LU83333A1 - USE OF SURFACE TEXTURES AS A SINGLE IDENTITY MARK - Google Patents
USE OF SURFACE TEXTURES AS A SINGLE IDENTITY MARK Download PDFInfo
- Publication number
- LU83333A1 LU83333A1 LU83333A LU83333A LU83333A1 LU 83333 A1 LU83333 A1 LU 83333A1 LU 83333 A LU83333 A LU 83333A LU 83333 A LU83333 A LU 83333A LU 83333 A1 LU83333 A1 LU 83333A1
- Authority
- LU
- Luxembourg
- Prior art keywords
- profile
- identifying objects
- analyzed
- texture analysis
- surface texture
- Prior art date
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/64—Three-dimensional objects
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/80—Recognising image objects characterised by unique random patterns
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Description
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UTILISAΓΙCK DE TEXTURES DS SURFACE COMME MARQUE ALEATOIRE D'IDENTITE' UNIQUE.USE OF DS SURFACE TEXTURES AS A RANDOM BRAND OF UNIQUE IDENTITY.
i^Objet de la presente invention est la réalisation d’une méthode qui uti-| lise la texture ou l'état de surface d'un objet pour pouvoir le caractériser et l'identifier d'une manière unique.i ^ Object of the present invention is the realization of a method which uses | reads the texture or surface condition of an object to be able to characterize and identify it in a unique way.
On pourra ainsi reconnaître un objet ou une partie de l'objet par un ca- ! ·%.We can thus recognize an object or part of the object by a ca-! ·%.
ractère immuable qui lui est propre.an unchanging characteristic of its own.
Les possibilités d'identification des objets sont nombreuses; on connaît, j j par exemple, depuis longtemps le principe d'identification paî* sceau, mais le j -- sceau est un objet par lui meme que l'on cherche à reconnaître; il faut après i j garantir que le sceau appartient bien à l'objet qu'il protège. Il est donc ! il d'une fiabilité limitée et résistant mal à la fraude.The possibilities of identifying objects are numerous; for example, we have known the principle of identification for a long time, but the j-seal is an object in itself that we seek to recognize; after i must guarantee that the seal belongs to the object it protects. It is therefore ! it of limited reliability and poorly resistant to fraud.
! i : j Dans le domaine eu contrôle des installations, on structures nucléaires, j! des techniques de marquage aléatoire sont déjà utilisées. Cr. peut citer 1-! i: j In the field of facility control, we have nuclear structures, j! Random tagging techniques are already used. Cr. can quote 1-
! I! I
; |; |
Innrcu-age par dispersion de particules solides dans une matrice solide; le caractère immuable étant la répartition des particules ainsi que leur taille, figées une fois pour toutes au sein d'un volume solide; le moyen de mesure fait appel aux ondes ultrasonores et à leur réflexion dans le système hétérogène ^ lequel, avec le transducteur révélateur employé doit consituer un tout immuable.Innrcu-age by dispersion of solid particles in a solid matrix; the immutable nature being the distribution of the particles as well as their size, frozen once and for all within a solid volume; the means of measurement calls upon the ultrasonic waves and their reflection in the heterogeneous system ^ which, with the revealing transducer employed must constitute an immutable whole.
i 1 La reconnaissance demande une transmission par ultrasons de 1 'information, c'est à dire un exact repositionnement du transducteur, et une identicite absolue entre transducteurs utilisés successivement, par rapport au reseau tridimensionnel des particules dispersées, i-ans ce cas donc, le caractère utilise des ondes ultrasonores pour être mesuré; il n'est pas directement révélé. En plus, des Lechnologies très spéciales sont necessaires, j Γ ’ - 2 - i: Pour pallier aux susdits inconvénients en propose, selon l'invention, une nouvelle méthode û'identifieshion des objets.i 1 Recognition requires an ultrasonic transmission of information, that is to say an exact repositioning of the transducer, and an absolute identicity between transducers used successively, compared to the three-dimensional network of dispersed particles, i-in this case therefore, the character uses ultrasonic waves to be measured; it is not directly revealed. In addition, very special Lechnologies are necessary, j Γ ’- 2 - i: To alleviate the above drawbacks, according to the invention proposes a new method for identifying objects.
J Tout objet solide est limité pdr une surface. Si un objet solide est in- j rr.urble par nature, sa surface, considérée com.n.e enveloppe indissociable, l'est i ! aussi. Sans les conditions 'usuelles, le surirce â'ur. objet ctr.trirue dljà à j j son identification.J Any solid object is limited to a surface. If a solid object is injectable by nature, its surface, considered as an inseparable envelope, is i! as well. Without the usual conditions, the surirce â'ur. object ctr.trirue dljà à j j its identification.
Cn propose donc d'utiliser la texture ou état de surface des objets pour pouvoir les caractériser d'une manière unieue.We therefore propose to use the texture or surface condition of the objects to be able to characterize them in a uniform way.
ILa surface doit presenter dans la zone ou elle est utilisée, un caractère - aléatoire certain; c'est en général le cas eu niveau de la rugosité des surfa-| ces mécaniques. Si elle est utilisée telle que venue de construction, on la i dira naturelle. Si nécessaire, on le transformera localement par suriaçage ; jj _ f | ou rayurage ou grattage superficiel pour lui conférer une texture bien alea- ] toire c'est-à-dire un marquage adéquat.The surface must present in the area where it is used, a certain - random character; this is generally the case in terms of surface roughness | these mechanics. If it is used as it came from construction, it will be said to be natural. If necessary, it will be locally transformed by overwiring; dd _ f | or scratching or surface scraping to give it a well random texture, that is to say an adequate marking.
il ( f ILa texture, naturelle ou conférée, est le caractère immuable. Son relevé, par palpeur, stylo ou tout autre moyen, est le moyen d'identification.it (f ILThe texture, natural or imparted, is the immutable character. Its record, by feeler, pen or any other means, is the means of identification.
j|j |
Selon la caractéristique principale de l'invention, on prend une partie de la surface de l'objet à identifier, on analyse les informations contenues 'dans un profil de ladite surface et on enregistre ledit profil.According to the main characteristic of the invention, part of the surface of the object to be identified is taken, the information contained in a profile of said surface is analyzed and said profile is recorded.
Selon une autre caractéristique de l'invention, les signaux du. profil de la surface à analyser sont transposés et echantillonés dans le domaine f ' de fréquences.According to another characteristic of the invention, the signals of. profile of the surface to be analyzed are transposed and sampled in the frequency domain f '.
La Figure annexée montre comment 1ε section d'une surface mécanique pré-| sente un aspect topographique aléatoire. Le caractère d'unicité de la coupe provient de 1ε richesse â ' informât ions résidant!; à la surface d'un objet: i ! ’ f I * - 3 - '; pics, vallées, plateaux, hauteurs, directions, etc. quand elle est e.·:plcrée i ri '1 ,1 à l'echelle voulue.The attached figure shows how the section of a mechanical surface pre- | feels a random topographic aspect. The uniqueness of the cut comes from the richness of resident information! on the surface of an object: i! ’F I * - 3 - '; peaks, valleys, plateaus, heights, directions, etc. when it is e. ·: plcrée i ri '1, 1 at the desired scale.
ί A _i s En conséquence, si deux surfaces ont des dimensions et des aspects similai res à l’echelle de la fabrication ( tolérance, finis, profil ), on peut toujours trouver, à une echelie plus fine, un état de rugosité pouvant les différencier. Dans nôtre cas, c'est l'element aspérité èt l'element vallée et leur emplacement qui sont importants.ί A _i s Consequently, if two surfaces have dimensions and aspects similar to the manufacturing scale (tolerance, finishes, profile), one can always find, at a finer scale, a state of roughness which can differentiate. In our case, it is the asperity element and the valley element and their location that are important.
Se pose donc après, pour l'identification, le problème du repositionnement exact du palpeur en face de la section explorée anterieur·;ment.Then arises, for identification, the problem of the exact repositioning of the probe in front of the section explored previously;
Cn a vérifié quf7 une pièce posée sur un simple st.mtif muni d'un ergot, quand on la réplace une autre fois nur le même stntif redonne bien la même | information.It has been verified that a part placed on a simple st.mtif fitted with a lug, when it is replaced another time on the same stntif, gives the same | information.
ii
Le redfepositionnement peut être de deux types: l'identite 1 plaquette ou autre support ) est amenée à 1'-ppmr. il d·..· me-sure, il s.1 : mit ici de marque i' transportable; ou bien l'eppareil est "-η-' à 1· structur- rrrrués et il ! s'agit alors de marque fixe.The redfepositioning can be of two types: the identity 1 plate or other support) is brought to 1'-ppmr. it d · .. · sure, it s.1: put here brand i 'transportable; or else the apparatus is "-η- 'at 1 · structured-rrrruru and it is then a fixed mark.
ILe signal des- profils des surfaces peut être visualisé directement sur papier ou bien cn peut le digitaliser, c'est-à-dire on compte les asperiteés, on mesure les hauteurs, les distances et on obtient une cléf digitale duditThe surface profile signal can be viewed directly on paper or it can be digitized, that is to say we count the asperities, we measure the heights, the distances and we obtain a digital key of the said
VV
signal.signal.
Les sigaux de profil peuvent être aussi transposés et échantillonés dans le domaine des fréquences, de façon que des' spectres partiels puissent a volonté être utilisés comme clef d'identité d'une texture.Profile sigals can also be transposed and sampled in the frequency domain, so that partial spectra can be used as an identity key to a texture.
La méthode d'identification proposée par le present brevet permet de ga- % rantir des structures déjà, protégées par des sceaux conventionnels. Elle - h - i peut constituer en soi une technique de scellement. Fer exemple l'ensemble tige filetée et boulon peut être limé à ras et constituer une marque unique; si quelq'un devait dévisser le boulon, il ne pourrait jamais le revisser et le repositionner exactement par rapport à la vis. La mesure de profil, à cheval sur vis et boulon, détecterait cette fraude.The identification method proposed by this patent makes it possible to guarantee structures already, protected by conventional seals. It - h - i can in itself constitute a sealing technique. Iron example, the threaded rod and bolt assembly can be filed flush and constitute a single mark; if someone were to unscrew the bolt, they could never re-screw it and reposition it exactly in relation to the screw. Profile measurement, straddling screws and bolts, would detect this fraud.
Cette méthode se prête bien à l'identification des objets en utilisant leur propre texture topographique, sans devoir y pratiquer de trou de réfe-| rence. Comme par exemple: tableaux, statues ou meubles, la ou les autres 11 méthodes ou techniques d'identification ne seraient pas possibles sans en-do: mqger l'oeuvre d'art.This method lends itself well to the identification of objects using their own topographic texture, without having to practice a reference hole in them. rence. As for example: paintings, statues or furniture, the other 11 or methods or techniques of identification would not be possible without in-do: mqger the work of art.
|j Un autre avantage de nôtre meuhode résidé dans le fait que l'appareil j| de lecture peut être de petites dimensions et -en nécessite pas de gros ;! moyens pour l'identification cor.mef’est le cas pour les transducteurs piézo- i ! électriques.| j Another advantage of our method is that the j | reading can be small and -not require large; means for cor.mef identification is the case for piezo-i transducers! electric.
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Claims (3)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU83333A LU83333A1 (en) | 1981-05-04 | 1981-05-04 | USE OF SURFACE TEXTURES AS A SINGLE IDENTITY MARK |
IT48297/82A IT1147935B (en) | 1981-05-04 | 1982-04-28 | OBJECT IDENTIFICATION SYSTEM "THROUGH ANALYSIS OF THEIR SURFACE STRUCTURE |
GB8212700A GB2097979B (en) | 1981-05-04 | 1982-04-30 | Utilisation of surface textures as a random marking or unique identity |
DE3216867A DE3216867C2 (en) | 1981-05-04 | 1982-05-03 | Object identification procedures |
FR8207747A FR2505041B1 (en) | 1981-05-04 | 1982-05-04 | USE OF SURFACE TEXTURES AS A RANDOM MARK OF UNIQUE IDENTITY |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU83333A LU83333A1 (en) | 1981-05-04 | 1981-05-04 | USE OF SURFACE TEXTURES AS A SINGLE IDENTITY MARK |
LU83333 | 1981-05-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
LU83333A1 true LU83333A1 (en) | 1983-03-24 |
Family
ID=19729640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
LU83333A LU83333A1 (en) | 1981-05-04 | 1981-05-04 | USE OF SURFACE TEXTURES AS A SINGLE IDENTITY MARK |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE3216867C2 (en) |
FR (1) | FR2505041B1 (en) |
GB (1) | GB2097979B (en) |
IT (1) | IT1147935B (en) |
LU (1) | LU83333A1 (en) |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2567947B1 (en) * | 1984-07-23 | 1986-12-26 | Euratom | SURFACE TEXTURE READING ACCESS CONTROL SYSTEM |
DE3935207A1 (en) * | 1989-10-23 | 1991-05-02 | Dornier Gmbh | Identification marking partic. for armoured vehicles - has cpd. of iron oxide, aluminium and higher m.pt. particles fired, casting to armour, cooled and ultrasonically recorded for screening |
RU2267160C2 (en) * | 1999-07-19 | 2005-12-27 | Российский Федеральный Ядерный Центр-Всероссийский Научно-Исследовательский Институт Технической Физики Им. Акад. Е.И. Забабахина (Рфяц-Вниитф) | Object identification method |
DE10040188A1 (en) * | 2000-08-17 | 2002-02-28 | Infineon Technologies Ag | Seal for the authentication of sealed objects and methods for producing and testing the seal |
DE10155780A1 (en) * | 2001-11-14 | 2003-05-22 | Vision Tools Hard Und Software | Securing objects against counterfeiting and/or imitation involves inserting and/or attaching non-reproducible physical random pattern during manufacture for later detection and comparison |
US8171567B1 (en) | 2002-09-04 | 2012-05-01 | Tracer Detection Technology Corp. | Authentication method and system |
ATE433164T1 (en) | 2004-03-12 | 2009-06-15 | Ingenia Technology Ltd | METHOD AND DEVICES FOR GENERATING AUTHENTICABLE ITEMS AND THEIR SUBSEQUENT VERIFICATION |
JP4607947B2 (en) | 2004-03-12 | 2011-01-05 | インジェニア・ホールディングス・(ユー・ケイ)・リミテッド | Authenticity verification methods, products and equipment |
GB2417592B (en) | 2004-08-13 | 2006-07-26 | Ingenia Technology Ltd | Authenticity verification of articles |
EP1908027B1 (en) | 2005-07-27 | 2010-09-29 | Ingenia Holdings Limited | Verification of authenticity |
GB2448245B (en) | 2005-12-23 | 2009-11-04 | Ingenia Holdings | Optical authentication |
DE102006006733B3 (en) * | 2006-02-13 | 2007-08-23 | Iba Ag | Method and device for identifying a section of a semifinished product |
GB2440386A (en) * | 2006-06-12 | 2008-01-30 | Ingenia Technology Ltd | Scanner authentication |
DE102007030384B4 (en) | 2007-06-29 | 2009-02-05 | Dade Behring Marburg Gmbh | Method for identifying a transparent object based on its absorption spectrum |
GB2466465B (en) | 2008-12-19 | 2011-02-16 | Ingenia Holdings | Authentication |
GB2466311B (en) | 2008-12-19 | 2010-11-03 | Ingenia Holdings | Self-calibration of a matching algorithm for determining authenticity |
GB2476226B (en) | 2009-11-10 | 2012-03-28 | Ingenia Holdings Ltd | Optimisation |
DE102010015014A1 (en) | 2010-04-14 | 2011-10-20 | Bayer Technology Services Gmbh | Optical scanner |
DE102010021380A1 (en) | 2010-05-25 | 2011-12-01 | Bayer Technology Services Gmbh | Identification of objects |
US8526743B1 (en) | 2010-11-01 | 2013-09-03 | Raf Technology, Inc. | Defined data patterns for object handling |
US9443298B2 (en) | 2012-03-02 | 2016-09-13 | Authentect, Inc. | Digital fingerprinting object authentication and anti-counterfeiting system |
US8774455B2 (en) | 2011-03-02 | 2014-07-08 | Raf Technology, Inc. | Document fingerprinting |
US9152862B2 (en) | 2011-09-15 | 2015-10-06 | Raf Technology, Inc. | Object identification and inventory management |
DE102011110478B4 (en) | 2011-08-17 | 2018-07-26 | Gottfried Wilhelm Leibniz Universität Hannover | Method for recognizing a three-dimensional object, device and computer program therefor |
DE102013219591A1 (en) * | 2013-09-27 | 2015-04-16 | Albert-Ludwigs-Universität Freiburg | METHOD FOR AUTHENTICATING MICROELECTRONIC COMPONENTS |
DE102014108664B4 (en) * | 2014-06-20 | 2017-09-21 | Friedrich Wilhelm Bauer | Identification of components |
US10621594B2 (en) | 2016-02-19 | 2020-04-14 | Alitheon, Inc. | Multi-level authentication |
EP3236401A1 (en) | 2016-04-18 | 2017-10-25 | Alitheon, Inc. | Authentication-triggered processes |
US10614302B2 (en) | 2016-05-26 | 2020-04-07 | Alitheon, Inc. | Controlled authentication of physical objects |
US10740767B2 (en) | 2016-06-28 | 2020-08-11 | Alitheon, Inc. | Centralized databases storing digital fingerprints of objects for collaborative authentication |
US10915612B2 (en) | 2016-07-05 | 2021-02-09 | Alitheon, Inc. | Authenticated production |
US10902540B2 (en) | 2016-08-12 | 2021-01-26 | Alitheon, Inc. | Event-driven authentication of physical objects |
US10839528B2 (en) | 2016-08-19 | 2020-11-17 | Alitheon, Inc. | Authentication-based tracking |
US11062118B2 (en) | 2017-07-25 | 2021-07-13 | Alitheon, Inc. | Model-based digital fingerprinting |
EP3514715A1 (en) | 2018-01-22 | 2019-07-24 | Alitheon, Inc. | Secure digital fingerprint key object database |
US10963670B2 (en) | 2019-02-06 | 2021-03-30 | Alitheon, Inc. | Object change detection and measurement using digital fingerprints |
EP3734506A1 (en) | 2019-05-02 | 2020-11-04 | Alitheon, Inc. | Automated authentication region localization and capture |
EP3736717A1 (en) | 2019-05-10 | 2020-11-11 | Alitheon, Inc. | Loop chain digital fingerprint method and system |
US11238146B2 (en) | 2019-10-17 | 2022-02-01 | Alitheon, Inc. | Securing composite objects using digital fingerprints |
EP3859603A1 (en) | 2020-01-28 | 2021-08-04 | Alitheon, Inc. | Depth-based digital fingerprinting |
US11568683B2 (en) | 2020-03-23 | 2023-01-31 | Alitheon, Inc. | Facial biometrics system and method using digital fingerprints |
US11341348B2 (en) | 2020-03-23 | 2022-05-24 | Alitheon, Inc. | Hand biometrics system and method using digital fingerprints |
US11948377B2 (en) | 2020-04-06 | 2024-04-02 | Alitheon, Inc. | Local encoding of intrinsic authentication data |
US11663849B1 (en) | 2020-04-23 | 2023-05-30 | Alitheon, Inc. | Transform pyramiding for fingerprint matching system and method |
US11983957B2 (en) | 2020-05-28 | 2024-05-14 | Alitheon, Inc. | Irreversible digital fingerprints for preserving object security |
EP3926496A1 (en) | 2020-06-17 | 2021-12-22 | Alitheon, Inc. | Asset-backed digital security tokens |
FR3120269A1 (en) | 2021-03-01 | 2022-09-02 | TiHive | Individualized authentication of products using terahertz waves |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2755702A (en) * | 1951-10-11 | 1956-07-24 | Gen Electric | Smoothness monitoring device |
GB1099839A (en) * | 1965-11-04 | 1968-01-17 | British Petroleum Co | Improvements relating to the separation of hydrocarbon mixtures |
DE1808298B2 (en) * | 1968-11-12 | 1971-09-30 | METHOD AND DEVICE FOR DETECTING AND EVALUATING FINGERPRINTS | |
GB1357734A (en) * | 1970-05-13 | 1974-06-26 | Int Art Registry Uk Ltd | Authentication of works of art |
US4200394A (en) * | 1971-01-13 | 1980-04-29 | The United States Of America As Represented By The Secretary Of The Army | Hologram technique for establishing the integrity of packages |
CH529398A (en) * | 1971-03-23 | 1972-10-15 | Landis & Gyr Ag | Method for preventing successful counterfeiting of stamps |
US3857640A (en) * | 1973-07-19 | 1974-12-31 | E Hilbon | Identification means for an article and method and apparatus for recording same |
US4218674A (en) * | 1975-09-09 | 1980-08-19 | Dasy Inter S.A. | Method and a system for verifying authenticity safe against forgery |
US4359903A (en) * | 1979-04-24 | 1982-11-23 | European Atomic Energy Community (Euratom) | System for the identification of objects, for example nuclear fuel elements |
-
1981
- 1981-05-04 LU LU83333A patent/LU83333A1/en unknown
-
1982
- 1982-04-28 IT IT48297/82A patent/IT1147935B/en active
- 1982-04-30 GB GB8212700A patent/GB2097979B/en not_active Expired
- 1982-05-03 DE DE3216867A patent/DE3216867C2/en not_active Expired - Fee Related
- 1982-05-04 FR FR8207747A patent/FR2505041B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2097979B (en) | 1985-11-27 |
DE3216867A1 (en) | 1982-12-02 |
IT1147935B (en) | 1986-11-26 |
FR2505041A1 (en) | 1982-11-05 |
FR2505041B1 (en) | 1986-11-28 |
IT8248297A0 (en) | 1982-04-28 |
GB2097979A (en) | 1982-11-10 |
DE3216867C2 (en) | 1994-02-17 |
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