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Hierarchical visual description schemes for still images and video sequences Salembier Clairon, Philippe Jean O'Connor, N Correia Fernandez-Pereira, Paulo Pereira, F Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions Universitat Politècnica de Catalunya. GPI - Grup de Processament d'Imatge i Vídeo Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo Image processing -- Digital techniques Video sequences Decision support systems Books Sections Cameras MPEG 7 Standard Standardization Terminology Indexing Production Imatges -- Processament -- Tècniques digitals This paper proposes two description schemes (DSs) to describe the visual information of an audio-visual (AV) document. The first one, is devoted to still images. It describes the image visual appearance and its structure with regions as well as its semantic content in terms of objects. The second DS is devoted to video sequences. It describes the sequence structure as well as its semantic content in terms of events. Features such as motion, camera activity, etc. are included in this DS. Moreover, it involves static visual representations such as key-frames, background mosaics and key-regions. These elements are considered as still images and are described by the first DS. Peer Reviewed Postprint (published version) 1999 Conference report Salembier, P., O'Connor, N., Correia, P., Pereira, F. Hierarchical visual description schemes for still images and video sequences. A: IEEE International Conference on Image Processing. "1999 International Conference on Image Processing: ICIP99: 24-28 October, 1999: Kobe, Japan". Kobe: Institute of Electrical and Electronics Engineers (IEEE), 1999, p. 121-125. 0-7803-5470-2 https://hdl.handle.net/2117/98443 10.1109/ICIP.1999.822867 eng http://ieeexplore.ieee.org.recursos.biblioteca.upc.edu/document/822867/ Open Access 5 p. application/pdf Institute of Electrical and Electronics Engineers (IEEE)