EP3446294B1 - Dispositif et procédé de surveillance de caractéristiques de sécurité en couleur - Google Patents

Dispositif et procédé de surveillance de caractéristiques de sécurité en couleur Download PDF

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Publication number
EP3446294B1
EP3446294B1 EP17718885.1A EP17718885A EP3446294B1 EP 3446294 B1 EP3446294 B1 EP 3446294B1 EP 17718885 A EP17718885 A EP 17718885A EP 3446294 B1 EP3446294 B1 EP 3446294B1
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Prior art keywords
color
wavelengths
wavelength
light
respect
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EP17718885.1A
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German (de)
English (en)
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EP3446294A1 (fr
Inventor
Bernhard Gruber
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QUISS Qualitaets InspektionsSysteme und Service GmbH
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QUISS Qualitaets InspektionsSysteme und Service 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
    • G07D7/1205—Testing spectral properties

Definitions

  • the present invention relates according to claim 1 to a device for checking a colored security feature produced by means of a security color on a beverage packaging, according to claim 7 to a method for checking at least one colored security feature produced by means of a security color on a beverage packaging or a beverage packaging component, according to claim 12 to a computer program product for carrying out a method according to the invention and according to claim 13 to a use of a special camera in a method according to the invention.
  • Security features are generated on objects where, for example, the origin is to be ensured. This can be the case, for example, if the respective object enables a specific authorization.
  • the beverage industry has provided defined beverage containers with a deposit that the purchaser of the beverage containers must first pay, with the deposit paid being refunded when the beverage container is returned.
  • the beverage container can be purchased from a first retailer and returned to a second retailer for reasons of practicability, and a large number of different beverage containers can be charged with the deposit, the potential number of participants on the part of retailers, manufacturers and end consumers is very large. It has been shown that criminals try to take advantage of such systems by reworking the entitlement to a deposit or trying to illegally withdraw money from the deposit system by using forged entitlements to a deposit.
  • the pamphlet WO 2008/067889 A1 discloses a device for reading and analyzing a security sign, with a color image sensor and illumination for spectral light and illumination for infrared light.
  • the color image sensor has an integrated or external computer including image processing software.
  • the valid spectral wave range of an image-like representation is checked by the color image sensor and all other invalid spectral wave ranges are classified as incorrect during the check.
  • a signal from the computer to the color image sensor belongs and supplies data to the control computer of a take-back unit in such a way that it is prompted to reject packaging with a false or counterfeit security mark.
  • This method is disadvantageous because there are first imitations of security signs in which the recorded spectral wave range is not classified as wrong.
  • the pamphlet WO2006/050367A2 discloses the testing of printed objects using a spectral analysis of the surface of the objects.
  • the determined spectral data are compared with reference data It is therefore the object of the present invention to provide a device, a method and a computer program product, as a result of which bypassing a security check is to be made significantly more difficult. This should preferably be made possible with little evaluation effort and high accuracy.
  • a device for checking a colored security feature produced by means of a security color on a beverage packaging such as a can, a bottle, in particular a PET bottle.
  • a device according to the invention comprises an illumination device for broadband illumination of at least one part of the beverage packaging or the beverage packaging component, a camera device for capturing at least five
  • each of the recordings representing a quantity of reflected light of a predetermined wavelength, the wavelength differing from one another by a predefined wavelength range at least with regard to the recordings and lie within a color change interval of the safety color and an evaluation device for determining the amount of reflected light per recorded recording and for comparing the recorded values or a mathematical processing of the recorded values with a reference criterion and for outputting a result value or result signal depending on the comparison, wherein the mathematical processing corresponds to the first derivative of a function generated from the recorded values, with a result value, the highest Describes the slope of the curve defined by the values for which the match is being determined.
  • This solution is advantageous because a special property of the security color, namely the change in the degree of reflection as a function of the respective wavelength, can be recorded very precisely and reproducibly and can be used as a security criterion. Namely, it was recognized that the change in the degree of reflection as a function of a change in the wavelength of the emitted light in a color change interval forms a special characteristic curve. This course can be recorded within a very short time using a camera device and evaluated using the associated evaluation device.
  • a security color is a color whose reflection behavior at different wavelengths is known at least in the region of the transition between absorption, reflection and transmission. Furthermore, a security color preferably has color particles and components that are monitored and released in a controlled manner.
  • Broadband illumination is preferably to be understood as the at least essentially uniform illumination with light of the wavelengths whose reflected light is recorded by the camera device.
  • the quantity of reflected light is detected for a first wavelength
  • the quantity of reflected light is also detected for a second wavelength
  • the quantity of reflected light is also detected for a third wavelength
  • the quantity of reflected light is detected for a fourth wavelength carried out, furthermore, a detection of the reflected light quantity is carried out for a fifth wavelength.
  • the wavelengths that are numerically adjacent to one another i.e., for example, wavelength 1 and wavelength 2 or wavelength 2 and wavelength 3 or wavelength 3 and wavelength 4, are preferably separated by a predefined wavelength range in each case.
  • the predefined wavelength range is preferably the same in absolute terms between all or a plurality of wavelengths that are adjacent to one another. However, it is also conceivable that the individual predefined wavelength ranges have different sizes.
  • the individual amounts of light emitted are preferably characterized by the same intensity and/or energy in each case. According to the invention, however, the individual amounts of light can be characterized by different intensities and/or energies.
  • the properties associated with each quantity of light are preferably stored in the evaluation device and are particularly preferably standardized for further processing for the evaluation.
  • the color change interval is preferably understood to be a wavelength range in which the proportion of the reflected light changes significantly with increasing wavelength.
  • the reference criterion defines a value or data range that maps predetermined deviations from ideal reflection data.
  • the ideal reflection data are preferably to be understood as product properties of the ideally composed security color.
  • the deviations are preferably determined in such a way that tolerable reflection values for the individually defined wavelengths result, for example, from permissible deviations resulting from the ideal composition of the security color.
  • This embodiment is advantageous because very precise tolerance ranges can be defined. Such tolerance ranges are required because the security feature may be altered from a state immediately after creation as a result of use or contamination or environmental conditions such as exposure to sunlight.
  • the mathematical processing corresponds to the first derivation of a function generated from the recorded values.
  • This is advantageous since the entirety of the recorded values or a specific selection of the recorded values can be made process-technically manageable in such a way that a result value that describes the highest slope of the curve defined by the values can be determined for the comparison.
  • the highest slope of the mathematical function generated from the values is preferably determined or output or further processed with reference to the amount of light reflected and/or to the wavelength at this point.
  • the mathematical processing of the second derivative can correspond to a function generated from the recorded values.
  • the camera device is preferably designed in such a way that the recordings can be recorded simultaneously. This can be done, for example, by several cameras being part of the camera device, with one or exactly one or at least one camera preferably being provided for each value to be recorded. Each camera is preferably provided with a filter which blocks the light recorded by the respective camera a predetermined wavelength or a predetermined range of wavelengths. Alternatively, the camera can be in the form of a hyperspectral camera that enables detections for predetermined wavelengths. At least or exactly 5 or at least or exactly 9 or at least or exactly 16 or at least or exactly 25 or at least or exactly 30 acquisitions with the camera device are preferably possible at the same time.
  • the camera device must be designed in such a way that the recordings are generated offset in time by less than 1000 ⁇ s or less than 500 ⁇ s or less than 300 ⁇ s or less than 200 ⁇ s or less than 100 ⁇ s or less than 50 ⁇ s.
  • the lighting device and the camera device can be operated independently of one another.
  • the lighting device preferably has a plurality of lighting means, in particular LED lamps and/or halogen lamps.
  • the individual lighting devices or groups of lighting devices can preferably be controlled individually, in particular in a predetermined sequence.
  • a hyperspectral or multispectral camera device or an RGB camera device or gray value cameras with optical filters is preferably used as the camera device.
  • the respective camera device is particularly preferably designed in such a way that a large number of acquisitions can be made at the same time or in quick succession.
  • a food packaging return device or a food packaging printing device comprising at least one device described above for checking a colored security feature produced by means of a security ink on a beverage packaging.
  • the present invention according to claim 7 relates to a method for checking at least one colored security feature produced by means of a security color on a beverage packaging or a beverage packaging component.
  • the method according to the invention preferably comprises at least the steps: illuminating the beverage packaging or the beverage packaging component with light of different wavelengths, detecting the amount of reflected light with regard to at least five predetermined wavelengths, the wavelengths differing from one another at least with regard to the five recordings by a predefined wavelength range and in a color change interval of the safety color, matching the amount of light detected for each predetermined wavelength and a mathematical processing generated therefrom with a reference criterion, outputting a signal or value depending on the matching, the signal or the value being representative of a deviation from the reference criterion or match determined during matching with the reference criterion.
  • the mathematical processing corresponds to the first derivation of a function generated from the recorded values, with a result value that describes the highest slope of the curve defined by the values being determined for the comparison.
  • a packaging supplement within the meaning of the present invention can be, for example, a label or an outer packaging or a closure part.
  • At least the majority of the wavelengths recorded with regard to the quantity of light reflected in each case lie in the color change interval, with at least or at most 80% of the light emitted in the corresponding wavelength being reflected in the color change interval in a first end of the range and in a second end of the range, less or more than 20% of the light emitted in the corresponding wavelength is reflected.
  • This embodiment is advantageous because the area of the color change interval to be examined can be further limited, whereby, for example, a slope peak can be determined and used for comparison with a reference criterion.
  • the first end of the range is the present invention at least or up to 20 nm and preferably at least 30 nm and particularly preferably at least 40 nm from the second end of the range, wherein the second end of the range is preferably in the near infrared range.
  • the security feature has at least one additional color, with illumination of the packaging or the packaging component with light of different wavelengths also being used for the additional color, detection of the amount of reflected light with regard to at least five predetermined wavelengths, the wavelength being at least are different from one another with regard to the five recordings and are in a color change interval of the second color, the amount of light recorded for each predetermined wavelength is compared or a mathematical processing generated therefrom with a reference criterion and a signal or value is output as a function of the comparison. It is preferably checked whether a comparison with regard to a color or all comparisons or none of the comparisons has/have led to a match with the reference criterion.
  • the additional or second color is preferably also a security color.
  • At least the majority of the wavelengths recorded with regard to the amount of reflected light are preferably in a wavelength range, in particular a color change interval, which is characterized in that in a first end of the range at least 80% of the wavelength in the corresponding wavelength emitted light is reflected and in a second end of the range less than 20% of the light emitted in the corresponding wavelength is reflected.
  • the present invention relates to a computer program product for executing a method according to one of claims 7 to 11 and to a use of at least one hyperspectral or multispectral camera unit for detecting the amount of reflected light with regard to the at least five predetermined wavelengths in a method according to any one of claims 7 to 11.
  • the reference criterion can additionally or alternatively define a value or data range that maps predetermined deviations from ideal reflection data of the color of the security feature.
  • the use of the words “substantially” preferably defines a deviation in the range of 1%-30%, in particular 1%-20%, in particular 1%-10 in all cases in which these words are used within the scope of the present invention %, in particular from 1%-5%, in particular from 1%-2%, from the determination that would have been given without the use of these words.
  • figure 1 shows a coordinate system with two curves 10, 12 drawn therein by way of example.
  • the first curve 10 stands for the reflection behavior of a security color and the second curve 12 preferably stands for the reflection behavior of a further color.
  • the horizontal axis stands for the increase in the wavelengths, ie the wavelengths of the light that is recorded at the respective axis location or the respective measuring point. It should be understood here that the curve is made up of a large number of measurement points, with the minimum number of measurement points being 5.
  • the left vertical axis indicates the degree of reflection. Ie R100 stands for 100% absorbed light and R0 stands for 0% absorbed light.
  • the right vertical axis stands for the transmission, which preferably changes in direct dependence on the absorption.
  • the reference number 14 designates a color change interval of the first curve 10.
  • a characteristic curve of the reflection coefficient over the wavelengths under consideration is to be understood as a color change, as in FIGS figures 1 and 2 of the invention shown.
  • the color change interval preferably extends between a first end of the range 16 and a second end of the range 18.
  • the safety color and the other color can have a very similar reflection profile, except for the color change interval.
  • the 2 shows a purely exemplary simplified coordinate system. Furthermore, according to this representation, several values (14.1-14.12) are recorded, by means of which the course of the curve 10 is determined.
  • the multiple values 14.1-14.12 are recorded for specific or predetermined wavelengths.
  • the individual wavelengths are to be understood as corresponding wavelength intervals, which in particular correspond to the emission behavior of a corresponding LED diode.
  • the mathematical processing of the recorded reflection values is preferably compared with a reference criterion.
  • the recorded values are preferably transferred to a mathematical function.
  • the mathematical function is used in order to determine, for example, the wavelength at which the steepest slope of curve 10 occurs.
  • the greatest slope of the curve can be stored as a reference criterion, for example. If the recorded values or the mathematical processing of the values match the reference criterion with sufficient accuracy, the safety criterion is assessed as valid.
  • FIG. 3 shows a schematic of a device 1 according to the invention.
  • This device 1 according to the invention has an illumination device 6, in particular for the defined emission of predetermined wavelengths.
  • a camera device 8 is provided, which can be constructed, for example, as a hyperspectral or multispectral camera or as an array of a large number of cameras, in particular greyscale cameras with color filters for the respective light wavelength.
  • the reflection values recorded by the camera device 8 are preferably transmitted via a signal and/or data connection 10, in particular a cable or board-based line, transmitted to an evaluation device 12.
  • packaging 4 is shown, which can be designed as a can or PET bottle, for example.
  • the packaging 4 has a colored security feature 2 which can preferably be aligned in a defined manner with respect to the lighting device 6 and/or the camera device 8 by means of an alignment device (not shown).
  • the light emitted by the lighting device 6 therefore first strikes the security feature 2 and reflected portions of the light are recorded by the camera device 8 .
  • the present invention thus relates to a device 1 for checking a colored security feature 2 produced by means of a security color on a beverage packaging.
  • the device comprises at least one lighting device 6 for broadband illumination of at least a portion of the packaging 4 or the packaging component, a camera device 8 for detecting five

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Claims (13)

  1. Dispositif (1) de contrôle d'une caractéristique de sécurité (2) colorée, produite au moyen d'une couleur de sécurité, sur un emballage de boisson,
    comprenant au moins :
    un dispositif d'éclairage (6) pour éclairer à large bande au moins une partie de l'emballage de boisson (4) ou du composant d'emballage de boisson,
    un dispositif de caméra (8) pour saisir au moins cinq prises de vue de la caractéristique de sécurité colorée (2) de l'emballage de boisson (4) ou de la partie d'emballage de boisson pendant un éclairage de l'emballage de boisson (4) ou de la partie d'emballage de boisson au moyen du dispositif d'éclairage (6), chacune des prises de vue représentant une quantité de lumière réfléchie d'une longueur d'onde prédéterminée, les longueurs d'onde étant différentes les unes des autres, au moins en ce qui concerne les prises de vue, respectivement d'une plage de longueurs d'onde prédéfinie et se situant dans un intervalle de changement de couleur (14) de la couleur de sécurité,
    et un dispositif d'évaluation (12) pour déterminer la quantité de lumière réfléchie par prise de vue détectée et pour comparer un traitement mathématique des valeurs détectées avec un critère de référence et pour émettre une valeur de résultat ou un signal de résultat en fonction de la comparaison,
    le traitement mathématique correspondant à la dérivée première d'une fonction générée à partir des valeurs saisies,
    une valeur de résultat décrivant la pente la plus élevée de la courbe définie par les valeurs étant déterminée pour l'ajustement.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    le critère de référence définit une plage de valeurs ou de données qui reproduit des écarts prédéterminés par rapport à des données de réflexion idéales.
  3. Dispositif selon les revendications 1 à 2,
    caractérisé en ce que
    le traitement mathématique correspond à la dérivée seconde d'une fonction générée à partir des valeurs saisies.
  4. Dispositif selon les revendications 1 à 3,
    caractérisé en ce que
    le dispositif de caméra (8) est conçu de telle sorte que les prises de vue peuvent être enregistrées simultanément ou que le dispositif de caméra (8) est conçu de telle sorte que les prises de vue sont générées avec un décalage temporel de moins de 200 µs.
  5. Dispositif selon l'une des revendications précédentes,
    caractérisé en ce que
    le dispositif d'éclairage (6) et le dispositif de caméra (8) peuvent être actionnés en fonction l'un de l'autre.
  6. Dispositif de reprise d'emballages alimentaires ou dispositif d'impression d'emballages alimentaires, comprenant au moins un dispositif selon l'une quelconque des revendications précédentes.
  7. Méthode de vérification d'au moins une caractéristique de sécurité colorée générée au moyen d'une couleur de sécurité sur un emballage de boisson (4) ou un composant d'emballage de boisson,
    comprenant au moins les étapes suivantes :
    Eclairage de l'emballage de boisson (4) ou du composant d'emballage de boisson avec de la lumière de différentes longueurs d'onde,
    Détection de la quantité de lumière réfléchie par rapport à au moins cinq longueurs d'onde prédéterminées, les longueurs d'onde étant différentes les unes des autres d'une plage de longueurs d'onde prédéfinie, au moins en ce qui concerne les cinq enregistrements, et se situant dans un intervalle de changement de couleur (14) de la couleur de sécurité,
    la comparaison de la quantité de lumière détectée par longueur d'onde prédéterminée et d'un traitement mathématique généré à partir de celle-ci avec un critère de référence,
    le traitement mathématique correspondant à la dérivée première d'une fonction générée à partir des valeurs saisies,
    une valeur de résultat décrivant la pente la plus élevée de la courbe définie par les valeurs étant déterminée pour l'ajustement,
    délivrer un signal ou une valeur en fonction de l'ajustement, le signal ou la valeur étant représentatif d'un écart par rapport au critère de référence ou d'une concordance avec le critère de référence déterminé lors de l'ajustement.
  8. Méthode selon la revendication 7,
    caractérisé en ce que
    au moins la majorité des longueurs d'onde détectées en termes de quantité de lumière réfléchie sont situées dans l'intervalle de changement de couleur (14), dans lequel, dans l'intervalle de changement de couleur, au moins 80% de la lumière émise dans la longueur d'onde correspondante est réfléchie dans une première extrémité de plage (16) et moins de 20% de la lumière émise dans la longueur d'onde correspondante est réfléchie dans une deuxième extrémité de plage (18).
  9. Méthode selon la revendication 8,
    caractérisé en ce que
    la première extrémité de zone (16) est espacée de la deuxième extrémité de zone d'au moins 20 nm et de préférence d'au moins 30 nm et de manière particulièrement préférée d'au moins 40 nm, la deuxième extrémité de zone (18) se situant dans le domaine du proche infrarouge (NIR).
  10. Méthode selon la revendication 8 ou 9,
    caractérisé en ce que
    la caractéristique de sécurité (2) présente au moins une autre couleur par emballage de boisson (4) ou composant d'emballage de boisson,
    dans lequel, pour l'autre couleur, on procède également à un éclairage de l'emballage de boisson (4) ou de l'élément d'emballage de boisson avec une lumière de différentes longueurs d'onde, à une détection de la quantité de lumière réfléchie par rapport à au moins cinq longueurs d'onde prédéterminées, les longueurs d'onde étant différentes les unes des autres au moins en ce qui concerne les cinq enregistrements et se situant dans un intervalle de changement de couleur (14) de la deuxième couleur, à une comparaison de la quantité de lumière détectée par longueur d'onde prédéterminée ou d'un traitement mathématique généré à partir de celle-ci avec un critère de référence et à une émission d'un signal ou d'une valeur en fonction de la comparaison,
    On vérifie si une comparaison par rapport à une couleur ou toutes les comparaisons ou aucune des comparaisons a conduit à une concordance avec le critère de référence.
  11. Méthode selon la revendication 10,
    caractérisé en ce que
    en ce qui concerne la deuxième couleur, au moins la majorité des longueurs d'onde détectées en ce qui concerne la quantité de lumière réfléchie se trouvent dans une plage de longueurs d'onde caractérisée en ce que, dans une première extrémité de la plage, au moins 80% de la lumière émise dans la longueur d'onde correspondante est réfléchie et, dans une deuxième extrémité de la plage, moins de 20% de la lumière émise dans la longueur d'onde correspondante est réfléchie.
  12. Produit programme d'ordinateur comprenant des instructions qui, lorsqu'elles sont exécutées, amènent un dispositif selon l'une quelconque des revendications 1 à 6 à mettre en œuvre la méthode selon l'une quelconque des revendications 7 à 11.
  13. Méthode selon l'une quelconque des revendications 7 à 11, dans laquelle on utilise une unité de caméra multispectrale ou une unité de caméra hyperspectrale pour détecter la quantité de lumière réfléchie par rapport aux au moins cinq longueurs d'onde prédéterminées.
EP17718885.1A 2016-04-18 2017-04-18 Dispositif et procédé de surveillance de caractéristiques de sécurité en couleur Active EP3446294B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016004662.7A DE102016004662A1 (de) 2016-04-18 2016-04-18 Vorrichtung und Verfahren zum hochauflösenden Überwachen von farblichen Sicherheitsmerkmalen
PCT/EP2017/059205 WO2017182479A1 (fr) 2016-04-18 2017-04-18 Dispositif et procédé de surveillance de caractéristiques de sécurité en couleur

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EP3446294A1 EP3446294A1 (fr) 2019-02-27
EP3446294B1 true EP3446294B1 (fr) 2022-06-22

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DE102022112225A1 (de) 2022-05-16 2023-11-16 insensiv GmbH Leergutrücknahmeautomat sowie Beleuchtungsmodul und Betriebsverfahren hierfür

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE202006017363U1 (de) * 2006-11-13 2007-04-19 3R Machines B.V. Vorrichtung zum Erkennen und Analysieren eines aus Farben im Spektral- und Infrarot-Wellenbereich bestehenden Sicherheitszeichens
US20140293270A1 (en) 2009-10-15 2014-10-02 Authentix, Inc. Object Authentication
WO2015044123A1 (fr) 2013-09-25 2015-04-02 Sicpa Holding Sa Authentification d'une marque à partir de spectres de lumière

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006050367A2 (fr) * 2004-11-01 2006-05-11 Visualant, Incorporated Procedes et systemes d'authentification d'objets par spectre total des couleurs
GB0505319D0 (en) * 2005-03-15 2005-04-20 Kiz Llp Authentication method employing colour signature

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006017363U1 (de) * 2006-11-13 2007-04-19 3R Machines B.V. Vorrichtung zum Erkennen und Analysieren eines aus Farben im Spektral- und Infrarot-Wellenbereich bestehenden Sicherheitszeichens
US20140293270A1 (en) 2009-10-15 2014-10-02 Authentix, Inc. Object Authentication
WO2015044123A1 (fr) 2013-09-25 2015-04-02 Sicpa Holding Sa Authentification d'une marque à partir de spectres de lumière

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EP3446294A1 (fr) 2019-02-27
DE102016004662A1 (de) 2017-10-19
WO2017182479A1 (fr) 2017-10-26

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