Archivage Sécurisé d'Images

Abstract : Modern still image codecs furnish more than just good distortion-rate performances. They must also provide some services. Scalability in resolution and quality, er- ror resilience and embedded bitstreams were among the first one to be available. There is still room for enhance- ment, especially when it comes to security-oriented fea- tures. Data embedding is necessary, as for inserting metadata, or to copyright a picture. We present the use of a very simple reversible data embedding method in a multiresolution still image codec framework. Experimental results show the usefulness of such an adequation of techniques from different domain. Moreover, the embedding overhead is evaluated and shows to be very acceptable. Image encryption is one of the aspect of image secu- rity. This PhD work presents the embedding of an encryption service in a multiresolution lossless codec. Partial encryption is performed using ciphering only the keystone part of the codec algorithm, a quadtree decomposition. This results in a hierarchical encryption scheme, showing to be a good tradeoff between encryption speed, selective access and robustness.
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Theses
Traitement du signal et de l'image. INSA de Rennes, 2008. Français


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  • HAL Id : tel-00642974, version 1

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Jean Motsch. Archivage Sécurisé d'Images. Traitement du signal et de l'image. INSA de Rennes, 2008. Français. <tel-00642974>

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