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: 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: 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: 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: 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: The method for identifying and filtering multimedia data consists of monitoring off-line, on a data transmission network, multimedia data with reference to reference multimedia data and using an on-line intervention module to intercept, query or listen to the multimedia data recognized on-line using formal data stored in a formal activation database generated during off-line monitoring using suspicious data obtained during a search for multimedia data on the network.

Abstract: The system for intercepting multimedia documents disseminated from a network comprises an interception module (110) for intercepting and processing information packets, which module comprises a packet interception module (101), a packet header analyzer module (102), a module (104) for processing packets recognized as forming part of a connection that has already been set up in order to access a storage container where the data present in each received packet is saved, and a module (103) for creating an automaton for processing received packets belonging to a new connection. The system further comprises a module for analyzing the content of the data stored in the containers, for recognizing the protocol used, for analyzing the content transported by said protocol, and for reconstituting the intercepted documents.

Abstract: A method of comparing two multimedia documents includes a three-step registration process. Each document is analyzed to extract concrete or abstract single medium or multimedia elements (meta-segments) from the document. The meta-segments are categorized to identify categories of information in the document. Then, a meta-identifier is produced for the document from the information that identifies the contents of the meta-segments. After registration, traces of the multimedia documents can be compared, without requiring the entire contents of the multimedia documents to be compared.

Abstract: The management system comprises a set of specialized operational units with an acquisition module, a multimedia database, indexing and search agents that can be subdivided into subagents, an agent dedicated to managing information relating to the structure of documents, a module for analyzing and structuring document components, a user interface including a document indexing interface and a document search interface, a module for creating a multimedia database, and a module for opening a session. The management system also comprises a set of specialized functional units with an agent for arranging the various units of the system, agents for driving document indexing and searching, and an identifier manager. A platform provides interconnection and intercommunication between the specialized operational functional units.

Abstract: The management system comprises a set of specialized operational units with an acquisition module, a multimedia database, indexing and search agents that can be subdivided into subagents, an agent dedicated to managing information relating to the structure of documents, a module for analyzing and structuring document components, a user interface including a document indexing interface and a document search interface, a module for creating a multimedia database, and a module for opening a session. The management system also comprises a set of specialized functional units with an agent for arranging the various units of the system, agents for driving document indexing and searching, and an identifier manager. A platform provides interconnection and intercommunication between the specialized operational functional units.

Abstract: A method of identifying and verifying the content of multimedia documents accessible in a distributed system having multiple entry points, the method comprises: a) a step of registering multimedia documents as identified works, the registration step comprising, for each multimedia document under consideration, extracting a digital fingerprint comprising an ordered sequence of signatures in cascade resulting from multi-criterion analysis and breaking down into component parts of the multimedia document under consideration; and b) a step of verifying whether a given multimedia document accessible to the public constitutes authorized or unauthorized use of a registered work, the verification step comprising making successive comparisons using the signatures in cascade of the registered multimedia documents with the corresponding signatures of the given multimedia document, each following comparison being performed only if the previously compared signatures have revealed similarities, each comparison of signature

Abstract: The method of comparing two composite multimedia documents, each comprising at least two individual media (images, sounds, video signals, animated vector graphics, or texts), comprises the following steps: a) allocating a meta-identifier to each of the multimedia documents, the meta-identifier being in the form of a weighted hypergraph of nodes and relationships between said nodes and including meta-segments unambiguously identifying individual media making up the multimedia document concerned; b) performing recursion on the secondary tree structures of intra-medium relationships for the individual media of each of the documents; c) for the hypergraph of each individual medium of the document, performing an operation of maximizing matching with the hypergraph of an individual medium of the second document; d) for the hypergraph of each individual medium of the first document, determining the costs of edit operations leading to maximum matching with a hypergraph of an individual medium of the second document,

Abstract: A system of elementary processors in array form organized in accordance with a plurality of nodes with SIMD operation, each having a plurality of elementary processors connected to one another so as to form a ring of elementary processors, each elementary processor being associated with a connection cell connected to the cells of neighbouring elementary processors in order to form a ring network. Each SIMD node is provided with a memory and addressing module ensuring an addressing independence of the node, as well as a control unit connected to the control units of neighbouring nodes in order to form an internode control network in which priority tokens circulate, each memory and addressing module of a node being connected to the memory and addressing module of neighbouring nodes so as to form an internode data network. The system may find one application in the simulation of fluid flows.