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Theses

Compression d'images dans les réseaux de capteurs sans fil

Abstract : The increasing development of Wireless Camera Sensor Networks today allows a wide variety of applications with different objectives and constraints. However, the common problem of all the applications of sensor networks remains the vulnerability of sensors nodes because of their limitation in hardware resources, the most restricting being energy. Indeed, the available wireless technologies in this type of networks are usually a low-power, short-range wireless technology and low power hardware resources (CPU, battery). So we should meet a twofold objective : an efficient solution while delivering outstanding image quality on reception. This thesis concentrates mainly on the study and evaluation of compression methods dedicated to transmission over wireless camera sensor networks. We have suggested a new image compression method which decreases the energy consumption of sensors and thus maintains a long network lifetime. We evaluate its hardware implementation using experiments on real camera sensor platforms in order to show the validity of our propositions, by measuring aspects such as the quantity of memory required for the implementation program of our algorithms, the energy consumption and the execution time. We then focus on the study of the hardware features of our proposed method of synthesis of the compression circuit when implemented on a ASIC chip prototype.
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Submitted on : Thursday, February 28, 2013 - 11:57:41 AM
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  • HAL Id : tel-01750619, version 2

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Leila Makkaoui. Compression d'images dans les réseaux de capteurs sans fil. Réseaux et télécommunications [cs.NI]. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0416⟩. ⟨tel-01750619v2⟩

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