Abstract: An optical security component may include a first layer, a diffractive structure etched on the first layer, a second reflective layer covering the diffractive structure. The diffractive structure includes a first pattern consisting of a set of facets arranged to form various subsets of facets, each subset of facets including a facet with symmetry of revolution arranged concentrically. In each group of the subsets of facets, the subsets of facets present, in point regions defined by identical polar coordinates, a local alteration of the surface, such as to produce a recognizable graphic object for a given tilt angle and azimuth angle. The polar coordinates vary from one group to another, so as to produce a dynamic visual effect observable in reflection by change of tilt and/or azimuth.

Abstract: An automatic desktop personalization device, for security booklet documents, includes a camera, an inkjet printing module, a laser marking module, a chip encoding module, and a transport mechanism. The inkjet printing module includes a printing head and is configured to print within a printing zone. The laser marking module is configured to mark within a marking zone. The transport mechanism is configured to automatically transport a security booklet document along a Y-axis linear direction, from an entrance to an exit, through printing positions and a marking position. The entrance and the exit are the same. The printing head is movable alongside an X-axis linear direction that is perpendicular to the Y-axis linear direction. The inkjet printing module includes the transport mechanism. The laser marking head is adjacent an inkjet printing bridge, such that the marking zone and the printing zone are at least partly combined.

Abstract: An optical security component may include a first layer, a diffractive structure etched on the first layer, a second reflective layer covering the diffractive structure. The diffractive structure includes a first pattern consisting of a set of facets arranged to form various subsets of facets, each subset of facets including a facet with symmetry of revolution arranged concentrically. In each group of the subsets of facets, the subsets of facets present, in point regions defined by identical polar coordinates, a local alteration of the surface, such as to produce a recognizable graphic object for a given tilt angle and azimuth angle. The polar coordinates vary from one group to another, so as to produce a dynamic visual effect observable in reflection by change of tilt and/or azimuth.

Abstract: A method for processing a candidate digital image includes defining a set of noteworthy points in the candidate digital image. A set of at least three noteworthy points is selected to comprise a notable departure point, a notable arrival point, and a third notable point not aligned with the notable departure point and the notable arrival point. A set of at least one route, between the notable departure point and the notable arrival point, is defined. The route passes through all of the selected notable points. Local characteristics, of the pixels located along the route, are extracted. The signal, corresponding to the variation in the magnitude of the local characteristics as a function of each pixel along each defined route, is recorded in the form of a fingerprint.

Abstract: An image processing method, for an identity document that comprises a data page, comprises acquiring a digital image of the page of data of the identity document. The method further comprises assigning a class or a super-class to the candidate identity document via automatic classification of the digital image by a machine-learning algorithm trained beforehand on a set of reference images in a training phase; processing the digital image to obtain a set of at least one intermediate image the weight of which is lower than or equal to the weight of the digital image; applying discrimination to the intermediate image using a discriminator neural network; and generating an output signal as output from the discriminator neural network, the value of which is representative of the probability that the candidate identity document is an authentic document or a fake.

Abstract: According to a first aspect, the invention relates to an optical security component intended to be observed in reflection, with the naked eye, according to face of observation. It comprises a first layer made of dielectric material, having a first refractive index (n1), at least one first diffractive structure (S1, S2) etched on said first layer. The first diffractive structure comprises a first pattern with at least one set of modules disposed side-by-side, in a given direction (X) of arrangement, a maximum width (l) of each module defined in the direction of arrangement (X) being less than 300 ?m. Each module comprises a bas-relief with a first set of facets whose forms are determined to simulate an optical element visible in reflection, with at least one convex or concave region, said optical element having a profile with a continuously variable slope in a single direction (Y), said direction of variation of the slope, at right angles to the direction of arrangement (X).

Abstract: The invention relates to a method for authenticating an illustration, comprising—encoding a message in the form of a two-dimensional barcode comprising blocks, each block coding a fragment of said message and comprising a set of coding sub-blocks, each sub-block comprising a set of binary elements. It is essentially characterised in that the encoding comprises prior steps consisting in:—defining or identifying a set of noteworthy points in the illustration,—calculating a set of attributes depending on certain at least of the noteworthy points,—selecting, among the calculated attributes, at least one attribute allowing a digital fingerprint to be defined—optionally compressing said digital fingerprint,—optionally signing said digital fingerprint by means of a cryptographic signature, and—recording in the message one among:—a set of at least one attribute,—the digital fingerprint,—the compressed digital fingerprint, and—the signed and optionally compressed digital fingerprint.

Abstract: The disclosure relates to a method for encoding an illustration, which involves writing the illustration in greyscale or in color, encoding a message in the form of a two-dimensional barcode comprising a set of blocks, each block encoding a fragment of the message and comprising a set of (M) rows and (N) columns, and each block comprising a set of encoding sub-blocks, each subblock comprising a set of bits. It is essentially characterized in that the encoding step comprises defining or identifying a set of remarkable points on the source illustration, calculating a set of attributes according to certain remarkable points, selecting, among the set of attributes, at least one attribute making it possible to define a digital fingerprint, optionally compressed, optionally sign the digital fingerprint, record in the message one of at least one attribute, the digital fingerprint, optionally compressed, the signed digital fingerprint in compressed or non-compressed form.

Abstract: According to a first aspect, the invention relates to an optical security component intended to be observed in reflection, with the naked eye, according to face of observation. It comprises a first layer made of dielectric material, having a first refractive index (n1), at least one first diffractive structure (S1, S2) etched on said first layer. The first diffractive structure comprises a first pattern with at least one set of modules disposed side-by-side, in a given direction (X) of arrangement, a maximum width (l) of each module defined in the direction of arrangement (X) being less than 300 ?m. Each module comprises a bas-relief with a first set of facets whose forms are determined to simulate an optical element visible in reflection, with at least one convex or concave region, said optical element having a profile with a continuously variable slope in a single direction (Y), said direction of variation of the slope, at right angles to the direction of arrangement (X).

Abstract: A secure product, and a production method, comprising a first reflective layer, a second layer and a third layer including readable information, the first layer being enclosed between the second and the third layers, in which the first and second layers are transparent, at least a first part of the internal surface of the second layer comprises a diffusing microstructure, and the diffusing microstructure is positioned so as to cover a predetermined part of the readable information.

Abstract: The invention relates to a plasmonic optical security component comprising two layers (2, 4) made of transparent dielectric material and a metal layer (3) arranged between said transparent dielectric material layers in order to form two dielectric-metal interfaces (31, 32).

Abstract: According to one aspect, the invention relates to an optical security component intended for being observed under direct reflection. The component comprises a structure engraved on a layer of a material having a refraction index n2, a thin layer of a dielectric material having a refraction index n1 other than n2, deposited on the structure, and a layer of a material having a refraction index no other than n1, encapsulating the coated structure of the thin layer.

Abstract: According to one aspect, the invention relates to a customizable document for producing a customized security document (10, 20).

Abstract: According to one aspect, the invention relates to an optical security component intended for being observed under direct reflection. The component comprises a structure engraved on a layer of a material having a refraction index n2, a thin layer of a dielectric material having a refraction index n1 other than n2, deposited on the structure, and a layer of a material having a refraction index no other than n1, encapsulating the coated structure of the thin layer.

Abstract: According to one aspect, the invention relates to an optical security component intended for being observed under direct reflection. The component comprises a structure engraved on a layer of a material having a refraction index n2, a thin layer of a dielectric material having a refraction index n1 other than n2, deposited on the structure, and a layer of a material having a refraction index n0 other than n1, encapsulating the coated structure of the thin layer.

Abstract: An ID document comprises a receiving substrate in or on which an ink that is fluorescent under UV-A lighting is locally deposited, and a multilayer optical security component attached to a substrate. The optical component comprises a structurable layer and a reflective dielectric layer discontinuously deposited on the structurable layer in the plane of the component so as to produce patterns. The reflective dielectric layer has a relative transmission of at most 40% in the UV-B or UV-C range. The optical component also include an assembly of at least one layer including pigments that are fluorescent when energized by UV-B or UV-C. These are deposited on the reflective dielectric layer in a uniform or discontinuous manner in the plane of the optical component.

Abstract: A method of securing a redundant initial two-dimensional barcode includes providing an initial message having a unique identifier, encoding the initial message as a set of predefined symbols so as to generate a redundant initial two-dimensional barcode having a redundant zone, generating a unique secret character string having a predefined fixed size, encoding the unique secret character string as a set of predefined symbols identical to the symbols used to generate the redundant initial two-dimensional barcode, and inserting the encoded unique secret character string into a redundant zone of the redundant initial two-dimensional barcode, each symbol of said encoded unique secret character string having a predefined position, so as to create a final two-dimensional barcode.

Abstract: According to one aspect, the invention relates to a customizable document for producing a customized security document (10, 20).

Abstract: According to one aspect, the invention relates to an optical security component intended for being observed under direct reflection. The component comprises a structure engraved on a layer of a material having a refraction index n2, a thin layer of a dielectric material having a refraction index n1 other than n2, deposited on the structure, and a layer of a material having a refraction index n0 other than n1, encapsulating the coated structure of the thin layer.

Abstract: The invention relates to a plasmonic optical security component comprising two layers (2, 4) made of transparent dielectric material and a metal layer (3) arranged between said transparent dielectric material layers in order to form two dielectric-metal interfaces (31, 32).