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Source : I-revues

6 - Compression d'images adaptée aux angiographies coronaires pour le stockage sur carte à mémoire optique

BENOIT-CATTIN (H.) et al. (1998)

The main objective of the Cardio-Média project is to produce a coronarian multimedia data record stored on an optical car d in order to offer a better follow-up for the patients treated by angioplasty . In this paper, we present the compression algorithm implemented to store the angiographìc ...

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Source : I-revues

11 - Geometries, invariances, and SNR interpretations of matched and adaptive subspace detectors

SCHARF (L. L.) et al. (1998)

Matched subspace detectors generalize the matched filter by accommodating signals that are only constrained to lie in a multidimensional subspace. There are four of these detectors, depending upon knowledge of signal phase and noise power. The adaptive subspace detectors generalize the matched ...

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Source : I-revues

1 - Algorithmes séquentiels pour l'analyse de données par méthodes à noyau

RICHARD (C.) et al. (2004)

In recent years, many methods of analysis and classification of data based on reproducing kernel Hilbert spaces have been developed. Most of these methods incorporate the fundamental principle dictated by Vapnik et al. in Support Vector Machines, which consists in extending linear algorithms to the ...

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Source : I-revues

07 - Restauration d'image par fusion de films de sensibilités différentes

AZENCOTT (R.) et al. (1994)

This article is concerned with the fusion of stacked images, in order to restore the 2D image of an object. To perform this fusion, we have to estimate the transfer function between the sensitivity functions of the films on which these images have been taken. In our context, this estimation is ...

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Source : I-revues

3 - Reconnaissance supervisée de signaux aléatoires

LE CARPENTIER (E.) et al. (1989)

The purpose of this paper is the classifïcation and the recognition of stationary ergodic random signals, which can be represented by a fixed-order ARMA process. The method consists in estimating the model parameters, in order to summarize the statistical properties of the signal in a small set of ...

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Source : I-revues

7 - Architecture et applications d'un processeur de traitement numérique du signal de la seconde génération : le TMS 32020

ERSKINE, Cole et al. (1985)

Texas Instruments is manufacturing a digital signal processor since 1983: the TMS32010. Today a second "DSP" generation is coming with the TMS32020 which will be in production on the second half 1985. The objective of this article is to inform the reader on the very interesting characteristics ...

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Source : I-revues

7 - Analyse des vibrations d'un engrenage : cepstre, corrélation, spectre

CAPDESSUS (C.) et al. (1991)

This paper presents the application of cepstral analysis to the vibrations of a toothed gearing . The signal is modeled as an amplitude modulated oscillation and the effect of cepstrum is detailed . Cepstrum and autocorrelation are compared and the resolution of cepstrum is discussed . Cet article ...

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Source : I-revues

Mesure de retard. De l’acoustique sous-marine à la tomographie acoustique océanique

LACOUME, Jean-Louis (2007)

Time delay estimation is a central topic in signal processing. Geneviève Jourdain has made important contributions in that field. Her work has been supported by applications in submarine acoustics and ocean acoustics tomography. She has applied her deep expertise in multipaths propagation to mobile ...

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Source : I-revues

3 - Trigonométrie sphérique, identité de Yule entre PARCORs et algorithmes MCRR

DESBOUVRIES (F.) (1996)

Yule's PARCOR Identity, in statistics, and the fundamental law of cosines, in spherical trigonometry, are indeed the same formula . This observation establishes a link between Fast Recursive Least Squares FRLS adaptive filtering and spherical trigonometry, sinc e the fully—normalized FRLS lattice ...

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Source : I-revues

4 - Echantillonnage et ondelettes : la méthode du zero-padding revisitée

BROUAYE (F.) (1992)

Using wavelets techniques, one can construct orthogonal expansions for a signal which is sampled, when this signal is a square integrable fonction and is band-limited . The zero-padding method can be generalized and the signal can be interpolated with this new method through fast algorithms . ...

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