Commissariat a L'energie Atomique

Advestigo

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Hologram Industries

Hassane Essafi

Marc Pic

Corinne Thomas

Michel-Pierre Gayrard

Thierry Collette

Laurent Letellier

Clarisse Mandridake

Jean-Pierre Guerin

Jean-Francedillaois Larue

Jean Rebillat

Dominique D'Humieres

Aïssa Saoudi

Ali Behloul

Patrick Hede

Jean Michel Marie-Julie

Salima Sayah

Pascal Adam

Jean-Michel Marie-Julie

Larbi Guezouli

Louafi Essafi

Larbi Résidence Les Fonds Fanettes Guezouli

Salima c/o Advestigo Sayah

Ali c/o Advestigo Behloul

A method of indexing a video document represents the video document in the form of a parallelepipedal volume obtained by juxtaposing, on a time axis, successive frames of the video document where each frame is represented by a matrix of pixels in a two-dimensional space. A space-time video slice of the video document is constructed by extracting a set of pixels for each frame of the video document in a same line defined relative to a first direction of the frames and juxtaposing the lines of pixels corresponding to the frames on a time axis to form a space-time video slice of a length defined by the juxtaposed lines of pixels and of a height equal to the length of the lines extracted from each of the frames. The length is a function of the dimension of the frames in a second direction and the orientation of the lines. The colorimetric values of the pixels of the lines of the space-time video slice are initialized on the basis of the content of the lines extracted from the frames of the video document.

Method and a system for indexing and searching for video documents

The method of indexing multimedia documents comprises the following steps: a) for each document identifying and extracting terms tconstituted by vectors characterizing properties of the; b) storing terms tin a term base comprising P terms; c) determining a maximum number N of desired concepts that group together the most pertinent terms t; d) calculating the matrix T of distances between the terms tof the term base; e) decomposing the set P of terms tof the term base into N portions P(1&#x2266;j&#x2266;N) such that P=P&#x222a; P. . . &#x222a; P. . . &#x222a; P, each portion Pcomprising a set of terms tand being represented by a concept c, the terms tbeing distributed in such a manner that the terms that are farther apart are to be found in distinct portions P, P, and the terms that are closer together are to be found in the same portion P; f) structuring the concept dictionary; and g) constructing a fingerprint base made up of the set of concepts crepresenting the terms tof the documents, each document being associated with a fingerprint that is specific thereto.

Method for indexing and identifying multimedia documents

An initial image is subjected to a plurality of segmentations into uniform components by using various criteria to identify and isolate several series of objects constituted by segmented thumbnail images associated with geometrical descriptors for boxes that cover said objects, the results of the segmentation methods are fused, numerical values are used to characterize each object thumbnail image that results from fusion, and each of the thumbnail images is compared with indexed thumbnail images in an indexed database containing a set of textual descriptions for everyday elementary objects. The list of textual descriptions of everyday elementary objects matching the object thumbnail images that result from the segmentation and fusion operations is provided together with pertinence levels.

Process for the automatic creation of a database of images accessible by semantic features

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.

Process for indexing, storage and comparison of multimedia documents

In the method, correlated achromatic single-plane images are subjected to a plurality of operations for segmenting them into uniform components on the basis of different criteria. The results of the various segmentation operations for each of the processed correlated images are analyzed in order to generate cores constituted by zones presenting high certainty as to the existence of objects. The resulting cores are compared and those zones which correspond to more than some determined threshold of the various cores are conserved as indicating the presence of an object. The previously processed images are subjected to a weighted summing operation in order to obtain a first result image containing the uniform component cores. The first result image is then subjected to coloring followed by binarization in order to obtain a second result image containing the uniform components, and the individualized objects are extracted from the image.

Process for processing images to automatically extract semantic features

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.

Process and apparatus for management of multimedia databases

Efforts are made to construct a digital index that represents properties or the appearance of portions of an image so as to automatically rediscover in it a sample of the image during a subsequent search, after having set up a sample index in the same way and having compared the indices while searching for similarities. In this invention, the mesh dividing up the image or the sample into portions is founded on points of interest and is not uniform, and the index is made up of information coming, for each portion, from this same portion or from a specified assembly of neighboring portions. Furthermore, a redundant mesh is proposed (FIG. A) in order to describe the image several times and to attenuate the consequences of any omissions from the points of interest (E) on the other modeling (FIG. B).

Image search method, based on an invariant indexation of the images

The present invention relates to the automatic search for an image sample (f&prime;) in images (f) of a data base. The sample and the images are compressed using their fractal properties, in the form of relations linking their ranges (R) to area or domains (D) of the same image. According to the invention, the comparison relates to indexes registering the geometrical characteristics of these relations. Various means are proposed for permitting a profitable search and in particular a limitation of the distance between ranges and domains of the image (f).

Process for the search of samples in images of a data base

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.

Array system architecture of multiple parallel structure processors

The invention relates to a process for controlling the circulation of messages in a ring network, in which the data are consecutively supplied, which ensures a consistency of the circulating messages. It also relates to an interconnection system for performing this process. This system comprises a plurality of processors (P0, . . . , Pn) connected on a ring network by means of in each case a cell (C0, . . . , Cn) ensuring the transmission and reception of messages circulating in the ring, a reception module (R0, . . . , Rn) able to store the messages intended for the processor and a transmission module (E0, . . . En) able to store the messages to be supplied to the network.

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Orsay, France

Hassane Essafi