EP1589494A1 - Lesegerät für einen Sicherheitsfaden - Google Patents

Lesegerät für einen Sicherheitsfaden Download PDF

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Publication number
EP1589494A1
EP1589494A1 EP05251891A EP05251891A EP1589494A1 EP 1589494 A1 EP1589494 A1 EP 1589494A1 EP 05251891 A EP05251891 A EP 05251891A EP 05251891 A EP05251891 A EP 05251891A EP 1589494 A1 EP1589494 A1 EP 1589494A1
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EP
European Patent Office
Prior art keywords
security thread
document
magnetic field
banknote
reader according
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP05251891A
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English (en)
French (fr)
Inventor
Ezio Panzeri
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Individual
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Individual
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Filing date
Publication date
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Publication of EP1589494A1 publication Critical patent/EP1589494A1/de
Withdrawn legal-status Critical Current

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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
    • G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • 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 security thread reader and a method of detecting a security thread within a document. More particularly, this invention relates to a security thread reader and a method for detecting the presence of a security thread in a document in which the security thread has one or more regions of magnetic material and one or more optically visible markings.
  • the Euro banknote includes several security features, which taken in combination form a significant impediment to a counterfeiter in producing an identical copy of an authentic banknote.
  • the Euro banknotes are printed on a pure cotton paper, giving them a unique feel when handled. Some areas on the face of the banknotes are printed in relief so that they can be identified by touch.
  • the Euro banknote provides a watermark, the watermark more particularly including a picture and characters indicative of the value of the banknote, which is visible when the banknote is held between the viewer and a light source.
  • the Euro banknote also includes a security thread, which is visible, again visible when the banknote is held between the viewer and a light source, as a dark line running between opposite edges of the banknote.
  • Certain denominations of Euro currency also provide a foil hologram patch which shows a particular motif and the value of the banknote when the banknote is tilted, and a colour-shifting ink which causes the value numerals printed on the banknote to change colour when the banknote is tilted.
  • Security threads may be incorporated into a paper substrate of the banknotes during the manufacturing process.
  • a security thread is manufactured by forming a metal layer of aluminium on a polyester substrate, and then stripping off or by demetallising some parts of the aluminium to form recessed characters or negative transparent scripts. These scripts are readable by visually inspecting the banknotes when held in front of a backlight.
  • An alternative format of security thread may be provided using an insulator-metal transition (IMT) process by which a combination of magnetic and metallic materials can be deposited on a discontinuous basis.
  • IMT insulator-metal transition
  • One aspect of the invention provides a security thread reader for detecting the presence of a security thread in a document, the security thread having one or more regions of magnetic material and one or more optically visible markings, the security thread reader comprising:
  • the security thread itself may be relatively narrow compared to the dimensions of the document itself. Accordingly, the markings or script provided on the security thread may also be relatively small, which in turn requires the optical resolution of an optical reader arranged to discern the markings or script present on the security thread to be relatively high.
  • the invention recognises that a high resolution image generated for the entire document, which will generally be required where optical techniques are being used to detect the presence of a security thread within a banknote, may comprise a disadvantageously large quantity of data. The need to handle this large quantity of image data would be likely to result in higher data storage and image processing demands and/or slower operation. For instance, a larger image data buffer may be required to store the image data while image processing takes place, and the image processor may require increased processing power to perform the necessary image processing on the large volume of data.
  • the invention further recognises that there may be other markings present on the non security thread portions of the document which may confuse the image processor, resulting in inaccurate or spurious results. Accordingly, it is desirable to constrain the operation of the processor to the area of the security thread to improve reliability.
  • the reduction in size of the area to be scanned also enables the use of smaller, lighter, simpler and potentially cheaper scan heads of the optical scanner.
  • the type of document to which the present invention is applicable may be any document having a security thread
  • the present invention is particularly advantageous when applied to banknotes having a security thread.
  • the methods described herein could be applied to currency counting machines, vending machines, ticket machines or paying-in cashpoints.
  • a magnetic field detector capable of magnetically scanning a document for a magnetic thread in which the magnetic field detector remains static relative to the document, preferably either or both of the magnetic field detector and the document are moved relative to the other during the magnetic scanning operation. This enables one or more smaller, lighter, simpler and potentially cheaper sensors to be provided and positioned close to the document enabling weaker magnetic activity to be observed.
  • an optical scanner capable of optically scanning a document in which the optical scanner remains static relative to the document, such as a large scale Charge Couple Device (CCD) arrangement
  • CCD Charge Couple Device
  • an anti-stringing mechanism in which if the relative motion between either of the magnetic field detector or the optical scanner and the document is reversed then a transaction associated with the document is cancelled.
  • the reversal in relative motion may cause, and be detected as a result of, a second detection of the security thread by the magnetic field detector.
  • the image processor can detect the reversal of relative motion by detecting the inversion of the optically visible markings. Whichever method is used to detect the reversal of relative motion, a user will be unable to retract a document from the security thread reader without invalidating the transaction.
  • quantities such as the length, thickness and magnetic strength of the security thread can be measured by the magnetic field detector. For instance, a magnetic thickness value indicative of the cross sectional dimensional characteristics of the security thread can be ascertained, the magnetic thickness value being determined as a function of the signal amplitude of the magnetic field detector. While it can be appreciated that various types of magnetic field detector may be suitable for use with the present invention, preferably the magnetic field detector comprises one or more Hall-effect sensors. Hall-effect sensors are particularly suitable due to their small size, low cost and high sensitivity.
  • the one or more regions of magnetic material may include one or more of several different types of magnetic material, including ferromagnetic material.
  • the optical scanner should include a light emitting element for emitting light and a light receiving element for receiving light, the light emitted from the light emitting element being transmitted through the document before being received by the light receiving element.
  • the light emitting element should preferably provide substantially coherent light, for instance laser light. Whilst this laser light feature is preferred, it is not essential.
  • image processing operations may be suitable for identifying the optically visible markings.
  • the image processor may comprise an optical character recognition (OCR) function for this purpose.
  • OCR optical character recognition
  • the image processor may comprise a pattern matching function.
  • Another aspect of the invention provides a method of detecting the presence of a security thread in a document, the security thread having one or more regions of magnetic material and one or more optically visible markings, the method comprising the steps of:
  • the banknote 10 is provided with a security thread 20 which crosses from an edge 30 of the banknote 10 to an opposite edge 40 of the banknote 10.
  • the security thread 20 crosses the shortest dimension of the banknote 10, although the embodiments of the invention described hereinafter may be adapted to operate on banknotes having an alternative security thread position, such as a thread running from an edge 50 to an edge 60.
  • the security thread 20 may be fixed to a surface of the banknote 10, or more preferably may be either wholly or partially embedded within the banknote 10.
  • the security thread 20 may be constructed in a number of ways and consist of a number of different materials, including at least some magnetic material.
  • the magnetic material may exhibit any type of magnetism that either generates a sufficiently strong magnetic field to be detected (either without an external influence, or with an external influence such as an electric field or another magnetic field) or which perturbs an external magnetic field sufficiently for the perturbation of the external magnetic field to be detected.
  • Figure 1 further illustrates an expanded view of the security thread 20.
  • the example security thread 20 shown is exemplary of that which is visible on a 20 Euro note. It can be seen that the security thread 20 is provided with the markings "EURO 20". A left-to-right mirror image of this marking is also provided such that the marking "EURO 20" can be recognised when the banknote 10 is held up in front of a light source irrespective of the face of the banknote 10 being viewed.
  • the security thread 20 illustrated is relatively difficult to counterfeit at least partly due to the level of detail provided in the markings on the security thread 20.
  • the functional arrangement of a security thread reader 100 is schematically illustrated in the block diagram of Figure 2.
  • the security thread reader 100 comprises a magnetic field detector 110 and an optical scanner 140.
  • the magnetic field detector 110 performs the function of locating the security thread 20 within a banknote 10.
  • the magnetic field detector 110 will produce a characteristic analog output signal in the presence of the magnetic material present within the security thread 20.
  • An analog-to-digital converter 120 is provided to convert the analog output signal generated by the magnetic field detector 110 into a corresponding digital signal. This corresponding digital signal will be passed to a processor 170 via an input/output device 130.
  • the processor 170 includes decision logic 180, which may be either hardware or software based and which uses the digitised output signal from the magnetic field detector to determine whether a security thread is present within the banknote 10, and if it is so present then to determine its location on the banknote 10.
  • the decision logic 180 will use this determined position to control optical scanning and image processing functions of the security thread reader 100.
  • the decision logic 180 may comprise a database of characteristic signals which can be compared to the detected magnetic signals to determine whether the detected magnetic signal meets matches one or more stored magnetic signals. The result of this comparison can be used to assist in determining the presence of the security thread 20 and potentially to determine the nature, for instance type or denomination, of the banknote 10.
  • the optical scanner 140 performs the function of optically scanning the banknote 10, and in particular the security thread 20 within the banknote 10, to generate a digital image. If the optical scanner provided were to provide an analog rather than a digital output, an analog-to-digital converter would be provided to digitise the analog output.
  • the digital output data is then passed to an image buffer 160 via an input/output device 150.
  • the image buffer 160 will store image data corresponding to at least a portion of the banknote 10.
  • the image data within the image buffer 160 is available to the processor 170.
  • the processor 170 In order to detect optically visible markings which include character data, such as text, the processor 170 also includes an optical character recognition (OCR) module 190 which can identify the presence of the character data within the image data stored in the image buffer 160.
  • OCR optical character recognition
  • a pattern recognition module may be provided instead of the OCR module to determine the presence of predetermined markings within the image data stored in the image buffer 160. In either case the markings can be compared against a database of markings and/or criteria in order to identify the authenticity and characteristics such as the type or denomination of the banknote 10.
  • the optical scanner 140 may be a single head or multi-head scanner and may for instance comprise a CMOS array, and may user either non-coherent or coherent light, such as laser light.
  • CMOS array complementary metal-oxide-semiconductor array
  • the use of laser light in an optical scanner is particularly advantageous where a high-resolution image is required.
  • the processor 170 acts as a controller to control the operation of the optical scanner 140 and the image processing functions of the processor 170. Specifically, the processor 170 will ensure that an image area to be processed includes the security thread 20. Preferably, areas of the banknote 10 remote from the security thread 20 will not be processed, resulting in a reduction in the data handling requirements of the security thread reader 100.
  • the security thread reader 100 Four main arrangements of the security thread reader 100 are envisaged, although alternative arrangements are also envisaged.
  • FIG 3 schematically illustrates the relative motion of a magnetic field detector 210 across the banknote 10 of Figure 1.
  • the four edges of the banknote 10 are labelled as edges 30, 40, 50 and 60.
  • the magnetic field detector 210 passes across the face of the banknote 10 from the edge 50 towards the edge 60 in the direction of the arrows.
  • the magnetic field detector 210 passes across the banknote 10 from the edge 60 to the edge 50. It will be appreciated that the motion of the magnetic field detected 210 is relative motion with respect to the banknote 10.
  • Embodiments in which the banknote 10 is stationary and the magnetic field detector 210 is in motion and alternative embodiments in which the magnetic field detector 210 is stationary and the banknote 10 is in motion are equally valid, and each have their own advantages depending on the particular application to which the apparatus is being applied. Additionally, other embodiments in which both the banknote 10 and the magnetic field detector 210 move can also be envisaged.
  • the magnetic field detector 210 could consist of only a single magnetic field detecting element, in the present embodiment an array of magnetic field detecting elements 210a, 210b, 210c and 210d make up the magnetic field detector 210.
  • an array of magnetic field detecting elements By providing an array of magnetic field detecting elements, a larger portion of the banknote 10 can be investigated without providing a single element with a longer and more complex scan path across the surface of the banknote 10.
  • the magnetic field detecting elements 210a, 210b, 210c and 210d may be either independent from each other, or could be connected in series or parallel.
  • the magnetic field detecting elements 210a, 210b, 210c and 210d may be used, in addition to detecting the presence of the security thread, to determine the length of the security thread, this length being compared with a database to identify the type and denomination of the banknote 10.
  • the particular method used to detect the presence of the magnetic material within the security thread 20 will depend at least in part on the nature of the magnetic material.
  • the magnetic field generated by the magnetic material may be observed directly using a magnetic sensor.
  • the magnetic field detector could also be provided with a magnetic field generator, with the generated magnetic field being continuously monitored for perturbations. In this way, the presence or movement of the magnetic material within the generated magnetic field would perturb the generated magnetic field in a characteristic way which would be recognised by the magnetic field detector.
  • the security thread 20 comprises magnetic material which provides a strong enough magnetic field for direct sensing of the magnetic field to be possible.
  • the presence of magnetic material in a security thread could be detected using resonant inductive circuits or capacitative circuits similar to those used in the reading heads of a tape recorder.
  • the magnetic material within the security thread 20 is detected using one or more Hall effect sensors.
  • Hall effect sensors comprise one or more semiconductor platelets in which an electric current is passed through from one edge to an opposite edge.
  • a Hall voltage is generated across the plate in a direction transverse to the current flow when an external magnetic field acts perpendicularly to the direction of the current through the semiconductor platelet.
  • the Hall voltage generated is dependent on the magnetic flux density perpendicular to the plane of the Hall plate.
  • the Hall plate and associated evaluation circuitry can be integrated onto a single silicon chip, for instance using CMOS technology to form a robust and compact sensor unit.
  • the magnetic field detector 210 comprises four magnetic field detecting elements 210a, 210b, 210c and 210d arranged during a magnetic scan operation in a line across the width of the banknote 10 from the edge 30 to the edge 40.
  • Each of the magnetic field detecting elements 210a, 210b, 210c and 210d comprises a hall effect sensor as described above.
  • the Hall voltage output V HALL from each of the elements 210a, 210b, 210c and 210d is monitored.
  • the magnetic field detecting elements 210a, 210b, 210c and 210d will generate a small residual voltage V 0 known as an offset voltage which is due to influences such as the structural properties and the temperature of the material.
  • the decision logic 180 described above with reference to Figure 2 is configured to consider the security thread 20 to be present only if the Hall voltage V HALL exceeds a predetermined threshold voltage V THRESH .
  • the decision voltage may also require the Hall voltage V HALL to exceed the threshold voltage V THRESH for at least a predetermined minimum distance of the banknote 10 to reduce the likelihood of false detection of the security thread 20 as a result of background electrical or magnetic fluctuations.
  • the lower portion of Figure 3 graphically illustrates the V HALL output signal as a function of the position of one of the magnetic field detecting elements 210a with respect to the banknote 10.
  • the V HALL output signal may differ from one element to another element as a result of, for example a discontinuity in the security thread 20 or demagnetisation of part of the magnetic material within the security thread 20.
  • the security thread reader 100 is initialised by specifying in advance a threshold voltage V THRESH and a minimum time period ⁇ for which the Hall voltage V HALL must exceed the threshold voltage V THRESH for the security thread 20 to be considered as present within the banknote 10.
  • the Current Position, CP along the scanning track of the magnetic field detecting elements 210a, 210b, 210c and 210d and a counter, t are both initialised to zero.
  • magnetic scanning of the banknote 10 commences and relative motion between the magnetic field detecting elements 210a, 210b, 210c and 210d begins, with the Current Position, CP of the magnetic field detecting elements 210a, 210b, 210c and 210d being incremented in accordance with the relative motion.
  • the measured Hall voltage V HALL of the magnetic field detecting elements 210a, 210b, 210c and 210d is compared to the threshold voltage V THRESH . If the Hall voltage V HALL is below the threshold voltage V THRESH then the scanning step S2 continues and no further action is taken. If the Hall voltage V HALL is above the threshold voltage V THRESH then it is considered that the security thread 20 may have been encountered and the process moves on to a step S4.
  • a counter is started and a counter value, t begins incrementing.
  • a variable STStart corresponding to a possible start position of the security thread 20, is set to the current position CP of the magnetic field detecting elements 210a, 210b, 210c and 210d.
  • step S5 the magnetic scan process continues and at a step S6 the Hall voltage V HALL is again compared to the threshold voltage V THRESH .
  • step S6 if the Hall voltage V HALL is above the threshold voltage V THRESH then the magnetic scan process continues and no further action is taken. If the Hall voltage V HALL is below the threshold voltage V THRESH then the process moves on to a step S7.
  • a variable STEnd corresponding to a possible end position of the security thread 20, is set to the current position CP of the magnetic field detecting elements 210a, 210b, 210c and 210d.
  • the frozen value of the counter value t is compared to the minimum time period ⁇ which was set earlier in the step S 1. If the counter value t is less than the minimum time period ⁇ then it is considered that the magnetic thread has not been detected and the process moves on to a step S9, where the counter value t is reset to zero. Following the step S9, the process returns back to the step S2 where the security thread reader continues to magnetically scan the banknote 10 for the security thread 20. However, if at the step S8 it is determined that the counter value t is greater than or equal to the minimum time period ⁇ then it is considered that the security thread 20 has been detected and that its location within the banknote 10 is now known. The process then moves on to a step S10, which is illustrated in Figure 4B.
  • time counter is used, it will be appreciated that because the time is simply a function of the distance moved by the magnetic field detecting elements 210a, 210b, 210c and 210d across the banknote 10, and because the relative motion is being tracked to identify the current position of elements 210a, 210b, 210c and 210d and thus the position of the security thread, this information could be used instead of the time counter.
  • an optical scan area is designated.
  • the optical scan area is set as a strip of the banknote 10 bounded by the edges 30 and 40 of the banknote and by the positions STStart and STEnd designated by the magnetic thread detection process in steps S1 to S9. This optical scan area should correspond to the position of the security thread 20 within the banknote 10.
  • step S11 the area designated in the step S10 is optically scanned to generate image data corresponding to the security thread 20 of the banknote 10.
  • the image data generated is stored to an image buffer in a step S12.
  • the buffered image data is processed using a technique such as optical character recognition (OCR) or pattern matching to identify the markings present on the security thread 20.
  • OCR optical character recognition
  • FIG. 5 schematically illustrates an embodiment of the invention in which an anti-stringing mechanism is provided.
  • the steps S1 to S13 as described above with reference to Figures 4A and 4B are carried out to obtain an identification of the markings present on a security thread 20 within a banknote 10.
  • this identification is used to determine the authenticity (and denomination) of the banknote 10. If the banknote 10 is determined not to be authentic, then the process moves on to step S 15 where the transaction is terminated. At this time the banknote 10 could either be returned to the user or confiscated.
  • the banknote reader comprising the security thread reader could conduct a predetermined course of action such as alerting the proprietor of the banknote reader that a potentially counterfeit banknote has been detected.
  • the process moves on substantially simultaneously to steps S16, S17 and S18.
  • the transaction is validated.
  • the banknote reader initiates storage of the banknote 10.
  • the magnetic field detecting elements 210a, 210b, 210c and 210d measure the magnetic flux from a portion of the banknote 10 at which they are currently located. Specifically, the magnetic field detecting elements 210a, 210b, 210c and 210d will be positioned such that the security thread 20 would need to pass by them in the event that the banknote were to be retracted from the banknote reader.
  • the magnetic scanning in the step S18 does not include system driven relative motion between the banknote and the magnetic field detecting elements 210a, 210b, 210c and 210d as was the case with steps S2 and S5 in Figure 4A.
  • Relative motion between the banknote 10 and the magnetic field detecting elements 210a, 210b, 210c and 210d in step S 18 will result only from a user retracting the banknote or from the banknote finally being stored into the banknote reader.
  • the security thread will not pass by the magnetic field detecting elements 210a, 210b, 210c and 210d because it will be travelling into rather than out of the banknote reader.
  • the measured Hall voltage V HALL of the magnetic field detecting elements 210a, 210b, 210c and 210d is compared to the threshold voltage V THRESH . If the Hall voltage V HALL is below the threshold voltage V THRESH then the scanning step S 19 continues and no further action is taken. If the Hall voltage V HALL is above the threshold voltage V THRESH then it is considered that the security thread 20 may have been encountered and the process moves on to a step S20. At the step S20 the magnetic scan process continues and at a step S21 the Hall voltage V HALL is again compared to the threshold voltage V THRESH .
  • step S21 if the Hall voltage V HALL is above the threshold voltage V THRESH then the magnetic scan process continues and no further action is taken. If the Hall voltage V HALL is below the threshold voltage V THRESH then it is considered that the security thread has been encountered and that stringing is therefore taking place. In this event the process will move on to the step S15 and the transaction will be terminated.
  • the steps S18 to S21 will continue until either the security thread 20 is detected and the transaction therefore invalidated or until the banknote has been finally stored after the step S 17. As such, it is not possible to retract the banknote without termination of the transaction occurring. In this way, the stringing problem identified above is addressed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
EP05251891A 2004-04-13 2005-03-24 Lesegerät für einen Sicherheitsfaden Withdrawn EP1589494A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0408223 2004-04-13
GB0408223A GB2413179A (en) 2004-04-13 2004-04-13 Security thread reader for detection of both magnetic material and optical markings

Publications (1)

Publication Number Publication Date
EP1589494A1 true EP1589494A1 (de) 2005-10-26

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620920A1 (de) * 2011-05-19 2013-07-31 GRG Banking Equipment Co., Ltd. Verfahren und system zur identifikation wertvoller dokumente
DE102016015545A1 (de) * 2016-12-27 2018-06-28 Giesecke+Devrient Currency Technology Gmbh Verfahren und Vorrichtung zum Detektieren eines Sicherheitsfadens in einem Wertdokument
WO2018121882A1 (de) * 2016-12-27 2018-07-05 Giesecke+Devrient Currency Technology Gmbh Verfahren und vorrichtung zum detektieren eines sicherheitsfadens in einem wertdokument

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EP0276814A2 (de) * 1987-01-27 1988-08-03 Rand McNally & Company System und Verfahren zur Gegenstandsprüfung
EP0507290A2 (de) * 1991-04-05 1992-10-07 MANTEGAZZA ANTONIO ARTI GRAFICHE S.r.l. Vorrichtung zum Erfassen von kodierten Bereichen, insbesondere zum Lesen von Formularen im allgemeinen
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EP1172773A1 (de) * 1999-04-20 2002-01-16 Fabrica Nacional De Moneda Y Timbre Apparat zum prüfen von sicherheitsdokumenten
DE10049431A1 (de) * 2000-10-06 2002-04-11 Giesecke & Devrient Gmbh Verfahren und Vorrichtung für die Bearbeitung von Banknoten

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Publication number Priority date Publication date Assignee Title
EP0276814A2 (de) * 1987-01-27 1988-08-03 Rand McNally & Company System und Verfahren zur Gegenstandsprüfung
EP0507290A2 (de) * 1991-04-05 1992-10-07 MANTEGAZZA ANTONIO ARTI GRAFICHE S.r.l. Vorrichtung zum Erfassen von kodierten Bereichen, insbesondere zum Lesen von Formularen im allgemeinen
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EP1172773A1 (de) * 1999-04-20 2002-01-16 Fabrica Nacional De Moneda Y Timbre Apparat zum prüfen von sicherheitsdokumenten
DE10049431A1 (de) * 2000-10-06 2002-04-11 Giesecke & Devrient Gmbh Verfahren und Vorrichtung für die Bearbeitung von Banknoten

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2620920A1 (de) * 2011-05-19 2013-07-31 GRG Banking Equipment Co., Ltd. Verfahren und system zur identifikation wertvoller dokumente
EP2620920A4 (de) * 2011-05-19 2014-02-26 Grg Banking Equipment Co Ltd Verfahren und system zur identifikation wertvoller dokumente
US9014458B2 (en) 2011-05-19 2015-04-21 Grg Banking Equipment Co., Ltd. Valuable document identification method and system
DE102016015545A1 (de) * 2016-12-27 2018-06-28 Giesecke+Devrient Currency Technology Gmbh Verfahren und Vorrichtung zum Detektieren eines Sicherheitsfadens in einem Wertdokument
WO2018121882A1 (de) * 2016-12-27 2018-07-05 Giesecke+Devrient Currency Technology Gmbh Verfahren und vorrichtung zum detektieren eines sicherheitsfadens in einem wertdokument
US10922913B2 (en) 2016-12-27 2021-02-16 Giesecke+Devrient Currency Technology Gmbh Method and apparatus for detecting a security thread in a value document
US11521451B2 (en) 2016-12-27 2022-12-06 Giesecke+Devrient Currency Technology Gmbh Method and apparatus for detecting a security thread in a value document

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