摘要:
In one embodiment, a security label comprises a random arrangement of printed LEDs. During fabrication of the label, the LEDs are energized, and the resulting dot pattern is converted into a unique digital first code and stored in a database. The label is then attached to an object to be later authenticated, or the LEDs are printed directly on the object, such as a passport, license, bank note, certificate, etc. For authenticating the object, the LEDs are energized and the dot pattern is converted into a code. The code is compared to the first code stored in the database. If there is a match, the object is authenticated. The label may also have a printed second code associated with the first code, and both codes must match codes stored in the database for authentication. The general shape of the printed pattern may convey the proper orientation of the pattern.
摘要:
Disclosed are methods and systems that include obtaining at least one image of a dendritic structure, analyzing the at least one image to identify one or more features associated with the dendritic structure, and determining a numerical value associated with the dendritic structure based on the one or more features.
摘要:
Described is a marking for a substrate. The marking comprises at least one luminescent substance (a) and at least one chiral liquid crystal polymer (CLCP) material (b) having a reflection wavelength range that overlaps at least a part of the luminescence wavelength range of (a), provided that at least a part of (b) is not located underneath (a).
摘要:
A system for authentication of paper sheet and other articles includes an optical sensor configured to generate an image of a first side of an article and a processor operatively connected to the optical sensor. The processor is configured to generate an image of the article with the optical sensor, the image including features that are illuminated by an external illumination source through the article, and generate an output indicating if the article is authentic in response to the features corresponding to a predetermined plurality of features that are generated from another image of the article corresponding to features in the generated image and in response to a cryptographic signature corresponding to feature data that are extracted from the other image corresponding to a valid cryptographic signature of a predetermined party.
摘要:
A scanner (200) is arranged to detect a unique spectral signature acquired from a sample (230) coded with a security marker (700) made up from one or more overt or covert coloured features (704a-704b) having known and uniquely identifiable spectral characteristics. More particularly, a narrowband light source (218), operating in the middle/near ultraviolet to short/near infra-red wavelength ranges, pulses light onto the security marker fixed to or formed in the sample (230). A lens system (222, 216) collects spectral data for analysis by a processing engine (201), such as a smartphone. The light source (218), which may be an array of differently coloured LEDs (224), selectively illuminates the security marker with discrete wavelengths as LEDs are selectively energized. The coloured features (704a-704d) are realized by combinations of dyes, pigments or inks that may fluoresce that are difficult to replicate and therefore typically pantone-based. The coloured features each have unique spectral responses, i.e. spectral characteristics, in the presence of incident EM radiation, so coding a bona fide product with a security marker made up from pre-selected coloured features producing the unique signature allows validation of the product. Specifically, by using the scanner and executing analysis code, the processing engine (201) is configured to make a quick comparison of the spectral peak and trough data acquired from the security marker against stored reference spectral signature corresponding to the marker on the product and to provide an indication (or not) of correspondence.
摘要:
Изобретение относится к способам определения подлинности документов, имеющих случайно распределенные идентификационные элементы, графическое изображение с идентификационной информацией, нанесенное на проверяемый объект. Получают от эмитента документ или изготовителя ценного предмета асимметричный ключ для декодирования информации, заключенной в графическом изображении, нанесенной на проверяемый объект. Перед сравнением сигналов дополнительно декодируют с помощью полученного ключа идентификационную информацию, нанесенную на проверяемый объект, так что в модуле сравнения сравнивают сигналы, соответствующие декодированной информации от дешифратора сканера и информации отдатчика. При этом обеспечивается возможность определения подлинности документов, имеющих случайно распределенные идентификационные элементы, когда данные об этих элементах не только выполнены в виде графического изображения с идентификационной информацией, адаптированной для считывания сканером, но и дополнительно закодированы.
摘要:
Hydrogel microparticles spatially and spectrally encoded using upconverting phosphor nanoparticles are described for use in biochemical testing. In each microparticle, upconversion nanocrystals having spectrally distinguishable emission spectra are disposed in different partions of an encoding region of the microparticle.
摘要:
L'invention concerne notamment un procédé de sécurisation d'un objet comprenant des étapes consistant à : - créer une signature graphique multicouche (23), par superposition en transparence partielle ou totale d'un premier élément graphique (20) aléatoire sur une première couche (11) à un deuxième élément graphique (21) sur une deuxième couche (12), et - stocker ladite signature graphique sur ou dans l'objet (10). Le procédé selon l'invention est essentiellement caractérisé en ce que : - la position relative du premier élément graphique (20) et du deuxième élément graphique (21) est aléatoire.
摘要:
Methods, apparatuses, systems, and tangible computer readable media for processing note payables for fraud by searching an image file of a note payable for information in multiple zones on the image file and comparing the obtained information to corresponding information in the issue file that is associated with the note payable. The note payable may be a check and searching of the image file may be done by optical character recognition. However, a user may wish to search an image file of a note payable in multiple zones for desired information.
摘要:
A system for obtaining a signature a scan area on the surface of an article comprises: a signature generator that generates the signature from scattered coherent radiation detected from a plurality of regions on the surface by using relative motion between the article and a scan head comprising a coherent radiation source and photodetectors to obtain a set of data points comprising a group of data points from each region; an imaging detector that captures a sequence of images of the surface during the relative motion; and a processor that calculates the instantaneous velocity of the relative motion; whereby the signature generator uses the instantaneous velocity to linearise the groups of data point within the set of data points before generating the signature of the article from the set of data points.