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Performances optimales pour les données multimodales partiellement couplées

Abstract : Two models are called " coupled " when a non empty set of the underlying parameters of interest are related through a differentiable implicit function. In this context, several estimation strategies can be derived: either a joint estimation where the parameters of interest are retrieved by merging all datasets, or an individual estimation where the parameters of interest are respectively estimated from each dataset. In this paper, we show by analyzing lower bounds that the optimal process of joint estimation is always more accurate than the individual estimation process in the sense of mean square error for a general class of dataset distributions. This property is still true for the parameters that are not directly linked. Finally, we illustrate our results with the fusion of multiple tensor data.
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https://hal.archives-ouvertes.fr/hal-01567124
Contributor : Pierre Comon <>
Submitted on : Friday, July 21, 2017 - 5:33:36 PM
Last modification on : Tuesday, May 11, 2021 - 11:37:34 AM

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  • HAL Id : hal-01567124, version 1

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Chengfang Ren, Rodrigo Cabral Farias, Pierre-Olivier Amblard, Pierre Comon. Performances optimales pour les données multimodales partiellement couplées. GRETSI 2017 - XXVIème Colloque francophone de traitement du signal et des images, Sep 2017, Juan-Les-Pins, France. ⟨hal-01567124⟩

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