Kosmas Petridis

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Annotations of multimedia documents typically have been pursued in two different directions. Either previous approaches have focused on low level descriptors, such as dominant color, or they have focused on the content dimension and corresponding annotations, such as person or vehicle. In this paper , we present a software environment to bridge between the(More)
In this paper, a knowledge representation infrastructure for semantic multimedia content analysis and reasoning is presented. This is one of the major objectives of the aceMedia Integrated Project where ontolo-gies are being extended and enriched to include low-level audiovisual features, descriptors and behavioural models in order to support automatic(More)
Annotations of multimedia documents typically have been pursued in two different directions. Either previous approaches have fo-cused on low level descriptors, such as dominant color, or they have focused on the content dimension and corresponding annotations, such as person or vehicle. In this paper, we present a software environment to bridge between the(More)
In this paper a novel electronic payment protocol suitable for " peer-to-peer " (P2P) networks is presented. It implements electronic cash-based transactions, between buyers and merchants. It is based on a bank account, though it can be easily extended and can be readily applied to other account payment models like debit cards. The proposed protocol is(More)
In this paper a novel payment system for Peer-to-Peer (P2P) commerce transactions is presented. It implements electronic cash-based transactions, between buyers and merchants. In this system, financial institutions become partners in the e-commerce transaction, conducted by their customers over the Internet. The innovation of the proposed system is the(More)
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