Thales

Cédric Le Barz

Marc Leny

Erwann Renan

François Capman

Didier Nicholson

Arnaud Galimberti

Céline Craye

Stéphane Zieba

Jean-François Goudou

A dynamically reconfigurable video surveillance system includes at least one video camera, a remote server, at least one viewing terminal, means making it possible to record the video sequences captured by the camera or cameras, said system being characterized in that: the video camera or cameras and the remote server include means for communicating with one another across a telecommunications network; the video camera or cameras include means for compressing the video sequences captured, the compression rate being adapted dynamically by taking account of the control messages originating from the remote server; the video camera or cameras include means for analyzing said video sequences in the compressed domain, to characterize the activity detected in their field of vision and to forward the result of this characterization to the remote server; the remote server include means for computing for each of the compressed video streams originating from the video camera or cameras a command making it possible to parametrize each of them by taking account of the signaling data received.

Dynamically reconfigurable intelligent video surveillance system

A method and interactive system for the on-line transmission of a high-resolution video sequence composed of a succession of T images includes a step of selecting relevant images comprising at least the following steps: split each image to be transmitted at the instant t into a number N of zones, for each zone n determined in the previous step, calculate a value representative of the content of said zone, for each image to be transmitted, generate a vector representative of the content of said image containing the values obtained in the previous step, calculate a normalized coefficient of correlation &#x3b1; between the reference vector determined for a previously selected image and that calculated for the current image, make a decision on the selection (or not) of the current image as a function of the value of the normalized correlation coefficient &#x3b1;.

Interactive system and method for transmitting key images selected from a video stream over a low bandwidth network

In a method of embedding a binary sequence in a video sequence or a compressed video stream, said stream being able to be decomposed into several types of objects, the method is applied to at least one image contained in said video sequence The method includes analyzing the video sequence in the compressed domain so as to determine one or more zones of interest, generating a watermarking map containing the image blocks available for the watermarking, excluding from the watermarking map, for the current compressed image, the blocks that are not eligible according to a defined criterion, and applying a digital watermarking function to each available block.

Method and device for embedding a binary sequence in a compressed video stream

A method is provided for visually encrypting at least one part of an at least partially compressed video stream or video sequence, it being possible for said stream to be decomposed into a first type of objects and a second type of objects, the method being applied on each of the images contained in a video sequence, including at least the following steps:

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Limours en Hurepoix, France

Cédric Le Barz