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Author Miquel Ferrer; Ernest Valveny; F. Serratosa; K. Riesen; Horst Bunke edit  url
doi  openurl
  Title Generalized Median Graph Computation by Means of Graph Embedding in Vector Spaces Type Journal Article
  Year 2010 Publication Pattern Recognition Abbreviated Journal PR  
  Volume 43 Issue 4 Pages 1642–1655  
  Keywords Graph matching; Weighted mean of graphs; Median graph; Graph embedding; Vector spaces  
  Abstract The median graph has been presented as a useful tool to represent a set of graphs. Nevertheless its computation is very complex and the existing algorithms are restricted to use limited amount of data. In this paper we propose a new approach for the computation of the median graph based on graph embedding. Graphs are embedded into a vector space and the median is computed in the vector domain. We have designed a procedure based on the weighted mean of a pair of graphs to go from the vector domain back to the graph domain in order to obtain a final approximation of the median graph. Experiments on three different databases containing large graphs show that we succeed to compute good approximations of the median graph. We have also applied the median graph to perform some basic classification tasks achieving reasonable good results. These experiments on real data open the door to the application of the median graph to a number of more complex machine learning algorithms where a representative of a set of graphs is needed.  
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  Publisher Elsevier Place of Publication Editor  
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  Notes DAG Approved no  
  Call Number (up) DAG @ dag @ FVS2010 Serial 1294  
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Author Josep Llados; Dimosthenis Karatzas; Joan Mas; Gemma Sanchez edit  openurl
  Title A Generic Architecture for the Conversion of Document Collections into Semantically Annotated Digital Archives Type Journal
  Year 2008 Publication Journal of Universal Computer Science Abbreviated Journal  
  Volume 14 Issue 18 Pages 2912–2935  
  Keywords Median Graph, Graph Embedding, Graph Matching, Structural Pattern Recognition  
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  Notes DAG Approved no  
  Call Number (up) DAG @ dag @ LKM2008 Serial 1142  
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Author Josep Llados; J. Lopez-Krahe; D. Archambault edit  openurl
  Title Special Issue on Information Technologies for Visually Impaired People Type Journal
  Year 2007 Publication Novatica Abbreviated Journal  
  Volume 186 Issue Pages 4-7  
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  Notes DAG Approved no  
  Call Number (up) DAG @ dag @ LLA2007a Serial 903  
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Author Josep Llados; Dorothea Blostein edit  openurl
  Title Special Issue on Graphics Recognition Type Journal
  Year 2007 Publication International Journal on Document Analysis and Recognition Abbreviated Journal IJDAR  
  Volume 9 Issue 1 Pages 1–2  
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  Notes DAG Approved no  
  Call Number (up) DAG @ dag @ LlB2007 Serial 781  
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Author Josep Llados; Gemma Sanchez edit  openurl
  Title Graph Matching vs. Graph Parsing in Graphics Recognition: A Combined Approach Type Journal
  Year 2004 Publication International Journal of Pattern Recognition and Artificial Intelligence Abbreviated Journal IJPRAI  
  Volume 18 Issue 3 Pages 455–473  
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  Notes DAG; IF: 0.588 Approved no  
  Call Number (up) DAG @ dag @ LlS2004 Serial 445  
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