EP0537431A1 - Dispositif pour la reconnaissance optique de documents - Google Patents

Dispositif pour la reconnaissance optique de documents Download PDF

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Publication number
EP0537431A1
EP0537431A1 EP92113171A EP92113171A EP0537431A1 EP 0537431 A1 EP0537431 A1 EP 0537431A1 EP 92113171 A EP92113171 A EP 92113171A EP 92113171 A EP92113171 A EP 92113171A EP 0537431 A1 EP0537431 A1 EP 0537431A1
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EP
European Patent Office
Prior art keywords
light
light sources
document
sensor
plane
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
EP92113171A
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German (de)
English (en)
Other versions
EP0537431B1 (fr
Inventor
Ivo De Man
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.)
Mars Inc
Original Assignee
Landis and Gyr Bussiness Support AG
Mars Inc
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Application filed by Landis and Gyr Bussiness Support AG, Mars Inc filed Critical Landis and Gyr Bussiness Support AG
Publication of EP0537431A1 publication Critical patent/EP0537431A1/fr
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—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
    • G07D7/121—Apparatus characterised by sensor details
    • 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
    • G07D7/20—Testing patterns thereon

Definitions

  • the invention relates to a device for optical recognition of documents of the type mentioned in the preamble of claim 1.
  • Such devices for optically recognizing documents are used, for example, in banknote acceptors for optically recognizing banknotes.
  • a device for optically recognizing documents is known from US Pat. No. 4,319,137, which recognizes a printed sheet on the basis of printed features.
  • An elongated source of white light illuminates a narrow strip that extends across the sheet.
  • the light scattered from the sheet in the strip or shining through the sheet there is captured simultaneously by means of three photosensors arranged in a row.
  • Each photosensor only registers light from a narrow spectral range, e.g. B. in the color red, green or blue.
  • the photosensors transmit three electrical signals corresponding to the three colors to an evaluation device.
  • DE-PS 37 05 870 describes a device which can be used as a read head and which enables line-by-line scanning of a sheet.
  • the device has a row of photodiodes, to which a pair of mutually inclined light-emitting diodes is assigned. Each pair of LEDs illuminates the sheet in an area immediately in front of the associated photodiode.
  • a collimator is arranged in front of each photodiode and blocks all light that does not originate from the area of the sheet immediately in front of the photodiode.
  • the reading head produces a monochrome, rasterized image of a print pattern on the sheet.
  • EP-A 338 123 it is known from EP-A 338 123 to form the read head from a group of interchangeable modules arranged in parallel, which form the linear arrangement of photodiodes and Have light sources and optically scan the sheet in strips. Each module works in the light of a predetermined color and produces the signals for a rasterized monochrome image of the print pattern on the sheet.
  • a device for scanning a sheet with a single photosensor is known from CH-PS 573 634, a small circular area on the sheet being successively illuminated with individual light sources of different spectral color arranged at an angle to the sheet plane.
  • the only photosensor receives light in the respective spectral range, which is scattered into the photosensor perpendicular to the sheet plane. Moving the sheet after each cycle enables a narrow strip to be scanned on the sheet.
  • the light sources and the photosensors are arranged in relation to the sheet plane in such a way that no light directly reflected on the sheet surface reaches the photosensors.
  • the invention has for its object to provide an inexpensive device for optical recognition of documents, which enables a reliable detection of colored features on the sheet surface of the document.
  • 1 means a sheet-shaped document with a one-color or multi-colored printed characteristic pattern, as it is e.g. B. is known from banknotes.
  • a means of transport 2 transports the document 1 flat in a transport plane 3 through a device for recognizing documents 1. Outside the transport plane 3 are photosensitive elements, e.g. B. photosensors 4, whose optical axes are perpendicular to the transport plane 3 and define a single sensor plane 5 transverse to a transport direction 6 of the document 1.
  • the photosensors 4 form at least one equidistant row with one another in the sensor plane 5, the distance between the row of the photosensors 4 and the transport plane 3 being predetermined.
  • the photosensors 4 are set up to convert light 7 from a wide spectral range into electrical sensor signals S.
  • the spectral range includes, for example, wavelengths from 0.4 microns to 10 microns, as z. B. is the case with semiconductor photoelectric elements made of silicon.
  • the light 7 can e.g. B. scattered on document 1.
  • the photosensors 4 have an acceptance angle ⁇ , measured perpendicular to the sensor plane 5, for the incident light 7 and, as a result, measured in the transport direction 6, determine the width of an area 8 on the document 1 which essentially overlaps as a narrow strip transversely to the transport direction 6 the width of the document 1 extends. Since the transport means 2 transports the document 1 in the transport direction 6, the area 8 migrates over the entire document 1.
  • the area 8 is formed by at least one, but preferably two symmetrically arranged, light sources Luminous lines 9, 10 illuminated.
  • the optical axes of the light sources in a light line 9 or 10 determine a light level 11 or 12.
  • the light levels 11, 12 intersect at an angle ⁇ in the common intersection line between the transport level 3 and the sensor level 5, which acts as a bisecting plane between the two light levels 11 and 12 shares the angle ⁇ .
  • the light sources are arranged equidistantly in both luminous lines 9 and 10. Both light lines 9, 10 are at the same distance from the transport level 3 in the light level 11, 12 and are symmetrical to the sensor level 5.
  • the light sources of the two luminous lines 9, 10 together illuminate at least area 8.
  • the mean angle of incidence of a radiation from the light sources illuminating document 1 is ⁇ / 2 and is dimensioned such that no direct reflections get into photosensors 4 despite the surface structure of document 1 and on the other hand the sensitivity of the device to small variations in the distance of the documents 1 from the transport plane 3 is imperceptible. This is advantageous for reading crumpled documents 1.
  • a control unit 13 is connected to the light sources of the light levels 11, 12 by means of feed lines 14.
  • One signal line 15 each connects the photo sensors 4 and the feed device 13.
  • a control line 16 establishes a connection between the feed device 13 and a drive 17 of the transport means 2.
  • a signal output of the control unit 13 is connected to a data line 18 with a data input of an evaluation unit 19.
  • the control device 13 is set up to feed the light sources in the luminous lines 11 and 12 and to amplify and digitize the sensor signals S.
  • the control device 13 preferably enables the light sources to be switched on and off briefly by means of a built-in clock generator 20, the light sources, for example individually or in a cycle Z of work steps t predetermined by the clock generator 20 in groups, illuminate one after the other for a predetermined cycle time t and illuminate document 1 in area 8.
  • the cycle Z repeats, for example in the first step t1 the means of transport 2 shifts the document 1 by the width of the area 8.
  • the control device 13 has an input with an amplifier 13 ′ for each signal line 15, the gain factor of which can be set with an external signal, and is set up for digitizing the amplified, analog electrical sensor signals S.
  • the sensor signals S proportional to the light intensity of the light received by the photosensors 4 reach the input of the connected amplifier 13 'via each of the signal lines 15.
  • the control device 13 amplifies and digitizes the sensor signals S arriving at each work step t and passes them in digitized form as a group of numbers via the data line 18 to the evaluation unit 19.
  • the amplifiers 13 'can be Unit 19 receive setting variables generated, which serve as external signals for adjusting the gain factors.
  • the clock generator 20 controls the drive 17 of the transport means 2, for example in a first step t1 of the cycle Z the document 1 is moved in the transport direction 6 so that the photosensors 4 can scan a new area 8.
  • the evaluation unit 19 receives a predetermined number of groups of numbers characterizing the area 8. As soon as the document 1 has been scanned in the predetermined areas 8, the evaluation unit 19 can compare these groups of numbers with predetermined sample number groups, which are stored in the evaluation unit 19, and can decide whether to accept or return the document 1.
  • Optical means 21 can advantageously be arranged in the beam path in front of the photosensors 4 so that the light 7 scattered on document 1 is largely independent of the optical properties collect the photosensors 4 and feed them.
  • the optical means 21 are preferably inexpensive aspherical plastic lenses or a diffractive optically effective, holographic optical element which can be embossed in plastic.
  • polyesters, polycarbonates, etc. are suitable as plastics.
  • Additional light sources advantageously increase the discriminatory power of the device for optically recognizing documents 1, since not only the scattered light 7 serves as the only distinguishing feature, but also the transparency of the document 1 and / or the fluorescence of the dyes present on the document 1.
  • a further row of lights 22 can be arranged on the side of the document 1 facing away from the photosensors 4 in the sensor plane 5, the optical axes of the light sources of the row of lights 22 being aligned in the sensor plane 5 such that the area 8 on the side facing away from the photosensors 4 of document 1 is illuminated.
  • the light sources of the row of lights 22 are connected to the control device 13 via supply lines 23.
  • the clock generator 20 controls the switching on and off of the light sources of the light row 22 in additional work steps t.
  • the light 7 which shines through the document 1 is collected by the optical means 21 and fed to the photosensors 4.
  • a source of ultraviolet light a UV source 24, which extends over the entire width of the document 1, can be arranged parallel to the region 8 on the side of the document 1 which faces the photosensors 4. Of course, this UV source 24 must not hinder reception of the light 7 in the photosensor 4.
  • the UV source 24 is supplied with a line from the control device 13, which is not shown here, and is switched on and off in an additional work step t of the clock generator 20 during a predetermined cycle time.
  • beam optics 21 ', 21' ', 21' '' can concentrate the light emitted by the light sources on the area 8.
  • a plate 25, 25 ' forms the transport plane 3 (FIG. 1) and is part of a transport channel delimited by channel walls 26, in which the flatly spread document 1 is aligned parallel to the one channel wall 26 and can be displaced in the transport direction 6 .
  • the transport means 2 moves the document 1 through the sensor plane 5 under the row of photosensors 4, 4 '.
  • the two luminous lines 9 and 10 for illuminating the area 8 are arranged symmetrically to the sensor level 5. In the drawing, the light sources of the luminous lines 9, 10 are shown as dots.
  • the light lines 9, 10 and the light row 22 (FIG. 1) can extend over the entire width of the transport channel.
  • the optical axes of two adjacent light sources are the same light line 9 or 10 or Luminous row 22 are each spaced apart by a source distance A or A ', with the light sources of one luminescent line 9 preferably being displaced transversely to the transport direction 6 to improve the uniform illumination in relation to the light sources of the other luminescent line 10.
  • the light sources are divided into color groups, which differ in the spectrum of the emitted radiation. The radiation from the light sources of a color group encompasses a narrow, coherent spectral range.
  • light-emitting diodes 27, 28 are used as light sources, which are supplied with short-term current pulses which are substantially above an approved continuous limit current, since in this operating mode the light yield of the light-emitting diodes 27, 28 is correspondingly increased and the radiation nevertheless has a narrow spectral range .
  • a variety of color groups are available on the LEDs 27, 28 on the market.
  • the photosensors 4, 4 ' are also positioned equidistantly in their row, a sensor distance B being maintained between the optical axes of two adjacent photosensors 4, 4', but which is a multiple of the source distance A or A '.
  • An acceptance angle ⁇ of the photosensors 4, 4 ′ measured in the sensor plane 5 can be many times larger than the acceptance angle ⁇ .
  • the properties of the optical means 21 (FIG. 1) also determine the acceptance angle ⁇ .
  • the adjacent photosensors 4, 4 'receive light 7 from overlapping sections 29 of the area 8. The same point in the area 8 thus simultaneously sends light 7 into a plurality of photosensors 4, 4', the scattering power of this point, the scattering angle, the distance from the Photosensor 4 or 4 'etc. are different for each photosensor 4 or 4' and are weighted differently by the device in the photosensors 4, 4 '.
  • the extent to which the cutouts 29 overlap is determined by the acceptance angle ⁇ .
  • This device has the advantage that already in the photosensors 4, 4 'there is an analog signal processing dependent on the predetermined acceptance angles ⁇ and ⁇ , on the distances A and B, on the distribution of the light sources and on the color groups used, before the conversion into the electrical sensor signals S and their forwarding via the signal lines 15 to the control unit 13.
  • the acceptance angle ⁇ not only reduces the number of photosensors 4, 4 ′ necessary for recognizing document 1, but also the evaluation time required for recognizing document 1.
  • the mechanical requirements for a precise lateral alignment of the document 1 in the transport channel are lower without sacrificing the security of recognizing the documents 1.
  • the transmission properties of the document 1 can advantageously be influenced by a further series of photosensitive elements, e.g. B. photodetectors 30 are detected, which are arranged on the side of the document 1 facing away from the luminous lines 9, 10 in the sensor plane 5.
  • the row of photodetectors 30 in sensor plane 5 forms an image of the row of photosensors 4, 4 ′ that is mirrored at transport plane 3.
  • a window 31 Arranged in the plate 25, 25 ', at least in the region of the sensor plane 5, is a window 31 which is installed transversely across the width of the transport channel and is permeable to the radiation and which has the width of the region 8 in the transport direction 6.
  • the window 31 is made of a transparent material and is embedded flush in the plate 25, 25 'in order to avoid the accumulation of fibers and the like in the window 31.
  • the optical means 21, which bring about predetermined acceptance angles ⁇ ′, ⁇ ′ of the photodetectors 30, are preferably arranged between the window 31 and the photodetectors 30.
  • the window 31 and the optical Means 21 in front of the photodetectors 30 can be combined as a unit.
  • the signal lines 15 ' connect each photodetector 30 to the control device 13.
  • the electrical sensor signals S of the photodetectors 30 are processed in the control device 13 like those of the photosensors 4, 4' and supplement the group of numbers characterizing the area 8.
  • the row of photosensitive elements 4, 4 ', 30 is preferably shorter than the luminous lines 9, 10 and the luminous row 22, for example on both sides by half a sensor distance B. In the transport channel there is sufficient illumination of the area 8 even for the widest document 1 and the two outermost photosensitive elements 4, 4 ', 30 collect relevant data related to document 1.
  • the plate 25, 25 ' has two diffusing elements 32, which are covered with a diffuse white scattering medium (e.g. titanium dioxide) and which surround the window 31 in the transport channel.
  • the two scattering elements 32 scatter the light from the luminous lines 11, 12 diffusely into the photosensors 4, 4 '.
  • the measured values obtained from the scattering elements 32 make it possible to compensate for the sensitivity of the device which has changed as a result of aging effects or temperature fluctuations.
  • a whole cycle Z of the clock generator 20 (FIG. 1) is run through and the sensor signals S received from the two scattering elements 32 are stored in the evaluation unit 19 (FIG. 1) as standard number groups, which, for. B. serve as parameters for the gain of each amplifier 13 '( Figure 1) in the control unit 13.
  • the light sources illuminate not only the area 8 but also part of the plate 25, 25 'or the two scattering elements 32. Since when scanning document 1 the number groups with the corresponding standard number groups in the If the evaluation unit 19 is compared, the area-related proportions of the two illuminated scattering elements 32 and of the area 8 illuminated on the document 1 can be determined.
  • the scattering medium can be arranged on the window 31 as a scattering element 32.
  • the infrared light of the row of lights 22 reaches the photosensors 4, 4 'when measuring the document 1 in transmission through the diffuse scattering medium.
  • a predetermined number of radiation sources 33 are arranged in the light row 22 between the photodetectors 30, the optical axes of which lie in the sensor plane 5 and the area 8 on the side of the document 1 facing away from the light levels 11, 12 illuminate with perpendicularly incident radiation 34 when the radiation sources 33 are fed by the control device 13 via the supply lines 23.
  • the light 7 shining through the document 1 serves as a measure of the transparency of the document 1, is received by the photosensors 4, 4 'and converted into the sensor signals S.
  • the radiation sources 33 of the row of lights 22 installed between two adjacent photodetectors 30 can e.g. B. belong to the same color group, the radiation sources 33 advantageously generating infrared light, the radiation 34 of which is particularly suitable for measuring the transparency.
  • FIG. 3 shows the light line 9 with the light-emitting diodes 27 arranged at the source spacing A.
  • the light-emitting diodes 27 are hatched differently in the drawing according to their emission spectrum. If, for example, the light-emitting diodes 27 belong to the three color groups green, red, yellow, a green, a red and a yellow light-emitting diode 27 follow one another in a first period P1 of the light sources.
  • the subsequent periods P in turn each include a green, one red and one yellow LED 27.
  • the light-emitting diodes 27, 28 (FIG. 2) of the same color group in the two light rows 9, 10 (FIG. 2) are advantageously supplied with energy simultaneously, so that the region 8 (FIG. 2) is illuminated uniformly in the predetermined color.
  • FIG. 4 shows the light line 9 as an example, the light-emitting diodes 27 of which belong to the color groups infrared, red, yellow or green.
  • the arrangement of the light-emitting diodes 27 of the different color groups in the light line 9 is selected such that the light-weaker light-emitting diodes 27 marked with oblique hatching in the drawing occur correspondingly more frequently in the light line 9 in order to illuminate the area 8 with the same intensity by each color group ensure.
  • the green light-emitting diodes 27 are less bright than yellow, red or infrared with the same power consumption.
  • the green light-emitting diodes 27 with the oblique hatching are arranged between two different light-emitting diodes 27 from the three other color groups.
  • the first period P1 of the light emitting diodes 27 comprises z. B. the colors infrared-green-yellow-green-red-green, which are followed by the next similar periods P.
  • the periods P of the light lines 9, 10 or light line 22 can be out of phase with one another.
  • the beam optics 21 ' is advantageously arranged between the light-emitting diodes 27 and the plate 25, which causes a uniform distribution of the light intensity in the area 8 (FIG. 1) of document 1, although the light is generated with many almost point-shaped light sources of the same color group.
  • the optically diffractive element is preferably used as beam optics 21 ', since its optical properties, which depend on the wavelength of the light beams 35, can be optimally adapted to the spatial distribution of the light-emitting diodes 27 of the different color groups.
  • FIG. 5 shows in connection with FIG. 1 a temporal course of the supply voltage Uesp on the control line 16, the supply voltages U1 to U3 on the supply lines 14 or supply lines 23 and the sensor signal S on one of the signal lines 15, 15 '(FIG. 2 ).
  • the drive 17 for moving the document 1 is switched on, in the following three steps t of the cycle Z the supply voltages U 1 to U 3 are emitted to the light sources of the three color groups in a staggered manner.
  • the next cycle Z then follows.
  • the sensor signal S follows the intensity of the light 7, the relative height H of the sensor signal S being dependent on the local reflectivity or transmission of the document 1 in the light of the respective color group.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Image Input (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Character Input (AREA)
EP92113171A 1991-10-14 1992-08-03 Dispositif pour la reconnaissance optique de documents Expired - Lifetime EP0537431B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH300591 1991-10-14
CH3005/91 1991-10-14

Publications (2)

Publication Number Publication Date
EP0537431A1 true EP0537431A1 (fr) 1993-04-21
EP0537431B1 EP0537431B1 (fr) 1997-05-28

Family

ID=4246491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113171A Expired - Lifetime EP0537431B1 (fr) 1991-10-14 1992-08-03 Dispositif pour la reconnaissance optique de documents

Country Status (8)

Country Link
US (2) US5304813A (fr)
EP (1) EP0537431B1 (fr)
JP (1) JP3152372B2 (fr)
DE (1) DE59208542D1 (fr)
ES (1) ES2103330T3 (fr)
FI (1) FI924620A (fr)
HK (1) HK1007019A1 (fr)
NO (1) NO923966L (fr)

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EP0622762A2 (fr) * 1993-04-27 1994-11-02 The Furukawa Electric Co., Ltd. Dispositif pour la détection de fluorescence
WO1995019019A2 (fr) * 1994-01-04 1995-07-13 Mars, Incorporated Detection de faux, notamment de faux billets de banque
WO1997001155A1 (fr) * 1995-06-20 1997-01-09 Bellcon I/S Procede de verification des billets de banque, particulierement de dollars, et equipement pour la mise en ×uvre du procede
EP0926635A1 (fr) 1997-12-10 1999-06-30 Mars, Incorporated Dispositif et procédé pour la mesure photoélectrique et validation de billets de banque
US5918960A (en) * 1994-01-04 1999-07-06 Mars Incorporated Detection of counterfeit objects, for instance counterfeit banknotes
WO2000010138A1 (fr) 1998-08-14 2000-02-24 Mars, Incorporated Procede et appareil de validation de pieces monnaie
WO2000062237A2 (fr) * 1999-04-08 2000-10-19 Ovd Kinegram Ag Dispositif de lecture pour bande d'information comportant une information codee optiquement
DE19930651A1 (de) * 1999-07-02 2001-01-11 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zum Lesen blattförmiger Aufzeichnungsträger
DE10005514A1 (de) * 2000-02-07 2001-08-09 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zur Überprüfung von Banknoten
EP1894724A2 (fr) 2006-09-04 2008-03-05 Mitsubishi Heavy Industries, Ltd. Détecteur de ligne et presse d'impression
EP1337977B1 (fr) * 2000-11-29 2008-04-30 De La Rue International Limited Procede et dispositif optiques d'inspection de documents
WO2008067889A1 (fr) * 2006-11-13 2008-06-12 3R Machines Bv Dispositif pour identifier et analyser un symbole de sécurité constitué de couleurs dans les longueurs d'ondes spectrales et infrarouges
DE102007037923A1 (de) * 2007-08-10 2009-02-12 Giesecke & Devrient Gmbh Optischer Sensor zur Erfassung von Wertdokumenten und Verfahren zur Reinhaltung eines Sensorfensters des Sensors
CN101976477A (zh) * 2010-10-25 2011-02-16 深圳市怡化电脑有限公司 多光谱多角度检测光变油墨和全息图像的鉴伪方法及装置
US7969565B2 (en) 2005-07-08 2011-06-28 Koenig & Bauer Aktiengesellschaft Device for inspecting a surface
CN110458998A (zh) * 2019-07-11 2019-11-15 深圳怡化电脑股份有限公司 票据检测方法、票据检测装置及终端

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US5992601A (en) * 1996-02-15 1999-11-30 Cummins-Allison Corp. Method and apparatus for document identification and authentication
DE59208542D1 (de) * 1991-10-14 1997-07-03 Mars Inc Einrichtung zum optischen Erkennen von Dokumenten
US6866134B2 (en) * 1992-05-19 2005-03-15 Cummins-Allison Corp. Method and apparatus for document processing
GB2291705A (en) * 1994-07-12 1996-01-31 Mars Inc Detection of counterfeit bank notes
US6915893B2 (en) * 2001-04-18 2005-07-12 Cummins-Alliston Corp. Method and apparatus for discriminating and counting documents
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US6363164B1 (en) 1996-05-13 2002-03-26 Cummins-Allison Corp. Automated document processing system using full image scanning
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US6748101B1 (en) 1995-05-02 2004-06-08 Cummins-Allison Corp. Automatic currency processing system
CA2175261A1 (fr) * 1995-05-24 1996-11-25 Jonathan Burrell Verification de l'authenticite de documents de securite
GB9510678D0 (en) * 1995-05-25 1995-07-19 At & T Global Inf Solution Method and apparatus for authenticating documents
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WO2000010138A1 (fr) 1998-08-14 2000-02-24 Mars, Incorporated Procede et appareil de validation de pieces monnaie
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EP1337977B1 (fr) * 2000-11-29 2008-04-30 De La Rue International Limited Procede et dispositif optiques d'inspection de documents
US7969565B2 (en) 2005-07-08 2011-06-28 Koenig & Bauer Aktiengesellschaft Device for inspecting a surface
EP1894724A2 (fr) 2006-09-04 2008-03-05 Mitsubishi Heavy Industries, Ltd. Détecteur de ligne et presse d'impression
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WO2008067889A1 (fr) * 2006-11-13 2008-06-12 3R Machines Bv Dispositif pour identifier et analyser un symbole de sécurité constitué de couleurs dans les longueurs d'ondes spectrales et infrarouges
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CN101976477A (zh) * 2010-10-25 2011-02-16 深圳市怡化电脑有限公司 多光谱多角度检测光变油墨和全息图像的鉴伪方法及装置
CN110458998A (zh) * 2019-07-11 2019-11-15 深圳怡化电脑股份有限公司 票据检测方法、票据检测装置及终端
CN110458998B (zh) * 2019-07-11 2021-11-16 深圳怡化电脑股份有限公司 票据检测方法、票据检测装置及终端

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DE59208542D1 (de) 1997-07-03
FI924620A (fi) 1993-04-15
HK1007019A1 (en) 1999-03-26
EP0537431B1 (fr) 1997-05-28
JP3152372B2 (ja) 2001-04-03
ES2103330T3 (es) 1997-09-16
US5498879A (en) 1996-03-12
FI924620A0 (fi) 1992-10-13
NO923966L (no) 1993-04-15
JPH05282432A (ja) 1993-10-29
US5304813A (en) 1994-04-19
NO923966D0 (no) 1992-10-13

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