EP3210195A1 - Dispositif et procédé de vérification de documents de valeur, en particulier des billets de banque, et système de traitement de documents de valeur - Google Patents

Dispositif et procédé de vérification de documents de valeur, en particulier des billets de banque, et système de traitement de documents de valeur

Info

Publication number
EP3210195A1
EP3210195A1 EP15791248.6A EP15791248A EP3210195A1 EP 3210195 A1 EP3210195 A1 EP 3210195A1 EP 15791248 A EP15791248 A EP 15791248A EP 3210195 A1 EP3210195 A1 EP 3210195A1
Authority
EP
European Patent Office
Prior art keywords
electromagnetic radiation
radiation
sensor signals
spectral
sensor
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.)
Granted
Application number
EP15791248.6A
Other languages
German (de)
English (en)
Other versions
EP3210195B1 (fr
Inventor
Jörg Frankenberger
Thomas Giering
Wolfgang Rauscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
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.)
Filing date
Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3210195A1 publication Critical patent/EP3210195A1/fr
Application granted granted Critical
Publication of EP3210195B1 publication Critical patent/EP3210195B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • G07D7/1205—Testing spectral properties
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a device and a method for checking value documents, in particular banknotes, as well as a value-document processing system.
  • banknote processing systems characteristics of banknotes, such as banknotes, are determined.
  • Printed image, denomination, authenticity and condition, determined by physical properties of the banknotes detected by sensors and the sensor data generated here are evaluated.
  • When checking the banknotes often their remission and / or transmission properties are used.
  • a banknote is irradiated with the light of one or more light sources and the remitted from the banknote, i. diffused reflected or transmitted light detected by one or more sensors. Depending on the nature of the light sources used, the remissions determined in this way can be used.
  • Transmission curves deviate from the actual remission or transmission behavior of the banknote.
  • LEDs light-emitting diodes
  • artefacts which do not correspond to the actual characteristics of the banknote can occur in certain regions of the remission or transmission curves.
  • the device according to the invention for checking documents of value has: at least two radiation sources for the emission of electromagnetic radiation with which a value document is irradiated; at least one sensor for detecting the electromagnetic radiation emanating from the document of value, in particular directed by the document of value or diffusely reflected and / or transmitted, and generating corresponding sensor signals, components associated with the radiation sources; an evaluation device, which is designed to derive from the sensor signals generated by the at least one sensor, taking into account at least one spectral property of the electromagnetic radiation of the at least two radiation sources corrected sensor signals, wherein in deriving the corrected sensor signals at least one linear combination of the different radiation sources associated components of the sensor signals is formed.
  • the inventive method for checking value documents comprises the following steps: irradiation of a value document with electromagnetic radiation of at least two radiation sources; Detecting the electromagnetic radiation emanating from the value document, in particular directed by the value document or diffusely reflected and / or transmitted, and generating corresponding sensor signals, components associated with the radiation sources; Deriving corrected sensor signals from the sensor signals generated by the at least one sensor taking into account at least one spectral property of the electromagnetic radiation of the at least two radiation sources, wherein in the derivation of the corrected sensor signals at least one linear combination of the different radiation sources associated components of the sensor signals is formed.
  • the value-document processing system has at least one device for processing, in particular for conveying and / or counting and / or sorting, value documents, in particular banknotes, and is distinguished by the device according to the invention for checking value documents.
  • the invention is based on the idea that when detecting the reflected and / or transmitted light from the value document by means of sensors reflection or transmission signals, which together preferably represent a spectral reflection and / or transmission signal course to undergo a correction in which corrected reflection or transmission signals, which preferably together represent a corrected spectral reflection or transmission signal waveform, are obtained.
  • at least one spectral property of the electromagnetic radiation emitted by the at least two radiation sources is used.
  • the considered spectral property of the electromagnetic radiation may in this case relate to any property, in particular the intensity, of the electromagnetic radiation emitted by the radiation source at one or more wavelengths or in one or more wavelength ranges.
  • the considered spectral property of the electromagnetic radiation refers to a value for the radiation intensity of a radiation source in the range of a first wavelength of a main emission and to a corresponding value in the range of a second wavelength of a further emission, which is also known as is designated.
  • the considered spectral characteristic of the electromagnetic radiation refers to a value for the radiation intensity in the range of a first wavelength of a main emission and to several corresponding values in ranges of further wavelengths of further emissions, which are also referred to as secondary emissions.
  • the spectral property may also relate to a wavelength-dependent intensity profile of the electromagnetic radiation respectively emitted by the radiation sources in a broader wavelength range in which, in particular, the main emission and the secondary emission or the secondary emissions are included.
  • the spectral property of the electromagnetic radiation can be taken into account in the correction of the sensor signals according to the invention but also in the form of parameters which are described by the o.g. Properties, in particular the intensity values at certain wavelengths or in certain wavelength ranges are derived, such. Quotients, differences or sums from the mentioned intensity values.
  • the sequential illumination of the value document to be tested by the at least two light sources with main emissions in different wavelength ranges, the spectral property of at least one light source in the evaluation of the sensor signals are taken into account.
  • the corrected reflection or transmission signals agree substantially better with the actual remission or transmission behavior of the value document than without correction.
  • this will cher influence due to the nature of the light sources used in each case, such as LEDs, eliminated or at least reduced.
  • the invention thereby allows a much more accurate determination of the reflection and / or transmission properties of value documents.
  • the at least one spectral property of the electromagnetic radiation of the at least two radiation sources is given by at least one spectral distribution of the electromagnetic radiation of the at least two radiation sources.
  • the spectral distributions of the n radiation sources differ from each other.
  • the corrected sensor signals agree with the actual reflection intensity with even greater accuracy. Transmission profile of the value document match.
  • At least one spectral distribution of the electromagnetic radiation of the radiation sources is given by a first spectral distribution of the electromagnetic radiation emitted by the radiation sources and a second spectral distribution which is different from the first spectral distribution.
  • a first spectral distribution of the electromagnetic radiation emitted by the radiation source corresponds to a spectral distribution having a main and final emission and at least one secondary emission.
  • a second spectral Division preferably corresponds to the first spectral distribution, but without having the at least one secondary emission.
  • the first spectral distribution is preferably determined by a measurement, for example by means of a spectrometer, the radiation source or by means of associated data sheets.
  • the second spectral distribution can then be derived from the first spectral distribution by eliminating the side emission.
  • a particularly reliable and accurate correction of the sensor signals, in particular with regard to disturbing influences due to secondary emissions, can be achieved.
  • the corrected sensor signals are calculated by multiplying the generated sensor signals R by a correction matrix B.
  • the vector R is formed by the intensity values measured at a location in each case with the n radiation sources.
  • the correction matrix B has at least one non-diagonal element other than 0.
  • the correction matrix B By multiplying the sensor signals R by the correction matrix B, the influence of the spectral behavior of the radiation sources, in particular of secondary emissions, on the sensor signals can be corrected with particularly high accuracy.
  • the at least one spectral property of the electromagnetic radiation of the radiation sources is given by at least one parameter which has one or more spectral components, in particular the intensity, of the electromagnetic radiation of the radiation source, in particular at one or more wavelengths or Wavelength ranges, characterized.
  • the sensitivity of the respective sensor in particular in the case of the wavelengths or wavelength ranges mentioned, can additionally be taken into account in the parameter.
  • the parameter then preferably speaks a product of the intensity of the radiation emitted by a radiation source at a certain wavelength and the sensitivity of the respective sensor at this wavelength.
  • the at least one parameter can also be derived from two or more intensity values and possibly sensor sensitivity values at respectively different wavelengths, for example by quotient formation.
  • the relevant spectral properties of the radiation sources can be easily taken into account in the correction of the sensor signals, so that even with spectral reflection or transmission curves in a broad spectral range, eg between 400 and 1100 nm, relatively low computing capacities are sufficient to enable a correction of the sensor signals in real time.
  • At least one first parameter ai preferably characterizes the spectral component of a main emission of the electromagnetic radiation of the radiation source and at least one second parameter i the spectral component of an emission occurring in addition to the main emission, a so-called secondary emission, of the electromagnetic radiation of the radiation source. It is further preferred to design the evaluation device so that the corrected sensor signals from the sensor signals taking into account the first and second parameters ai and a 2 or a derived from the first and second parameters ai and a 2 parameter a, which in particular the quotient ai / az from the first and second parameters ai and ai, respectively.
  • correction parameter a can be obtained directly by measuring the spectral distribution of the light emitted from the radiation sources and the detector sensitivity. Alternatively, this can also be determined from the measured sensor signal R and the values n and r 2 obtained by spectrometer measurement on a calibration document
  • the corrected sensor signals are normalized based on corrected reference signals, the corrected reference signals being generated from reference signals generated by the at least one sensor during the detection of the electromagnetic radiation emanating from a reference document, a so-called white reference are derived, taking into account the at least one spectral property of the electromagnetic radiation of the at least two radiation sources.
  • the sensitivity of the at least one sensor for electromagnetic radiation in particular in the form of at least one spectral curve of the sensitivity, is preferably taken into account.
  • the corrected reference signals used in the normalization of the corrected sensor signals are therefore preferably corrected analogously to the sensor signals.
  • Fig. 4 examples of the emission of different light sources.
  • FIG. 1 shows an example of a schematic structure of a value document processing system 1 with an input tray 2, in which a stack of value documents to be processed, in particular banknotes 3, is provided, and a singler 8, from which the respectively lowest banknote of the input stack erf erf Asst and to a - reproduced only schematically in the selected representation - transport device 10 is passed, which conveys the bill in the transport direction T to a sensor device 20.
  • the sensor device 20 includes in the illustrated example - only highly schematically illustrated - light sources 24 and 25 for irradiating the bill with light, especially in the visible and / or infrared and / or ultraviolet spectral range, and a first, second and third sensor 21, 22 and 23, which is preferably designed as a so-called line camera and detects light emitted by the banknote, in particular in the visible and / or infrared and / or ultraviolet spectral range, by means of sensor elements arranged along a row and converts it into corresponding sensor signals.
  • light sources 24 and 25 preferably light emitting diodes (LEDs) are used. Although in the illustrated example two light sources 24 and 25 are indicated, it may be preferable to provide more than two light sources. Likewise, for the inventive method instead of LEDs any other light sources such as fluorescent lamps, flash lamps, (filtered) incandescent lamps or similar. be used.
  • the at least two light sources can also be realized by a light source in conjunction with at least one switchable filter, provided that at least two individually addressable, differing spectra are made available.
  • this constellation will continue to be described as two light sources or multiple light sources.
  • the sensor device 20 has a plurality of light sources which emit light in different spectral ranges.
  • the respective spectral regions of the light sources can be selected such that they together emit light in the spectral range in which the remission or transmission behavior of the banknote is to be tested.
  • This spectral range is preferably between about 350 and 1100 nm.
  • three LEDs can be combined, each emitting light in the ultraviolet, visible and near infrared spectral range.
  • the first and second sensors 21 and 22 detect light reflected from the front side or back side of the banknote, ie diffusely reflected, and / or directionally reflected light and convert this into corresponding sensor signals.
  • the third sensor 23 located in the region of the front side of the banknote detects the light emitted by a light source 24 and preferably obliquely striking the banknote and passing through it passing, ie transmitted, light and converts this into corresponding sensor signals.
  • the line with the sensor elements of the respective sensor 21, 22 or 23 is substantially perpendicular to the transport direction T of the banknotes, so that with each read operation of the sensor line of the respective sensor 21, 22 or 23, a sensor waveform along the sensor line is obtained, which corresponds to an intensity profile of the light, which is transmitted in a direction perpendicular to the transport direction T extending direction of the banknote or remittiert.
  • the sensor device 20 shown is preferably designed to check reflectance and / or transmission curves at different locations of a banknote.
  • a banknote For this purpose, in each case one point of the banknote is illuminated with light from one of the light sources 24, 25 at a specific wavelength ⁇ and the light remitted or transmitted by the banknote is detected with one of the sensors 21, 22 or 23 and converted into corresponding sensor signals.
  • These sensor signals are then preferably diverted in each case by a reference signal determined by means of a white reference, as a result of which a normalized remission or transmission value at the location of the banknote at the wavelength ⁇ is obtained.
  • the banknote is successively illuminated with light of different wavelengths and the respective remitted or transmitted light is detected.
  • several, up to (n-1) light sources can be active simultaneously.
  • the light sources 24 and 25 are clocked so fast that the banknote has hardly moved during a cycle in which all the different wavelengths are switched, in spite of the transport, so that for all different wavelengths are measured substantially at the same location of the banknote. In this way, not only one, possibly normalized, remission or transmission value but one, possibly normalized, remission or transmission curve is obtained for this point.
  • the sensor signals generated by the sensors 21 to 23 of the sensor device 20, in particular the corresponding remission or transmission curves, are forwarded to a control device 50 and an evaluation device 51.
  • the evaluation device 51 can be contained in the control device 50 or else form a separate unit from the control device 50.
  • the evaluation device (51) has a memory function for providing previously calculated correction parameters, which are used for the calculation of corrected sensor signals.
  • the sensor signals are used for checking the banknote, wherein statements about different properties of the respective banknote are derived from the respective sensor signals, such as authenticity, degree of soiling, wear, defects and the presence of Foreign objects, such as adhesive strips.
  • the transport device 10 and the points 11 and 12 along the transport path are controlled by the control device 50 such that the banknote is fed to one of a plurality of output compartments 30 and 31 and stored there. For example, banknotes that were recognized as genuine are deposited in a first output bin 30, while banknotes classified as counterfeit or counterfeit suspect are deposited in a second output bin 31.
  • banknote 13 By the reference numeral 13 at the end of the transport path shown should be indicated that more output compartments and / or other means, such as for storing or destroying banknotes, may be provided. If, for example, the check of a banknote shows that it is genuine but does not meet certain fitness criteria with respect to soiling, wear, defects or existing foreign objects, it can be sent directly to a shredder for destruction.
  • the value-document processing system 1 further comprises an input / output device 40 for inputting data and / or control commands by an operator, for example by means of a keyboard or a touchscreen, and outputting or displaying data and / or information about the processing process, in particular to the respectively processed banknotes.
  • the evaluation device 51 preferably uses corrected sensor signals, in particular corresponding corrected remission or transmission curves, for checking the banknote, which reflect the actual remission or transmission behavior of the banknote much more accurately than the uncorrected remission or transmission curves. This will be explained in more detail below.
  • FIG. 2 shows an uncorrected remission curve 15 obtained with the sensor device 20 in the spectral range between approximately 400 and 1050 nm in comparison with a remission curve 16 measured with a calibrated spectrometer, which reflects the actual remission behavior of the banknote considered.
  • the uncorrected remission curve 15 shows conspicuous artifacts, which in this example show jagged remission peaks at about 590 nm and about 650 nm.
  • reference signals which were determined on a white reference.
  • FIG. 3 shows a remission curve 17 corrected in the manner according to the invention in the spectral range between approximately 400 and 1050 nm in comparison with the remission curve 16 measured with a spectrometer.
  • the course of the corrected remission curve 17 is significantly better with the progression of FIG reflectance curve 16 measured with the spectrometer, as is the case with the uncorrected remission curve 15 (see FIG.
  • the spectral illumination distributions of LEDs correspond to laser-like Dirac functions at the respective wavelengths, ie they have a "needle-shaped" spectral intensity distribution of the emitted light around a nominal wavelength, but in practice this is often not the case
  • the spectral illumination distributions of real LEDs usually have a certain extent around the nominal wavelength, so that the remission spectrum is somewhat smoothed out.
  • This emission of light is also referred to in the context of the invention as
  • it has been found that some LEDs in addition to the main emission also show side emissions in completely different wavelength ranges, which change the shape of the remission curve surprisingly conspicuous and particularly disturbing.
  • Transmission curves is u.a. the finding that disturbing artifacts, in particular remission or transmission peaks by secondary emissions of the respective light sources, in particular LEDs, can be caused.
  • the preferred correction methods for computational elimination or at least reduction of these effects are explained in more detail below.
  • the original remission or transmission curves in the range of wavelengths of side emitting LEDs could be easily smoothed, e.g. with a moving average over three interpolation points. Although this smoothes the representation of the curves in a simple and fast manner, it may also generate new artifacts, especially in the case of highly structured remission or transmissive spectra with steep flanks.
  • the generated sensor signals for a remission curve with knowledge of the illumination distributions and the detector sensitivity distribution for all LEDs are simulated.
  • the sensor device 20 detects both the main and secondary emissions of the light sources 24, 25 or the remission or transmission caused thereby.
  • Sk () is the illumination distribution of channel k, i. the k th LED
  • D ( ⁇ ) the detector sensitivity, i. the sensitivity of the sensor
  • r () is the actual remission curve of the banknote.
  • the vector I is preferably normalized by a white balance. For this purpose is
  • the remission vector r with the discretization at m wavelengths either without secondary emissions with Ao is mapped to the (correct) sensor signals BR in the n radiation channels, or alternatively via the measurement with secondary emissions (R) and their subsequent correction via the correction matrix B.
  • n m
  • a + ⁇ is the inverse of matrix A.
  • a + which can also be called a generalized inverse
  • A is according to a mathematical definition in the present case if and only if:
  • the described correction method allows a reliable elimination or at least reduction of remission or transmission peaks due to secondary emissions of the light sources, so that these - especially in sensor and / or evaluation devices with sufficiently high computing power - can be used in an advantageous manner.
  • a spectral correction takes place under a change in the form of the remission spectrum.
  • This correction is dynamic, i.
  • the correction parameter depends not only on the systematic (static) alternating interference of the radiation source channels with each other, but also on the current measured values of the participating radiation source channels.
  • a reliable correction of the sensor signals can be carried out even with lower computing capacities in real time.
  • such LEDs are used, which each have at most one secondary emission, which is preferably close to a wavelength at which one or more of the respective other LEDs are available or stand, which in turn has preferably no secondary emission ,
  • the wavelength of the main emission of the other LED is shifted by less than 120nm from the wavelength of the side emission of the first LED, more preferably less than 50nm, even more preferably less than Onm, depending on the desired spectral response. len resolution of the transmission or remission curves and the number of light sources.
  • weighting factor ak If the remission is measured relative to a white reference, ie standardized by means of reference signals obtained on the basis of the white reference, then the weighting factor ak is shortened:
  • FIG. 4 shows by way of example the intensity I of the emission of two light sources 24, 24 '.
  • the second light source 24 ' is required having a main emission with a wavelength equal to or similar to the wavelength Xz of the side emission to be corrected the first light source 24 is.
  • a main emission at 570 nm it has been found that there is often a side emission at 850-870 nm.
  • a second LED is used, which has a main emission at about 850 nm.
  • a light source 24 has a main emission at a wavelength ⁇ and only a side emission at a second wavelength ⁇ , one obtains the quotient instead of the actual normalized remission value ri / wi
  • the unadulterated, i. actual, value ri / wi and the correction parameter a can thus be the corrected, i. actual, calculate value ri / wi of the normalized remission.
  • the correction parameter is preferably determined by two methods.
  • the " determined directly on the product of the measured spectral distributions of the light emission of the light source 24 with the measured sensitivity of the detector or the detectors at the wavelength ⁇ .
  • the intensities of the main and secondary emissions of the first light source 24 with the secondary emission and the detector sensitivities at the wavelengths ⁇ and ⁇ 2 must be measured.
  • the intensity of the further light source 24 'emitted with its main emission in the range of ⁇ 2 does not necessarily have to be measured.
  • no direct measurements of the intensities of the light sources or detector sensitivities are necessary.
  • the correction parameter a is calculated from the known quantities R (sensor signals, possibly normalized) and the actual remission n, n of a previously characterized test sample:
  • the actual reflectance of the test sample may be known using standard color charts or determined by direct measurement with a spectrometer on the test sample.
  • the test sample preferably has sufficiently high remission values of> 0.2, particularly preferably> 0.5, so that sufficiently high signal intensities and thus a sufficient accuracy in the determination of a is achieved.
  • the invention also encompasses the variants and embodiments set out below.
  • the spectral lighting contributions can not only originate from the main and secondary emissions of individual light sources, but also result from simultaneous illumination of the value document with at least two light sources with different spectral distribution.
  • correcting the remission or transmission curves correctly is made possible by the inventive correction of the sensor signals via the algorithm according to the invention.
  • LED A emits light in the UV range
  • LED B in the visible (VIS) or IR range. Then, the UV signal can be determined without requiring a single irradiation of the bill by the UV-LED.
  • the sensor device 20 is designed so that the banknote is always irradiated simultaneously with LEDs of different wavelength ranges. For example, you can illuminate the banknote simultaneously with the different overlays of LEDs A + B + C, LEDs A + B, and LEDs A + C successively.
  • the algorithm according to the invention can then be applied as described above if the spectra of the individual LED light emissions are used by the spectra of the k th combined LED overlays.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un dispositif, un procédé correspondant ainsi qu'un système de traitement de documents de valeur (1) destinés à vérifier des documents de valeur (3), en particulier des billets de banque, au moyen d'au moins deux sources de rayonnement (24, 25) destinées à émettre un rayonnement électromagnétique, au moyen duquel un document de valeur (3) est irradié, d'au moins un capteur (21 à 23) destiné à détecter le rayonnement électromagnétique provenant du document de valeur (3), en particulier réfléchi et/ou transmis par le document de valeur (3) et à générer des signaux correspondants et d'un dispositif d'évaluation (51) qui est adapté pour déduire des signaux corrigés à partir des signaux, avec prise en compte d'au moins une propriété spectrale du rayonnement électromagnétique des au moins deux sources de rayonnement (24, 25). Les signaux ainsi corrigés reproduisent le comportement de réflexion ou de transmission réel du document de valeur de façon sensiblement plus précise que les signaux non corrigés. En particulier, des artefacts de réflexion ou de transmission parasites qui peuvent être imputés à des émissions secondaires des sources de rayonnement (24, 25), notamment des LED, sont éliminés ou au moins réduits.
EP15791248.6A 2014-10-24 2015-10-23 Dispositif et procédé de vérification de documents de valeur, en particulier des billets de banque, et système de traitement de documents de valeur Active EP3210195B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014015746.6A DE102014015746A1 (de) 2014-10-24 2014-10-24 Vorrichtung und Verfahren zur Prüfung von Wertdokumenten, insbesondere Banknoten, sowie Wertdokumentbearbeitungssystem
PCT/EP2015/002120 WO2016062409A1 (fr) 2014-10-24 2015-10-23 Dispositif et procédé de vérification de documents de valeur, en particulier des billets de banque, et système de traitement de documents de valeur

Publications (2)

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EP3210195A1 true EP3210195A1 (fr) 2017-08-30
EP3210195B1 EP3210195B1 (fr) 2023-09-20

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US (1) US10109133B2 (fr)
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WO (1) WO2016062409A1 (fr)

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ES2511039T3 (es) * 2008-07-29 2014-10-22 Mei, Inc. Clasificación y discriminación de un elemento de moneda basándose en la respuesta espectral del elemento
DE102008064389A1 (de) * 2008-12-22 2010-06-24 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zur Erfassung optischer Eigenschaften eines Wertdokuments
US8358318B2 (en) * 2009-07-31 2013-01-22 Eastman Kodak Company Method for reproducing an image on an imaging device
DE102011016509A1 (de) 2011-04-08 2012-10-11 Giesecke & Devrient Gmbh Verfahren zur Prüfung von Wertdokumenten
JP5834584B2 (ja) * 2011-07-25 2015-12-24 ソニー株式会社 情報処理装置、情報処理方法、プログラム及び蛍光スペクトルの強度補正方法

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WO2016062409A1 (fr) 2016-04-28
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US10109133B2 (en) 2018-10-23
US20170309106A1 (en) 2017-10-26

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