A web system for ontology-based multimedia annotation, browsing and search

In this paper we present a complete system for semantic and syn tactic annotation, browsing and search of multimedia data, that is based on a service oriented architecture, with web-based interfaces developed following the Rich Internet Application paradigm. The system has been designed to be: i) flexible and extendable, allowing users to select only the services they need or to add their own tools to the multimedia processing pipelines; ii) distributed, with services that can be executed in a cloud computing infrastructure and accessed through web applications; Hi) user-friendly, with interfaces that have a uniform interface on every platform and that have an interaction level similar to that of desktop applications. Extensive user trials in real-world setup, performed by archive and broadcaster professionals, have shown the efficacy and usability of the proposed solution.