JP2007213148A - Device and method of determining genuineness of banknote, device and method of registering surface characteristics of banknote, system of determining genuineness of banknote, device and method of printing card, device and method of determining genuineness of card, system of determining genuineness of card, and card - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method of determining genuineness of a banknote, a device and method of registering surface characteristics of the banknote, and a system of determining genuineness of the banknote capable of improving reliability of genuineness determination of the banknote. <P>SOLUTION: Surface characteristics at a plurality of previously registered places of the banknote being a target of genuineness determination is obtained from a database 405. An image input part 401 reads the surface characteristics at the plurality of places of the banknote. An image collation part 408 collates the obtained surface characteristics at the plurality of places and the read surface characteristics at the plurality of places. A genuineness determination part 409 determines the genuineness of the banknote. In such manners, the surface characteristics at the plurality of previously registered places of the banknote being the target of genuineness determination are obtained, the surface characteristics at the plurality of places of the banknote are read, and the genuineness of the banknote is determined based on the obtained surface characteristics at the plurality of places and the read surface characteristics at the plurality of places. Thus, the reliability of determination can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a banknote authenticity determination device and method, a banknote surface feature registration apparatus and method, a banknote authenticity determination system, a card printing apparatus and method, a card authenticity determination apparatus and method, a card authenticity determination system, And about cards.

  Conventionally, various inventions have been proposed regarding bill authenticity determination methods.

  Irradiates a minute spot light along the bill detection line, receives the reflected minute spot light at the light receiving part, and sequentially detects the presence or absence of minute swells on the detection line by the displacement of the light receiving position at the light receiving part. Compare the entire pattern of minute swells with that of genuine banknotes, and if it matches the corresponding part of genuine banknotes for 10mm or more in any part of the total pattern, There has been proposed an apparatus that determines authenticity and otherwise determines non-authentic (see Patent Document 1).

  Moreover, the light irradiated to the banknotes to be transported is the varieties of visible light and invisible light, and the light receiving elements are arranged in tandem along the banknote transport direction, and the edges are removed from the watermark, embossing, and pattern printing by invisible light. There has been proposed an apparatus for checking the ink content and color printed by visible light on a part (see Patent Document 2). In this check, the level difference of the synthesized waveform with the genuine data stored in advance is observed.

  Furthermore, the data collection device for collecting various banknote data and the identification / appraisal device are configured independently, and the data and the program related to the identification / appraisal processing are distributed from the host computer and provided. Has been proposed (see Patent Document 3).

  Conventionally, the following invention has been proposed regarding a method for determining the authenticity of a prepaid card.

  Whether or not the prepaid card is a counterfeit card based on the comparison result by comparing and collating the information for identifying the prepaid card preprinted on the main surface of the prepaid card with the specific information stored in the storage area of the prepaid card. (See Patent Document 4).

In addition, a plurality of two-dimensional codes corresponding to the first remaining amount are printed on a prepaid card having a magnetic tape storing the remaining amount data, and the remaining amount data read by the magnetic reader / writer and the CCD reader are used. An apparatus that determines a counterfeit card when the read remaining amount data does not match is determined (see Patent Document 5).
JP-A-6-301840 JP 2000-67298 A Japanese Patent Laid-Open No. 2001-195628 Japanese Patent Laid-Open No. 4-77783 Japanese Patent Laid-Open No. 10-63922

  However, all of the inventions disclosed in the first to third patent documents are effective for counterfeit bills produced by color copiers and offset printing, but are not suitable for special paper / intaglio printing. It is difficult to deal with ultra-precise counterfeit bills, and authenticity judgment is unreliable. Further, if the authenticity determination method or procedure is exposed, there is a risk that the counterfeit bill is erroneously determined to be a true bill, and the authenticity determination is not reliable. For this reason, it is important to manage the authenticity determination device, and the customer and the store clerk cannot easily determine the authenticity.

  The present invention has been made in view of the above facts, and provides a bill authenticity determination device and method, a bill surface feature registration device and method, and a bill authenticity determination system capable of improving the reliability of bill authenticity determination. This is the first purpose.

  Further, in the inventions disclosed in the fourth and fifth patent documents, there is a risk that information preliminarily printed on the surface (two-dimensional code) and specific information preliminarily stored in the storage area of the prepaid card may be forged. .

  The present invention has been made in view of the above-described facts. A card printing apparatus and method, a card authenticity determination apparatus and method, a card authenticity determination system, and a card that can determine authenticity even if the card is forged. The second purpose is to provide it.

  In order to achieve the above object, the invention according to claim 1 is characterized in that an acquisition means for acquiring surface features of a plurality of pre-registered positions of a bill to be judged as authenticity, a reading means for reading the surface features of a plurality of places of the bill, And determining means for determining the authenticity of the banknote based on the acquired surface features of the plurality of locations based on the read surface features of the plurality of locations.

  That is, the acquisition means acquires surface features at a plurality of locations registered in advance for the banknote to be authenticated.

  Here, various acquisition methods by the acquisition means are possible.

  For example, it acquires from a banknote surface registration apparatus.

  Here, the bill surface registration device, as in claim 6, a reading means for reading the surface features of a plurality of locations of the bill, and a registration means for registering the surface features of the plurality of locations of the bill read by the reading means; It is equipped with. The registering means may register the surface feature in an encrypted state as in claim 7.

  In this way, when a plurality of surface features are registered in the banknote surface feature registration device, the acquisition means, as in claim 2, obtains information on the surface features of the plurality of locations from the banknote surface feature registration device. You may make it receive from. Note that the bill authenticity determination device includes a storage unit that stores the received surface feature, temporarily stores the received surface feature in the storage unit as described above, and the acquisition unit acquires the surface feature from the storage unit. It may be.

  In addition, as described above, there is provided storage means for storing the surface features of a plurality of locations of banknotes without receiving, and the acquisition means acquires the surface features of a plurality of locations registered in advance from the storage means. It may be.

  Moreover, you may make it register the information of the surface characteristic of several places of a banknote in the encrypted state like Claim 4.

  The reading means reads surface features at a plurality of locations of the banknote.

  Here, as in claim 3, when the number of the plurality of locations for reading the surface features of the bill by the reading means is less than the number of candidate locations for reading the surface features of the bill, the reading means You may make it read the surface characteristic of the said banknote at random from inside.

  Further, as in claim 5, the area of the portion read by the reading means may be made larger than the area of the surface feature portion registered in advance of the banknote.

  And a determination means determines the authenticity of a banknote based on the acquired surface feature of a plurality of places, and the read surface feature of a plurality of places.

  As described above, the surface features of a plurality of pre-registered locations of the banknote to be determined as authenticity are acquired, the surface features of the plurality of locations of the banknote are read, and the surface features of the plurality of locations acquired are read. Since the authenticity of the banknote is determined based on the surface feature, the reliability of the determination can be improved.

  The banknote authenticity determination apparatus according to an eighth aspect of the present invention is the banknote authenticity determination apparatus according to any one of the first to fifth aspects, and the banknote surface feature registration apparatus according to the sixth or seventh aspect, It has. Since each device is the same as the above-described invention, the description thereof is omitted.

  The invention according to claim 9 is a step of acquiring a plurality of pre-registered surface features of a bill subject to authenticity determination, a step of reading the surface features of a plurality of portions of the bill, and the acquired plurality of surfaces. Determining the authenticity of the banknote based on the feature and the read surface features of the plurality of locations.

  The invention according to claim 10 includes a step of reading the surface features at a plurality of locations of the bill and a step of registering the surface features at the plurality of locations of the read bill.

  The invention described in claim 9 has the same operation and effect as the invention described in claim 1 described above, and the invention described in claim 10 provides the same operation and effect as the invention described in claim 6 described above. Omitted.

  The card printing apparatus according to claim 11 is characterized in that the reading means for reading the surface feature of the predetermined portion of the card storing the value information, and the information of the read surface feature of the predetermined portion are used as the predetermined portion of the card. And printing means for printing in a place other than the above.

  Here, the card for storing the value information includes, for example, a prepaid card for storing information such as price information, a cash card for storing deposit / savings information, a credit card, and the like.

  The reading means reads the surface feature of the predetermined location of the card that stores the value information, and the printing means prints the read surface feature information of the predetermined location at a location other than the predetermined location of the card.

  In this case, the printing unit prints the surface feature information at the time of issuing the card as in claim 12, or encrypts the surface feature information as in claim 13. You may make it print with.

  As a result, a card for storing value information in which information of surface features at a predetermined location is printed at a location other than the predetermined location can be obtained.

  As described above, when the surface feature information at a predetermined location is printed on the card storing the value information at a location other than the predetermined location, even if the value information is illegally obtained and the card is forged, the following is performed. If authenticity is determined, the card is determined to be a counterfeit card.

  That is, the invention described in claim 15 is based on reading means for reading a predetermined portion of a card for storing value information and a portion other than the predetermined portion, and information on the read predetermined portion and a portion other than the predetermined portion. Determining means for determining the authenticity of the card.

  The reading means reads a predetermined portion of the card that stores the value information and a portion other than the predetermined portion. In addition, as described in claim 16, the reading unit may read an area including the predetermined location and larger than the predetermined location when reading the predetermined location.

  Then, the determination means determines the authenticity of the card based on the read predetermined location and information on locations other than the predetermined location.

  Thus, since the predetermined location of the card and a location other than the predetermined location are read, and the authenticity of the card is determined based on the read information on the predetermined location and the location other than the predetermined location, as described above. If the information on the surface features of a predetermined part of the card is printed in a place other than the predetermined part, the forged card is a counterfeit card because the information on the predetermined part and the part other than the predetermined part do not correspond. Can be determined.

  A card authenticity determination system according to a seventeenth aspect of the invention includes the card printing device according to any one of the eleventh to thirteenth aspects, and the card authenticity determination device according to the fifteenth or sixteenth aspect. ing. Since each device is the same as the above-described invention, the description thereof is omitted.

  According to an eighteenth aspect of the present invention, the step of reading a surface feature at a predetermined location of a card storing value information and printing the read surface feature information at the predetermined location at a location other than the predetermined location of the card. And a step of performing.

  The invention according to claim 19 is the step of reading a predetermined portion of a card storing value information and a portion other than the predetermined portion, and based on the read predetermined portion and information of a portion other than the predetermined portion, the card. Determining the authenticity of the.

  The inventions described in claims 18 and 19 are the same as the inventions described in claims 11 and 15, and the description thereof is omitted.

  The present invention acquires a plurality of pre-registered surface features of a bill subject to authenticity determination, reads a plurality of surface features of the bill, and acquires a plurality of acquired surface features of a plurality of locations. Since the authenticity of the banknote is determined based on the surface feature, the reliability of the determination can be improved.

  In addition, the present invention reads the predetermined location of the card and locations other than the predetermined location, and determines the authenticity of the card based on the read information on the predetermined location and locations other than the predetermined location. If the surface feature information at a predetermined location is printed at a location other than the predetermined location, the counterfeit card does not correspond to the information at the predetermined location and the location other than the predetermined location, so it is determined that the card is a counterfeit card. can do.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a banknote information registration device 100. The banknote information registration device 100 includes a banknote feature image input unit 101 that reads a banknote feature image from a part of a banknote. The bill feature image input unit 101 reads, for example, a change in the surface unevenness caused by the randomness of the entanglement of the fibrous material forming the bill from the plain portion of the bill 200 as shown in FIG. Reflected light is optically read when light is applied to a corner 202 or a region 202 other than the watermark in the watermarked portion or other plain portion. In order to cope with the deterioration of banknotes in the process of distribution and the inability to read changes in surface irregularities, the features of a plurality of areas are read and registered. For example, as shown in FIG. 2, the banknote corner 201 reads changes in surface irregularities from eight regions of 201 (1 to 8) in one corner and 32 regions of 201 (1 to 32) in total of four corners. Similarly, if the change in surface irregularities is read from the eight areas 202 (1 to 8) in the area 202 other than the watermark in the part where the watermark is inserted, a total of 201 (1 to 32) is obtained from one banknote. And 202 (1-8), the change in surface irregularities is read from 40 regions. Each area is numbered, for example, 201 (1-8) and 202 (1-8) shown in the lower part of FIG. 2, and 201 (1-32) is numbered 1 to 32, 202. (1 to 8) correspond to No. 33 to No. 40, and the numbers and areas correspond one-to-one. All 40 areas from No. 1 to No. 40 may be registered, but registration is necessary when the amount of registration information for one bill is large and it takes a long time to collate. An area may be selected. The selection of the registration area is desirably random in order to cope with forgery.

  The banknote information registration device 100 includes a registration area selection unit 106 that selects an area for reading a feature of a banknote to be registered. The registration area selection unit 106 includes, for example, seven areas from 40 areas from No. 1 to No. 40. Select at random. At this time, in order to cope with the breakage and dirt of the banknote, the region 201 (1-8), 201 (9-16), 201 (17-24), 201 (25-32), 202 (1-8) One region may be selected from each region, and in that case, the remaining two may be selected at random from the whole. The number of the selected registration area may be encrypted with a secret key.

  The banknote information registration device 100 includes a banknote unique information conversion unit 102 that converts an image of an area selected from the read banknote feature image into banknote unique information, and the banknote unique information conversion unit 102 includes a banknote feature image input unit. A signal processing circuit (not shown) that converts the signal output from the digital signal 101 into digital data and outputs the digital data is provided, and the digital signal is converted into digital data having a predetermined resolution (for example, 400 dpi) and a predetermined gradation (for example, 8-bit gray scale). . The converted digital data may be further encrypted with a secret key.

  The banknote information registration device 100 includes a banknote serial number input unit 103 that reads a serial number of a banknote, and optically reads the serial number (203 and 204) of the banknote 200 that has read the unique information.

  The banknote information registration device 100 includes a banknote serial number conversion unit 104 that converts the serial number of a read banknote into information that can be easily verified. The banknote serial number conversion unit 104 is output from the banknote serial number input unit 101. A signal processing circuit (not shown) that converts the signal into digital data and outputs the digital data is provided, and converts the digital data into an alphanumeric string indicated by the serial number (203 and 204) of the banknote 200. The converted digital data may be further encrypted with a secret key.

  The banknote information registration device 100 includes a banknote unique information registration database 105, the banknote unique information of a plurality of areas output from the banknote unique information conversion unit 102, the banknote serial number output from the banknote serial number conversion unit 104, and The registration area number output from the registration area selection unit 106 is associated and stored.

  The banknote feature image input unit 101 may be, for example, a flat bed type scanner as shown in FIG. 3A, and a CCD line sensor used in the flat bed scanner and a line illumination for scanning the reading position of the document. But you can. Further, a combination of a CCD area sensor as shown in FIG. 3B and illumination that irradiates the field of view of the CCD area sensor may be used. When an area as shown in FIG. Five combinations of the CCD area sensor and the illumination that irradiates the field of view of the CCD area sensor are required. The registration area selection unit 106 and the bill specific information conversion unit 102 may be, for example, a dedicated signal processing circuit (not shown) including a microcomputer, or a personal computer (PC) as shown in FIG. Alternatively, both of them may be connected via respective input / output ports. The banknote serial number input unit 103 and the banknote serial number conversion unit 104 are configured similarly to the banknote feature image input unit 101 and the banknote unique information conversion unit 102, respectively, and the banknote serial number input unit 103, the banknote feature image input unit 101, and The banknote serial number conversion unit 104 and the banknote unique information conversion unit 102 may also serve as each other. The banknote unique information registration database 105 may be, for example, a medium that can be recorded by light or magnetism, and may be a hard disk drive (HDD) connected to an input / output port in the case of a PC.

  Next, registration of bill specific information will be described.

  A registration apparatus 300 (see FIG. 5) that reads the unique information and serial number of a banknote and is registered in the database, which is a specific apparatus of the banknote information registration apparatus 100 shown in FIG. 1, sends the banknote 200 from the right side to the left side of the figure. Drive rollers 301a and 301b, guide rollers 302a and 302b for guiding the feeding of the banknote 200, a line light source 303 for irradiating the surface of the banknote 200 in a line, and a CCD line sensor 305 for converting the density of the surface state of the banknote 200 into an electrical signal. And an imaging lens 304 that forms an image of the surface state of the banknote 200 irradiated by the line light source 303 on the CCD line sensor 305.

  For example, the registration device 300 reads the surface state every time as the bill 200 moves, immediately before or during the step of inspecting the cut bill in the bill manufacturing process, and the CCD line sensor 305. A banknote unique information registration program digitized by an image processing circuit (not shown) to which a line image inputted from is inputted, inputted to a PC (not shown) via a bus, and stored in the PC in advance Follow the procedure to register the banknote's unique information and serial number.

  That is, when the bill 200 is inserted into the registration device 300 along an automatic feeding device (not shown) and its guide (not shown), the driving roller 301b, the guide roller 302b, and the guide (not shown) are used as shown in FIG. Is sent from the right side to the left side at a constant speed. The CCD line sensor 305 and the image processing circuit (not shown) send images to the PC (not shown) every moment. On the PC, one area is randomly selected from each area of the banknotes 201 (1-8), 201 (9-16), 201 (17-24), 201 (25-32), 202 (1-8). In addition, a total of seven regions are selected by randomly selecting two regions from the entire region. Further, the PC extracts and processes the serial number. As a result, the surface condition of the seven areas of the banknote 200, for example, about 2 mm × about 2 mm at 32 × 32 dots in the case of 400 dpi is read and obtained with a predetermined resolution (400 dpi) and a predetermined gradation (8-bit gray scale). The obtained image data is encrypted with a secret key and stored in a storage device (for example, HDD) of the PC. Since the reading resolution is 400 dpi, the reading gradation is 8-bit gray scale, and the area to be read is 32 × 32 dots, the data size of one area is 1024 bytes, and the gradation value (brightness) of each pixel (dot) Value) is an integer value in the range of 0-255. FIG. 6 shows an example of an image obtained by visualizing (contrast correction for easy viewing) the image represented by the data obtained by the above reading. Moreover, the size of the area of 201 (1-8), 201 (9-16), 201 (17-24), 201 (25-32), 202 (1-8) of the banknote 200 is about 5 mm × about It is assumed that the surface state to be read is about 2 mm × about 2 mm from the substantially central portion of the region. At the same time, the serial number of the banknote 200 is converted into a digital code by an OCR (Optical Character Reader) or the like, and associated with the unique information (data file) of the banknote as a database as shown in Table 1 together with the selected registration area number. And stored in a storage device (for example, HDD) of the PC.

  In addition to the serial number and unique information, the database also includes a randomly selected area number, which can be used to indicate an area to be read from an actual banknote when collating. The serial number and the number of the area selected at random may be encrypted with the secret key. Furthermore, information such as bill type and date of manufacture may be added to the database. In order to use the registered database as reference data for the bill authenticity determination device, when the PC is connected to the Internet, the data may be transferred to a bill specific information management server connected to the Internet. In addition, data is recorded on a medium for recording digital information with light or magnetism, such as a floppy (registered trademark) disk, CD-R, DVD-R, removable HDD, etc. It may be used as reference data. In addition, data may be separately transferred from a PC connected to the Internet to the bill specific information management server via the medium.

  Also, for example, immediately after the step of printing symbols and numbers in the banknote manufacturing process, or when the banknote specific information is read and registered in the database, the serial number of the banknote is directly recorded on the digital data to be printed. By handing it over, it is possible to omit processing such as serial number extraction and OCR.

  In this embodiment, a CCD line sensor is used to capture image data on a moving banknote, but depending on the movement speed of the banknote, the brightness of the imaging lens, the shutter speed, an area sensor (CCD, CMOS, etc. ) May be used, and image data may be taken in a state where the bill is stationary. In this case, the conditions of the brightness of the imaging lens and the shutter speed are alleviated.

  Then, the authenticity determination of a banknote is demonstrated.

  FIG. 7 shows a bill authenticity determination device 400. The authenticity determination device 400 is the same as or duplicated with the banknote feature image input unit 401 and the banknote unique information conversion unit 402 and the banknote unique information registration database 105 shown in FIG. The banknote specific information registration database 405 is provided.

  The input unit 401 includes a registration area with respect to each area selected by the registration area selection unit 106 of the banknote 200 read by the banknote information registration apparatus 100, and an area wider than that area (for example, 400 dpi). In the case of (4), the characteristics of the second area (about 4 mm × about 4 mm) are read at 64 × 64 dots. Information on the banknote area used for registration is taken into the registration area selection unit 410 from the banknote unique information registration database 405, and the characteristics of the plurality of areas registered in the registration area selection unit 410 are converted into digital data. The selected data is, for example, from each area of the banknotes 201 (1-8), 201 (9-16), 201 (17-24), 201 (25-32), 202 (1-8). There are a total of 7 areas, 1 area and 2 areas from the entire area. Since the size of the region is about 5 mm × about 5 mm, it is assumed that the surface state to be read is about 4 mm × about 4 mm from the substantially central portion of the region. The first storage unit 403 temporarily stores the converted digital data, and in the example, collation data in seven areas is recorded.

  The authenticity determination device 400 includes a banknote serial number input unit 404 that reads the serial number of a banknote, and optically reads the serial number (203 and 204) of the banknote 200 from which the unique information is read, or inputs it by other means. The authenticity determination device 400 searches the banknote unique information registration database 405 for a plurality of banknote unique information stored in association with the serial number input from the banknote serial number input unit 404, and encrypts it using the banknote unique information conversion unit 102. A bill unique information conversion unit 406 for decrypting with the public key paired with the secret key used for the first and a second storage unit 407 for temporarily storing the decrypted bill unique information. ing. In the second storage unit 407, the respective registration data in the seven areas selected by the registration area selection unit 106 are recorded.

  The authenticity determination device 400 includes an image verification unit 408, and images of seven banknote unique information stored in the first storage unit 403 and banknote unique information registration stored in the corresponding second storage unit 407. The seven banknote specific information images registered in the database 405 are compared and collated one by one. Further, the authenticity determination device 400 includes an authenticity determination unit 409, and the corresponding banknote-specific information stored in the second storage unit 407 is included in the image of the banknote-specific information stored in the first storage unit 403. It is determined for each of the seven areas whether or not an information image is included. For example, the image of the corresponding banknote specific information stored in the second storage unit 407 in the image of the banknote specific information stored in the first storage unit 403 for four areas among the seven areas. Is included, it is assumed to be a true banknote issued by the country. In addition, for example, in the image of the banknote unique information stored in the first storage unit 403 for only three of the seven areas, the corresponding banknote unique stored in the second storage unit 407 is included. If the information image is not included, it is determined that there is a possibility of a banknote. The authenticity determination device 400 is composed of the same equipment as the banknote information registration apparatus described in FIG. 1, and banknote unique information conversion, image verification, and authenticity determination are stored in advance in a PC, for example. Do it programmatically.

  Next, the authenticity determination of a banknote is demonstrated more concretely.

  For example, in an organization that handles banknotes such as banks, an optical image reading device having a function of a flatbed scanner (a in FIG. 3) or a CCD area sensor and a personal computer (PC) connected to the optical image reading device ) (FIG. 4) is installed, and the authenticity of the banknote is determined according to the banknote authenticity determination program stored in advance in the PC. First, a bill is placed on the optical image reading portion of the optical image reading device, and a bill authenticity determination start command is output to the PC in accordance with the instruction of the PC display on which the bill authenticity determination program is activated (for example, on the display). Click the displayed bill authenticity start button with the mouse). Thereby, the surface state of the registered unique information area candidate of the banknote is read at a predetermined resolution (400 dpi) and a predetermined gradation (8-bit gray scale), and the obtained image data is transferred from the scanner to the PC. And stored in a storage device (for example, HDD) of the PC. For each piece of bill specific information, the reading resolution is 400 dpi, the reading gradation is 8-bit gray scale, and the reference area to be read is 64 x 64 dots (about 4 mm x about 4 mm), so the image data size is 2048 bytes. Thus, the gradation value (brightness value) of each pixel (dot) is an integer value in the range of 0-255. For example, it is assumed that there are 40 image data as candidates for the unique information area of the banknote. At the same time, the serial number of the banknote is read and converted into a digital code by OCR or the like.

  Next, the serial number is transferred to the server for managing banknote unique information connected to the PC via the Internet, and the unique information image data of the banknote associated with the serial number and the selected area data (for example, banknote) 200 from 201 (1-8), 201 (9-16), 201 (17-24), 201 (25-32), 202 (1-8) from each region, and from the entire region 2 areas in total (7 areas) are taken into the PC and decrypted with the public key. For example, the decrypted unique information image data of seven banknotes (the first feature of about 2 mm × about 2 mm at 32 × 32 dots in the case of 400 dpi per one) and the corresponding banknote unique information image data stored earlier Are compared one by one with the selected 7 area data (the second feature of 64 × 64 dots at 4 dpi × about 4 mm × about 4 mm in case of 400 dpi), for example, 4 out of 7 areas It is verified whether the first feature is included in the second feature region for two or more regions. For the verification, a method is used in which the maximum correlation value and the normalized score of the maximum correlation value are used for determination.

  Although this embodiment does not describe the installation of banknotes in the optical image reading apparatus, it may be installed manually or automatically by an automatic document feeder. In addition, in consideration of the cost of the bill authenticity determination device, it has been described with a commercially available PC and an optical image reading device, but in order to increase the authenticity determination speed, bill automatic feed, bill surface state reading, for authenticity determination, Special hardware may be provided. In particular, in the case of an optical image reading apparatus such as a two-dimensional CCD camera, the camera may be installed at a position where it can be read partially rather than the entire bill, such as the four corners and the central portion of FIG. Moreover, although it was set as the structure which reads the serial number of a banknote automatically, for example, if it inputs manually with external input devices, such as a keyboard connected to PC, efficiency will fall, but the cost of a banknote authenticity determination apparatus will fall further. Also, the bill specific information image data associated with the serial number is loaded into the PC from the bill specific information management server connected to the PC via the Internet, but distributed to banks and other institutions that handle bills. The unique information image data of banknotes may be captured from a medium such as a DVD. In that case, a new database is distributed each time a new banknote is manufactured. Furthermore, when old banknotes are collected from the market, it is also necessary to delete the banknote data collected from the database.

  It is almost impossible to counterfeit random features on the banknote surface, and it is possible to cope with ultra-precision counterfeit bills. Further, as long as the data registered at the time of bill manufacture is managed, the authenticity determination method may be disclosed to the public. Furthermore, a special apparatus is not required, and the customer and the store clerk can easily determine the authenticity. Furthermore, even when the banknotes are broken or dirty, it is possible to collate, and it is possible to cope with cutting out features and making counterfeit banknotes.

  Next, a second embodiment of the present invention will be described. In addition, the inventors of the present application, on the heat-sensitive recording surface of a prepaid card with a gray back surface, represented by a card storing value information, for example, a highway card or a passnet card, has characteristics unique to each card (control during manufacture). It has been confirmed by experiments that this feature is readable and can be used for authenticity determination.

  8 shows an anti-counterfeit prepaid card generation device 1100, and FIG. 9 shows an anti-counterfeit prepaid card 1110 generated by the anti-counterfeit prepaid card generation device 1100. An anti-counterfeit prepaid card generation device 1100 includes an image input unit 1101 that reads random irregularities forming a heat-sensitive recording surface in a first area of an anti-counterfeit prepaid card, and optically reflects reflected light when the prepaid card is irradiated with light. Read on. The forgery-preventing prepaid card generation device 1100 includes an image conversion unit 1102 that converts read image information into unique information, and includes a signal processing circuit that converts a signal from the image input unit 1101 into digital data and outputs the digital data. Are converted into digital data of a predetermined resolution (for example, 400 dpi) and a predetermined gradation (for example, 8-bit gray scale). The converted digital data may be further encrypted with a secret key. An anti-counterfeit prepaid card generation apparatus 1100 includes an image encoding unit 1103 that encodes unique information into a code such as a two-dimensional code (such as a QR code) or a density patch, and an encoded image printing unit 1104 that prints a code. It is equipped with.

  The image input unit 1101 may be, for example, a line illumination that scans the first area of the CCD line sensor and the prepaid card, or a combination of the CCD area sensor and illumination that irradiates the field of view of the CCD area sensor. The image conversion unit 1102 and the image encoding unit 1103 may be, for example, a dedicated signal processing circuit configured to include a microcomputer, a personal computer (PC), or both via respective input / output ports. May be connected to each other. The encoded image printing unit 1104 includes a print head and its control device.

  Next, registration of prepaid card unique information will be described.

  For example, when a prepaid card is sold (issued), the prepaid card unique information is read by a registration device 1300 as shown in FIG. 11 installed in the vending machine, and the read prepaid card unique information is encoded and encoded. The unique information of the prepaid card is recorded on the surface of the prepaid card.

  FIG. 11 is a side view of the registration apparatus 1300. The registration apparatus 1300 includes drive rollers 1301a and 1301b for feeding the prepaid card 1110 from the right side to the left side of the figure, guide rollers 1302a and 1302b for guiding the feed of the prepaid card 1110, and a prepaid card. The line light source 1303 that irradiates the surface of the 1110 in a line, the imaging lens 1304 that forms an image of the surface state of the prepaid card 1110 irradiated with the line light source 1303 on the CCD line sensor 1305, and the surface state of the prepaid card 1110 An image processing circuit that includes a CCD line sensor 1035 that converts light and shade into an electrical signal, reads the surface state as the prepaid card 1110 moves, and receives a line image input from the CCD line sensor 1305 (see FIG. (Not shown) Ized, via the bus is input to the computer (not shown), it is coded in accordance with a program stored in advance in the computer and printed on the surface of the prepaid card by the print head 1306 encoded code.

  That is, when the prepaid card 1110 is inserted into the registration device 1300 along an automatic feeding device (not shown) and its guide (not shown), the drawing is performed by the driving roller 1301b, the guide roller 1302b, and the guide (not shown). 11 is sent from the right side to the left side at a constant speed. The CCD line sensor 1305 and the image processing circuit (not shown) send images to a computer (not shown) every moment, and the computer cuts out and processes the unique information of a predetermined area of the prepaid card 1110. As a result, the surface state of the solid area of the prepaid card 1110, for example, the first area 1120 shown in FIG. 9 (in the case of 400 dpi, 32 × 32 dots and about 2 mm × about 2 mm), a predetermined resolution (400 dpi) and Scanned at a predetermined gradation (8-bit gray scale). Since the reading resolution is 400 dpi, the reading gradation is 8-bit gray scale, and the area to be read is 32 × 32 dots, the data size is 1024 bytes, and the gradation value (brightness value) of each pixel (dot) is It becomes an integer value within the range of 0-255. FIG. 5 shows an example of an image obtained by visualizing (contrast correction for easy viewing) the image represented by the data obtained by the above reading. The obtained image data undergoes processing such as compression, is encrypted with a secret key, and is converted into, for example, an encoded image 1140 as shown in FIG. The converted encoded image is printed by the thermal print head 1306 on the thermal surface on which, for example, the usage status of the prepaid card is printed. The encoded image 1140 to be printed is preferably an area different from the first area 1120 where the unique information of the prepaid card is read. Needless to say, the print head may be printed on the surface opposite to the first area, and the print head is adapted to the state of the print area.

  In this embodiment, a CCD line sensor is used to capture image data on a moving prepaid card.However, depending on the moving speed of the prepaid card, the brightness of the imaging lens, and the shutter speed, an area sensor (CCD, CMOS or the like may be used, and image data may be taken in a state where the prepaid card is stationary. In this case, the conditions of the brightness of the imaging lens and the shutter speed are eased.

  A prepaid card authenticity determination device 1200 shown in FIG. 10 includes a code image input unit 1201 that reads an encoded image of an anti-counterfeit prepaid card. When encrypted with a secret key, unique information (predetermined by a predetermined public key) is obtained. The composite image composite unit 1202, the first storage unit 1203, and the second area (including the first area and the first area) of the composite image composite unit 1202, the first storage unit 1203, A second region image input unit 1204 for reading random irregularities forming a heat-sensitive recording surface, an image conversion unit 1205 for converting into unique information (digital data with a predetermined resolution and a predetermined gradation), a second Of the unique information stored in the storage unit 1206 and the first storage unit 1203 and the second region stored in the second storage unit 1206, the same area as the first area An image collation unit 1207 that compares and collates the unique information while moving, and an authenticity determination unit 1208 that determines whether or not the individual information of the individual having a high correlation with the first region exists in the second region. I have. The input units 1201 and 1204 may be, for example, a line illumination that scans the second area of the CCD line sensor and the prepaid card, or may be a combination of the CCD area sensor and illumination that irradiates the field of view of the CCD area sensor. The subsequent processing may be a dedicated signal processing circuit including a microcomputer or a personal computer (PC), or both of them are connected via respective input / output ports. You may do with an apparatus.

  Next, the authenticity determination of the prepaid card will be described more specifically.

  For example, in an institution that handles prepaid cards such as amusement halls, tollgates on highways, and cash registers at retail stores, a flatbed scanner (Fig. 3) and a PC connected to the flatbed scanner (Fig. 4) (or A dedicated device having the same function is installed, and the authenticity of the prepaid card is determined according to the prepaid card authenticity determination program stored in advance in the PC. First, a bill is put on the flatbed scanner, and a prepaid card authenticity start command is output to the PC according to the instruction of the PC display on which the prepaid card authenticity determination program is activated (for example, the prepaid card appearing on the display). Click the authenticity start button with the mouse). As a result, the surface state of the area where the prepaid card unique information is supposed to be registered (in the case of 400 dpi, about 4 mm × about 4 mm at 64 × 64 dots) has a predetermined resolution (400 dpi) and a predetermined gradation (8-bit gray). The obtained image data is transferred from the scanner to the PC and stored in a storage device (for example, HDD) of the PC. Since the reading resolution is 400 dpi, the reading gradation is 8-bit gray scale, and the reference area to be read is 64 × 64 dots, the size of the image data is 4096 bytes, and the gradation value (brightness value) of each pixel (dot) ) Is an integer value in the range of 0-255. At the same time, the encoded image printed on the prepaid card is read, and when encrypted with the private key, it is decrypted with the public key to be paired. Decoded prepaid card unique information image data (first feature of about 2 mm × about 2 mm at 32 × 32 dots for 400 dpi) and prepaid card unique information image data stored previously (64 × 64 dots for 400 dpi) Compared with the second feature (about 4 mm × about 4 mm), it is verified whether or not the first feature is included in the second feature region. As in the first embodiment, the matching is performed using a method of determining with the maximum correlation value and the normalized score of the maximum correlation value.

  Although this embodiment does not describe the installation of the prepaid card in the flatbed scanner, it may be manually installed or automatically installed by an automatic feeder. Also, considering the cost of the prepaid card authenticity determination device, it was explained with a commercially available PC and PC flatbed scanner, but in order to increase the authenticity determination speed, prepaid card automatic feeding, prepaid card surface state reading, authenticity determination For this purpose, special hardware may be prepared. In this case, the surface state of the prepaid card may be read not only by the CCD line sensor but also by a digital camera provided with an area sensor. Further, it may be integrated with a device that reads the magnetic record of the prepaid card, and the magnetic record information may be validated only when it is determined that the prepaid card is authentic.

  Since it is almost impossible to counterfeit random features on the surface of the prepaid card, the prepaid card counterfeit countermeasure according to the present invention is strong. In addition, since it is not necessary to store information in a server or the like, communication time and cost can be reduced. Further, a special device is not required, and an inexpensive device can be used for authenticity determination in a short time. It can be carried out.

It is a block diagram of a bill information registration device. It is the figure which showed the area | region of the reading object in a banknote. It is the figure which showed the specific example of the banknote characteristic image input part. It is the figure which showed the other specific example of the banknote characteristic image input part. It is a block diagram of a registration apparatus. It is a figure which shows an example of the image which visualized the image which the data obtained by reading the predetermined area | region of a banknote represents. It is a block diagram of an authenticity determination apparatus. It is a block diagram of a forgery prevention prepaid card generation device. It is a figure which shows a forgery prevention prepaid card. It is a block diagram of the authenticity determination apparatus of a prepaid card. It is a block diagram of a registration apparatus. Image represented by data obtained by prepaid card reading

Explanation of symbols

100 banknote information registration device (banknote surface feature registration device)
300 Registration device (Bill surface feature registration device)
400 authenticity determination device (banknote authenticity determination device)
1100 Counterfeit prevention prepaid card generation device (card printing device)
1110 Anti-counterfeit prepaid card (card)
1200 Prepaid card authenticity determination device (card authenticity determination device)
1300 Registration device (card printing device)

Claims (19)

An acquisition means for acquiring surface features at a plurality of locations registered in advance of a bill to be authenticated;
Reading means for reading surface features of a plurality of locations of the banknote;
A determination means for determining the authenticity of the banknote based on the acquired surface features of the plurality of locations and the read surface features of the plurality of locations;
A bill authenticity determination device comprising:   The bill authenticity determination apparatus according to claim 1, wherein the acquisition unit receives information on surface features of the plurality of locations. The number of the plurality of locations for reading the surface feature of the bill by the reading means is less than the number of candidate locations for reading the surface feature of the bill,
The bill authenticity determination device according to claim 1, wherein the reading unit reads a surface feature of the bill at random from the candidate locations.   The bill authenticity determination device according to any one of claims 1 to 3, wherein information on surface features of a plurality of locations of the bill is registered in an encrypted state.   5. The bill authenticity determination device according to claim 1, wherein an area of the portion read by the reading unit is larger than an area of a pre-registered surface feature of the bill. . Reading means for reading the surface features of a plurality of locations of the banknotes;
Registration means for registering surface features of a plurality of locations of the banknotes read by the reading means;
A banknote surface feature registration device.   The banknote surface feature registration apparatus according to claim 6, wherein the registration unit registers the surface feature in an encrypted state. The bill authenticity determination device according to any one of claims 1 to 5,
The bill surface feature registration device according to claim 6 or 7,
Bill authenticity determination system. Acquiring a plurality of pre-registered surface features of a banknote subject to authentication;
Reading the surface features of multiple locations of the banknote;
Determining the authenticity of the banknote based on the acquired surface features of the plurality of locations and the read surface features of the plurality of locations;
A bill authenticity determination method comprising: Reading the surface features of multiple locations on the bill;
Registering surface features of a plurality of the read bills;
A bill surface feature registration method comprising: Reading means for reading a surface feature of a predetermined portion of the card for storing the value information;
Printing means for printing the read surface feature information of the predetermined location at a location other than the predetermined location of the card;
Card printing device with   The card printing apparatus according to claim 11, wherein the printing unit prints the surface feature information when the card is issued.   The card printing apparatus according to claim 11, wherein the printing unit prints the surface feature information in an encrypted state.   A card for storing value information in which surface feature information at a predetermined location is printed at a location other than the predetermined location. Reading means for reading a predetermined portion of the card for storing the value information and a portion other than the predetermined portion;
Determination means for determining the authenticity of the card based on the read predetermined location and information on locations other than the predetermined location;
A card authenticity determination device with   16. The card authenticity determination device according to claim 15, wherein when reading the predetermined portion, the reading unit reads an area including the predetermined portion and larger than the predetermined portion. A card printer according to any one of claims 11 to 13,
A card authenticity determination device according to claim 15 or 16, and
Card authenticity determination system equipped with. Reading a surface feature of a predetermined portion of the card storing value information;
Printing the read surface feature information of the predetermined location at a location other than the predetermined location of the card;
A card printing method comprising: Reading a predetermined portion of the card storing the value information and a portion other than the predetermined portion;
Determining the authenticity of the card based on the read predetermined location and information on locations other than the predetermined location;
A card authenticity determination method comprising: