WO2017168592A1 - Dispositif de traitement de document de valeur et procédé de traitement de document de valeur - Google Patents

Dispositif de traitement de document de valeur et procédé de traitement de document de valeur Download PDF

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Publication number
WO2017168592A1
WO2017168592A1 PCT/JP2016/060248 JP2016060248W WO2017168592A1 WO 2017168592 A1 WO2017168592 A1 WO 2017168592A1 JP 2016060248 W JP2016060248 W JP 2016060248W WO 2017168592 A1 WO2017168592 A1 WO 2017168592A1
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WO
WIPO (PCT)
Prior art keywords
missing
valuable document
magnetic
information
thread
Prior art date
Application number
PCT/JP2016/060248
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English (en)
Japanese (ja)
Inventor
良 池本
秀行 是常
邦広 漁
Original Assignee
グローリー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by グローリー株式会社 filed Critical グローリー株式会社
Priority to PCT/JP2016/060248 priority Critical patent/WO2017168592A1/fr
Priority to CN201680080153.9A priority patent/CN108604397B/zh
Publication of WO2017168592A1 publication Critical patent/WO2017168592A1/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
    • 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
    • G07D7/004—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 digital security elements, e.g. information coded on a magnetic thread or strip
    • 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
    • G07D7/181—Testing mechanical properties or condition, e.g. wear or tear
    • G07D7/187—Detecting defacement or contamination, e.g. dirt
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching

Definitions

  • the present invention relates to a valuable document processing apparatus and a valuable document processing method. More particularly, the present invention relates to a valuable document processing apparatus and a valuable document processing method for processing a valuable document (value documents) provided with a security thread.
  • a security thread is provided.
  • the security thread is generally a thin strip made of metal or resin, and is provided by being affixed to a base material or inserted.
  • a plurality of security threads may be provided as in the 100-yuan banknote of the People's Republic of China issued in 2015.
  • a plurality of features are given to the security thread. For example, magnetic information may be applied to the security thread, or an optical variable element (OVD) such as a reflective layer, a hologram, or a motion thread that reflects a specific color may be applied to the surface of the security thread.
  • ODD optical variable element
  • Patent Document 1 a hologram or diffraction grating is provided on one surface of a base material, and a magnetic layer mainly composed of a magnetic material is provided on the other surface.
  • the provided security thread is described.
  • a function capable of recording magnetic information is added to a security thread having an optical function such as a hologram, and the optical information possessed by the hologram or the like is recorded in the security thread as magnetic information.
  • the authenticity determination is performed by comparing the optical information and the magnetic information, thereby making it more difficult to forge the security thread.
  • Patent Document 2 describes that an image of a thread portion is checked with a light transmission sensor and a magnetic sensor in order to correctly detect the presence of the thread (see FIG. 7).
  • Japanese Patent Application Laid-Open No. 2004-228561 describes that the abnormal conveyance content and the degree of damage of a paper sheet are determined based on a read signal of a security thread.
  • JP 2011-123722 A International Publication No. 2004/023402 Japanese Unexamined Patent Publication No. 9-44722
  • Banknotes collected by the bank from the city are judged to be genuine in the authenticity judgment because there are various types of damage such as tearing, holes, dirt, wrinkles, graffiti, tape sticking, etc. Of these, only those that are determined to be undamaged by the damage determination are used again. On the other hand, if it is determined as a non-defective ticket in the correct / injured determination, the correct note is separated so that it is not used again. At this time, it is required to process a banknote with a damaged security thread as a damaged ticket. There are various criteria for the damage of the security thread, but banknotes with the security thread missing more than the reference are collected as a slip.
  • Examples of the sensor that can be used for detecting the security thread include an image sensor, a magnetic sensor, and a capacitance sensor. Although these sensors have the performance required for authenticity determination, they cannot detect partial omissions (for example, a portion where a security thread is missing 10 mm) with sufficient accuracy, and correct the correct and non-performing bills. It was difficult to identify. If the correct ticket is misjudged as a non-performing bill, the banknote that can be used originally will be discarded, and if the non-performing ticket is misdetermined as a genuine note, the banknote that should be discarded is distributed in the city. Therefore, it is required to prevent any erroneous determination.
  • a sensor having a shallow depth of field such as CIS (Contact Image Sensor) is often used, and the banknote deviates from the focused area due to flapping or the like, resulting in an unclear image.
  • the image of the security thread is blurred and thinned, and may be mistaken as a missing part, or conversely, the missing part may be mistakenly connected.
  • the security thread detection by the image sensor is accurate enough to use a true / false judgment to determine the presence or absence of a security thread, but the precision is insufficient to detect partial omissions for judgment of damage. there were.
  • the resolution in the bill conveyance direction is sufficiently accurate to detect a partial loss of the security thread, but it may not be possible to distinguish between the partial loss of the security thread and a simple decrease in magnetic output. Since the decrease in magnetic output has no problem in authenticity determination or appearance, it can be used as a genuine ticket and must be distinguished from partial omission.
  • the electrostatic capacity sensor detects the entire security thread, and cannot detect a partial omission in principle.
  • Patent Documents 1 and 2 only detect a security thread for authenticity determination
  • Patent Document 3 discloses a method for improving the security thread detection accuracy. It did not provide the above technical means.
  • the present invention has been made in view of the above-described situation, and an object thereof is to provide a valuable document processing apparatus and a valuable document processing method capable of detecting a partial omission of a security thread with higher accuracy.
  • the present invention is a valuable document processing apparatus for detecting a partial omission of a security thread of a valuable document, the image information of the valuable document being conveyed on a conveyance path. And detecting the partial omission based on the image information and the magnetic information, the magnetic sensor detecting the magnetic information of at least the security thread of the valuable document conveyed on the conveyance path, and the image information and the magnetic information. And a missing detection unit.
  • the present invention is characterized in that, in the above-mentioned invention, further, a true / false determining unit for determining authenticity of the valuable document is provided.
  • the present invention is characterized in that in the above invention, a partial omission of a security thread of a valuable document determined to be a genuine note is detected.
  • the present invention is the above invention, wherein the missing detection unit is based on the optical detection result of the partial missing based on the image information and the magnetic detection result of the partial missing based on the magnetic information, The partial omission is detected.
  • the present invention is such that, in the above invention, the missing detection unit determines the magnetic detection result of the partial missing when the optical detection result of the partial missing is determined to be missing. It is characterized by that.
  • the present invention is the above invention, wherein the optical detection result is an image of the security thread image information included in the image information of the valuable document, and the magnetic detection result is The magnetic information of the security thread is imaged, and the missing detection unit detects the partial missing based on a superimposed image of the imaged information of the security thread and the magnetic information of the security thread. It is a thing to do.
  • the present invention is the above invention, wherein the missing detection unit, the optical detection result of the partial missing is not missing, and the magnetic detection result of the partial missing is not missing, It is determined that the non-defective product has no partial omission.
  • the present invention is the above invention, wherein the missing detection unit, the optical detection result of the partial missing is missing, and the magnetic detection result of the partial missing is not missing, It is determined that the non-defective product has no partial omission.
  • the present invention is the above invention, wherein the missing detection unit, when the optical detection result of the partial missing is not missing, and when the magnetic detection result of the partial missing is missing, It is determined that the non-defective product has no partial omission.
  • the present invention is the above invention, wherein the missing detection unit detects a position of the security thread in the valuable document from an information pattern included in the image information, and based on the detected position of the security thread, It is characterized by detecting partial omissions.
  • the image information includes a transmitted light image generated from an intensity distribution of light transmitted through the valuable document.
  • the invention includes a reflected light image generated from an intensity distribution of light reflected by the valuable document.
  • the valuable document is a bill
  • the valuable document processing device is a bill processing device
  • the present invention is the above invention, wherein a branching mechanism that is provided in the transport path and switches a transport destination of the valuable document, a plurality of stacking units that are connected to the transport path and stack the valuable document, and the omission
  • a transport control unit that selects a specific stacking unit as a transport destination of the valuable document from the plurality of stacking units according to a determination result of the detection unit, and drives the branch mechanism;
  • the present invention also relates to a valuable document processing method for detecting a partial loss of a security thread of a valuable document, the image information obtaining step for obtaining image information of the valuable document conveyed on a conveyance path, and the conveyance path
  • a magnetic information acquisition step for acquiring at least magnetic information of the security thread from the valuable document conveyed, and a missing detection step for detecting the partial loss based on the image information and the magnetic information. It is characterized by.
  • the accuracy of detecting a partial omission of a security thread having magnetic information is improved.
  • FIG. 1 It is a schematic diagram explaining the structure of the sensor unit 10 of a banknote processing apparatus, (a) is a side view, (b) is the top view which looked at the conveyance surface of (a) in the arrow direction.
  • 2 is a schematic diagram illustrating a configuration of an image sensor module 15.
  • FIG. It is a schematic diagram explaining the front and back and the pattern of direction of the banknote 100 conveyed.
  • 3 is a schematic diagram illustrating a configuration of a magnetic sensor module 19.
  • FIG. 3 is a schematic diagram illustrating an example of a pattern of a security thread 101.
  • FIG. It is a figure explaining the magnetic information acquired when the security thread
  • (a) represents the output of the magnetic sensor module 19, (b) imaged the output of (a).
  • (C) represents a sled magnetic image obtained by comparing the block image of (b) with a threshold value. It is a figure for demonstrating the relationship between the acquired magnetic information and image information, and the missing detection of the security thread
  • FIG. It is a judgment table of damage judgment in the case of detecting a missing security thread 101 using both optical judgment and magnetic judgment results. It is a determination flow for determining whether or not the security thread 101 is missing by using both the optical determination and the magnetic determination results.
  • FIG. 1 It is a functional block diagram explaining the processing system in the identification unit 50 of the banknote processing apparatus which concerns on embodiment of this invention. It is a flowchart which shows an example of the processing flow of the missing detection part 25d.
  • A is the perspective schematic diagram which showed the external appearance of the banknote processing apparatus which concerns on embodiment of this invention
  • (b) is the cross-sectional schematic which showed the structure outline
  • FIG. It is the isometric view schematic diagram which showed the external appearance of another banknote processing apparatus which concerns on embodiment of this invention.
  • a banknote processing apparatus is shown as an example of a valuable document processing apparatus.
  • the sensor unit 10 has a configuration in which a photosensor 13 a, an image sensor module 15, a thickness detection sensor 17, a magnetic sensor module 19, and a photosensor 13 b are arranged along the conveyance path of the banknote 100.
  • the image sensor module 15, the thickness detection sensor 17, and the magnetic sensor module 19 are sufficiently long with respect to the width W of the conveyance path and can detect the entire surface of the banknote 100.
  • the sensor unit 10 is provided with a transport mechanism 11 so that the bill 100 can move in the transport path.
  • the transport mechanism 11 is not particularly limited, and for example, a mechanism that drives a roller, a belt, or the like with a driving device such as a motor is used.
  • a rotation amount detection unit (not shown) such as a rotary encoder is connected to the transport mechanism 11, and the distance that the bill 100 is transported can be detected from the detected rotation amount.
  • the image information of the bill 100 is acquired by the image sensor module 15, and the magnetic information of the bill 100 is acquired by the magnetic sensor module 19.
  • a partial omission hereinafter also simply referred to as “missing” 101 of a security thread (hereinafter also simply referred to as “thread”) 101 provided on the banknote 100 is detected. Details of the missing detection method will be described later.
  • the type of bill 100 used is not particularly limited as long as it includes a thread 101 having magnetic information.
  • the material of the banknote 100 may be paper made of plant fibers, synthetic paper made of synthetic fibers, or a polymer sheet that is a synthetic resin sheet.
  • the thread 101 only needs to have magnetic information.
  • FIG. 1 one thread 101 extending along the short direction of the banknote 100 is shown, but a plurality of threads 101 may be provided in the banknote 100.
  • sled 101, for example like the barcode is used suitably.
  • the position and shape of the thread 101 are not particularly limited.
  • the thread 101 may be exposed on the surface of the banknote 100 or may be provided inside the banknote 100.
  • the material of the banknote 100 is paper or synthetic paper
  • the thread 101 may be rolled into the banknote 100. In this case, the thread 101 cannot be seen from the surface of the banknote 100 or is exposed intermittently, but can be confirmed by making the banknote 100 transparent to light.
  • the thread 101 may be provided with a reflective layer that reflects a specific color, or an optical variable element (OVD) such as a hologram or a motion thread.
  • ODD optical variable element
  • the photo sensor 13a detects the banknotes 100 sequentially conveyed to the sensor unit 10 and generates a banknote detection signal for determining the detection start timing of the banknotes 100 in the sensor unit 10.
  • the photosensor 13b detects that the banknote 100 has passed.
  • the photosensor 13b detects the arrival of the banknote 100
  • the photosensor 13a detects the passage of the banknote 100.
  • the photosensors 13a and 13b light reflection type or light transmission type optical sensors are used. Instead of the photosensors 13a and 13b, a sensor that mechanically detects the passage of the banknote 100 may be provided.
  • the image sensor module 15 includes, for example, an image sensor in which imaging elements such as a CCD and a CMOS are arranged in a line, and an imaging optical system such as a light source and a lens.
  • the image sensor module 15 detects image information of the banknote 100 conveyed on the conveyance path.
  • the format of the image information may be an imaged or a combination of non-imaged coordinates and measurement values, but in the following, the case of processing the imaged image information explain.
  • As the image information at least one of a transmitted light image generated from the intensity distribution of light transmitted through the banknote 100 and a reflected light image generated from the intensity distribution of light reflected by the banknote 100 can be used. .
  • the reflected light image at least one of a surface reflected light image based on light reflected on the surface of the banknote 100 and a back surface reflected light image based on light reflected on the back surface of the banknote 100 can be used.
  • a transmitted light image is preferably used.
  • a reflected light image may be used.
  • the wavelength of light used for acquisition (imaging) of image information is appropriately selected according to the banknote 100 to be imaged, for example, monochromatic light such as red, green, and blue, visible light such as white light, Infrared light, ultraviolet light, or the like can be used, and if necessary, imaging may be performed a plurality of times using light of a plurality of different spectra. For each of the front surface reflected light image, the back surface reflected light image, and the transmitted light image, a plurality of images captured with light of different spectra may be included. Infrared light is suitable for imaging the sled 101, and when detecting the sled 101 provided inside the banknote 100, it is preferable to use a transmitted infrared light image.
  • the image sensor module 15 shown in FIG. 2 includes a first light receiving unit 15a, a light emitting unit 15b, and a second light receiving unit 15c.
  • first light receiving unit 15a light is emitted from the light sources 15d and 15e toward the banknote 100, and the reflected light reflected by the banknote 100 is received by the imaging element 15g via the condenser lens 15f.
  • a transparent plate 15i is provided in the lower part facing the conveyance path of the first light receiving unit 15a.
  • substrate 15h which supports the some image pick-up element 15g arranged in the line form in the direction orthogonal to the conveyance direction of the banknote 100 is provided in the upper part of the 1st light reception unit 15a. According to the 1st light reception unit 15a, the reflected light image of the upper surface of the banknote 100 is obtained.
  • the light emitting unit 15b is provided at a position facing the first light receiving unit 15a across the conveyance path of the banknote 100.
  • the light transmitted through the banknote 100 enters the light receiving unit 15a and is received by the imaging element 15g via the condenser lens 15f.
  • a transparent plate 15k is provided on the upper portion of the light emitting unit 15b facing the conveyance path.
  • the second light receiving unit 15c is provided adjacent to the light emitting unit 15b.
  • the second light receiving unit 15c light is emitted from the light sources 15m and 15n toward the banknote 100, and the reflected light reflected by the banknote 100 is received by the imaging element 15q via the condenser lens 15p.
  • a transparent plate 15s is provided on the upper portion of the second light receiving unit 15c facing the conveyance path.
  • substrate 15r which supports the some image pick-up element 15q arranged in the line form in the direction orthogonal to the conveyance direction of the banknote 100 is provided in the lower part of the 2nd light reception unit 15c. According to the second light receiving unit 15c, a reflected light image of the lower surface of the banknote 100 is obtained.
  • the front and back and the direction of the bill 100 to be conveyed are not particularly limited, and the upper surface of the bill 100 may be in any of the states shown in FIGS.
  • the denomination, front, back, and orientation of the banknote 100 are determined by the image information obtained by the image sensor module 15, and the process of detecting the lack of the thread 101 is performed according to the denomination and direction of the banknote 100.
  • the thickness detection sensor 17 detects the thickness of the banknote 100. As thickness detection sensor 17, what detects the amount of displacement at the time of bill 100 passage in the roller which opposes across a conveyance way is mentioned by the sensor provided in each roller, for example.
  • the magnetic sensor module 19 is used for detection of magnetic information included in the banknote 100 conveyed on the conveyance path, and detects at least magnetic information included in the thread 101.
  • the magnetic sensor module 19 may detect not only the magnetic information of the thread 101 but also other magnetic information such as magnetic ink printed on the banknote 100.
  • the magnetic sensor module 19 is preferably a magnetic sensor in which a plurality of magnetic detection elements (magnetic heads) are arranged in a line.
  • an element (differential magnetic detection element) that outputs a change in magnetic flux density of the sled 101 as a signal fluctuation is preferably used.
  • MR element magnetoresistive element
  • FG element flux A gate
  • MI element magnetic impedance
  • the type of the magnetoresistive element may be an anisotropic magnetoresistive element (AMR element), a giant magnetoresistive element (GMR element), a tunnel magnetoresistive element (TMR element), or the like.
  • the magnetic detection element may output the strength (absolute value) of the magnetic flux density of the thread 101, and for example, a Hall element may be used.
  • a magnet 19b for generating a bias magnetic field and a magnetic detection element 19c are arranged in a magnetic head 19a.
  • the magnetic detection elements 19 c are arranged in a line in a direction orthogonal to the conveyance direction of the banknote 100.
  • a bristle roller 19d having a bristle material provided on the outer peripheral surface is disposed so that the banknote 100 can be brought into close contact with the magnetic head 19a.
  • the magnetic sensor module 19 it is possible to obtain high-resolution detection performance for the pattern of the thread 101.
  • the magnetic information of the thread 101 is detected with a resolution of 50 to 100 dpi in the length direction of the thread 101.
  • the resolution of the magnetic sensor module 19 is not limited to the above resolution, and can be determined according to the magnetic pattern of the thread 101 to be detected.
  • FIG. 5 shows an example of the thread 101 pattern.
  • the thread 101 shown in FIG. 5 has magnet portions 101a each having a width of 5 mm and a length of 5 mm arranged at intervals of 5 mm. Note that the entire thread 101 may be formed of a magnetic material or only the magnetized portion 101a of the thread 101 may be formed of a magnetic material. Missing 101 can be detected.
  • the length direction of the thread 101 is generally parallel to the short direction of the banknote 100.
  • the direction in which the magnetic sensor module 19 detects the magnetic information of the thread 101 is the Y direction in FIG. 5 in the case of short conveyance in which the bill 100 is conveyed in the short direction, and the bill 100 is in the longitudinal direction.
  • the direction is the X direction in FIG.
  • a method for detecting missing of the thread 101 in the case of short conveyance will be described. As will be described later, it is possible to detect the absence of the thread 101 even in the case of longitudinal conveyance. Even if the length direction of the thread 101 is parallel to the longitudinal direction of the banknote 100, the processing can be performed in the same manner as in the following example according to the length direction of the thread 101.
  • FIG. 6 is a diagram illustrating the magnetic information of the thread 101 output from the magnetic detection element 19c.
  • FIG. 6A corresponds to the case where the change amount of the magnetic flux density is output (for example, magnetoresistive element).
  • the vertical axis represents the output voltage Vout
  • the horizontal axis represents the movement amount L of the magnetic head 19a.
  • FIG. 7 is a diagram for explaining magnetic information output when a normal thread 101 is detected.
  • FIG. 7A shows magnetic information obtained by the magnetic detection element 19c that outputs the amount of change in magnetic flux density.
  • (B) represents magnetic information obtained by the magnetic detection element 19c that outputs the absolute value of the magnetic flux density
  • (c) is obtained by processing the magnetic information obtained in (a) or (b). Represents magnetic information.
  • a predetermined interval P is obtained.
  • a signal with output is obtained.
  • the magnetic information may be converted by processing with software after A / D conversion (digitization).
  • FIG. 8 is a diagram showing an image of the output of the magnetic sensor module 19 as an example of the magnetic information acquired when the normal thread 101 is detected.
  • the magnetic information is not limited to images, but may be other formats such as numerical values.
  • the magnetic sensor module 19 detects a change in the magnetic flux density of the sled 101 shown in FIG. 5 as magnetic information, an output as shown in FIG. 8A is detected.
  • this output is A / D converted so that the numerical value increases as the downward output increases, and an image having the converted value as a pixel value is created, a magnetic image obtained by imaging the magnetic information of the thread 101 is formed.
  • FIG. 8 is a diagram showing an image of the output of the magnetic sensor module 19 as an example of the magnetic information acquired when the normal thread 101 is detected.
  • the magnetic information is not limited to images, but may be other formats such as numerical values.
  • FIG. 8B is a block image obtained by dividing the magnetic image into blocks each having a predetermined interval of 5 mm in the length direction of the thread 101, and setting the maximum pixel value in each block as the pixel value of each block. is there.
  • FIG. 8C is a sled magnetic image in which the pixel value of each block is compared with a predetermined threshold value, and a block with a change in magnetic flux density is expressed in black and a block without the change is expressed in white. In this way, it can be detected that the magnetized portion 101a of the magnetic thread is present at a predetermined position at a predetermined interval of 5 mm in this example.
  • FIGS. 9A to 9C show an example of magnetic information acquired when the missing thread 101 is detected, as in FIG. The thread missing portion detected in FIG. 9A is represented in white in the thread magnetic image of FIG. 9C.
  • These thread magnetic images represent whether or not the thread 101 is missing, and can be used as magnetic information in the thread 101 missing detection process described below.
  • the position of the block image and the width of the thread 101 in the width direction are determined so that the thread 101 is included. Further, if the process of removing the output at a position different from the predetermined interval is performed before the above-described block image is created, the lack of the magnetized portion 101a of the thread 101 can be detected more accurately.
  • the interval between the downward extreme values in FIGS. 8A and 9A of the output of the magnetic sensor module 19 is obtained, and when there is no extreme value at a predetermined interval, the thread 101 is missing at that position. It may be.
  • the lack of the thread 101 is detected in combination with the image information as described later, the lack of the thread 101 is not detected in the entire area of the thread 101, but based on the position where the thread 101 is determined to be missing from the image information. Thus, it is possible to detect a partial loss.
  • the thread 101 is at that position.
  • the predetermined length is based on, for example, a length based on a predetermined interval such as 5 mm or more in the length direction of the thread 101 with respect to a predetermined interval of 5 mm, or a length of a defect detected from optical information. Length can be used. In any case, if there is a position where a change in magnetic flux density is not detected among predetermined positions where a change in magnetic flux density is to be detected, it is determined that the thread 101 is missing at that position.
  • the lack of the thread 101 provided on the banknote 100 is detected by comparing the acquired magnetic information and image information.
  • the relationship between the acquired magnetic information and image information and detection of the missing of the thread 101 will be described with reference to FIGS.
  • the missing portion of the thread 101 is indicated by a dotted line.
  • the transmitted infrared light image is binarized with a predetermined threshold and image information in which the thread 101 is represented as a black line is used. A white portion is included in the black line. If there is, it is determined that the image information is missing. Furthermore, referring to the magnetic information of the part corresponding to the missing part of the image information, if the magnetic information is also missing, it is determined that the thread 101 is missing, and if there is magnetic information, the thread 101 It is determined that there is no omission.
  • FIG. 10A shows a case where the entire magnetized portion 101a of the thread 101 is missing. In this case, since there is no magnetic information pulse at the location where the image information is missing, it can be determined that the thread 101 is missing.
  • FIG. 10B shows a case where a part of the magnetized portion 101a of the thread 101 is missing. In this case, since the position and intensity of the magnetic information pulse change at the location where the image information is missing, it can be determined that the thread 101 is missing.
  • FIG. 10C shows a case where most of the magnetized portion 101a of the thread 101 is missing.
  • the magnetic information pulse disappears at the location where the image information is missing, it can be determined that the thread 101 is missing.
  • the remaining portion of the magnetized portion 101a is small, the number of pulses corresponding to one magnetized portion 101a is one. Note that whether the magnetic information is in FIG. 10B or FIG. 10C can be adjusted by a circuit constant.
  • FIG. 10D shows a case where the thread 101 is not missing but part of the image information is missing. In this case, since there is a pulse of magnetic information at a location where image information is missing, it is determined that the thread 101 is not missing (normal).
  • FIG. 10E shows a case where a part of the thread 101 is missing but is difficult to detect.
  • the thread 101 since magnetic information exists at a predetermined position, it is determined that the thread 101 is not missing (normal) when the output of the change amount of the magnetic flux density is used. However, this missing can be detected by using the output of the absolute value of the magnetic flux density together.
  • the identification processing of the banknote 100 includes information (acquisition information) acquired by the image sensor module 15, the magnetic sensor module 19, the thickness detection sensor 17 and other sensors (not shown), and the type of banknote 100 (hereinafter, “denomination”). This is done by collating the money type information (type-specific information).
  • the money type information is stored in advance in a later-described storage unit of the banknote processing apparatus.
  • the money type information is obtained by converting the position and amount of the feature of the banknote 100 corresponding to the output of each sensor, the image of the banknote 100, etc. into data for identification processing. As shown in d), four types having different front and back sides and directions are prepared.
  • the identification process includes denomination determination, authenticity determination, and damage determination.
  • Various determination processes of the banknote 100 are performed by a determination unit (to be described later) of the banknote processing apparatus using the acquired information and the money type information.
  • denomination determination acquisition information and denomination information are collated and the denomination and direction of banknote 100 are determined.
  • authenticity determination the authenticity of the banknote 100 is determined by comparing the acquired information with the denomination information corresponding to the denomination and direction determined in the denomination determination.
  • the fitness determination the acquired information and the money type information corresponding to the money type and direction determined in the money type determination are collated to determine the money of the banknote 100.
  • appropriate information is selected.
  • the stain is determined based on collation using a reflected light image or a transmitted light image. Further, damage such as a defect, breakage, or tape sticking is determined based on collation using thickness information.
  • the presence / absence of the thread 101 is also determined in the authenticity determination. Specifically, since the thread 101 is detected as a black line in the transmitted infrared light image, it is determined whether or not there is a black line corresponding to the thread 101 at a predetermined position in the acquired transmitted infrared light image. . When the thread 101 is made of metal, the change in the capacitance of the bill 101 that passes through may be measured. When the thread 101 has magnetic information, it may be determined whether or not there is a change in magnetic flux density corresponding to the thread 101 at a predetermined position of the acquired magnetic information. The predetermined position where the thread 101 should be stored is stored as money type information.
  • FIG. 11 shows a judgment table for determining whether or not the thread 101 is missing using both the optical judgment and the magnetic judgment results.
  • the flow is shown in FIG.
  • the missing optical detection result is not missing and the missing magnetic detection result is not missing, it is determined as a genuine note (a good product without missing).
  • the missing optical detection result is missing and the missing magnetic detection result is not missing, it is determined to be a correct ticket.
  • the missing optical detection result is missing and the missing magnetic detection result is missing.
  • the banknote 100 for which the missing optical determination is determined as missing without regard to the missing magnetic determination is assumed to have a black line instead of the thread 101. Since such a banknote 100 is determined to be a fake note by the authenticity determination performed before the damage determination, it can be excluded in advance from the object of the damage determination. About this case, it can change so that it may be judged as a bad ticket by the setting of an apparatus. If the missing optical detection result is missing, and the missing magnetic detection result is missing, it is determined as a damaged ticket.
  • the determination flow illustrated in FIG. 12 corresponds to a flow for determining a missing magnetic detection result based on magnetic information when it is determined that a missing optical detection result is missing.
  • the thread 101 is detected based on the image information (step S11). Then, it is optically determined whether or not the thread 101 is missing (step S12). If it is determined in step S12 that there is a loss, the thread 101 is detected based on the magnetic information (step S13). Then, the presence or absence of the thread 101 is magnetically determined (step S14). If it is determined in step S14 that there is a loss, it is determined as a lost ticket (step S15: loss detection step). On the other hand, when it is determined that there is no omission in any of steps S12 and S14, it is determined as a genuine note (step S16: omission detection step).
  • the identification unit 50 that performs various determinations of the banknote 100 using the detection result obtained by the sensor unit 10 will be described.
  • the identification unit 50 includes a control unit 20 that controls the sensor unit 10 and the like, and a storage unit 30 that stores various types of information.
  • the control unit 20 controls the image sensor module 15 to display the reflected light image and the transmitted light image on both sides.
  • the magnetic sensor module 19 acquires magnetic information.
  • the control unit 20 includes at least a light source control unit 21, an image processing unit 23, and a determination unit 25.
  • the light source control unit 21 controls lighting of the light source in the image sensor module 15 with the banknote detection signal or the like generated by the photosensor 13a as a starting point.
  • the image processing unit 23 performs various processes such as amplification, A / D conversion (digitization), imaging, image correction, and storage in the storage unit 30 on the image information generated by the image sensor module 15. Imaging may be performed by combining a plurality of different pieces of image information. Note that the magnetic information generated by the magnetic sensor module 19 may be similarly processed by the image processing unit 23.
  • the determination unit 25 includes a type determination unit 25a that performs denomination determination, a genuineness determination unit 25b that performs authenticity determination, and a fitness determination unit 25c that performs fitness determination. Various determinations in the determination unit 25 are made with reference to the money type information 31 stored in the storage unit 30 as appropriate.
  • the type determination unit 25a compares the denomination information 31 stored in the storage unit 30 with the image information processed by the image processing unit 23 to determine the denomination. As the denomination information 31, for each denomination, as shown in FIGS. 3 (a) to 3 (d), four types with different front and back and orientations are stored in the storage unit 30. The direction of the banknote 100 can also be determined at the same time.
  • the authenticity determination unit 25b collates the money type information 31 corresponding to the money type determined by the type determination unit 25a with the image information acquired by the image sensor module 15 and the magnetic information acquired by the magnetic sensor module 19, and the bill Whether the 100 is a genuine product (genuine ticket) or a counterfeit product (fake ticket) is determined.
  • the presence or absence of the thread 101 is determined using detection results such as a transmitted infrared light image, magnetic information, and capacitance. That is, the presence / absence of the thread 101 is detected as part of the authenticity determination.
  • the banknote 100 is determined to be a fake ticket.
  • the money type information 31 corresponding to the money type determined by the type determination unit 25a, the image information acquired by the image sensor module 15, the magnetic information acquired by the magnetic sensor module 19, and the thickness detection sensor 17 are displayed.
  • the thickness information acquired in step 1 is collated to determine whether the bill 100 is a correct bill or a damaged bill. Specifically, it detects damage such as tears, holes, dirt, wrinkles, graffiti, and tape sticking. For example, by comparing an image of the banknote 100 with a black line drawn in the width direction with reference image information that is one of the denomination information 31, the black line part is detected, and the size of the detection target part is a threshold value. If it exceeds, it is judged as a non-compliance ticket by graffiti.
  • the reference image information is, for example, image information of a regular ticket, which is image information that serves as a reference for determining whether or not the card is correct.
  • the fitness determination unit 25c includes a missing detection unit 25d. That is, the missing detection unit 25d performs a process for detecting the loss of the thread 101 as part of the damage determination, and the banknote 100 in which the thread 101 is found to be missing is determined to be a damaged ticket.
  • a first example of detection processing by the missing detection unit 25d is as follows. First, when the transmitted infrared light image is binarized with a predetermined threshold, the thread 101 appears as a black line. If there is a white portion in the black line, it is optically determined as missing. Next, referring to the magnetic information of the portion corresponding to this missing, when it is determined that there is a missing magnetic information, it is finally determined that the thread 101 is missing, and when it is determined that there is magnetic information, It is finally determined that there is no missing thread.
  • the thread placement region set in the denomination template determined by the type determination unit 25a is read out, and a determination part used for detection of a missing thread 101 is determined. Then, the portion of the determination part that satisfies the condition where the pixel value is larger than the first threshold for thread detection is determined as the thread 101 (first determination).
  • the thread 101 is almost completely black in the transmitted infrared light image, but if the pixel value is larger in the black part, the thread 101 and the lack thereof are detected by determining whether or not the first threshold value is exceeded. Can do. When the transmitted infrared light image is blurred, the thread 101 becomes black with a little white.
  • a second threshold value slightly smaller than the first threshold value is set and the second value at the position (X) is set. If it is less than the threshold value, the pixel value at the position (X + shift) shifted further by a predetermined amount in the width direction of the thread 101 is also compared, and the difference between the pixel values at the position (X) and the position (X + shift) is the third.
  • the thread 101 is determined (second determination). A part that does not satisfy the first determination and the second determination is determined to be missing. As described above, the missing optical determination based on the transmitted infrared light image is performed, and the confirmation position based on the magnetic information is determined based on the result (step S1).
  • the output value of the magnetic information is compared with a predetermined threshold value, and if it is less than the threshold value, it is determined that the thread 101 is missing.
  • the determination of whether or not the thread 101 is missing in the magnetic information is as described with reference to FIGS. 8 and 9 (step S2).
  • the missing is optically determined from the transmitted infrared light image, and the missing is magnetically determined from the magnetic information. Both the optical determination and the magnetic determination result are missing. The determined part is finally determined that the thread 101 is missing.
  • Optical determination and magnetic determination may be performed in the same manner as in the first example. Note that the first example has the advantage that the amount of processing of magnetic information can be reduced, and the disadvantage that a lack that cannot be detected by image information cannot be found, compared to the second example.
  • the missing part is obtained from the transmitted infrared light image as in the first example, the missing part is 0 (white), and the other part is 1 (black). Based on the first binarized image and the acquired magnetic information, the second position where the magnetic information is not present at the position where the magnetic information should be 0 (white) and the other portion is 1 (black). A binarized image, and further, an OR operation is performed on the corresponding position values of the first and second binarized images to create a superimposed image. When there are more than a predetermined number of parts, it is determined that there is a missing part.
  • the transmitted infrared light image acquired by the image sensor module 15 and the magnetic information acquired by the magnetic sensor module 19 are converted into a block image as shown in FIG.
  • a superimposed image is created with the average of the pixel values at the corresponding positions as the pixel value between the image and the magnetic image, and pixels whose pixel values are less than a predetermined threshold value are predetermined in the thread 101 portion of the superimposed image. When there are more than a few, it is determined that there is a loss.
  • the missing detection unit 25d may use image information other than the transmitted infrared light image. Further, as a method for detecting the loss of the thread 101, a comparison with the money type information 31 stored in the storage unit 30 may be used instead of a comparison with a threshold value.
  • the comparison method is not particularly limited, and for example, various methods such as image density comparison, information amount gradient comparison, and average value comparison can be used.
  • the information used by the missing detection unit 25d to detect the loss of the thread 101 may be information on the entire banknote 100, or information on the thread 101 extracted from information on the entire banknote 100 after specifying the position of the thread 101. It may be.
  • the pixel corresponding to the position of the thread 101 that is the target of the missing detection is extracted using the position information of the thread 101 corresponding to the denomination and direction determined by the type determination unit 25a. The method of doing is mentioned.
  • the missing detection unit 25d has a pattern corresponding to the denomination thread 101 determined by the type determination unit 25a (for example, “1” for the thread portion and “1” for the other portion).
  • a method of multiplying with a mask image having (image information “0”) may be used. Moreover, you may use the method of pinpointing the position of the thread
  • the banknote processing apparatus includes image information obtained by the image sensor module 15 by including at least the identification unit 50 including the sensor unit 10, the control unit 20, the storage unit 30, and the like.
  • the absence of the thread 101 can be determined using the magnetic information obtained by the magnetic sensor module 19.
  • the missing determination threshold is tightened, an erroneous determination occurs, and thus the threshold cannot be tightened.
  • the magnetic information obtained by the magnetic sensor module 19 is combined, among those determined to be missing in the missing determination based on the image information, the one in which the magnetic information is detected is determined again without being lost. Can do. For this reason, image information and magnetic information are used in combination, and the threshold for determining omission based on image information is tightened, so that even a small omission can be accurately detected while preventing erroneous determination.
  • the banknote processing apparatus may be a combination of the identification unit 50 as an independent apparatus with another banknote processing unit, or another banknote processing unit including the control unit 20 and the storage unit 30.
  • the sensor unit 10 may be incorporated therein.
  • the banknote processing apparatus which concerns on this embodiment has a conveyance processing part which controls conveyance of the banknote 100 in a banknote processing apparatus.
  • the conveyance processing unit controls driving of the conveyance mechanism 11 and the branch mechanism.
  • the branching mechanism is provided in the transport path and switches the transport destination of the banknote 100, and the transport control unit is selected from a plurality of stacking units connected to the transport path according to the determination result of the missing detection unit 25d. Then, a specific stacking unit that is the transport destination of the banknote 100 is selected, and the branch mechanism is driven.
  • the transport processing unit is included in the control unit of the entire banknote processing apparatus provided at the upper level of the control unit 20 of the identification unit 50.
  • the banknote handling apparatus may have the configuration shown in FIG. 15 or FIG. 16, for example.
  • the banknote handling apparatus 200 shown in FIG. 15 includes a hopper 210 on which a plurality of banknotes can be placed, a transport path 211 that transports banknotes placed on the hopper 210, a sensor unit 10 that performs banknote identification processing, and a sensor.
  • a stacking unit 213 that stacks banknotes identified by the unit 10 and a reject unit 214 that stacks banknotes satisfying a predetermined condition separately from other banknotes.
  • banknote device 200 By using the sensor unit 10 in such a banknote device 200, a plurality of banknotes placed on the hopper 210 are continuously processed and determined as a fake ticket, a damaged ticket, or a genuine / indeterminate ticket. Banknotes can be returned to the reject unit 214 and sorted.
  • the banknote processing apparatus 300 shown in FIG. 16 is a small banknote processing apparatus that is installed on a table and used, and a sensor unit (not shown) that performs banknote identification processing and a plurality of banknotes to be processed are stacked.
  • Hopper 301 placed on the body, and two rejects from which the reject banknote is discharged when the banknote fed out from the hopper 301 into the housing 310 is a reject banknote such as a fake ticket or a true / false uncertain ticket Unit 302, operation unit 303 for inputting an instruction from an operator, and four stacking units 306a to 306a for classifying and stacking banknotes whose denomination, authenticity, and correctness are identified in housing 310 306d, and a display unit 305 for displaying information such as the banknote identification count result and the stacking status of each stacking unit 306a to 306d.
  • the stacking units 306a to 306d store the correct bills, and the stacking unit 306d stores the damaged bills based on the result of the damage determination by the identification unit. It should be noted that the method for distributing banknotes to the stacking units 306a to 306d can be arbitrarily set.
  • the banknote processing apparatus 200 shown in FIG. 15 or the banknote processing apparatus 300 shown in FIG. 16 performs denomination determination and authenticity determination in the first process, sorts banknotes into denominations, and performs the second process.
  • the banknote processing may be performed in two steps, such as determining whether the arranged banknotes are correct or not. Moreover, you may perform authenticity determination with respect to the banknote by which authenticity determination was performed in another place.
  • the authenticity determination unit 25b can be omitted.
  • the bill 100 is shown as the processing medium of the valuable document processing apparatus.
  • the valuable document processing apparatus of the present invention processes a valuable document provided with a thread having magnetic information.
  • gift certificates, checks, securities, card-like media, etc. may be processed.
  • the thread 101 may be a discontinuous body that is divided into a plurality of portions by a gap. In that case, by including the thread form in the denomination information and excluding the thread gap from the object of missing detection, erroneous detection of missing can be prevented.
  • the configuration of the identification unit 50 can be changed as appropriate.
  • the identification unit 50 of the said embodiment showed the example (short conveyance) in which the conveyance direction of the banknote 100 is parallel to the short side of the banknote 100, and is parallel to the longitudinal direction of the thread
  • the conveyance direction of 100 may be parallel to the longitudinal direction of the banknote 100 and perpendicular to the longitudinal direction of the thread 101 (longitudinal conveyance).
  • the direction of the banknote 100 and the thread 101 with respect to the image sensor module 15 and the magnetic sensor module 19 is different from that in the above embodiment, but the main scanning direction (perpendicular to the transport direction) in the image sensor module 15 and the magnetic sensor module 19. If the resolution in the sub-scanning direction (conveying direction) is sufficient, image information and magnetic information can be acquired in the same manner as in the above embodiment, and missing detection processing can be performed in the same manner.
  • the direction of the thread 101 is different, and thus the detection procedure of the magnetized portion 101a is different.
  • the magnetized portion 101a After the detection of the magnetized portion 101a, it is possible to detect the absence of the thread 101 as in the case of the short conveyance described above.
  • a magnetic detection element 19c that detects a change in magnetic flux density or a magnetic detection element 19c that detects the strength of the magnetic flux density can be used.
  • Whichever magnetic detection element 19c is used not only the position where the magnetic flux density changes greatly but also the magnetized portion 101a can be detected. For this reason, the missing part of the sled 101 detected optically and the missing part of the magnetized part of the sled 101 detected magnetically are compared, for example, a small missing like the missing part shown in FIG. Parts can also be detected.
  • the magnetic head 19a moves in the X direction of FIG. Therefore, a part of the magnetic detection elements 19c does not detect the magnetized portion 101a a plurality of times as in the case of short conveyance, but a plurality of the magnetic detection elements 19c arranged in the width direction of the conveyance path are once magnetized portions 101a. Will be detected.
  • the output when each magnetic detection element 19c detects the magnetized portion 101a is the same as in FIG.
  • each magnetic detection element 19c of the magnetic sensor module 19 when the output of each magnetic detection element 19c of the magnetic sensor module 19 is larger than a predetermined value, it is determined that the magnetized portion 101a exists at a position corresponding to each magnetic detection element 19c. Based on this determination, magnetic information related to the presence or absence of the magnetized portion 101a is created for at least the thread 101 of the banknote 100.
  • the format of the magnetic information may be image information or numerical information depending on the later processing.
  • the magnetic detection element 19c that detects a change in magnetic flux density by short conveyance is used, the presence or absence of the missing portion of the thread 101 is detected based on the presence or absence of the magnetized portion 101a as well as the position where the magnetic flux density changes greatly. it can. Specifically, the presence of the magnetized portion 101a is detected by integrating the output as shown in FIG. 6A and obtaining the result of FIG. 6B.
  • the magnetized portion 101a of the thread 101 is detected.
  • the magnetized portion 101a may be an unmagnetized magnetic material portion. If the magnetic information detection method combines a magnetizing magnet and a magnetic detection element, an unmagnetized magnetic material portion can be detected in the same manner as the above-described magnetized portion 101a, and therefore includes an unmagnetized magnetic material portion. The detection of the missing part of the thread 101 can be performed in the same manner.
  • the magnetic detection element 19c may output.
  • the magnetic flux density of the non-magnetized portion and the magnetic flux density of the magnetized portion 101a are different, the output absolute value and change amount are different, and the non-magnetized portion and the magnetized portion 101a are distinguished by setting an appropriate threshold value. be able to.
  • the thread 101 having the magnetized portions 101a at regular intervals as shown in FIG. 5 is taken as an example. However, even if the thread 101 has the length and interval of the magnetized portions 101a changed, the threads 101 are constant. If the pattern is repeated, it is possible to cope with the same. Specifically, first, the magnetic information of the thread 101 detected by the magnetic sensor module 19 and the magnetic pattern information of the thread 101 stored in the denomination information corresponding to the determined denomination and direction, The information is collated while being circularly shifted in the length direction of the thread 101 (shift that handles one end and the other end being connected) to identify the position of the magnetic pattern. Next, a thread magnetic image is obtained by performing blocking according to the magnetic pattern information. In this way, the lack of the thread 101 can be detected as in the above-described method.
  • the present invention is a useful technique for accurately identifying the correctness or loss of a valuable document in which a security thread is employed to prevent forgery.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computer Security & Cryptography (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

La présente invention concerne un dispositif de traitement de document de valeur capable de détecter une omission partielle dans un fil de sécurité avec une plus grande précision. Le dispositif de traitement de document de valeur de la présente invention est par exemple un dispositif de traitement de billets qui détecte une omission partielle dans un fil de sécurité d'un billet de banque et qui est pourvu : d'un capteur d'image qui détecte des informations d'image sur le billet de banque transporté sur un chemin de transport ; un capteur magnétique qui détecte des informations magnétiques concernant au moins le fil de sécurité du billet de banque transporté sur le chemin de transport ; et une unité de détection d'omission qui détecte l'omission partielle sur la base des informations d'image et des informations magnétiques.
PCT/JP2016/060248 2016-03-29 2016-03-29 Dispositif de traitement de document de valeur et procédé de traitement de document de valeur WO2017168592A1 (fr)

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