TAILIEUCHUNG - Báo cáo hóa học: " Research Article Image and Video Indexing Using Networks of Operators"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Image and Video Indexing Using Networks of Operators | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2007 Article ID 56928 13 pages doi 2007 56928 Research Article Image and Video Indexing Using Networks of Operators Stephane Ayache 1 Georges Quenot 1 and Jerome Gensel2 1 Multimedia Information Retrieval MRIM Group ofLIG Laboratoire d Informatique de Grenoble 385 rue de la Bibliothèque . 53 38041 Grenoble Cedex 9 France 2 Spatio-Temporal Information Adaptability Multimedia and Knowledge Representation STEAMER Group ofLIG Laboratoire d Informatique de Grenoble 385 rue de la Bibliotheque . 53 38041 Grenoble Cedex 9 France Received 28 November 2006 Revised 9 July 2007 Accepted 16 September 2007 Recommended by M. R. Naphade This article presents a framework for the design of concept detection systems for image and video indexing. This framework integrates in a homogeneous way all the data and processing types. The semantic gap is crossed in a number of steps each producing a small increase in the abstraction level of the handled data. All the data inside the semantic gap and on both sides included are seen as a homogeneous type called numcept and all the processing modules between the various numcepts are seen as a homogeneous type called operator. Concepts are extracted from the raw signal using networks of operators operating on numcepts. These networks can be represented as data-flow graphs and the introduced homogenizations allow fusing elements regardless of their nature. Low-level descriptors can be fused with intermediate of final concepts. This framework has been used to build a variety of indexing networks for images and videos and to evaluate many aspects of them. Using annotated corpora and protocols of the 2003 to 2006 TRECVID evaluation campaigns the benefit brought by the use of individual features the use of several modalities the use of various fusion strategies and the use of topologic and conceptual contexts was measured. The framework proved its .

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