8,553 Hits in 7.7 sec


Takuho Nakano, Shigeki Sagayama, Nobutaka Ono, Akisato Kimura, Hirokazu Kameoka, Kunio Kashino
2010 TREC Video Retrieval Evaluation  
We applied a generative approach to the TRECVID 2010 Semantic Indexing (SIN) and Known-Item Search (KIS) tasks, using a probabilistic network called Hierarchical Topic Trajectory Model (HTTM).  ...  With this model, the semantic indexing and the knownitem search tasks were dealt within a single unified framework. We show how it worked, and present some analysis for the SIN task.  ...  With this background, we developed a new statistical model called a hierarchical topic trajectory model (HTTM) that can handle the semantic indexing task and the known- item search task within a single  ... 
dblp:conf/trecvid/NakanoSOKKK10 fatcat:d7j36d6wivdnlmwynpypwhdw2a

Semantic representation of multimedia content: Knowledge representation and semantic indexing

Phivos Mylonas, Thanos Athanasiadis, Manolis Wallace, Yannis Avrithis, Stefanos Kollias
2007 Multimedia tools and applications  
index and classify documents to topics, based on a unified knowledge and semantics representation model.  ...  All processes are based on a novel semantic processing methodology, employing fuzzy algebra and principles of taxonomic knowledge representation.  ...  Both the metadata and the content are mapped to a semantic index, which is constructed based on a unified, fuzzy knowledge model.  ... 
doi:10.1007/s11042-007-0161-4 fatcat:6b7dmsan7jee3j24lbvlrajasu

Knowledge-Based Multimedia Content Indexing and Retrieval [chapter]

Manolis Wallace, Yannis Avrithis, Giorgos Stamou, Stefanos Kollias
2005 Multimedia Content and the Semantic Web  
The overall objective of the system is to be a stand-alone, distributed information system that offers enhanced search and retrieval capabilities to users interacting with digital audiovisual archives  ...  and computational intelligence methods, have observed a close cooperation with each other during the past few years.  ...  content based on its mapping to semantic entities through the index.  ... 
doi:10.1002/0470012617.ch12 fatcat:j5dvi2hhqncg7luyqfui5zbdte

Semantic Classification and Indexing of Open Educational Resources with Word Embeddings and Ontologies

Dimitrios A. Koutsomitropoulos, Andreas D. Andriopoulos, Spiridon D. Likothanassis
2020 Cybernetics and Information Technologies  
To achieve this, we combine explicit knowledge graph representations with vector-based learning of formal thesaurus terms.  ...  AbstractThe problem of thematic indexing of Open Educational Resources (OERs) is often a time-consuming and costly manual task, relying on expert knowledge.  ...  This work starts with the conversion of documents into vectors by search engine indexing (Elastic Search) and the identification of the most similar documents based on cosine similarity.  ... 
doi:10.2478/cait-2020-0043 fatcat:ngxfrumionardle2rvrk7gtc4m

Semantic Matching in Search

Hang Li, Jun Xu
2014 Foundations and Trends in Information Retrieval  
Relevance is the most important factor to assure users' satisfaction in search and the success of a search engine heavily depends on its performance on relevance.  ...  ., query "ny times" does not match well with a document only containing "New York Times"), because term matching, i.e., the bag-of-words approach, still functions as the main mechanism of modern search  ...  of semantic matching in search and in general learning to match.  ... 
doi:10.1561/1500000035 fatcat:ici6lm2fgjfwznnydro5u2s3va

Towards a Statistically Semantic Web [chapter]

Gerhard Weikum, Jens Graupmann, Ralf Schenkel, Martin Theobald
2004 Lecture Notes in Computer Science  
This paper presents steps towards such a "statistically semantic" Web and outlines technical challenges.  ...  Ideally, this should enable a wealth of query processing and semantic reasoning capabilities using XQuery and logical inference engines.  ...  and unifying their query and result representations on the fly.  ... 
doi:10.1007/978-3-540-30464-7_2 fatcat:sva3zylsrbdv7ge7wr5jy6ux6u

Spacetimes with Semantics [article]

Mark Burgess
2014 arXiv   pre-print
Semantics make up the essential difference in how one describes and uses the concept of space in physics, chemistry, biology and technology.  ...  In these notes, I have tried to assemble what seems to be a set of natural, and pragmatic, considerations about discrete, finite spacetimes, to unify descriptions of these areas.  ...  Acknowledgement I am grateful to Paul Borrill for interesting discussions on the nature of time.  ... 
arXiv:1411.5563v1 fatcat:lo6gml2axbbhtluxjwiiearzny

The Semantic Revolution

Jason Bengtson
2015 Journal of Electronic Resources in Medical Libraries  
It is vital that information professionals be conversant in the foundational concepts upon which these technologies are based.  ...  Jason oversees the computing resources at the library and explores new technologies to determine how the library might engage with them.  ...  "Jason Bengtson" to related topics, institutions, locations, and individuals within their indexes.  ... 
doi:10.1080/15424065.2015.1001964 fatcat:m6b4it3fsnaapkcvcocadvzhou

A semantic-based and adaptive architecture for automatic multimedia retrieval composition

Daniela Giordano, Isaak Kavasidis, Carmelo Pino, Concetto Spampinato
2011 2011 9th International Workshop on Content-Based Multimedia Indexing (CBMI)  
Another issue with MMR systems regards the relevance of the results that, as is known, depends strongly on the specific task.  ...  In this thesis, a semantic-based system that uses ontologies for describing not only the application domain but also the algorithm's steps to be performed for respecting user's and domain requirements  ...  Naphide and Huang used a probabilistic framework to map low level features into semantic representations [53] . The semantic representations were then used for indexing, searching and retrieval.  ... 
doi:10.1109/cbmi.2011.5972542 dblp:conf/cbmi/GiordanoKPS11 fatcat:jau2lmanqbhfdogtdm4lhn6fly

A multi-modal system for the retrieval of semantic video events

Arnon Amir, Sankar Basu, Giridharan Iyengar, Ching-Yung Lin, Milind Naphade, John R. Smith, Savitha Srinivasan, Belle Tseng
2004 Computer Vision and Image Understanding  
These classifiers are used to automatically annotate video with semantic labels, which in turn are used to search for new, untrained types of events and semantic concepts.  ...  The novelty of the approach lies in the: (1) semi-automatic construction of models of events from feature descriptors and (2) integration of content-based and concept-based querying in the search process  ...  Retrieval results for known item search The retrieval results for 38 known item topics is summarized in Table 5 . Up to 100 best matches were submitted for each topic.  ... 
doi:10.1016/j.cviu.2004.02.006 fatcat:enuxpfgaxbggphy6g2fwsgdmti

Semantic Web enabled digital repositories

Dimitrios A. Koutsomitropoulos, Georgia D. Solomou, Andreas D. Alexopoulos, Theodore S. Papatheodorou
2009 International Journal on Digital Libraries  
In particular, we show how, starting with a semi-structured knowledge model (like the one offered by DSpace), we can end up with inference-based knowledge discovery, retrieval, and navigation among the  ...  However, it is often the case that descriptive information about these assets, known as metadata, are usually semi-structured from a semantics point of view; implicit knowledge about this content may exist  ...  Therefore, we need a transition from an absent semantic model to an item-property-predicate situation, thus invoking the RDF semantics.  ... 
doi:10.1007/s00799-010-0059-z fatcat:5lhulqmydrcqldadez22xn2hzm

Open semantic annotation of scientific publications using DOMEO

Paolo Ciccarese, Marco Ocana, Tim Clark
2012 Journal of Biomedical Semantics  
Acknowledgements Development of Domeo was funded by a grant from the National Institute on Drug Abuse, National Institutes of Health, as part of the Neuroscience Information Framework; by a grant from  ...  We also thank Steve Pettifer of University of Manchester for the work toward integration of our tool with the Utopia PDF annotator.  ...  a "topic", representing an instance of one of several available annotation types.  ... 
doi:10.1186/2041-1480-3-s1-s1 pmid:22541592 pmcid:PMC3337259 fatcat:3ivqdirvdngqhjmuk7uualib4m

Semantic web portals: state‐of‐the‐art survey

Holger Lausen, Ying Ding, Michael Stollberg, Dieter Fensel, Rubén Lara Hernández, Sung‐Kook Han, John Davies
2005 Journal of Knowledge Management  
Web portals are entry points for information presentation and exchange over the internet used by a community of interest.  ...  Current Web technologies employed to build up these portals present serious limitations regarding facilities for searching, accessing, extracting, interpreting and processing for information.  ...  The underlying conceptual model is the K42 Topic Map model which defines the modeling primitives for Topic Maps in the sense of a representation ontology similar to RDF Schema.  ... 
doi:10.1108/13673270510622447 fatcat:gibk7kqpwrfhdlpusf6iigry2a

Semantic networks

Fritz Lehmann
1992 Computers and Mathematics with Applications  
The most promising solution is thought to be highly structured Knowledge Bases built using Knowledge Representation Systems (semantic networks and symbolic logic are two possible representation systems  ...  The conclusion argues for a synthesis of relational graph theory, graph-grmmnar theory and order theory based on semantic primitives and multiple intersecting inference hierarchies. • .. when controversies  ...  from time to time based on semantic descriptions of the model states.  ... 
doi:10.1016/0898-1221(92)90135-5 fatcat:4nli67lrsjdzdiu56i5ixwhm2a

Bridging the Semantic Gap Between Image Contents and Tags

Hao Ma, Jianke Zhu, Michael Rung-Tsong Lyu, Irwin King
2010 IEEE transactions on multimedia  
feature-based image similarity graph with the image-tag bipartite graph; 2) A novel random walk model is then proposed, which utilizes a fusion parameter to balance the influences between the image contents  ...  Index Terms-Content-based image retrieval, image annotation, random walk, text-based image retrieval.  ...  Based on the above consideration, we modify our model to use the following transition probability matrix: where matrix is the transition probability matrix with the entry of the th row and the th column  ... 
doi:10.1109/tmm.2010.2051360 fatcat:zipoonbsibbd7pcmd7pvbz3mze
« Previous Showing results 1 — 15 out of 8,553 results