Search results for "spatial relationships"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
3	Benjamin Brombach, Erich Bruns, Oliver Bimber	Subobject detection through spatial relationships on mobile phones.	IUI	2009	DBLP DOI BibTeX RDF	museum guidance application, subobject detection, mobile computing, image classification, spatial relationships
3	Alberto Del Bimbo, Maurizio Campanai, Paolo Nesi	A Three-Dimensional Iconic Environment for Image Database Querying.	IEEE Trans. Software Eng.	1993	DBLP DOI BibTeX RDF	three-dimensional iconic environment, image database querying, pictorial databases, visual icon-based systems, symbolic projections, object spatial relationships, object spatial extensions, 3D icons, query processing, graphical user interfaces, visual databases, querying by example, spatial relationships, 3D interfaces, visual query, 2D strings
2	Trong-Ton Pham, Philippe Mulhem, Loïc Maisonnasse	Spatial relationships in visual graph modeling for image categorization.	SIGIR	2010	DBLP DOI BibTeX RDF	graph theory, language model, image categorization
2	Walaa Aly, Seiichi Uchida, Akio Fujiyoshi, Masakazu Suzuki	Statistical Classification of Spatial Relationships among Mathematical Symbols.	ICDAR	2009	DBLP DOI BibTeX RDF
2	Zhige Jia, Xiaoli Liu	Modeling Spatial Relationships for Remote Sensing Image Processing Based on Fuzzy Set Theory.	CSSE	2008	DBLP DOI BibTeX RDF
2	Ignacy R. Goralski, Christopher M. Gold	Maintaining the Spatial Relationships of Marine Vessels Using the Kinetic Voronoi Diagram.	ISVD	2007	DBLP DOI BibTeX RDF
2	P. Punitha, Naveen Onkarappa, D. S. Guru	Indexing of Document Images Based on Triangular Spatial Relationships.	ICCTA	2007	DBLP DOI BibTeX RDF
2	Ramazan Gokberk Cinbis, Selim Aksoy	Relative Position-Based Spatial Relationships using Mathematical Morphology.	ICIP	2007	DBLP DOI BibTeX RDF
2	Mohammad Reza Malek, Farid Karimipour, Saeed Nadi	Intuitionistic Fuzzy Spatial Relationships in Mobile GIS Environment.	WILF	2007	DBLP DOI BibTeX RDF
2	Stefano Berretti, Alberto Del Bimbo	Modeling Spatial Relationships between 3D Objects.	ICPR	2006	DBLP DOI BibTeX RDF
2	Mahoro Anabuki, Hiroshi Ishii	3D and sequential representations of spatial relationships among photos.	CHI Extended Abstracts	2006	DBLP DOI BibTeX RDF	camera tracking, photo organization, photomicrograph, slide show, 3D visualization, structure analysis
2	Stelian Coros, JingBo Ni, Pascal Matsakis	Object localization based on directional information case of 2D vector data.	GIS	2006	DBLP DOI BibTeX RDF	directional relationships, directional templates, f-templates, spatial templates, spatial relationships
2	Stefano Berretti, Alberto Del Bimbo, Pietro Pala	Description and retrieval of 3D face models using iso-geodesic stripes.	Multimedia Information Retrieval	2006	DBLP DOI BibTeX RDF	expression invariance, weighted walkthroughs, spatial relationships, 3D face recognition, geodesic distance
2	Grant J. Scott, Matt Klaric, Chi-Ren Shyu	Modeling Multi-object Spatial Relationships for Satellite Image Database Indexing and Retrieval.	CIVR	2005	DBLP DOI BibTeX RDF
2	SooCheol Lee, Eenjun Hwang, YangKyoo Lee	Using 3D Spatial Relationships for Image Retrieval by XML Annotation.	ICCSA	2004	DBLP DOI BibTeX RDF
2	SooCheol Lee, Sieun Lee, Eenjun Hwang	Reducing Spatial Relationships for Efficient Image Retrieval.	ICADL	2003	DBLP DOI BibTeX RDF
2	Isabelle Bloch	Fuzzy Spatial Relationships for Model-Based Pattern Recognition in Images and Spatial Reasoning Under Imprecision.	WILF	2003	DBLP DOI BibTeX RDF
2	Kent K. T. Cheung, Horace Ho-Shing Ip	Semantic Retrieval by Spatial Relationships.	ICPR	2002	DBLP DOI BibTeX RDF
2	Isabelle Bloch	Unifying Quantitative, Semi-quantitative and Qualitative Spatial Relation Knowledge Representations Using Mathematical Morphology.	Theoretical Foundations of Computer Vision	2002	DBLP DOI BibTeX RDF	mathematical morphology, spatial reasoning, spatial relationships
2	Harith Alani, Christopher B. Jones, Douglas Tudhope	Associative and Spatial Relationships in Thesaurus-Based Retrieval.	ECDL	2000	DBLP DOI BibTeX RDF
2	Sisi Zlatanova	On 3D Topological Relationships. (PDF / PS)	DEXA Workshops	2000	DBLP DOI BibTeX RDF	3D topological relationships, multidimensional simple objects, nine-intersections model, geographic information system, spatial database, visual databases, spatial relationships, three dimensional space, 3D space
2	Omar Javed, Sohaib Khan, Zeeshan Rasheed, Mubarak Shah	Camera Handoff: Tracking in Multiple Uncalibrated Stationary Cameras. (PDF / PS)	Workshop on Human Motion	2000	DBLP DOI BibTeX RDF	camera handoff, human motion tracking, multiple uncalibrated stationary cameras, multiple perspective imagery, object correspondence, camera field of view, visibility, camera calibration, cameras, disambiguation, spatial relationships, activity monitoring, optical tracking, image motion analysis, perspective views, image processing equipment
2	Hirohiko Sagawa, Masaru Takeuchi	A Method for Analyzing Spatial Relationships Between Words in Sign Language Recognition.	Gesture Workshop	1999	DBLP DOI BibTeX RDF
2	Pascal Matsakis, Laurent Wendling	A New Way to Represent the Relative Position between Areal Objects.	IEEE Trans. Pattern Anal. Mach. Intell.	1999	DBLP DOI BibTeX RDF	parameter extraction, fuzzy subsets, Pattern recognition, spatial relationships
2	Chuan-Heng Ang, Tok Wang Ling, Xiao Ming Zhou	Qualitative Spatial Relationships Representation IO&T and its Retrieval.	DEXA	1998	DBLP DOI BibTeX RDF
2	Mohammad Nabil, John Shepherd, Anne H. H. Ngu	2D Projection Interval Relationships: A Symbolic Representation of Spatial Relationships.	SSD	1995	DBLP DOI BibTeX RDF
2	T. A. Bayer, H. Walischewski	Experiments on extracting structural information from paper documents using syntactic pattern. (PDF / PS)	ICDAR	1995	DBLP DOI BibTeX RDF	syntactic pattern analysis, daily document processing, index terms, document topics, lexical entities, lexical relationships, primitive objects, pattern recognition, knowledge acquisition, document image processing, semantic networks, error rates, spatial relationships, structural information, semantic net, geometric properties, paper documents
2	Volker Haarslev	Formal Semantics of Visual Languages using Spatial Reasoning. (PDF / PS)	VL	1995	DBLP DOI BibTeX RDF	qualitative spatial relationships, description logic theory, convex regions, semantics specifications, Pictorial Janus, graphical theorem proving, formal specification, visual programming, visual languages, visual languages, formal semantics, algebraic specification, spatial reasoning, spatial reasoning, points, automatic verification, lines, spatial logic, visual reasoning, geometrical objects
2	James W. Modestino, Jun Zhang 0006	A Markov Random Field Model-Based Approach to Image Interpretation.	IEEE Trans. Pattern Anal. Mach. Intell.	1992	DBLP DOI BibTeX RDF	Markov random field model-based approach, disjoint regions, object labels, extracted feature measurements, interpretation labels, pattern recognition, pattern recognition, graph theory, simulated annealing, simulated annealing, picture processing, picture processing, Markov processes, domain knowledge, spatial relationships, image interpretation, synthetic images, adjacency graph, real-world images
1	Biao Jin, Wenlong Hu, Hongqi Wang	Image Classification Based on pLSA Fusing Spatial Relationships Between Topics.	IEEE Signal Process. Lett.	2012	DBLP DOI BibTeX RDF
1	Utpal Paul, Anand Prabhu Subramanian, Milind M. Buddhikot, Samir R. Das	Understanding spatial relationships in resource usage in cellular data networks.	INFOCOM Workshops	2012	DBLP DOI BibTeX RDF
1	Benjamin Rosman, Subramanian Ramamoorthy	Learning spatial relationships between objects.	I. J. Robotic Res.	2011	DBLP DOI BibTeX RDF
1	Eugen Ganea, Marius Brezovan	Image Indexing by Spatial Relationships between Salient Objects.	FedCSIS	2011	DBLP BibTeX RDF
1	Naeem Bhatti, Allan Hanbury	Morphology Based Spatial Relationships between Local Primitives in Line Drawings.	CIARP	2011	DBLP DOI BibTeX RDF
1	Nguyen Vu Hoàng, Valérie Gouet-Brunet, Marta Rukoz	A Cartography of Spatial Relationships in a Symbolic Image Database.	CAIP	2011	DBLP DOI BibTeX RDF
1	Paul G. Clifton	Spatial relationships: a framework for understanding the relationships between real and virtual spaces.	Tangible and Embedded Interaction	2011	DBLP DOI BibTeX RDF
1	Matthew Canton	The presence table: a reactive surface for ambient connection.	Tangible and Embedded Interaction	2011	DBLP DOI BibTeX RDF
1	Paul Harris, Chris Brunsdon	Exploring spatial variation and spatial relationships in a freshwater acidification critical load data set for Great Britain using geographically weighted summary statistics.	Computers & Geosciences	2010	DBLP DOI BibTeX RDF
1	Pascal Matsakis, Laurent Wendling, JingBo Ni	A General Approach to the Fuzzy Modeling of Spatial Relationships.	Methods for Handling Imperfect Spatial Information	2010	DBLP DOI BibTeX RDF
1	Hasitha Bimsara Ariyaratne, Koichi Harada	Content based Image Retrieval using Spatial Relationships between Dominant Colours of Image Segments.	VISAPP	2010	DBLP BibTeX RDF
1	Adrien Delaye, Éric Anquetil	Learning spatial relationships in hand-drawn patterns using fuzzy mathematical morphology.	SoCPaR	2010	DBLP DOI BibTeX RDF
1	Vishwakarma Singh, Arnab Bhattacharya, Ambuj K. Singh	Querying spatial patterns.	EDBT	2010	DBLP DOI BibTeX RDF
1	Kentaro Ishii, Akihiko Ishida, Greg Saul, Masahiko Inami, Takeo Igarashi	Active navigation landmarks for a service robot in a home environment.	HRI	2010	DBLP DOI BibTeX RDF	active landmarks, end-user interface, infrared communication, robot navigation, navigation path
1	Hideaki Kuzuoka, Yuya Suzuki, Jun Yamashita, Keiichi Yamazaki	Reconfiguring spatial formation arrangement by robot body orientation.	HRI	2010	DBLP DOI BibTeX RDF	body torque, f-formation, human-robot interaction, communication robot
1	Walaa Aly, Seiichi Uchida, Masakazu Suzuki	Automatic Classification of Spatial Relationships among Mathematical Symbols Using Geometric Features.	IEICE Transactions	2009	DBLP BibTeX RDF
1	Peng-Yeng Yin, Chin-Wen Liu	A new relevance feedback technique for iconic image retrieval based on spatial relationships.	Journal of Systems and Software	2009	DBLP DOI BibTeX RDF
1	Aline Deruyver, Yann Hodé	Qualitative spatial relationships for image interpretation by using a conceptual graph.	Image Vision Comput.	2009	DBLP DOI BibTeX RDF
1	Wafa Maghrebi, Mohamed A. Khabou, Adel M. Alimi	Extraction of Fuzzy Spatial Relationships for Multi Objects Indexing of Historic Mosaic Images.	IPCV	2009	DBLP BibTeX RDF
1	JingBo Ni, Melanie A. Veltman, Pascal Matsakis	Directional Force Field-Based Maps: Implementation and Application.	CAIP	2009	DBLP DOI BibTeX RDF	spatial relationships, force fields, directional maps, scene matching
1	Hideyuki Fujita, Masatoshi Arikawa	Spatial sorting function for a map-based slideshow editor.	GIS	2009	DBLP DOI BibTeX RDF	photo mapping, photo storytelling, map, photo
1	Deepti Joshi, Ashok Samal, Leen-Kiat Soh	A dissimilarity function for clustering geospatial polygons.	GIS	2009	DBLP DOI BibTeX RDF	clustering, polygons, spatial data mining, regionalization
1	Stephen Somogyi, Thomas F. Wenisch, Anastasia Ailamaki, Babak Falsafi	Spatio-temporal memory streaming.	ISCA	2009	DBLP DOI BibTeX RDF	prefetching, spatial correlation, temporal correlation
1	Richard Frank, Martin Ester, Arno J. Knobbe	A multi-relational approach to spatial classification.	KDD	2009	DBLP DOI BibTeX RDF	spatial classification, parallelization, aggregation, spatial data mining
1	Douglas Boari, Mike Fraser	Taking shortcuts: embedded physical interfaces for spatial navigation.	Tangible and Embedded Interaction	2009	DBLP DOI BibTeX RDF	interactive embedded interfaces, physical embodiment, spatial navigation
1	Gunther H. Weber, Oliver Rübel, Min-Yu Huang, Angela H. DePace, Charless C. Fowlkes, Soile V. E. Keränen, Cris L. Luengo Hendriks, Hans Hagen, David W. Knowles, Jitendra Malik, Mark D. Biggin, Bernd Hamann	Visual Exploration of Three-Dimensional Gene Expression Using Physical Views and Linked Abstract Views.	IEEE/ACM Trans. Comput. Biology Bioinform.	2009	DBLP DOI BibTeX RDF	three-dimensional gene expression, spatial expression patterns, physical views, multiple linked views, visualization, information visualization, brushing, Interactive data exploration, scatter plots
1	Yaregal Assabie, Josef Bigün	HMM-Based Handwritten Amharic Word Recognition with Feature Concatenation.	ICDAR	2009	DBLP DOI BibTeX RDF
1	Khurram Khurshid, Claudie Faure, Nicole Vincent	Fusion of Word Spotting and Spatial Information for Figure Caption Retrieval in Historical Document Images.	ICDAR	2009	DBLP DOI BibTeX RDF
1	Pan Gang, Jiawan Zhang, Xiaozhou Zhou, Jizhou Sun	Skeletal Texture Synthesis.	CGIV	2009	DBLP DOI BibTeX RDF
1	Liang Lu, Camilo Ordonez, Emmanuel G. Collins Jr., Edmond M. DuPont	Terrain surface classification for autonomous ground vehicles using a 2D laser stripe-based structured light sensor.	IROS	2009	DBLP DOI BibTeX RDF
1	Philipp Vorst, Andreas Zell	Particle filter-based trajectory estimation with passive UHF RFID fingerprints in unknown environments.	IROS	2009	DBLP DOI BibTeX RDF
1	Chuho Yi, Il Hong Suh, Gi Hyun Lim, Byung-Uk Choi	Bayesian robot localization using spatial object contexts.	IROS	2009	DBLP DOI BibTeX RDF
1	Bernd Hentschel, Marc Wolter, Torsten Kuhlen	Virtual Reality-Based Multi-View Visualization of Time-Dependent Simulation Data.	VR	2009	DBLP DOI BibTeX RDF
1	Stefan Bruckner, Veronika Soltészová, Eduard Gröller, Jirí Hladuvka, Katja Bühler, Jai Y. Yu, Barry J. Dickson	BrainGazer - Visual Queries for Neurobiology Research.	IEEE Trans. Vis. Comput. Graph.	2009	DBLP DOI BibTeX RDF
1	Carlos D. Correa, Kwan-Liu Ma	The Occlusion Spectrum for Volume Classification and Visualization.	IEEE Trans. Vis. Comput. Graph.	2009	DBLP DOI BibTeX RDF
1	Denis Kalkofen, Erick Méndez, Dieter Schmalstieg	Comprehensible Visualization for Augmented Reality.	IEEE Trans. Vis. Comput. Graph.	2009	DBLP DOI BibTeX RDF
1	Nikolai A. Svakhine, David S. Ebert, William M. Andrews	Illustration-Inspired Depth Enhanced Volumetric Medical Visualization.	IEEE Trans. Vis. Comput. Graph.	2009	DBLP DOI BibTeX RDF
1	Karsten Scheibe, Fay Huang, Reinhard Klette	Calibration of Rotating Sensors.	CAIP	2009	DBLP DOI BibTeX RDF
1	Nicole M. Artner, Adrian Ion, Walter G. Kropatsch	Rigid Part Decomposition in a Graph Pyramid.	CIARP	2009	DBLP DOI BibTeX RDF
1	Su-Yin Tan, Robert Haining	An Urban Study of Crime and Health Using an Exploratory Spatial Data Analysis Approach.	ICCSA	2009	DBLP DOI BibTeX RDF	Deprivation, Spatial Regression, Spatial Error Model, Moran’s I, Sheffield, Health, Spatial Autocorrelation, LISA, Crime, UK
1	Shrinivas J. Pundlik, Stanley T. Birchfield	Motion-Based View-Invariant Articulated Motion Detection and Pose Estimation Using Sparse Point Features.	ISVC	2009	DBLP DOI BibTeX RDF
1	Itaru Otomaru, Kazuto Kobayashi, Toshiyuki Okada, Masahiko Nakamoto, Yoshiyuki Kagiyama, Masaki Takao, Nobuhiko Sugano, Yukio Tada, Yoshinobu Sato	Expertise Modeling for Automated Planning of Acetabular Cup in Total Hip Arthroplasty Using Combined Bone and Implant Statistical Atlases.	MICCAI	2009	DBLP DOI BibTeX RDF
1	Sameer Singh, Wei Ren, Maneesha Singh	A Novel Approach to Spatio-Temporal Video Analysis and Retrieval.	MIRAGE	2009	DBLP DOI BibTeX RDF
1	Hele-Mai Haav, Aivi Kaljuvee, Martin Luts, Toivo Vajakas	Ontology-Based Retrieval of Spatially Related Objects for Location Based Services.	OTM Conferences	2009	DBLP DOI BibTeX RDF	Ontology-based information retrieval, domain ontology modelling, mobile IS, personalised LBS, semantic LBS
1	Yi Yin, Kazuaki Hida, Yoshiaki Katayama, Naohisa Takahashi	Implementation of Filter Reverse Search System based on Spatial Relationships of Filters.	JCIT	2008	DBLP BibTeX RDF
1	Yi Yin, Yoshiaki Katayama, Naohisa Takahashi	Detection of Conflicts Caused by a Combination of Filters Based on Spatial Relationships.	JIP	2008	DBLP DOI BibTeX RDF
1	Stefano Berretti, Alberto Del Bimbo, Pietro Pala	3D face retrieval using integral geometric shape information.	CIVR	2008	DBLP DOI BibTeX RDF	expression invariance, weighted walkthroughs, spatial relationships, 3D face recognition, geodesic distance
1	Adam Jones, J. Edward Swan II, Gurjot Singh, Eric Kolstad, Stephen R. Ellis	The effects of virtual reality, augmented reality, and motion parallax on egocentric depth perception.	APGV	2008	DBLP DOI BibTeX RDF	virtual reality, augmented reality, depth perception, motion parallax
1	Maruthappan Shanmugasundaram, Pourang Irani	The effect of animated transitions in zooming interfaces.	AVI	2008	DBLP DOI BibTeX RDF	information visualization, animation, zooming interfaces
1	Jie Yu, Jiebo Luo	Leveraging probabilistic season and location context models for scene understanding.	CIVR	2008	DBLP DOI BibTeX RDF	context-aware scene understanding, object/ region detection, season and location proximity, image retrieval, spatial context
1	Helen Balinsky, Anthony Wiley, Michael Rhodes, Alfie Abdul-Rahman	Automated repurposing of implicitly structured documents.	ACM Symposium on Document Engineering	2008	DBLP DOI BibTeX RDF	cap-height, document repurposing, hierarchical metrics and structure, injective mapping, x-height
1	Christian Sallaberry, Mauro Gaio, Damien Palacio, Julien Lesbegueries	Fuzzying GIS topological functions for GIR needs.	GIR	2008	DBLP DOI BibTeX RDF	spatial feature, spatial information indexing and retrieval, textual digital library, spatial relationship
1	Minh Duc Nguyen, Hélène Waeselynck, Nicolas Riviere	Testing mobile computing applications: toward a scenario language and tools.	WODA	2008	DBLP DOI BibTeX RDF	scenario language, testing, graph matching, mobile computing systems
1	Thomas Pintaric, Hannes Kaufmann	A rigid-body target design methodology for optical pose-tracking systems.	VRST	2008	DBLP DOI BibTeX RDF	6-DOF pose-tracking, marker constellation, model-based object tracking, target design, optical tracking, rigid body
1	Fadi K. Deeb, Ludovít Niepel	A methodology for discovering spatial co-location patterns.	AICCSA	2008	DBLP DOI BibTeX RDF
1	Gang Cheng, Qingyun Du, Hongli Ma	The Design and Implementation of Ontology and Rules Based Knowledge Base for Transportation.	CSSE	2008	DBLP DOI BibTeX RDF
1	Carolina Galleguillos, Andrew Rabinovich, Serge Belongie	Object categorization using co-occurrence, location and appearance.	CVPR	2008	DBLP DOI BibTeX RDF
1	Bryan S. Morse, Damon Gerhardt, Cameron H. Engh, Michael A. Goodrich, Nathan D. Rasmussen, Daniel R. Thornton, Dennis Eggett	Application and evaluation of spatiotemporal enhancement of live aerial video using temporally local mosaics.	CVPR	2008	DBLP DOI BibTeX RDF
1	Long Zhu, Yuanhao Chen, Yifei Lu, Chenxi Lin, Alan L. Yuille	Max Margin AND/OR Graph learning for parsing the human body.	CVPR	2008	DBLP DOI BibTeX RDF
1	Kivanc M. Ozonat	An information-theoretic approach to detecting performance anomalies and changes for large-scale distributed web services.	DSN	2008	DBLP DOI BibTeX RDF
1	María Josefa Somodevilla García, Ivo Humberto Pineda Torres, José Tecuapacho Zecua	Framework for Discovering Association Rules in a Fuzzy Data Cube.	ENC	2008	DBLP DOI BibTeX RDF
1	Michael D. Lieberman, Jagan Sankaranarayanan, Hanan Samet, Jon Sperling	Augmenting spatio-textual search with an infectious disease ontology.	ICDE Workshops	2008	DBLP DOI BibTeX RDF
1	Alexandros Bouganis, Murray Shanahan	Flexible object recognition in cluttered scenes using relative point distribution models.	ICPR	2008	DBLP DOI BibTeX RDF
1	Jun Xie, Min Hu, Mubarak Shah	Unfolding warping for object recognition.	ICPR	2008	DBLP DOI BibTeX RDF
1	Anahid Bassiri, Ali A. Alesheikh	Spatio-temporal topological relationships based on rough set.	IEEE ICCI	2008	DBLP DOI BibTeX RDF
1	Shu Chen, Yingying Chen, Wade Trappe	Exploiting Environmental Properties for Wireless Localization and Location Aware Applications.	PerCom	2008	DBLP DOI BibTeX RDF	wireless localization, environmental parameters, sensor networks
1	Daniel Pustka, Manuel Huber, Gudrun Klinker	Integrating Gyroscopes into Ubiquitous Tracking Environments.	VR	2008	DBLP DOI BibTeX RDF
1	Prabhat, Andrew S. Forsberg, Michael Katzourin, Kristi Wharton, Mel Slater	A Comparative Study of Desktop, Fishtank, and Cave Systems for the Exploration of Volume Rendered Confocal Data Sets.	IEEE Trans. Vis. Comput. Graph.	2008	DBLP DOI BibTeX RDF
1	Astrid Franz, Robin Wolz, Tobias Klinder, Cristian Lorenz, Hans Barschdorf, Thomas Blaffert, Sebastian P. M. Dries, Steffen Renisch	Simultaneous Model-Based Segmentation of Multiple Objects.	Bildverarbeitung für die Medizin	2008	DBLP DOI BibTeX RDF
1	Luc Brun, Jean-Hugues Pruvot	Hierarchical Matching Using Combinatorial Pyramid Framework.	ICISP	2008	DBLP DOI BibTeX RDF
1	Zhihui Hu, Howard Leung, Yun Xu	Automated Chinese Handwriting Error Detection Using Attributed Relational Graph Matching.	ICWL	2008	DBLP DOI BibTeX RDF	Chinese handwriting error detection, stroke spatial relationship error, stroke spatial relationship error, error-tolerant graph matching, attributed relational graph