Transmission d'images sur les réseaux de capteurs sans fil sous la contrainte de l'énergie

Abstract : Among the many potential applications of wireless sensor networks, those using image sensors are valuable for everything concerning the detection, recognition and locating objects by sight. Sensors small, less energy and with a camera already exist in prototype stage, but processing algorithms and data compression and communication protocols of low complexity and low expensive energy should be developed for these applications can be envisaged in practice. The contribution of this thesis focuses on two aspects. First, we have proposed a protocol for transmitting images semi-reliable to reduce energy consumption nodes relaying packets until collector. Energy savings are achieved in preparing for the source of differences in priorities, with a wavelet transform of the image, then a condition for delivery of packages, jump by jump, according to their priority and status charging batteries. Secondly, we looked deeper aspects of processing and image coding to the source, and we have proposed a new compression algorithm of images of low complexity, combined with a technique of interlacing of pixels based on automorphism rings . Experiments on a platform of real network image sensors have been conducted to demonstrate the validity of our proposals, by measuring aspects such as the amount of memory required for the implementation of our software algorithms, their consumption energy and their execution time, and the quality of reconstructed images to a receiver in the presence of lost packages.
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Cristian Rodrigo Duran Faundez. Transmission d'images sur les réseaux de capteurs sans fil sous la contrainte de l'énergie. Autre. Université Henri Poincaré - Nancy 1, 2009. Français. ⟨NNT : 2009NAN10049⟩. ⟨tel-01748486⟩

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