EP2132719A1 - Method and device for verifying value documents - Google Patents
Method and device for verifying value documentsInfo
- Publication number
- EP2132719A1 EP2132719A1 EP08734898A EP08734898A EP2132719A1 EP 2132719 A1 EP2132719 A1 EP 2132719A1 EP 08734898 A EP08734898 A EP 08734898A EP 08734898 A EP08734898 A EP 08734898A EP 2132719 A1 EP2132719 A1 EP 2132719A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- feature
- value document
- determined
- difference
- value
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 73
- 238000007639 printing Methods 0.000 claims description 15
- 238000011156 evaluation Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 2
- 238000013213 extrapolation Methods 0.000 claims description 2
- 230000003466 anti-cipated effect Effects 0.000 abstract 1
- 238000012795 verification Methods 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- G07D7/20—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
- G07D7/06—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
- G07D7/181—Testing mechanical properties or condition, e.g. wear or tear
Definitions
- the invention relates to a method for checking value documents, in particular for detecting forged value documents, and to an apparatus for carrying out the method.
- a fake value documents in particular for detecting forged value documents
- an apparatus for carrying out the method In the foreseeable fake
- Value documents are composed counterfeits, which are composed of parts of different value documents.
- the composed counterfeits can be composed of parts of genuine and forged value documents, but there are also known composite counterfeits, which are composed exclusively of parts of real value documents.
- a property of a first feature of the value document to be checked is determined in a first step, and a property of a second feature of the value document in the second step.
- the properties of the first and second features are compared with one another and a difference between the first and the second feature is determined therefrom.
- the properties to be compared are the same property as e.g. the color of the first feature and the color of the second feature.
- the property of the first and the second feature are preferably determined with the same sensor.
- the determined difference is evaluated. During the evaluation, it is checked whether the difference determined lies within a predetermined value range, which contains the setpoint values for the difference that are considered acceptable.
- This range of values is determined, for example, using standard data that applies to the value document.
- the limits of the range of values of the setpoints are given by one or more thresholds, e.g. Maximum or minimum values for the determined difference.
- the standard data includes e.g. Information about reference features and maximum acceptable deviations from the reference features.
- the further step which serves to determine a difference, can also-as an alternative to the direct comparison of the properties of the two features-also be that a property to be expected for the second feature is compared with the property of the second feature.
- the property to be expected for the second feature can be extrapolated be determined, for example, by extrapolating from the or the properties of the first feature and / or from further measurement data of the value document. Extrapolating may also be performed using default data for the bill, for example, based on the first feature.
- the position of a second print image detail can be extrapolated, for example, from the position of a first print image detail, with the aid of a reference print image determined on the basis of a large number of corresponding print images of genuine banknotes.
- the extrapolation can also be carried out from further measurement data of the banknote, eg from the measured spatial arrangement of further features with the aid of the standard data.
- the expected property can also be determined using the standard data that applies to the value document.
- the difference thus determined is generally different from the difference found in the former variant of the method.
- the determined difference is compared with target values, wherein the target values are also determined from the standard data for the value document. These nominal values are generally also different from the nominal values of the first-mentioned variant of the method.
- it is checked whether the determined difference lies in the value range of the desired values, which contains, for example, the maximum acceptable deviations of the property of the second feature from the property to be expected for the second feature.
- a match of the difference with the desired values can also be checked and a corresponding degree of agreement can be determined.
- the standard data which are used as a basis for the value range of the setpoint values and / or for determining the expected property of the second feature, can be determined on the basis of a plurality of value documents or determined in advance of the test.
- the standard data are preferably determined on the basis of value documents of the same type as the value document to be checked; in the case of banknotes, for example, on the basis of banknotes of the same denomination.
- the standard data contain, for example, information about the properties of reference features and about the maximum acceptable deviations of the properties of the features tested in the method according to the invention from the properties of the reference features.
- specific standard data can be stored. The default data may be selected based on the type of value document, such as the currency and denomination of a bill.
- the type of value document is identified for this purpose, for example, before the value document is checked.
- this identification may be, for example, a denomination determination preceding the method according to the invention.
- the first and second features to be compared in the method according to the invention may be similar but also different features.
- the method may be performed for a single feature of the two features, however, it may be performed for multiple features of the two features.
- the method can also be carried out for further first and second features. It is particularly advantageous to carry out the method both for features of the front side and for features of the back side of the value document, ie At least one feature pair of the front side and at least one feature pair of the backside is checked.
- the first and / or the second feature is at least a section of at least one predetermined print image.
- the first and second features may be, for example, sections of the same predetermined print image. However, they may also be cutouts of various predetermined print images which have preferably been produced by the same printing process (for example offset printing, stitch print, ...), in particular within the same printing step.
- the printed image areas produced with the same printing method, in particular within the same printing step, have a very well-defined relative position with respect to one another which can hardly be exactly reproduced during the subsequent assembly of individual parts of the value documents.
- the printed images to be compared in terms of their properties may include one or more sections of one or more design elements, e.g. Symbols or geometric elements, and / or one or more image motifs, e.g. Illustrations of persons, structures, animals, objects, or the like, or even one or more sections of patterns, lettering or characters, such. Characters, numbers, letters.
- the first and / or second feature in addition to or as an alternative to the printed image or cutout, has at least one detail of a security element or an edge of the value document.
- the property with respect to which the first and second features are compared preferably relates to the position and / or the shape of the respective feature.
- the property of the first and second features and the property to be expected for the second feature relates to the position and / or the shape of the respective feature.
- Properties which relate to the shape of the respective feature are, for example, a color, a spectral and / or spatial color distribution, a size or a shape of the respective feature.
- Properties which relate to the position of the respective feature are, for example, an absolute position, a relative position, in particular a distance relative to a reference feature or an orientation relative to a reference feature.
- reference print image for example, an edge of the value document, a security element, a reference print image or even a section of the same can be used.
- the reference print image may be, for example, another section of the predetermined print image of the first and / or the second feature, but it may also be a section of another print image that has preferably been produced using the same printing method, in particular within the same printing step, as the print image of FIG first and / or second feature.
- the relative positions and orientations of the features are very well defined, especially for printed features made within the same printing process or even within the same printing step.
- the method according to the invention is therefore preferably carried out in such a way that certain printed image areas are used as features of which a difference concerning the position is determined.
- the difference determined with the method according to the invention is compared with the respective setpoint values and it is checked whether the determined difference lies in the value range of the respective setpoint values.
- the determined difference should lie in the value range of the respective setpoint values.
- the probability is high that at least some features have differences, at least in some of their properties, which are not within the value range of the respective set values. Due to the subsequent composition of the composed forgery, it is to be expected that, for example, the difference between the absolute position of some print image areas deviates by more than the acceptable deviation from the reference values of the genuine value documents.
- the evaluation of the difference determined takes place, for example, to determine the authenticity of the value document or else to check the fitness of the value document, for example for the presence of cracks or adhesions.
- printed images that are cracked and subsequently reassembled can be modified so that the positional differences found on the printed image are outside the range of the desired values Characteristics deviate from those of undamaged real value documents and are detected by the method according to the invention.
- a composed counterfeit may have one or more dividing lines on which it is composed. While the position of these dividing lines on the composed counterfeit is unpredictable, however, it is advantageous for the detection of composed forgeries to selectively use those features that are arranged with high probability on different sub-banknotes of the composed counterfeiting. For this reason, the method according to the invention is preferably carried out on the basis of properties of such features which are arranged as far apart as possible on the value document.
- the first and second features are selected so that the distance between these features in one direction, in particular in the direction along the connecting line of the features extends over a substantial part of the value document, but at least half the extent of the value document.
- first and further second features with each other, whose connecting line with the connecting line of the first and second feature include a large angle, for example an angle of at least 20 °.
- the position of the separating lines of a plurality of known composed counterfeits can also be detected and from this a probability for the position of the separating lines on the document of value to be checked can be determined.
- the features to be used for the method according to the invention can be selected such that most of the known parting lines run between these features.
- a second method for detecting counterfeit documents of value can take place in the following way:
- a feature of a value document is identified in a first step, in particular a feature of a banknote or banknote a composed fake.
- at least one section of at least one print image is preferably selected, for example at least one section of a print Pattern or a lettering or a sign, in particular a number, a letter or a character.
- a recognition of a character string can be performed by means of an OCR method.
- the size and / or shape and / or structure of the feature is determined, preferably with a higher accuracy than in the identification.
- the specific size and / or shape and / or structure of the feature is compared with at least one size and / or shape and / or structure to be expected for the feature.
- This size and / or shape and / or structure to be expected for the feature is determined using the standard data that applies to the value document.
- This standard data may be selected based on the previously determined type of value document, such as the currency and denomination of a bill, and include, for example, information about the characteristics of reference features and about the maximum acceptable deviations thereof.
- the determined difference is compared with target values, wherein the target values are also determined from the standard data for the value document.
- the determined difference lies in the value range of the setpoint values, which contains the maximum deviations with respect to the size and / or shape and / or structure of the feature or which exceeds the maximum deviations.
- the evaluation it is checked, for example, how good the correspondence between the measured properties of the feature and the desired values is and determines a corresponding degree of correspondence.
- an OCV method can be used.
- the features are for example optically, in particular in the visible or in the non-visible spectral rich, or even magnetically recorded.
- Another aspect of the invention relates to the apparatus used to carry out the method. This can have a sensor for checking value documents, in particular banknotes, such as an image sensor for detecting optical features of the value document or a magnetic sensor for detecting magnetic features.
- FIG. Ib Schematic illustration of a composed counterfeit composed of two parts
- Fig. 2a print image offset in a composed forgery
- Fig. 2b section of the Denominationsangabe a composed- forgery, whose dividing line goes through the figures of Denominationsangabe.
- FIG. 1 b shows schematically a composed counterfeit 1 which is composed of two parts, for example a left, real partial banknote Ia and a right, incorrect partial banknote Ib.
- a dividing line 2 which runs approximately vertically through the composed counterfeiting 1, the two partial bank notes 1a and 1b are glued together.
- an image sensor is used with which, inter alia, the lower edge 50 of the banknote 10 is detected.
- the absolute position of a left portion of the lower edge 50 may be determined, for example, from the left corner a certain distance to the right, and analogous to the absolute position of a right portion of the lower edge, from the right corner one step behind on the left.
- the absolute positions of the lower edge sections 5a, 5b are determined.
- a difference is determined by comparing these absolute positions, for example by subtraction of the coordinates of the two corner points or of a plurality of individual pixels of the two lower edge sections.
- the difference is compared with target values which result from standard data valid for the value document, which have been determined, for example, in advance of the method on the basis of genuine banknotes of the same denomination.
- the determined difference of the absolute positions is in the case of a genuine banknote 10 with a very high probability in the value range of the desired values for this position difference.
- the difference exceeds the limits of the value range of the setpoint values for this positional difference, given a correspondingly large deviation.
- the result of the evaluation of the difference can be used in this way for checking a banknote, in particular for recognizing a composed counterfeit.
- the evaluation result can be used not only as authenticity criterion but also to check the fitness of the banknote, for example, to identify a torn banknote or a banknote glued together with adhesive strips. Even with these, a shift of the positions of features may result if, for example, banknote parts have been stuck together somewhat obliquely or if the parts of a torn-in banknote are slightly displaced relative to one another during the transport of the banknote.
- a difference of the absolute positions of the right and left lower edge sections can also be determined as follows: a first of the absolute positions of the two lower edge sections, eg of the left lower edge section 5a, that for the second lower edge section, 5b, expected absolute position. This can be done for example by extrapolating the course of the first lower edge portion 5a. Subsequently, a Difference between the expected extrapolated position of the second lower edge portion 5b and the actual position of the second lower edge portion 5b is determined and compared with target values for the difference.
- the difference and the target value in this embodiment are relatively small as compared with those of the first-described embodiment.
- the serial numbers 3a and 3b have a relative position and a relative orientation to each other that deviates from the relative position and orientation of the two serial numbers 30 of the genuine bill. Since the dividing line 2 runs between the numerals of the denomination "1000" of the banknote, the digit print images 4a and 4b also have a relative position and orientation that deviates from the corresponding notes of the genuine banknote 10. The dividing line 2 also extends through the printed images shown above the denomination, so that the partial printing images 6a and 6b or 7a and To have a deviating relative to the genuine banknote 10 relative position and orientation (printed image offset).
- the property to be determined according to the invention can also be the size of the features, eg the size of the serial numbers 3a and 3b, the numbers of the denomination data or even the printed images.
- the distance of the respective feature for example, the serial number 3a and 3b are determined to a reference feature, such as the distance to an edge of the value document or to another security element on the banknote (not shown).
- the reference feature may also be a reference print image to which the spacing of a first and a second detail of another print image is determined.
- the reference print image could be, for example, the denomination digit "1" at which the distances of the right outer edge of the print image 7b and the left outer edge of the print image 7a could be determined
- the color of the print images 6a and 6b or 7a and 7b For example, the color of the printed images of the two sub-bank notes 1a, 1b can be different, while the color within the printed images 60 or 70 of the genuine banknote 10 is uniform., for example, properties such as the middle color of the printed image or the one or more If the characteristics of the composed counterfeit 1 do not accurately reflect those of the genuine banknote 10, the difference determined from the properties of the two features is outside the range of the setpoints e Counterfeit detection possible.
- the printed image composed of the printed images 6a, 7a of the genuine partial bank note 1a and the printed images 6b, 7b of the incorrect partial banknote 1b is shown in FIG. 2a (solid lines).
- the two printed images 6a 'and 7a' extrapolated from the printed images 6a, 7a are sketched (dotted lines) which have the absolute position to be expected for the printed images 6b, 7b.
- the absolute position of the printed image 6a ' can be extrapolated, for example, from the straight course of the printed image 6a.
- standard data of the (true) print image 60 could be used in this case. For example, to determine the length and the exact shape of the extrapolated print image 6a '.
- the absolute position of the print image 7a ' which has the absolute position to be expected for the print image 7b, is determined starting from the print image 7a using the standard data of the (real) print image 70 of the banknote. Subsequently, a difference is determined by comparing the absolute position of the print image 6a 'or the print image 7a' with the (actual) position of the print image 6b or 7b, for example by comparing the coordinates of certain print image details. The difference is compared with target values that this difference may take in the case of genuine banknotes.
- the setpoint values which are valid, for example, for the difference of the coordinates of the lower right corner of the print images 6a 'and 6b or 7a' and 7b, may be, for example, in a zero-inclusive value range which extends over a range of zero.
- This fluctuation range can be determined from the standard data of the banknote and, for example, extend symmetrically or asymmetrically around zero.
- the difference of the y-coordinates of the lower right corner is relatively large and is high
- FIG. 2b shows a further example of a print image offset in the case of another composed counterfeit, with the aid of which the second invention appropriate method is shown.
- the two characters "1" and "0" belong, for example, to a denomination indication, through which a dividing line 8 runs.
- the character "1" is formed by a printed image 9, which in this case is composed of two partial printed images 9a and 9b.
- a feature of the banknote or composed counterfeit is identified in a first step. This step may consist, for example, in the recognition of the characters of the denomination indication, in particular of the print image 9 as a character "1", with the aid of an OCR method. Subsequently, for example, the shape and size of the printed image 9 is determined.
- a difference is determined.
- the expected shape and size is determined using standard data that applies to genuine denomination denominational counterfeit banknotes.
- the standard data contain reference characters, for example, which are selected from a set of reference symbols based on the previously determined currency and denomination of the banknote or composed counterfeit to be checked.
- the difference it is possible, for example, to subtract intensity values from different pixels of the print image 9 or the reference symbol "1.”
- the determined difference is compared with desired values good is the correspondence between the print image 9 and the reference mark "1" with respect to its shape and size. It is checked whether the determined difference lies in the value range of the setpoint values or exceeds the maximally acceptable deviations of the character form and character size.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007015484A DE102007015484A1 (en) | 2007-03-30 | 2007-03-30 | Method and device for checking value documents |
PCT/EP2008/002537 WO2008119531A1 (en) | 2007-03-30 | 2008-03-31 | Method and device for verifying value documents |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2132719A1 true EP2132719A1 (en) | 2009-12-16 |
EP2132719B1 EP2132719B1 (en) | 2018-11-07 |
Family
ID=39535820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08734898.3A Active EP2132719B1 (en) | 2007-03-30 | 2008-03-31 | Method for verifying value documents |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2132719B1 (en) |
CN (1) | CN101681532B (en) |
DE (1) | DE102007015484A1 (en) |
ES (1) | ES2701156T3 (en) |
RU (1) | RU2469405C2 (en) |
WO (1) | WO2008119531A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009133332A1 (en) | 2008-05-02 | 2009-11-05 | De La Rue International Limited | Method and apparatus for determining authenticity |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010021803A1 (en) * | 2010-05-27 | 2011-12-01 | Giesecke & Devrient Gmbh | Apparatus for checking the authenticity of documents of value |
JP6233138B2 (en) * | 2014-03-28 | 2017-11-22 | 沖電気工業株式会社 | Banknote handling equipment |
CN105528825B (en) | 2015-12-02 | 2018-08-31 | 广州广电运通金融电子股份有限公司 | Valuable document self-adaptive identification method and device |
CN107123187A (en) * | 2017-05-24 | 2017-09-01 | 广州广电运通金融电子股份有限公司 | A kind of authenticity of banknotes detection method and system |
US11113689B2 (en) | 2019-07-03 | 2021-09-07 | Sap Se | Transaction policy audit |
US11308492B2 (en) * | 2019-07-03 | 2022-04-19 | Sap Se | Anomaly and fraud detection with fake event detection using pixel intensity testing |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH609795A5 (en) * | 1976-04-30 | 1979-03-15 | Gretag Ag | |
US4041456A (en) * | 1976-07-30 | 1977-08-09 | Ott David M | Method for verifying the denomination of currency |
JPS5665291A (en) * | 1979-10-31 | 1981-06-02 | Tokyo Shibaura Electric Co | Discriminator for printed matter |
US4464786A (en) * | 1981-06-17 | 1984-08-07 | Tokyo Shibaura Denki Kabushiki Kaisha | System for identifying currency note |
US4881268A (en) * | 1986-06-17 | 1989-11-14 | Laurel Bank Machines Co., Ltd. | Paper money discriminator |
GB9424971D0 (en) * | 1994-12-10 | 1995-02-08 | At & T Global Inf Solution | Document authentication system |
US6272245B1 (en) * | 1998-01-23 | 2001-08-07 | Seiko Epson Corporation | Apparatus and method for pattern recognition |
JP2001126107A (en) * | 1999-10-29 | 2001-05-11 | Nippon Conlux Co Ltd | Method and device for identifying paper sheets |
EP1173001A3 (en) * | 2000-07-11 | 2004-05-06 | Eastman Kodak Company | Authenticatable image with an embedded image having a discernible physical characteristic |
DE10122100A1 (en) * | 2001-05-07 | 2002-11-14 | Giesecke & Devrient Gmbh | Device and method for examining objects |
RU2280284C2 (en) * | 2004-07-26 | 2006-07-20 | Общество с ограниченной ответственностью Фирма "ДАТА-ЦЕНТР" (ООО Фирма "ДАТА-ЦЕНТР") | Method for determining invalid banknotes, produced by gluing together parts of banknotes and fake banknotes |
DE102005016824A1 (en) * | 2005-04-12 | 2006-10-19 | Giesecke & Devrient Gmbh | Device and method for checking value documents |
-
2007
- 2007-03-30 DE DE102007015484A patent/DE102007015484A1/en not_active Withdrawn
-
2008
- 2008-03-31 EP EP08734898.3A patent/EP2132719B1/en active Active
- 2008-03-31 CN CN2008800101113A patent/CN101681532B/en active Active
- 2008-03-31 ES ES08734898T patent/ES2701156T3/en active Active
- 2008-03-31 WO PCT/EP2008/002537 patent/WO2008119531A1/en active Application Filing
- 2008-03-31 RU RU2009139909/08A patent/RU2469405C2/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2008119531A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009133332A1 (en) | 2008-05-02 | 2009-11-05 | De La Rue International Limited | Method and apparatus for determining authenticity |
Also Published As
Publication number | Publication date |
---|---|
DE102007015484A1 (en) | 2008-10-02 |
CN101681532B (en) | 2013-07-31 |
WO2008119531A1 (en) | 2008-10-09 |
ES2701156T3 (en) | 2019-02-21 |
RU2009139909A (en) | 2011-05-20 |
CN101681532A (en) | 2010-03-24 |
EP2132719B1 (en) | 2018-11-07 |
RU2469405C2 (en) | 2012-12-10 |
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