.
  • This coin identification device 10 identifies the denomination of a coin using the diameter and pattern of the coin obtained from the captured image of the coin conveyed to the coin passage, and in particular, not only the coin of Japan but also other countries The coins are identified.
  • a first camera 100A that captures an image of one surface of the coin and a second camera 100B that is disposed on the downstream side of the coin path with respect to the first camera 100A are provided.
  • the first camera 100 ⁇ / b> A and the second camera 100 ⁇ / b> B are arranged on different transporting road surfaces and the respective coin surfaces are imaged, whereby both surfaces (front surface and back surface) of the coin are imaged.
  • the second camera is provided with a plurality of light source groups that emit light beams having different incident angles of the optical axis with respect to the identified coin, and then the coin identifying device 10 captures an image captured by the first camera 100A.
  • the light emission rate between the plurality of light source groups that emit light by the second camera 100B or the respective light emission amounts are controlled.
  • a plurality of light source groups that emit light beams having different incident angles of the optical axis with respect to the identified coins, that is, a high angle LED group and a low angle LED group are arranged.
  • Low angle LED groups are mainly used for illumination of existing cameras, and the reason why low angle LED groups are used in this way is that Japanese coins have a stamped edge (edge of the stamped portion). If illumination with a certain amount of light is supplied to the engraved portion, the engraved portion of the coin can be imaged clearly to some extent, and illumination that can clearly image the outer peripheral portion of the coin can be provided as shown in FIG. is there.
  • a high angle LED is provided so that sufficient illumination can be applied even when the engraved portion of the coin is gently formed.
  • a group is provided so that the coins can be illuminated from different directions.
  • first camera 100A and second camera 100B are provided, and the second camera 100B High is used by using a captured image of coins of the first camera 100A.
  • the light emission amount ratio between the angle LED group and the low angle LED group or each light emission amount is controlled.
  • a coin is imaged by the first camera 100 ⁇ / b> A based on the denomination obtained from the magnetic characteristics of the coin detected by the magnetic sensor 11, and imprinted using the density value of the captured image of the coin. If there is insufficient or insufficient illumination for the portion, and if the illumination for the stamped portion is insufficient, the ratio of the amount of light emitted from the high angle LED group is increased or the amount of emitted light is increased.
  • FIG. 3 is a functional block diagram illustrating the configuration of the coin identifying device according to the present embodiment.
  • the coin identification device 10 includes a magnetic sensor 11, a magnetic processing circuit 12, power supplies 13A and 13B, AD converters 14A and 14B, pulse generation circuits 15Aa and 15Ba, and a pulse generation circuit 15Ab.
  • 15Bb image processing circuits 17A and 17B, a first camera 100A, a second camera 100B, a storage unit 18, and a control unit 19.
  • a capital letter A is appended to the functional part related to the first camera 100A
  • a capital letter B is appended to the functional part related to the second camera 100B.
  • the function part related to the angle LED group is given a lowercase letter a after the capital letter
  • the function part related to the Low angle LED group is given a lowercase letter b after the uppercase letter. If there is no need for distinction, such letters will be omitted.
  • the magnetic sensor 11 detects the magnetic characteristics of the coins conveyed through the coin path
  • the magnetic processing circuit 12 is a circuit that amplifies and encodes the output signal output by the magnetic sensor 11.
  • the power supplies 13A and 13B supply power to the first camera 100A or the second camera 100B.
  • the power source 13A is connected to the first camera 100A, and the power source 13B is connected to the second camera 100B.
  • AD converters 14A and 14B are circuits that convert analog signals into digital signals. Specifically, the voltage previously applied to the anode to the high angle LED group 121 and the low angle LED group 122 described later is monitored, and the voltage value is notified to the control unit 19.
  • the AD converter 14A monitors the applied voltage value of the LED light source of the first camera 100A
  • the AD converter 14B monitors the applied voltage value of the LED light source of the second camera 100B.
  • the pulse generation circuits 15Aa, 15Ba, 16Ab, and 16Bb are circuits that supply a pulse signal to the LED drive transistor 113 in the camera 100 based on an instruction from the light emission control unit 19a.
  • the pulse generation circuits 15Aa and 15Ba perform switching of power supply to the high angle LED group 121Aa or 121Ba
  • the pulse generation circuits 16Ab and 16Bb perform switching of power supply to the low angle LED group 122Ab or 122Bb.
  • the LED driving transistor 113 that has received the pulse is switched to the ON state, and the current of the power source 13 is supplied to the High angle LED group 121 and the Low angle LED group 122.
  • the image processing circuits 17A and 17B are circuits that perform amplification and encoding of the output signal output by the imaging device 150A or 150B.
  • the image processing circuit 17A is connected to the imaging device 150A, and the image processing circuit 17B is connected to the imaging device 150B.
  • first camera 100A and the second camera 100B will be described. Note that the hardware configurations of the first camera 100A and the second camera 100B are the same, and therefore will be described together without being described separately.
  • the camera 100 has a camera substrate 110 and a camera LED substrate 120.
  • the camera substrate 110 includes a current limiting resistor 111 for preventing overload of the power supply 13, a charge storage capacitor 112 for storing charges, an LED drive transistor 113 for switching power supply, and a timing sensor 130.
  • the camera LED board 120 includes a high angle LED group 121 and a low angle LED group 122.
  • the power supply to the LED group will be described. As shown in FIG. 4, a substantially constant voltage is applied to the high angle LED group 121 and the low angle LED group 122 by the charge storage capacitor 112, and the LED drive transistor 113. Switches OFF unless a pulse signal is received from the pulse generation circuit 15 or 16, while switching to ON when the pulse signal is received from the pulse generation circuit 15 or 16 causes the high angle LED group 121 and / or Low to switch. Power is supplied to the angle LED group 122.
  • Timing sensor 130 is a sensor that detects that a coin has entered the imaging range on the conveyance path. Specifically, the light emitting element and the light receiving element are configured. When the conveyed coin reaches between the light emitting element and the light receiving element and the light irradiated from the light emitting element to the light receiving element is blocked, the light emission timing is controlled by the control unit. 19 is notified to the light emission control unit 19a.
  • the temperature sensor 140 is a sensor that detects the temperature, and notifies the light emission control unit 19a of the control unit 19 of the output signal. In general, when the temperature rises, the light emission efficiency of the LED decreases, so correction is performed.
  • the imaging device 150 is a device such as a CMOS (Complementary Metal Oxide Semiconductor) camera that reads density data in pixel units by imaging a coin. Specifically, as shown in FIG. 5, an image of a coin that has entered the imaging range by the lens 170 is formed on the light receiving plane of the imaging device, and illumination by the high angle LED group 121 and the low angle LED group 122 is performed. When the coin is irradiated, the reflected light of the coin is received through the image sensor, the reflected light is photoelectrically converted, and a digital signal is output to the control unit 19.
  • a CMOS camera is used, but other devices such as a CCD (Charge Coupled Devices) camera can also be used.
  • CCD Charge Coupled Devices
  • the high angle LED group 121 and the low angle LED group 122 are light source groups such as light emitting diodes that emit light. As shown in FIG. 5, the high angle LED 123 and the low angle LED 124 are in an annular shape facing the surface of the conveyance path. LEDs are arranged on the top.
  • the high angle LED 123 is arranged vertically downward, and a mirror 161 made of acrylic resin or the like is installed on the optical path, and the illumination light from the high angle LED 123 is reflected by the mirror 161. It is irradiated around the stamped part of the coin.
  • the low angle LED 124 is arranged vertically upward.
  • a mirror 162 is set on the optical path of the low angle LED 124, and the illumination light from the low angle LED 124 is reflected by the mirror 162 and irradiated around the outer peripheral portion.
  • the storage unit 18 is a storage device such as a non-volatile memory that stores data (for example, a reference coin image at the time of determination) necessary for various processes by the control unit 19 and a program, and is also used for the first camera 100A.
  • a first light emission amount table 18a that determines the optimum value of the light emission amount and a second light emission amount table 18b that determines the optimal value of the light emission amount for the second camera 100B are stored.
  • the first light emission amount table 18a stores the light emission amount of illumination at each angle for each denomination of coins.
  • the light emission time A1 in the high angle LED group 121 in the case of the denomination S, the light emission time A1 in the high angle LED group 121, the light emission time B1 in the low angle LED group 122, and in the case of the denomination T, the high angle LED group 121.
  • the light emission time A2 is set for the low angle LED group 122
  • the light emission time B2 is set for the low angle LED group 122, respectively.
  • the first light emission amount table 18a is set with light emission amounts using only the denominations of coins to be identified as search items.
  • an arithmetic average or a weighted average of the optimum value for the front and the optimum value for the back is stored.
  • the second light emission amount table 18b stores the light emission amount of the illumination at each angle for each denomination of coins, front and back, and the manufacturing country.
  • the denomination of the coin is the denomination S
  • the high angle LED group 121 emits light a1
  • the low angle LED group 122 emits light.
  • the light emission time a2 is set for the high angle LED group 121
  • the light emission time b2 is set for the low angle LED group 122.
  • the high angle LED group 121 includes a light emission time a3, a low angle LED group.
  • the light emission time b3 is set to 122
  • the high angle LED group 121 has a light emission time a4 and a low angle LED group 122.
  • the coin surface is the back side, the high angle LED group 121 has the light emission time a6 and the low angle LED group 122 has the light emission time b6.
  • the discrimination result of the coin image captured by the first camera 100A may be used. For this reason, at least the coin's country of manufacture is known when the captured image of the coin by the first camera 100A is the back side. For this reason, in the second light emission amount table 18b, the light emission amount is set with the denomination and front and back of the coin to be identified, or the coin denomination, front and back, and the country of manufacture as the search items.
  • the control unit 19 is a control unit that controls the coin identification device 10 as a whole, and includes a light emission control unit 19a and a determination unit 19b.
  • programs corresponding to these functional units are stored in a ROM or non-volatile memory (not shown), and these programs are loaded and executed on a CPU, MPU, etc. Each corresponding process will be executed.
  • the light emission control unit 19a is a processing unit that performs light emission control of the high angle LED group 121 and the low angle LED group 122 using the first light emission amount table 18a and the second light emission amount table 18b.
  • the situation when the LED emits light is not always a constant environment.
  • charging is performed by the charge storage capacitor 112A so as to keep the voltage constant, but when coins enter continuously, as shown in FIG.
  • the high-angle LED group 121Aa and the low-angle LED group 122Ab emit light continuously, there is a situation in which the battery is not sufficiently charged and must emit light in a state where the voltage is lower than the steady state.
  • the voltage is set to a steady state. It is difficult to cause the high angle LED group 121Aa and the low angle LED group 122Ab to emit light with the amount of light emitted at the time.
  • the temperatures of the high angle LED group 121Aa and the low angle LED group 122Ab are higher than the steady state temperature (appropriate temperature at which the LEDs are intermittently lit). In this case, the forward voltage drop of the LED is reduced, or the light emission efficiency of the LED is reduced.
  • the light emission controller 19a acquires the voltage value and the temperature in the vicinity of the ED from the AD converter 14A and the temperature sensor 140A, and corrects the light emission times A1 and B1.
  • the light quantity equation is basically a function of current x time in the case of an LED, but the LED light quantity decreases as the temperature rises.
  • the light quantity is C
  • the light emission time is T
  • the minus first-order coefficient ⁇ is ⁇
  • the zero-order coefficient is ⁇
  • the temperature coefficient is approximately expressed by a linear expression
  • a suitable light amount is C (x)
  • a suitable light emission time is T (x, y, z)
  • the current area and the light emission amount are controlled to be constant as shown in FIG. 8 by correcting the light emission time according to the voltage value and temperature of the high angle LED group 121 and the low angle LED group 122. For example, even when an obstructing factor that makes it difficult to obtain a predetermined amount of emitted light, such as continuous entry of coins, can be obtained, it is possible to obtain illumination light with a suitable amount of emitted light when capturing a coin image.
  • the CPU of the control unit 19 not only acquires the voltage value acquired from the AD converter 14A and the temperature acquired from the temperature sensor 140A, but also the first captured image. Is used to correct the light emission time read from the second light emission amount table 18b.
  • the light emission amount read from the second light emission amount table 18b can be obtained by multiplying the light emission amount by B (x, w, v) ⁇ A. Good.
  • B (x, w, v) x is a denomination
  • w is a coin face
  • v is a manufacturing country.
  • the discriminating unit 19b is a processing unit that discriminates the denomination and authenticity of the coin based on the coin image captured by the camera 100 and the reference coin image stored in the storage unit 18. Specifically, when the first captured image captured by the first camera 100A is determined, the coin front / back determination and denomination determination are performed, and if the result is the back of the coin, Further country determination is performed. Further, when determining the second captured image captured by the second camera 100B, the country determination is performed if the second captured image is the back side of the coin, and the country determination is already performed if the second captured image is the front surface. Therefore, the denomination and authenticity of the coin are finally discriminated as they are.
  • FIG. 9 is a flowchart illustrating the procedure of the light emission control process according to the present embodiment.
  • step S901 when receiving magnetic data (magnetic characteristics) of coins from the magnetic sensor 11 via the magnetic processing circuit 12 (step S901), the light emission control unit 19a performs denomination based on magnetism (step S901).
  • step S902 the light emission times of the high angle LED group 121Aa and the low angle LED group 122 corresponding to the denomination obtained as a result of the determination are read from the first light emission amount table 19a (step S903).
  • step S904 the light emission control unit 19a reads the voltage value from the AD converter 14A and reads the temperature from the temperature sensor 140A (step S904). S905 and step S906).
  • the light emission control unit 19a calculates (corrects) the light emission times of the high angle LED group 121Aa and the low angle LED group 122 based on these voltage values and temperatures (step S907). That is, the corrected light emission time is calculated using the above equation (1).
  • the light emission control unit 19a transmits the corrected light emission time to each of the pulse generation circuits 15Aa and 16Ab to set the light emission time (step S908).
  • the pulse generation circuits 15Aa and 16Ab in which the light emission time is set turn on the high angle LED group 121Aa and the low angle LED group 122Ab for the light emission time after correction, and the imaging device 150A detects the coins as each LED group is turned on. Image.
  • the light emission control unit 19a acquires the first captured image captured by the imaging device 150A (step S909), acquires the average density value of the first captured image (step S910), and the determination unit 19b. Performs the coin type determination and front / back determination (coin surface determination) of the coin using the first captured image (step S911). If the first captured image is the back side, country determination is further performed.
  • the light emission control unit 19a includes the high-angle LED group 121Ba and the low-angle LED corresponding to the coin type that has already been identified, and the front and back of the coin (the manufacturing country if the first captured image is the back).
  • the light emission time of the group 122Bb is read from the second light emission amount table 18b (step S912).
  • the light emission control unit 19a reads a voltage value from the AD converter 14B and reads a temperature from the temperature sensor 140B (step S913). S914 and step S915).
  • the light emission control unit 19a calculates (corrects) the light emission times of the high angle LED group 121Ba and the low angle LED group 122Bb based on the voltage value, temperature, and average density value of the first captured image (step S916). . That is, the corrected light emission time is calculated using the above equation (2).
  • the light emission control unit 19a transmits the corrected light emission time to each of the pulse generation circuits 15Aa and 16Ab to set the light emission time (step S917).
  • the pulse generation circuits 15Ba and 16Bb for which the light emission time has been set turn on the high angle LED group 121Ba and the low angle LED group 122Bb for the light emission time after correction, and the imaging device 150B Image.
  • the light emission control unit 19a acquires a second captured image captured by the imaging device 150B (step S918), and the determination unit 19b uses the second captured image to perform a comprehensive coin determination (final determination).
  • the denomination is determined (step S919), and the process is terminated. If the second captured image is the back side, the overall determination is performed after the country determination.
  • the first camera 100A and the second camera 100B that image the surface of the coin are provided, and a high angle LED group that emits light beams having different incident angles of the optical axis with respect to the identified coin.
  • the 121Ba and Low angle LED groups 122Bb are arranged in the second camera 100A, and the High angle LED groups 121Ba and Low angle LEDs in the second camera 100B according to the brightness of a predetermined portion of the image captured by the first camera 100A. Since it is configured to control the light emission amount of the group 122Bb, it is possible to obtain a coin image in which the characteristics of the coined portion of the coin are reflected. As a result, it is possible to improve the accuracy of coin outer diameter detection and image discrimination. Become.
  • the image of the upper left Japanese coin in the figure is a case where the image is taken using only the Low angle LED group as illumination (similar to the existing technology).
  • the image of the Japanese coin on the lower left side in the figure is taken when the high angle and the low angle LED groups are used as illumination, and the image of the euro coin on the upper right side in the figure is a low angle LED.
  • This is a case where only the group is used for illumination (similar to the existing technology), and the image of the euro coin on the lower right side in the figure is taken using the LED group of High angle and Low angle as illumination. Is the case.
  • the High angle and The image picked up using both the low angle LED group can obtain a clear image in both the outer peripheral portion and the stamped portion of the coin, and in particular, in the case of the euro coin, it appears more prominently. I understand that.
  • the first camera 100A and the second camera 100B are configured such that the first camera 100A images one side of the coin and the second camera 100B images the other side of the coin. Since each is arranged, a captured image of the back side of the coin can be obtained at least once, and the non-execution of the determination of the manufacturing country can be prevented.
  • the Low angle LED group 122 is arranged in an annular shape so that the incident angle formed by the coin surface and the optical axis of the light beam becomes the first incident angle (Low angle). Since the high angle LED group 121 is arranged in an annular shape so as to have an incident angle (high angle), it is possible to effectively illuminate the outer peripheral portion and the stamped portion of the coin.
  • the current supplied to the light source or the current is limited by changing the light emission time of the high angle LED group 121Aa and the low angle LED group 122Ab, or the high angle LED group 121Ba and the low angle LED group 122Bb. It is possible to adjust the amount of light emission by improving the simple software configuration without changing the resistance to be changed.
  • the second camera 100B is obtained based on the denomination determination result of the magnetic characteristic of the coin and the acquired magnetic characteristic and the first captured image captured by the first camera 100A. Since the light emission amount of the light source is controlled, the light source can be made to emit light with a light amount suitable for the denomination characteristic of the coin.
  • the high light angle LED group 121Ba or the low angle LED group 122Bb is set by setting the light emission amount ratio of one of the LED groups to zero. You may make it selectively light-emit.
  • the magnetic characteristics of the coins are acquired, and the high angle LED group 121Aa and the low angle LED group 122Ab emit light according to the acquired magnetic characteristics of the coin and the front and back information obtained from the first captured image. Since the amount is controlled, it is possible to illuminate with a sufficient amount of light from the light source corresponding to the stamped portion even when the stamped portion of the coin is gently formed.
  • coin surface information (coin pattern), image diameter information (diameter size), color information (color The light emission amount of the high angle LED group 121Aa and the low angle LED group 122Ab may be controlled using the This information is used to specify the denomination.
  • the first camera 100A and the second camera 100B are configured to image different surfaces of the coin, and as a result, both surfaces of the coin are imaged, but it is not always necessary to image both surfaces.
  • the first camera 100A and the second camera 100B are arranged on the same plane as the coin surface, according to the brightness of the annular portion and the inner circular portion indicated by the luminance histogram of the first captured image.
  • the light emission amount of the High angle LED group 121Ba and the Low angle LED group 122Bb in the second camera 100B is controlled.
  • a table such as (3) shown in FIG. 11 is prepared, and the light emission amount is changed according to the current integrated value of each denomination area.
  • the central accumulated value is 50 when the transport coin is a 10-yen coin
  • the core light emitting unit is brightened to 160
  • the central accumulated value is 200.
  • the core light emitting unit is darkened to 130.
  • the first camera 100A and the second camera 100B are arranged on the same plane as the coin surface, since the imaging target of the first captured image and the second captured image is the same, the light emission is performed.
  • the amount of feedback can be performed more strictly, and it becomes possible to constantly supply illumination with an optimum light amount to the identified coin.

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Abstract

L'invention porte sur un dispositif d'identification de pièce de monnaie (10), qui comporte une première caméra (100A) pour réaliser une image d'une surface d'une pièce de monnaie et une seconde caméra (100B) disposée sur le côté aval de la première caméra (100A) dans un trajet de pièce de monnaie. La première caméra (100A) et la seconde caméra (100B) sont disposées sur des surfaces de trajet de transport différentes afin de réaliser des images des surfaces respectives de la pièce de monnaie pour réaliser des images des deux surfaces (la surface avant et la surface arrière) de la pièce de monnaie. La seconde caméra (100B) comporte un groupe de diodes électroluminescentes à angle élevé (121) et un groupe de diodes électroluminescentes à angle faible (122) qui émettent des faisceaux de lumière dont les axes optiques ont des angles d'incidence différents par rapport à la pièce de monnaie devant être identifiée. Le dispositif d'identification de pièce de monnaie (10) commande les quantités d'émission de lumière de groupes respectifs de sources de lumière émises par la seconde caméra (100B) en fonction de la luminosité au niveau de la partie prédéterminée d'une image capturée par la première caméra (100A).
PCT/JP2008/062719 2008-07-14 2008-07-14 Dispositif d'identification de pièce de monnaie et procédé d'identification de pièce de monnaie WO2010007658A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/062719 WO2010007658A1 (fr) 2008-07-14 2008-07-14 Dispositif d'identification de pièce de monnaie et procédé d'identification de pièce de monnaie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/062719 WO2010007658A1 (fr) 2008-07-14 2008-07-14 Dispositif d'identification de pièce de monnaie et procédé d'identification de pièce de monnaie

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WO2010007658A1 true WO2010007658A1 (fr) 2010-01-21

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0836661A (ja) * 1994-05-19 1996-02-06 Laurel Bank Mach Co Ltd 硬貨判別装置
JPH09305768A (ja) * 1996-05-21 1997-11-28 Fuji Electric Co Ltd 画像パターン識別装置
JP2000331211A (ja) * 1999-05-24 2000-11-30 Laurel Bank Mach Co Ltd 硬貨判別装置
JP2001052231A (ja) * 1999-08-17 2001-02-23 Laurel Bank Mach Co Ltd 硬貨判別装置
JP2002008089A (ja) * 2000-06-22 2002-01-11 Sankyo Seiki Mfg Co Ltd 反射光学素子の認識装置
JP2004227366A (ja) * 2003-01-24 2004-08-12 Sankyo Seiki Mfg Co Ltd コインの識別装置および識別方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0836661A (ja) * 1994-05-19 1996-02-06 Laurel Bank Mach Co Ltd 硬貨判別装置
JPH09305768A (ja) * 1996-05-21 1997-11-28 Fuji Electric Co Ltd 画像パターン識別装置
JP2000331211A (ja) * 1999-05-24 2000-11-30 Laurel Bank Mach Co Ltd 硬貨判別装置
JP2001052231A (ja) * 1999-08-17 2001-02-23 Laurel Bank Mach Co Ltd 硬貨判別装置
JP2002008089A (ja) * 2000-06-22 2002-01-11 Sankyo Seiki Mfg Co Ltd 反射光学素子の認識装置
JP2004227366A (ja) * 2003-01-24 2004-08-12 Sankyo Seiki Mfg Co Ltd コインの識別装置および識別方法

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