In this paper, we present the tools specified by the MDS part of the MPEG-7 standard for describing multimedia data such as images and video. In particular, we focus on the description tools that represent the structure and semantics of multimedia data to whose development we have actively contributed. We also describe some of our research prototype systems dealing with the extraction and appli...

Excited states of two 7-aminocoumarin derivatives, coumarin 120 (7-amino-4-methylcoumarin) and coumarin 151 (7-amino-4-trifluoromethylcoumarin), were investigated using generalized multiconfigurational quasidegenerate perturbation theory (GMC-QDPT), multiconfigurational quasidegenerate perturbation theory (MC-QDPT) and time-dependent density functional theory (TDDFT) with the B3LYP and CAM-B3LY...

With increasing demand for content based manipulation of ever growing stores of audio data and the emergence MPEG-7 has come the call for structured audio representations. However, while the necessity of such a representation has been recognised and, to some extent, its essential features have been identified, its actual development and implementation have generally been relegated as problems f...

The recent proliferation of multimedia contents led to the need for more effective and efficient content representation techniques to speed up their retrieval. MPEG-7 is a new standard that aims at describing the low-level (syntactic) and high-level (semantic) multimedia content. In MPEG-7, the relationships between moving regions (i.e. objects) in videos are represented by the directional, spa...