EP2769364B1 - Procédé de vérification d'un document de sécurité par une barrière visuelle à l'aide d'un dispositif d'affichage - Google Patents

Procédé de vérification d'un document de sécurité par une barrière visuelle à l'aide d'un dispositif d'affichage Download PDF

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Publication number
EP2769364B1
EP2769364B1 EP12783164.2A EP12783164A EP2769364B1 EP 2769364 B1 EP2769364 B1 EP 2769364B1 EP 12783164 A EP12783164 A EP 12783164A EP 2769364 B1 EP2769364 B1 EP 2769364B1
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EP
European Patent Office
Prior art keywords
security document
partial image
images
different
security
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EP12783164.2A
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German (de)
English (en)
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EP2769364A1 (fr
Inventor
Olga Kulikovska
Olaf Dressel
Jörg Fischer
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Bundesdruckerei GmbH
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Bundesdruckerei GmbH
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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
    • G07D7/128—Viewing devices
    • 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
    • G07D7/003—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 security elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/207—Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns

Definitions

  • the invention relates to a method for the verification of security documents with which security documents can be reliably tested for their authenticity and / or integrity.
  • the invention relates to a method for verifying security documents which comprise a visual barrier which allows for a viewing through the security barrier and the security document for at least one viewing geometry.
  • Security features are understood to mean all features which make it impossible or at least significantly complicate the imitation, falsification, duplication or unauthorized production of an object.
  • a document which has at least one security feature is called a security document.
  • Security documents include, for example, identity documents such as identity cards, passports, identification cards, access cards, but also driving licenses, visas or documents of value such as banknotes, securities, postage stamps, customs stamps and the like, to list only a few.
  • seals and labels for authentication of the authenticity of products or security features protected against counterfeiting or falsification security features and the like are considered as security documents.
  • Both a material texture, a combination of different materials, a special printing, an introduction of diffractive, reflective structures and the like can be used as security features.
  • Other security features may be formed, for example, by means of an integrated microchip, a magnetic stripe, or other materials having certain physical or chemical properties, such as a luminescent characteristic or the like.
  • An essential function of security features is to offer a possibility to determine a genuineness and / or authenticity of the security feature itself as well as of the security document in which the corresponding security feature is integrated. Such a procedure is called verification.
  • the authenticity and / or integrity of the security feature and / or the security document is checked.
  • individual security features In addition to verification of the authenticity and / or integrity of a security document, individual security features, In particular, those in which information is stored can be used to perform a higher level verification of the security document or control of a person associated with the security document.
  • a simple example of this is, for example, a serial number integrated in a passport, which can be used after a read-out in order to determine via a comparison with a database in which stolen passports are registered, whether the pass which is being verified, belongs to the stolen reported passes or not. It is understood by those skilled in the art that more complex verification measures or more complex features can be used for such verifications.
  • Security documents are known from the prior art, which include security features that show different graphical images under different viewing geometries.
  • Different imaging geometries may, for example, be defined by different viewing directions relative to a direction associated with and associated with the security document.
  • a surface normal to the security document may be set as the reference direction with respect to which the viewing directions of the security document are defined.
  • security features are known, which are also referred to as tilt images, which disclose different information under different viewing directions.
  • Such security features can be implemented differently.
  • holograms or other diffractive structures can be used for this purpose.
  • Other embodiments use microlenses, for example, which image different information portions stored in the document under different viewing directions.
  • Such security features are also referred to in the art as CLI (Changeable Laser Image) or MLI (Multiple Laser Image) features.
  • CLI Changeable Laser Image
  • MLI Multiple Laser Image
  • Other security features use so-called parallax barriers in which individual areas of information are obscured by the viewing barrier, which is spaced from the stored information and located in front of the stored information with respect to the viewing direction.
  • WO 2006/018171 A2 and the DE 10 2004 051 919 A1 are a security element for securing security papers, documents of value and the like with a transparent carrier known.
  • the transparent carrier is with a Provided authenticity mark that conveys a first visual impression in transmitted light and conveys a second optical impression in reflected light in front of a specific and easily accessible background, which differs significantly from the first visual impression.
  • Level 1 security features Features which can be read out by a human person without the aid of further technical aids from the security document or can be checked directly for their authenticity and authenticity are referred to as so-called Level 1 security features.
  • Level 2 features Features requiring technical aids for review are referred to as Level 2 features.
  • the object of the invention is therefore to provide a verification method and a verification system, with which an improved verification by exploiting widespread objects is possible.
  • the invention is based on the idea to display graphical information on a display device and to arrange a value and / or security document in front of the display area. Subsequently, at least two graphic images are recorded for different viewing geometries and the graphic images are evaluated and from this a verification decision is derived.
  • a security feature is a feature that makes it difficult or impossible, or at least makes its manipulation recognizable, an imitation, falsification or unauthorized production of an object in which the security feature is incorporated or in which this is formed.
  • a see-through security feature is a security feature that has one or more transparent or translucent areas. A captured graphic image of the transparent or translucent areas is thus dependent on what is on the side facing away from the viewer of the see-through security feature.
  • Security documents are all those documents that include at least one security feature, typically a variety of security features.
  • Security documents include, for example, personal documents such as passports, identity cards, access cards, identification cards, driving licenses, but also bank cards, credit cards, visas or the like, just to name a few.
  • Security documents which additionally embody a value, are also referred to as value documents.
  • Security documents which at the same time represent value documents, are, for example, banknotes, postage stamps, securities, entry tickets secured with security features or the like. A precise delimitation of the subgroup of value documents is sometimes difficult. In terms of what is described here, such delineation does not matter. All value documents are also security documents according to the definition given here.
  • a display device in the sense of what is described here is a device which can generate a graphic representation on a display surface.
  • the display device is designed so that different information contents can be displayed one after the other at the same presentation positions.
  • Such a display device is also referred to as a freely programmable display area, since the information content, which is displayed at a display position, can be selected freely, for example via program-controlled image data generation.
  • Television screens but also computer screens, matrix-like LCD, TFT screens or the like are display device in the sense of what is described here. Further, visualizers of cell phones, personal digital assistants (PDAs) or similar are display devices as described herein.
  • each structural unit of a security document is understood, which selectively releases different information components for different viewing geometries, which are arranged, formed or displayed on a side of the visual barrier facing away from the viewer or a detection unit.
  • a visual barrier may for example consist of a microlens array, wherein the microlenses do not necessarily have to be formed with an identical focal length and / or orientation of their optical axis.
  • a visual barrier may also be in the form of a pattern of transparent or translucent areas on the one hand and opaque areas on the other.
  • other visual barriers may be at different angles to a surface normal of a plane
  • Layer formed channels may be formed in the form of through-hole, wherein the layer itself is opaque.
  • a partial image part is a part of an information which is combined with a further partial image part into an overall image, i. H. to complete information.
  • Partial image portions can be, for example, graphic representations of information that can be perceived when viewed through an eye of a human being. Since a perception of a near object by another eye of the same observer takes place from a different position, the parts of the field which are perceived by both eyes of the human observer simultaneously from the same information differ. Thus, two such sub-image portions can complement each other to an overall image, which causes a three-dimensional image impression in a human observer, if the object under consideration is three-dimensional. However, partial image portions can also have completely different information contents, which complement each other to form a total information which can then be graphically recorded.
  • a first subpicture may have seemingly indiscriminately arranged black image areas in front of a monochrome, for example, white background, and a second subpicture also have seemingly randomly arranged black image areas in front of the same background, but complement each other in such a way that in the complement they appear to be random arranged black area represent a total information, which represents, for example, alphanumeric characters or symbols that are easily detectable and represent information coding that can be evaluated in a simple manner for a human observer or for a machine evaluation.
  • An imaging geometry or viewing geometry may, for example, be characterized by a direction under which a security document is viewed or detected.
  • a viewing direction may be defined as the optical axis of camera imaging optics relative to a surface normal of the viewed object. This means that a viewing or graphic detection of an object from different directions represents a detection under different viewing geometries. A detection of an object from the same viewing direction, but from different distances represents a capture of two images under different imaging geometries. It is understood that combinations of these are possible.
  • color mixing is meant a color addition and a color subtraction. If light of different wavelengths, i. H. different colors, superimposed, so often results for a human observer, a color impression that differs from the color impressions that cause the different wavelengths in a separate consideration. This process is called color addition.
  • An image constructed of different colored pixels that no longer resolves a human eye separately also often causes a color impression to the viewer, which differs from the color impressions that the individual pixels or print pixels have in a human viewing Invoke observers. If an image is composed of different body colors, then the mixture is called color subtraction.
  • a method for verifying a value or security document comprising the steps of: operating a display device, on the display surface of which a graphical representation is displayed, arranging a security document in front of a display area with the illustrated graphical representation (in particular placing the security document on the display area ), wherein the security document comprises a security feature with a visual barrier which, when viewing or capturing an image in view for different viewing geometries, in particular different viewing directions and / or viewing distances or detection directions and / or detection distances, releases different information portions located behind the visual barrier, wherein the visual barrier is integrated into the security document in such a way that, at least for one viewing geometry, a view through the visual barrier u the security document is possible to an information component located behind the security document, wherein the graphical representation comprises at least a first partial image portion for the at least one viewing geometry, capturing at least two images of the security document mounted in front of the display device for at least two different viewing geometries, evaluating the captured at least two figures and derivation of a verification
  • a homogeneously monochromatically formed first partial image component is displayed on the screen, which produces a first color impression, and at least a second partial image component is represented, which is homogeneously monochrome and causes a second color impression different from the first color impression , and it is checked in the evaluation whether a monochrome color impression is produced in a human observer when viewed through the visual barrier, which is different from the first and the second color impression.
  • a monochrome color impression is produced in a human observer when viewed through the visual barrier, which is different from the first and the second color impression.
  • it is checked whether different partial images causing monochrome color impressions can be added to form an overall image which causes a deviating homogeneous monochrome color impression in the viewer in the overall picture.
  • the at least two images for different viewing directions are detected.
  • a human user this is done, for example, by a simple look with both eyes. Since these are spaced apart, consider the two eyes that in front of the display area the display device arranged security document under different viewing directions. An evaluation and verification can thus be perceived directly by a human observer in a simple manner.
  • Another embodiment according to one aspect of the invention provides that the at least two images from different distances are detected by the security document.
  • at least one second partial image portion is stored in the security document, which can be perceived through at least one of the at least one viewing geometry, for example the different viewing geometry, for example different viewing directions, and at least one of the at least one viewing geometry two pictures a supplement of the partial picture parts to an overall picture is examined. For example, it can be checked whether alphanumeric characters or simple graphic symbols that are not completely contained in the partial image portions can be detected in the overall image.
  • At least one second partial image component is displayed on the display surface in addition to the at least one partial image component and it is checked during the evaluation of the at least two images as to whether the images in each case comprise the first or the second partial image component in such a way that that these add up to an overall picture.
  • the two pieces of information that the user perceives are both displayed on the display surface so that they are "rendered" perceptible by the visual barrier of the security document into separate viewing geometries, such that overlaying the sub-images gives an overall picture.
  • the sub-images are arranged to produce a 3D effect on a human observer with excellent viewing geometries for the at least two images.
  • the first partial image portion displayed on the display surface and the second partial image portion either displayed on the display surface or be formed in the security document itself.
  • the partial image information or partial image information which is displayed on the display surface must therefore be adapted to the visual barrier and optionally additionally to a partial image component which is formed in the security document.
  • an identifier is detected and the graphical representation on which the display area is retrieved from a memory, for example a database, or generated mathematically on the basis of the identifier as a function of the identifier.
  • a memory for example a database
  • Other embodiments of security documents can be designed such that they can each be verified with the same graphical representation on the display area.
  • the verification should only be possible if a person who is assigned to the security document agrees to this verification. This is for example possible because in addition to the identifier, a PIN is detected and retrieval and / or generating the graphical representation is only possible if the identifier and the associated PIN have been detected and verified as belonging together correctly.
  • Personal information is information that is personalized to a person to whom the security document is associated characterize.
  • Personalizing information may be, for example, a name, a date of birth, an address or the like.
  • such personalizing information is stored in the visual barrier of the security document, and is perceivable when the security document is viewed in front of the display area, as long as the graphical representation on the display surface is adapted to the visual barrier and possibly to the image portions stored in the first security document becomes.
  • information on the display surface it is possible for information on the display surface to be perceptible when viewed or mapped without a security document disposed in front of it, but obscured by the visual barrier, although a resulting overall image does not appear to encompass covered image areas.
  • a visual barrier comprising microlenses. Under certain viewing geometries, individual components of information for particular viewing directions are selectively "not displayed” and instead, other information components are mapped.
  • information portions disposed on the display area in the graphical representation are "scattered" to depict information that is graphically captured by a human viewer, such as alphanumeric characters or simple graphical symbols.
  • the representation of the at least one partial image portion and / or the at least second partial image component is anchored on the display surface or be and multiple imaging pairs are evaluated.
  • a positive verification decision is made, for example, if an expected addition of the partial image portions to an overall picture is successfully possible for one of the image pairs. Such a successful completion takes place, for example, when a 3D impression is created in a human observer.
  • the arrangement of the security document in front of the display area varies and the at least two images evaluated at least in pairs, wherein each evaluated at least in pairs of at least two images, such images are the same time or at least for the same orientation of the security document relative to the same representation on the Display area and the at least two mutually different viewing geometries are detected. It is also possible, alternatively or additionally, to vary the viewing geometries, for example by changing a viewing distance which in a human observer is accompanied by a viewing direction change for the perceived images in the eyes.
  • a security document 1 which in the illustrated embodiment comprises a see-through security feature 2, is arranged in front of a display surface 3 of a display device 4.
  • the display device 4 may be, for example, an ordinary computer screen on which content, for example software-controlled, can be displayed in a targeted manner.
  • the display device may also be a display of a mobile phone, a personal digital assistant or a digital camera or the like.
  • a graphic 5 is controlled on the display surface 3 via a computer 5.
  • the graphical representation that can be displayed on the display surface 3 comprises at least a first partial image portion 101 for a verification of the security document 1 or the see-through security feature 2 contained therein.
  • the at least one partial image portion is formed in the form of strips 101-1 in this embodiment.
  • the strips 101-1 can all be formed homogeneously monochrome.
  • the stripes 101-1 of the frame portion 101 represent strip-like portions of a photographic image or an alphanumeric "text" against a background.
  • the see-through security feature 2 comprises a visual barrier 210.
  • the visual barrier 210 comprises transparent, for example transparent, in particular color-neutral sections 211 and opaque, opaque sections 212.
  • the transparent sections 211 and the opaque sections 212 are strip-like, alternating in this embodiment. In other embodiments, the geometric configuration of the opaque and transparent sections can be chosen completely differently.
  • the visual barrier 210 can be produced for example by a partial printing, for example with parallel color stripes 213, on a transparent film which is joined together with other films to form a document body, which are transparent at least in the area of the see-through security feature.
  • the visual barrier 210 may be formed by micro-perforations formed, for example, in an inner opaque layer.
  • the perforated opaque layer is laminated between further transparent layers in a security document body.
  • the visual barrier is formed by means of a microlens array.
  • the visual barrier 210 is integrated into the security document 1 in such a way that, under a viewing direction through the visual barrier 210 and the security document 1, it is possible to view information or graphically record information that is displayed behind the security document. Furthermore, the visual barrier is designed such that at least one viewing direction exists under which this information component can be perceived through the visual barrier 210 and the security document 1 and an alternating viewing direction exists by which this information component can not be perceived or at least not completely perceived. The visual barrier thus causes view angle dependent arranged behind the security document Information through the security document and the visual barrier can be perceived or can not be perceived.
  • the detectable graphic image of the see-through security feature 2 is influenced by the viewing angle as a function of the first partial image portion 101 in the area of the transparent security feature 2 and the visual barrier 210 shown on the display area.
  • at least two images are thus detected, which are formed from the "overlaying" of the first partial image portion 101 shown on the display surface 3 and the visual barrier 210 formed in the security feature 2.
  • the graphical representation of the first partial image portion 101 adapted to the security document 1 to be verified or its see-through security feature 2
  • different overall graphic images of the security document 1 or the transparent security feature 2 can be perceived in front of the display surface 3.
  • the captured images which are detected, for example, with a camera (not shown) in succession or with two cameras (not shown) spaced apart, are evaluated in a downstream evaluation device, for example the computer 5, in order to make a verification decision.
  • the first partial image portion 101 which is displayed on the display surface 3 of the display device 4, regardless of the verifiable security document 1 and its see-through security feature 2 in the sense that the same on the display surface 3 shown first partial image portion 101, for example a regular monochrome line grid, for a variety or all security documents 2 can be used to derive from the resulting images of the security document 1 in front of the display surface 3, the verification decision can. For example, it can be checked whether the first partial image portion 101 is perceptible in the image acquired under a viewing geometry, in this case a first viewing direction, and is imperceptible in a captured image under a viewing geometry deviating from the one viewing geometry, here a different viewing direction is.
  • a second partial image portion 102 is shown graphically.
  • the second partial image portion 102 is also formed strip-shaped, wherein the strips 101-1 of the first partial image portion are arranged alternately with strips 102-1 of the second partial image portion 102 on the display surface.
  • the arrangement is adapted to the visual barrier 210 of the security document 1, which is to be verified with this graphical representation on the display surface 3.
  • the partial image portions 101 and 102 which are perceptible in the two captured images represent partial images that lead to a three-dimensional image impression in a human, provided that Images are each separately "fed” to one of the eyes of a person.
  • a human being at a suitable distance from the security document 1 views the see-through security feature 2 while the security document 1 is arranged in front of the display surface 3, he or she can perceive a three-dimensional image as long as the partial image information portions 101, 102 are suitably adapted to the visual barrier 210.
  • FIG. 2 A higher level of verification security is obtained with a system which is in Fig. 2 is shown schematically.
  • the first partial image portion 101 or are the partial image portions 101, 102 shown on the display surface 3 of the display device 4 depending on an identifier 10, which is assigned to the security document 1.
  • a serial number 11 is used as identifier 10.
  • the identifier 10 is detected by a detection device 12.
  • the detection can be optical, magnetic, electronic, for example via a wireless communication from a microchip (not shown).
  • the detection device 12 may also be a keyboard via which an input of the serial number is detected.
  • an additional personal identification number (PIN) 17 can be recorded.
  • the identifier 10 and optionally the PIN 17 are used to retrieve a graphical information associated with the identifier 10 from a database 13, or to calculate using an algorithm, which is implemented for example in the computer 5 by means of a program code.
  • a first partial image portion 101 and a second partial image portion 102 are displayed here.
  • the security document 1 which comprises a see-through security feature 2 with a visual barrier 210, arranged. Subsequently, the at least two images for different viewing geometries are detected, which capture at least part of the see-through security feature 2 in transmitted light.
  • the captured image are detected, for example, by means of a camera 14 and evaluated in the computer 5 or viewed by a user 6, who evaluates the optically detected image and derives a verification decision.
  • the verification and derivation of the verification decision can be made via a comparison with specifications 15, 16, which are shown schematically with the associated verification decisions in Fig. 2 are shown.
  • the evaluation can also be done in the computer 5.
  • a visual barrier is schematically based on the Figures 3, 3a and 3b explained.
  • a security document 1 is shown, which comprises, for example, on a front side 220 formed of opaque, spaced from each other arranged color strips 213 visual barrier 210.
  • a visual barrier formed in this way can also be formed in the interior of the security document 1.
  • the security document 1 is transparent and color-neutral in the illustrated embodiment. This means that light of all wavelengths in the visible wavelength range can pass through the security document with almost no attenuation or at least without any attenuation, or at least, however, this wavelength-independent attenuation. Only the color stripes 213 are designed such that they preferably completely absorb light in the visible wavelength range.
  • the security document 1 is arranged for verification in front of a display surface 3 of a display device 4.
  • a first partial image portion 101 and a second partial image portion 102 are shown, which are formed of alternately nested strips 101-1, 102-1.
  • the stripes 101-1 of the first partial image portion 101 are formed homogeneously red and the stripes 102-1 of the second partial image portion 102 are homogeneously green.
  • Fig. 3a When viewed perpendicularly to the front side 220 of the security document 1, only green light passes through the transparent or transparent portions 211. The red light is absorbed by the color stripes 213 and can not be detected by a first image in the vertical viewing direction.
  • Fig. 3a When viewed perpendicularly to the front side 220 of the security document 1, only green light passes through the transparent or transparent portions 211. The red light is absorbed by the color stripes 213 and can not be detected by a first image in the vertical viewing direction.
  • the stripes 101-1 of the first sub-image portion 101 and the stripes 102-1 of the second sub-image portion 102 are each strips of sub-images which, when suitably superimposed, produce a three-dimensional representation of the information contained in the sub-image portions 101, 102 in a human observer.
  • the visual barrier 210 formed in the security document 1 ensures that either only the stripes 101-1 of the first partial image portion 101 or the stripes 102-1 of the second partial image portion 102 can be perceived under different viewing directions.
  • the correct orientation of the security document relative to the graphical representation on the display surface 3 by suitably arranged detection devices, such as cameras, or by human eyes, respectively the sub-images are separately detected.
  • detection devices such as cameras, or by human eyes, respectively the sub-images are separately detected.
  • a human observer perceives a three-dimensional image in such a case.
  • Fig. 4a this situation is shown schematically.
  • the left eye 231 perceives only the first partial image portion and the right eye 232 only the second partial image component 102 true.
  • Fig. 5 an alternative embodiment is shown in which the visual barrier 210 is formed by perforations 241, for example micro perforations in an otherwise opaque security document.
  • perforations 241 for example micro perforations in an otherwise opaque security document.
  • the security document can be moved relative to the display surface and temporally successive images are detected, which are then evaluated in pairs. In the evaluation, it is checked whether a 3D impression is caused in an arrangement.
  • the graphical representation can be varied on the display surface in order to achieve an adaptation to the respective security document or the visual barrier contained therein and / or the orientation of the security document relative to the display surface 3.
  • these described variations are also useful and applicable in the case of the different visual barriers.
  • a partial image portion 102 which can be supplemented to form a three-dimensional overall image in the security document 1 spaced from the visual barrier 210 is formed and stored.
  • the additional field part 101 necessary for supplementing is then displayed on the display surface 3, so that when the security document 1 is positioned in front of the display surface 3 under one viewing direction the partial image portion 102 stored in the security document 1 1 and under another viewing direction the partial image portion 101 shown on the display surface 3 are perceptible.
  • the verification decision can be made dependent, for example, on whether the partial image component 101 displayed on the display surface is supplemented with partial image component 102 stored in the security document in such a way that a three-dimensional perception is produced by the user.
  • a suitable mixed color which is caused, for example, by homogeneously monochromatic sub-image components in a human observer, provided that the sub-image components are interlaced with one another by their geometrical dimensions so that the viewer can see the individual geometric configurations of the transparent and opaque sections does not dissolve, but the perceived from the two perceived by the different parts of the field parts overall representation perceives as a total information.
  • Fig. 7 schematically another embodiment is shown, in which the visual barrier is formed by microlenses.
  • the viewing barrier comprises a microlens array 300 including first microlenses 301 having a first focal length 305 and second microlenses 302 having a second focal length 306 different from the first focal length.
  • the first and the second microlenses 301, 302, which are for example cylindrical lenses, are arranged alternately. These form under a first viewing direction different partial image portions 101, 102, which are shown on the display surface 3 of a display device 4, in different image planes 303, 304 from.
  • images captured at different distances can perceive different information contents and can be used to derive the verification decision.
  • microlenses form different areas of the display area under different viewing directions, so that a viewing angle dependence is also present.
  • partial image portions which are shown on the display surface are also perceived in this embodiment in such a way that a three-dimensional image impression is produced by a viewer.
  • Fig. 8 an embodiment is shown in which again a partial image portion of the information is stored in the security document.
  • the security document 1 comprises a microlens array 300 in which the microlenses 301 all have the same focal length 305.
  • the different partial image portions, the partial image portion 101 displayed on the display surface, and the partial image portion 102 stored in the security document 1 become different levels sharply imaged, since the information portions, ie the sub-picture portions 101, 102 are arranged at different distances to the microlenses.
  • the microlenses may be configured to image information perceivable on the display surface when viewed without the security document placed in front of the display surface when the security document is placed in front of the display surface so that it is no longer perceptible, but instead uniformly monochrome surface is perceived.
  • the pieces of information carrying, for example, alphanumeric information are mapped in directions that do not coincide with the one viewing direction. Instead, information portions of the background for "populating" the areas where the alphanumeric information is displayed on the display area are imaged for perception from the one viewing direction.
  • the microlenses are formed such that a seemingly random pattern is imaged by the microlenses so that, for example, alphanumeric information is perceptible. It is understood by those skilled in the art that only exemplary embodiments of visual barriers are described here.

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  • Editing Of Facsimile Originals (AREA)

Claims (6)

  1. Procédé servant à vérifier un document de valeur ou de sécurité (1) comprenant les étapes suivantes consistant à :
    faire fonctionner un dispositif d'affichage (4) sur la surface d'affichage (3) duquel une représentation graphique est affichée,
    disposer un document de sécurité (1) devant la surface d'affichage (3) comprenant la représentation graphique affichée, dans lequel le document de valeur (1) comprend une caractéristique de sécurité pourvue d'une barrière visuelle (210), qui permet de découvrir différentes parties d'information situées derrière la barrière visuelle (210) lors d'une observation par transparence pour différentes géométries d'observation, dans lequel la barrière visuelle (210) est intégrée dans le document de sécurité (1) de telle sorte qu'il est possible de voir par transparence au travers de la barrière visuelle (210) et du document de sécurité (1) une partie d'information se trouvant derrière le document de sécurité (1) au moins pour une géométrie d'observation,
    dans lequel la représentation graphique comprend au moins une première partie d'image partielle (101) pour l'au moins une géométrie d'observation, et dans lequel au moins une deuxième partie d'image partielle (102) est affichée sur la surface d'affichage (3) en plus de l'au moins une première partie d'image partielle (101), dans lequel la première partie d'image partielle (101) est représentée en une réalisation monochrome homogène, laquelle entraîne un premier effet coloré, et l'au moins une deuxième partie d'image partielle (102) est représentée, laquelle est réalisée de manière monochrome homogène et entraîne un deuxième effet coloré différent du premier effet coloré,
    détecter au moins deux représentations du document de sécurité (1) devant le dispositif d'affichage (4) pour au moins deux géométries d'observation différentes en ce qu'au moins une première représentation est détectée pour une première géométrie d'observation et une deuxième représentation est détectée pour une deuxième géométrie d'observation divergeant de la première géométrie d'observation,
    évaluer les au moins deux représentations détectées, dans lequel lors de l'évaluation des au moins deux représentations on vérifie si les représentations comprennent la première et la deuxième partie d'image partielle (101, 102) de telle manière que la première représentation et la deuxième représentation peuvent se compléter pour former une image globale
    et l'image globale pour une personne qui observe provoque, du fait d'un mélange de couleurs, une impression colorée monochrome, qui est différente du premier et du deuxième effet coloré, et
    déduire une décision de vérification, dans lequel le résultat de vérification dépend du fait de savoir si l'image globale provoque l'effet coloré monochrome différent du premier et du deuxième effet coloré ou pas.
  2. Procédé selon la revendication 1, caractérisé en ce que la détection des représentations est effectuée selon différentes géométries d'observation en ce que les représentations sont détectées selon différentes directions d'observation.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une surface monochrome est représentée sur l'écran en tant que première partie d'image partielle (101) et une surface monochrome est représentée sur l'écran en tant que deuxième partie d'image partielle (102).
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les directions d'observation varient pour la prise des deux représentations ou plus.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la représentation de l'au moins une partie d'image partielle (101) et/ou de l'au moins une deuxième partie d'image partielle (102) varie sur le système d'affichage, et plusieurs paires de représentations sont évaluées.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble du document de sécurité (1) varie devant la surface d'affichage (3) et les au moins deux représentations détectées sont évaluées au moins par paire, dans lequel les au moins deux représentations évaluées respectivement au moins par paire sont telles qu'elles sont détectées de manière simultanée ou au moins pour la même orientation du document de sécurité (1) par rapport à la représentation sur la surface d'affichage (3) selon les au moins deux directions d'observation différentes les unes des autres.
EP12783164.2A 2011-10-19 2012-10-19 Procédé de vérification d'un document de sécurité par une barrière visuelle à l'aide d'un dispositif d'affichage Active EP2769364B1 (fr)

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DE102011084818A DE102011084818A1 (de) 2011-10-19 2011-10-19 Verfahren zur Verifikation eines Sicherheitsdokuments mit einer Sichtbarriere unter Verwendung einer Anzeigevorrichtung
PCT/EP2012/070804 WO2013057280A1 (fr) 2011-10-19 2012-10-19 Procédé de vérification d'un document de sécurité par une barrière visuelle à l'aide d'un dispositif d'affichage

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FR3067845B1 (fr) * 2017-06-14 2019-07-12 Safran Identity & Security Procede d'authentification d'un document comportant une fenetre transparente, procede pour realiser des transactions et dispositif pour la mise en œuvre
DE102019122586B4 (de) * 2019-08-22 2021-04-08 Bundesdruckerei Gmbh Mikrostrukturiertes transparentes Sicherheitselement
DE102019123691A1 (de) 2019-09-04 2021-03-04 Bundesdruckerei Gmbh Verfahren zur prüfung der echtheit eines sicherheitsdokuments

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DE3445973A1 (de) * 1984-12-17 1986-06-19 Philips Patentverwaltung Gmbh, 2000 Hamburg Anordnung zur erzeugung eines bildes
DE102004026557A1 (de) * 2004-05-27 2005-12-22 Arno Oesterheld Authentifizierungsverfahren und Authentifizierungssystem
DE102004051919A1 (de) * 2004-10-25 2006-04-27 Giesecke & Devrient Gmbh Sicherheitselement mit transparentem Träger
ES2428360T5 (es) * 2004-08-12 2019-04-16 Giesecke Devrient Currency Tech Gmbh Elemento de seguridad con soporte
GB0514701D0 (en) * 2005-07-18 2005-08-24 Rue De Int Ltd Decoding device
DE102006054651A1 (de) * 2006-11-17 2008-05-21 Giesecke & Devrient Gmbh Sicherheitsanordnung mit Flüssigkristallschicht
DE102007037576A1 (de) * 2007-08-09 2009-02-12 Giesecke & Devrient Gmbh Verifikation von Sicherheitselementen mit Fenster
WO2011015384A1 (fr) * 2009-08-04 2011-02-10 Giesecke & Devrient Gmbh Dispositif de sécurité
FR2961622B1 (fr) * 2010-06-22 2013-02-08 Arjowiggins Security Procede d'authentification et/ou d'identification d'un article de securite.

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