EP3922473A1 - Procédé de production d'une image imprimée sur un support de données pour un document de sécurité ou de valeur - Google Patents

Procédé de production d'une image imprimée sur un support de données pour un document de sécurité ou de valeur Download PDF

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Publication number
EP3922473A1
EP3922473A1 EP21177288.4A EP21177288A EP3922473A1 EP 3922473 A1 EP3922473 A1 EP 3922473A1 EP 21177288 A EP21177288 A EP 21177288A EP 3922473 A1 EP3922473 A1 EP 3922473A1
Authority
EP
European Patent Office
Prior art keywords
image
printed
photo
data carrier
data
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.)
Pending
Application number
EP21177288.4A
Other languages
German (de)
English (en)
Inventor
Oliver Muth
Ralf Grieser
Michael Knebel
Franziska Peinze
Alexander Gräf
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102020115635.9A external-priority patent/DE102020115635A1/de
Priority claimed from DE102020133826.0A external-priority patent/DE102020133826A1/de
Application filed by Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP3922473A1 publication Critical patent/EP3922473A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/305—Associated digital information
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the invention relates to a method for producing a printed photo on a data carrier for a security or value document which is protected against forgery, and the security or value document.
  • the invention also relates to a method for checking the authenticity of an image printed on the data carrier.
  • Security documents such as identity cards, driver's licenses or passports, which can be in the form of data carrier cards or as book-like documents, have photographs as a security feature.
  • the data from the digitized photos are processed using the Raster Imaging Process (RIP).
  • the image visible in the security document is printed with colored inks in the three standardized optimal colors cyan, magenta, yellow and black.
  • photos In order to detect manipulation of the photos, it is customary to provide photos with security features, which can be provided, for example, in a zone in the image to be applied.
  • Security documents are among other things. falsified by applying a photo of another person over the photo of the document holder or the photo is changed / manipulated in such a way that identity theft by another person becomes possible.
  • the photo of the other person can be applied directly, for example, by printing the actual photo directly onto the card surface using an inkjet printing process, or indirectly by first printing on a transfer film and then laminating the image over the actual photo .
  • Particularly good forgeries leave the other security features such as luminescent negative pressure or kinematic holographic structures (Identigram) largely intact, so that the document looks virtually unmanipulated or a little aged.
  • Manipulated documents often have a destroyed chip or the special access rights to the file for the photo in the chip are not guaranteed by the control level, so that the authenticity of the photo cannot always be verified via the electronic component.
  • a method for producing security features and their authentication is known in which a first piece of information is made available as an open machine-readable first graphic code and further information is made available as a further graphic code that is embedded in a two-dimensional complex function that becomes a function Fourier -transformed and the function is binarized to a second image, wherein the first and the second image are linked to one another. This is intended to make copying security features more difficult.
  • the DE 10 2014 214 548 A1 teaches a method for producing a document, in which a document layer is printed with a color, the color is dried, the color in the area taking on a random surface structure due to the drying and the surface structure randomly created as a result of the drying being optically detected and encoded in a code value and is stored as a security feature.
  • the invention is based on the object of specifying a method for the production of data carriers for security or value documents with photos that are secured against manipulation regardless of the functionality of a chip, to provide such security and value documents and a method for recognizing tampering with the Specify security and value documents that can be carried out in a simple manner.
  • data carriers for security documents and documents of value are secured against manipulation of the photos in that image-specific results are calculated from the image, the positions of the image-specific results are determined in relation to a control mark on the data carrier and the image-specific results and their position in the form of a preferably graphic Data codes are stored on the data carrier. The integrity of the data code can also be ensured by a digital signature contained therein.
  • the image-specific results are, for example, contours, support contours or landmarks that are calculated from the photo and represent a type of "fingerprint" of the respective photo.
  • the printed photo is preferably additionally encoded with the image-specific results, i.e. the contours, landmarks or the fingerprint of the photo, in a detectable form, in particular with a transparent IR-absorbing or luminescent ink.
  • the image-specific results and their position in relation to the control mark can be calculated from the printed photo using the same algorithm and compared with the read out data code. If the data record of the subsequent recording and the data code match, no manipulation of the printed image has taken place. If this is not the case, there is manipulation.
  • the correspondence of the Image-specific results calculated from the printed photo can be checked with the image-specific results encoded in the photo in a detectable form, ie the contours, supporting contours or landmarks.
  • the image is coded both with the data code and with the image-specific results. This is particularly preferably done by simultaneously printing the photo, the image-specific results, in particular the contours with an ink that is transparent and luminescent or IR-absorbing in the visible spectral range, and the graphic data code, which can be colored or transparent in the visible spectral range.
  • This variant is characterized by a particularly high level of security, since both security features are printed together with the picture and are therefore part of the picture itself and the two security features also correspond to one another.
  • the control marking is defined by the image itself.
  • the coding takes place with the data code on the data carrier outside of the photograph.
  • the coding with the data code can take place after the photo has been printed, with the image-specific results also being able to be printed in the photo at the same time.
  • a control mark is to be defined or provided on the data carrier when data is encoded outside of the photograph.
  • the data code can preferably also be signed or encrypted within a PKI. This means that a forger not only has to forge the contours and ensure that they can be detected under UV or IR radiation, but also change the data code and bypass its encryption in the process.
  • the authenticity of the photo can also be checked by the fact that the match the photo is checked with the image-specific results stored in the photo and / or the correspondence of the image-specific results stored in the image with the data coding is checked, for example under UV or IR irradiation.
  • steps a) to e) for the production of the data carrier with the printed photo and the data code are described and then the optional additional step f), the production of the additional coding of the printed photo for the production of the doubly secured photo with the calculated Describes image-specific results.
  • a photo based on the data of a digitized photo is printed on the data carrier.
  • a control mark is also provided on the data carrier.
  • data carrier means both a substrate layer which Data carries, understood as a data carrier comprising several substrate layers, in particular in the form of a card.
  • the visible light image can be printed in a known manner using colored inks.
  • the control mark is used to define a data carrier-internal coordinate system.
  • the control mark can be provided on the data carrier, for example, by printing a control mark with visible or invisible ink. It is advantageous and preferred to apply the control marking in the same method step as the photograph itself, in order to keep position tolerances as low as possible.
  • the control mark which is also referred to as a "fiducial mark" can be defined by a marking, in particular a printed mark, a cross, a star, a letter, a number or some other position applied to the photo or to another location on the data carrier , but also by a corner point or focus of a design or sovereign element such as the federal eagle, the country code "DE” or the like.
  • the control marking can also be defined by the printed photo itself or also by a position on the data carrier itself, for example a corner or edge position or a position of a rounded edge. The control mark is used to determine the absolute position of the respective image-specific results on the data carrier.
  • the position of the control mark can be freely selected. However, once it has been established, its position must be used as a basis for each verification.
  • the control mark defines the origin of a data carrier-internal coordinate system, by means of which the positions of the individual image-specific results are defined in the data carrier-internal coordinate system.
  • the zero point of the map's internal coordinate system can, for example, be the center of gravity of a sovereign symbol such as the federal eagle, which is on different layers of the Data carrier can be printed (UV, VIS, IR, hologram).
  • control marking can be arranged in the same layer as the light image, but also in a different layer.
  • the printed image In order to be able to calculate the image-specific results from the printed photo, the printed image must first be read out. The reading or extraction can take place, for example, with a document checking device, a camera or a scanner. The image-specific results are then calculated from the data obtained.
  • the image-specific results can also be calculated directly from the data of the digitized photo.
  • image-specific results include all possible image-specific results that can be determined from the respective image or portrait, such as the contours of a face, the position of individual, specific points on a face or the clothing, jewelry, etc. of the data carrier holder that is visible in the image, or other specific results (landmarks) calculated from the color or brightness contrasts of the image or individual areas of the image, which can be uniquely calculated by calculation using a specific algorithm from the printed and / or the data of the digitized image (a).
  • the image-specific results can be calculated from the printed image or the data from the digitized image, for example, using Canny-Edge detection (Canny or Canny-Edge algorithm).
  • Canny-Edge (or Canny) -Detection is a robust algorithm for edge detection that is widely used in digital image processing. It is divided into various convolution operations and provides an image which ideally only contains the edges of the original image.
  • the image-specific results can also be calculated using landmarks detection. For example, the positions of individual, specific points on a face are calculated in relation to the data carrier's internal coordinate system.
  • the image-specific results and the positions of the respective image-specific results defined on the basis of the control mark are stored as a data code on the data carrier.
  • the data code is preferably a graphic code, for example a matrix code, in particular a DataMatrixCode (DMC), but also a barcode or a QR code.
  • DMC DataMatrixCode
  • the data code is introduced into the data carrier, for example in the same substrate layer as the printed image and / or the control mark or in a different substrate layer. It can be both visually perceptible and visually imperceptible.
  • the graphic code is preferably printed onto the data carrier or a substrate layer, for example with a visible or visually invisible ink that is luminescent when exposed to UV radiation or with a transparent ink that absorbs in the infrared.
  • the graphic code can also be introduced into the data carrier by means of a laser or in some other way, but in this case a lower accuracy is achieved compared to the variant with the joint printing of the image and the data code.
  • the data code may be stored on the chip of the data carrier, for example as a barcode.
  • the data code preferably contains a signature of the image-specific values in order to ensure its integrity.
  • the graphic code can be arranged outside of the photograph or else in the photograph.
  • the calculated image-specific results can also be coded into the data of the digitized image during the image acquisition. This can be done e.g. by using the LSB (last significant bit). In this way, the contour information belonging to the image is documented in a comprehensible manner throughout the entire process and can safeguard this process.
  • the coding of the data of the digitized image with the image-specific results can of course also take place independently of the printing of the image and secure the data of the digitized image as such.
  • the production of the data carrier with the printed photo, the data code and the additional coding in the printed image provides that the printed image is additionally encoded with the results calculated from the data of the digitized image in a detectable form according to step f) will.
  • the image-specific results In order to be able to check the correspondence of the visible light image printed in step b) with the image-specific results coded in the image, the image-specific results must be detectable.
  • the image-specific results can be printed in the printed image, in particular by means of an ink that is invisible in the visible spectral range and luminescent under UV radiation, or with an im Infrared absorbing (IR-A, IR-visible) ink, if the other components of the light image are infrared-transparent (IR-T).
  • IR-A, IR-visible im Infrared absorbing
  • IR-T infrared-transparent
  • the coding of the image-specific results can also be introduced into the layer area above the printed image in the form of a hologram or a milling or in another form that can be perceived or measured visually or haptically, for example.
  • the authenticity of the image can be checked solely on the basis of the image or the layer area above the image.
  • coding of the printed image also includes the coding of a layer located above the image.
  • the coding is not in the image itself, but in an area in one or more layers above, ie above the image, i.e. either in an area of a layer of the data carrier between the image and the visible side of the data carrier or in the visible side of the data carrier itself above the image, the image is first printed and then the coding takes place in the area in one or more layers above the image.
  • Image contours can also be provided as a hologram or volume hologram, with a carrier layer film, such as a holographic film, exposed to the image-specific results, in particular the contours, and then applied, glued and sealed to the photograph with a precise fit.
  • a carrier layer film such as a holographic film
  • the image-specific results are removed from a layer area above the image, in particular on the visible side of the data carrier, for example by laser ablation.
  • a data carrier card with a photograph is obtained in which the contours milled into the visible side as tactile depressions in a real document match the contour of the underlying photograph with an exact fit.
  • the image is printed and, independently of this, the coding takes place with the image-specific results of the image in a carrier layer film, which is then positioned and fixed above the image.
  • the coding can be visible or invisible in visible light. Invisible coding has the advantage that it is useful for the Counterfeiters are not easy to spot.
  • the coding of the printed image with the image-specific results in step f) can take place in the visible image, preferably simultaneously with the printing of the digitized image (step b), but also before or after the printing of the visible image.
  • the data carrier has, in addition to the (graphic) data code, a printed image in which the image-specific results calculated from the data of the digitized image are imprinted by means of a transparent luminescent ink, that is, the printed image itself is only through a coding visible under UV irradiation.
  • the image in addition to the visible image, the image also has an invisible luminescent contour image which can be made visible under a UV source and thus the correspondence of the contour image with the visible image can be checked.
  • the visible image is thus overprinted with its own invisible contour image.
  • a contour image is provided via a luminescent dye that is only visible through UV irradiation makes photo manipulation visible through film overlay or by overprinting under UV light, since the unambiguous contour calculated from the data of the digital image only fits the printed light image . If the photo is manipulated in the visible, the contour would no longer match the manipulated photo and the forgery would be uncovered.
  • the photo can be additionally (invisibly) coded using image-specific results and thus secured.
  • the contours can also be printed with an ink that is invisible in the visible spectral range but absorbs in the infrared (IR-A, IR-visible) if the other components of the light image are infrared-transparent (IR-T ) are.
  • IR-A infrared
  • IR-T infrared-transparent
  • the contour or landmark image is preferably printed with the transparent and luminescent or IR-absorbing ink together with the printing of the visible image with the colored inks in step b).
  • a further color channel (spot color) for the luminescent or IR absorbing ink is provided in the printer so that all inks can be printed at the same time.
  • the result is an image that is a "normal" image of the document holder in daylight or when irradiated with white visible light, but only the relevant contours or landmarks of the image are visible as luminescent or IR absorption lines under UV excitation or IR irradiation power.
  • contour or landmarks image can also first be printed with the transparent and luminescent or IR-absorbing ink and only then can the visible image be printed into the contour or landmarks image or the visible image can be generated first and then into the visible image the contour or landmarks image can be printed.
  • the contour or landmarks image is printed with the luminescent or IR-absorbing transparent ink on a first carrier layer, for example based on polycarbonate, and the visible image with the colored inks on a second carrier layer, preferably also based on polycarbonate.
  • the carrier layers are then positioned with respect to one another and then joined together, in particular laminated with an increase in temperature and pressure, as in FIG DE 10 2007 052 947 A1 described.
  • all inks can be used as transparent luminescent or IR-absorbing inks to which the desired dyes that are absorbent in the UV and luminescent in the visible spectral range and soluble or the dyes that are transparent in the visible spectral range and absorbent in the IR are added, which are added for printing the respective data carrier are suitable.
  • the proportion of dyes is preferably up to 10% by weight.
  • Such inks contain up to 20% by weight of a binder with a polycarbonate based on a geminally disubstituted dihydroxydiphenylcycloalkane, at least 30% by weight of an organic solvent, up to 10% by weight, based on the dry weight of a colorant or colorant mixture, and optionally functional materials, Additives and / or auxiliaries.
  • Preferred solvents are hydrocarbons and / or ketones and / or organic esters.
  • inks can be printed on polycarbonate polymer layers with inkjet printers and then laminated to form a composite with impressive optical properties.
  • the colorants or colorant mixtures are luminescent dyes.
  • Luminescent dyes are understood to mean substances that fluoresce, phosphoresce or afterglow.
  • the luminescent dye should not absorb or only absorb very slightly in the visible spectral range.
  • the Luminescent dye be an inorganic or an organic substance, organic luminescent dyes being preferred.
  • the luminescent dye must be excitable with UV radiation and soluble in the respective solvent of the ink.
  • the luminescent dye or dyes can emit in the visible spectral range in different colors such as yellow, red, green, but also in mixed colors or even almost white.
  • composition and, if necessary, concentration ratios of one or more luminescent dyes and their excitation and emission wavelengths special luminescences can also be generated, which can be detected visually under a UV lamp, but also spectroscopically and can represent a further security feature. If several luminescent dyes are provided which differ in their excitation and emission wavelengths, different luminescent colors can also be generated with different excitation wavelengths in the UV.
  • Such a data carrier thus contains a photo and two codes, both of which are based on the image-specific results of the photo, but which are encoded in a different form.
  • These two different codings based on the same features complement each other in such a way that if there are difficulties in decoding one code, the authenticity of the photo can still be determined using the other code, for example because the special document checking devices required are not available.
  • a major advantage of this variant of the security and value document according to the invention with two complementary codings consists in the fact that the photo as such is encoded invisibly via characteristic image-specific image elements and thus secured, and a (different) image-specific coding of the same photo is stored in a separate data code, for example a graphic data code such as a matrix code.
  • a separate data code for example a graphic data code such as a matrix code.
  • the data carrier comprises one or more layers made from the following polymers or their derivatives, namely from polycarbonate, bisphenol A polycarbonate, carboxy-modified PC, polyesters such as polyethylene terephthalate (PET), its derivatives such as glycol-modified PET (PETG), carboxy-modified PET , Polyethylene naphthalate (PEN), vinylic polymers such as polyvinyl chloride (PVC), polyvinyl butyral (PVB), polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polystyrene (PS), polyvinyl phenol (PVP), polypropylene (PP), polyethylene (PE), polyacrylonitrile butadiene styrene , Polyamides, polyurethanes, polyureas, polyimides or thermoplastic elastomers (TPE), in particular thermoplastic polyurethane (TPU), acrylonitrile-butadiene-styrene copolymer (ABS), and / or paper and
  • the product can also be made from several of these materials. It is preferably made of PC, PET and / or PVC.
  • the polymers can be either filled or unfilled. In the latter case, they are preferably transparent or translucent. If the polymers are filled, they are opaque.
  • the above information relates both to films to be bonded together and to liquid formulations that are applied to a preliminary product, such as a protective or topcoat.
  • the document is preferably produced from 3 to 12, preferably 4 to 10, substrate layers (foils), preferably using a lamination process in which the substrate layers are fused to one another under the action of pressure and heat.
  • the individual foils can be made from the same material or from consist of different materials. Overlay layers formed in this way protect a security feature arranged underneath and / or give the document the required abrasion resistance.
  • step f) can already take place after step b), or steps b) and f) or parts of steps b) and f) can take place simultaneously, or step c), second alternative, can take place before step b).
  • the invention also relates to a method for checking the authenticity of a printed photo on a data carrier of a security and value document, which comprises a printed photo, a control mark and a data code based on the image-specific results of the printed photo and the position of the control mark, the printed The light image is read out, the position of the control mark is determined, the image-specific results and their position are calculated and compared with the values stored in the data code.
  • the signature of the data code can also be checked.
  • the invention also relates to a method for checking the authenticity of a printed image on a data carrier of a security and value document containing a printed photo, image-specific results encoded in the printed photo in a detectable form, such as a transparent luminescent or IR-absorbing one printed in the photo Contour image, a control mark and a data code based on the image-specific results of the printed light image, for example the contour image, and the control mark, the printed Photo and the detectable image-specific results encoded in the printed photo, for example a luminescent or IR-absorbing contour image, read out and from the image-specific results read out and the position of the control mark or from the image-specific results calculated from the printed photo read out and the position of the Control mark values are calculated, and these calculated values and their position are compared with the values stored in the data code.
  • a detectable form such as a transparent luminescent or IR-absorbing one printed in the photo Contour image
  • a control mark and a data code based on the image-specific results of the
  • the printed visible light image is a forgery because the image-specific results calculated or read out from it do not match the data code in the coordinate system defined by the control mark, for example because the original light image was overprinted.
  • the calculation should be carried out with the same algorithm as the original calculation of the image-specific results from the data of the digital photo.
  • the authenticity of the data carrier can be checked with a document checking device, a smartphone, a device with a camera, if necessary with a flash or a scanner for reading out the printed image, software for evaluating the graphic code, software for calculating the image-specific results and possibly a UV or IR light source.
  • the authenticity of the coded visible light image is preferably checked in an automated manner.
  • the verification of the detectable coding insofar as it is visible in the visible spectral range or can be made visible by exposure to electromagnetic radiation, such as UV or IR radiation, can also be done visually.
  • the detectable code in the printed image is visible in daylight because it is printed with colored ink, or can be made visible under electromagnetic radiation because it is printed, for example, with an ink that is visible under UV or IR radiation
  • the check is carried out Correspondence of the printed image with the detectable coding, preferably visually in daylight, for example with an RGB camera with white light irradiation or in daylight with additional electromagnetic, in particular UV or IR irradiation.
  • a digital recording of the printed colored photo in the security document can be made during verification in order to calculate the expected contours for the printed photo from the digital data of the printed image.
  • the expected contours are then compared with the luminescence contour image of the printed image measured under UV irradiation. If the contours match, the photograph is real.
  • the document is excited, e.g. with UV radiation, for example with a wavelength of 365 nm, and the luminescence image of the contour image is recorded and this is compared with the expected contours calculated from the photo.
  • Correspondences between the measured contour image printed with the luminescent ink and the contours calculated from the RGB image verify the light image or, if they do not correspond, indicate a manipulation.
  • the digital recording of the printed photo in the security document should take place under the same conditions as the production of the original digital image, ie under white light, preferably with an RGB camera.
  • the method described also works if, instead of the luminescent inks, an ink is used that is only absorbent in the infrared and is otherwise largely transparent.
  • an ink is used that is only absorbent in the infrared and is otherwise largely transparent.
  • a relevant known IR camera is to be used on the detection side and the image comparison takes place between the image visible in the visible spectral range and the IR contour image.
  • the material basis for this are so-called transparent NIR absorbers.
  • Security documents in the form of book-like documents such as passports, for example, comprise, in addition to the laminated data carrier, a book cover and a book block which includes the data carrier.
  • the invention also relates to a security or value document comprising a data carrier with a control mark on which a photo is printed and on which a data code is stored which is based on the image-specific results of the photo and the position of the control mark.
  • the invention also relates to a security or value document comprising a data carrier with a control mark on which a photo is printed, in which photo-specific results are encoded in a detectable form and on which data carrier a control mark is applied and on which data carrier a data code, in particular a graphic one Code, is stored, which is based on the image-specific results of the photograph and the position of the control mark.
  • the invention further relates to such a security or value document which is produced in particular according to one of the methods described above.
  • a light image 15 printed based on the data of a digitized image 10 is shown and in b) a contour image 13 calculated from the printed light image 15.
  • the calculation of the contours can be done, for example, with Canny Edge Detection or another suitable algorithm.
  • the contour image 13 has a large number of contours K 1 ... K n which differ in their length, their course, their curvature, their position, etc. Examples are in Figure 1b ) three contours K 1 , K 2 , K 3 are drawn.
  • a specific value W 1 ... W n can be calculated for each contour K 1 ... K n.
  • the specific values W 1 ... W n of the contours K 1 ... K n are the position of the respective center of gravity (center X, Y) of the contour and the length L of the respective contour.
  • the position of the center of gravity 50 is specified in relation to a data carrier-internal coordinate system 52 which, in this example, is based on the center of gravity 50 of the position of the federal eagle 51 shown in FIG Figure 2 is shown is based.
  • the center of gravity 50 of the federal eagle 51 is the tax marking 50 in this example.
  • the specified length corresponds to the number of pixels times the pixel size of the associated contour line.
  • Figure d shows the coding of the values W 1 ... W 29 from Figure 1c ) as DataMatrixCode (DMC) 60, which is preferably signed.
  • DMC DataMatrixCode
  • Figure 2 shows in Figure 2a ) schematically the visible side 28 of a data carrier 20 with federal eagle 51, photo 15 and the internal data carrier DMC code 60 based on the image-specific results and the position of the federal eagle 50, which is also printed on the visible side 28.
  • the center of gravity 50 of the federal eagle 51 is the control mark 50 and defines the position of the zero point of the data carrier-internal coordinate system 52.
  • the positions of the focal points 50 of the contours K n are determined in relation to the data carrier-internal coordinate system 52 defined by the focal point 50 of the federal eagle 51. This is schematically shown in Figure 2b shown.
  • the positions of the centers of gravity of the contours K n are then stored on the data carrier 20 in the matrix code 60.
  • the matrix code 60 is printed on the data carrier 20 in this exemplary embodiment with transparent ink 22 absorbing in the near infrared (NIR). However, it can also be applied to the data carrier 20 with a luminescent ink 24 or in some other way and / or also be stored in the electronic chip of the data carrier 20.
  • NIR near infrared
  • a data carrier 20 During the production of the data carrier 20, a data carrier 20, a substrate or a data carrier layer 27 is provided and these are printed with the federal eagle 51 and the image 15 with colored ink 16, 17, 18, 19. It is irrelevant here whether the federal eagle 51 or the photograph 15 or both are printed first. Federal eagle 51 and photo 15 can also be printed on different layers of data carrier 20.
  • the center of gravity 50 of the federal eagle 51 which in the present case is the control marking 50 and defines the zero point of the data carrier-internal or substrate-internal coordinate system 52, is then determined, and the image-specific results are calculated, namely the contours K 1 ... K n and the contour-specific values W 1 ... W n , as in Figure 1 and the matrix code 60, which is signed and added to the data carrier 20 in a further personalization step.
  • the image-specific values 12 are first calculated from the data of the digitized image 10 and, based on the position of the control mark 50, the data code 60 is calculated. Image 15, control mark 50 and data code 60 are then printed on data carrier 20, preferably at the same time.
  • Figure 3 is a preferred variant of a data carrier 20 with two codings, namely that already in Figure 2 described matrix code 60 based on the contour image 13 and the data carrier-internal coordinate system 52 and the contour image 13 printed in the light image 15, preferably with a transparent luminescent ink 24 that is only visible under UV radiation.
  • the data carrier 20 thus has two security features based on the data of the digitized image 10.
  • the two codes correspond and can both be recorded with a suitable recording device such as a camera or a scanner and evaluated with the appropriate software and are therefore independent of the functionality of a data chip.
  • the image-specific results (contours) 12 and - based on the desired position of the control mark 50 - the data code 60 are first calculated from the data of the digitized image 10 and then the Photo 15 with colored ink 16, 17, 18, 19, the contour image 13 with transparent and UV-luminescent ink 24, preferably via an additional color channel, printed in the photo 15 and preferably also in the same printing process at the same time the control mark 50 and the matrix code 60, the matrix code 60 preferably being printed with a transparent, IR-absorbing ink 22 and the control mark 50 with a colored ink 16, 17, 18, 19.
  • control mark 50 can likewise be printed in the light image 15 itself, but also outside of the light image 15.
  • Figure 4 shows schematically the production of the contour image 13 visible only under UV irradiation in the light image 15 from Figure 3 .
  • the contours are obtained from the data of the digital image 10 by means of the Canny Edge Detection calculated.
  • specific contours or support structures are calculated from the portrait and output as a separate contour image 13 (“Canny contour”).
  • This contour image 13 is prepared as a separate color channel (spot color) during printing and simultaneously with the colored colors (cyan, magenta, yellow, core (CMYK)) with transparent luminescent ink 24, which is only visible under UV radiation (“spot”), printed.
  • spot color cyan, magenta, yellow, core (CMYK)
  • the production of the data carrier 20 from Figure 3 with the matrix code 60 and the contour image 13 imprinted in the light image 15 with ink 24 only visible in UV takes place in a manner similar to the production of the data carrier 20 from Figure 2 .
  • the data of the digitized image 10 is first used to create the contour image 13 corresponding to the first Step in Figure 4 generated, and only then are federal eagle 51, visible image 15 and, with the invisible ink 24, the contour image 13, which is only visible under UV irradiation, printed in the light image 15, as in FIG Figure 4 explained.
  • the center of gravity 50 of the Federal eagle 51 and the light image 15 and / or the contour image 13 are then from the position of the specific values of W ... W the substrate or the data carrier layer deposited 1N calculated as signed matrix code 60 in the data carrier 20 and 27 respectively .
  • Figure 5 shows the structure of a data carrier 20 of a security document 21, which consists of a printed photo 15 and several layers 27 which are laminated to one another to form a composite.
  • the printed photo 15 is located within the layer composite in layer 27 ′′.
  • the center of gravity 50 of federal eagle 51 which represents control marking 50 in this example, is drawn in on the right-hand side, and in layer 27 ", namely the layer with the imprinted photo 15, the calculated matrix code 60 is shown schematically.
  • the contour image 13 is also imprinted with the transparent luminescent ink 24 that is visible under UV radiation.
  • the matrix code 60 is printed in the layer 27 ′′ with ink 22 which is visible under IR radiation.
  • the verification of the light image 15 in the data carrier 20 with respect to the printed visible light image 15 can take place under daylight, with respect to the luminescent contour image 13 under UV irradiation and with respect to the matrix code 60 under IR irradiation.
  • the layers 27, 27 ', 27 ", 27'" are laminated to form a composite.
  • the contours 13 are now laser ablation or a precise fit in the finished data carrier 20 with a suitable laser 40, for example a CO 2 laser (wavelength 10 micrometers) or a CO laser (wavelength 5 micrometers) generated.
  • the result is a data carrier 20 in which the contours 13 are milled precisely above the printed light image 15, the contours representing more or less tactile depressions.
  • a holographic film 26, that is to say a carrier layer film 26, is shown on the left-hand side, in which the calculated contours are exposed by means of a laser 40 to produce a hologram 13.
  • the holographic film 26 is then applied precisely to the data carrier 20 above the printed image 15, connected to the data carrier 20 by means of an adhesive layer 29, and the surface is then sealed with a scratch-resistant varnish 30.
  • the result is a data carrier 20 with a photo 15 and precisely fitting holographic contours above the photo 15.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
EP21177288.4A 2020-06-12 2021-06-02 Procédé de production d'une image imprimée sur un support de données pour un document de sécurité ou de valeur Pending EP3922473A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102020115635.9A DE102020115635A1 (de) 2020-06-12 2020-06-12 Verfahren zur Herstellung eines gedruckten Bildes auf einem Datenträger für ein Sicherheits- oder Wertdokument
DE102020131879 2020-12-01
DE102020133826.0A DE102020133826A1 (de) 2020-12-16 2020-12-16 Verfahren zur Herstellung eines gedruckten Bildes auf einem Datenträger für ein Sicherheits- oder Wertdokument

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Cited By (1)

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DE102007052947A1 (de) 2007-10-31 2009-05-07 Bayer Materialscience Ag Verfahren zur Herstellung eines Polycarbonat-Schichtverbundes
DE102013113340A1 (de) 2013-12-02 2015-06-03 Adorsys Gmbh & Co. Kg Verfahren zum Authentifizieren eines Sicherheitselements und optisch variables Sicherheitselement
EP2930699A1 (fr) * 2014-03-18 2015-10-14 Binder Consulting GmbH Caractéristique de sécurité comprenant une section de code et de marquage
DE102014214548A1 (de) 2014-07-24 2016-01-28 Morpho Cards Gmbh Verfahren zur Herstellung eines Dokuments
EP2101986B1 (fr) 2007-01-17 2017-03-22 Basf Se Absorbeurs ir incolores à base de complexes métalliques de dithiolène
EP3388250A1 (fr) * 2017-04-13 2018-10-17 tesa scribos GmbH Caractéristique de sécurité à protection contre la copie
DE102017206487A1 (de) 2017-04-18 2018-10-18 Eberspächer Catem Gmbh & Co. Kg PTC-Heizelement und Verfahren zu dessen Herstellung

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Publication number Priority date Publication date Assignee Title
US20030173406A1 (en) * 2001-12-24 2003-09-18 Daoshen Bi Covert variable information on identification documents and methods of making same
EP2101986B1 (fr) 2007-01-17 2017-03-22 Basf Se Absorbeurs ir incolores à base de complexes métalliques de dithiolène
DE102007052947A1 (de) 2007-10-31 2009-05-07 Bayer Materialscience Ag Verfahren zur Herstellung eines Polycarbonat-Schichtverbundes
DE102013113340A1 (de) 2013-12-02 2015-06-03 Adorsys Gmbh & Co. Kg Verfahren zum Authentifizieren eines Sicherheitselements und optisch variables Sicherheitselement
EP2930699A1 (fr) * 2014-03-18 2015-10-14 Binder Consulting GmbH Caractéristique de sécurité comprenant une section de code et de marquage
DE102014214548A1 (de) 2014-07-24 2016-01-28 Morpho Cards Gmbh Verfahren zur Herstellung eines Dokuments
EP3388250A1 (fr) * 2017-04-13 2018-10-17 tesa scribos GmbH Caractéristique de sécurité à protection contre la copie
DE102017206487A1 (de) 2017-04-18 2018-10-18 Eberspächer Catem Gmbh & Co. Kg PTC-Heizelement und Verfahren zu dessen Herstellung

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117021809A (zh) * 2023-08-15 2023-11-10 深圳市大满包装有限公司 一种基于数码印刷的二维防伪码印刷调控方法及系统

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