Tomáš Skopal, Assoc. Prof.

skopal<at>ksi.mff.cuni.cz
chair of department, associate professor

Research groups

Siret

Research topics

  • similarity search in metric and nonmetric spaces
  • multimedia databases
  • database indexing
  • information retrieval

Teachingtop

CodeTitleLinks
NDBI025Database Systems
NDBI034Multimedia Retrieval
NDBI038Searching the web
NDBI042Data Visualization Techniques
NPRG045Individual Software Project
NSWI122Dissertation Thesis Preparation

Ph.D. studentstop

Current: Tomáš Grošup, M.Sc., Jan Jelínek, M.Sc.

Former: Tomáš Bartoš, Ph.D., Jakub Galgonek, Ph.D., David Hoksza, Ph.D., Jakub Lokoč, Ph.D., Juraj Moško, M.Sc., Jiří Novák, Ph.D.

Supervised thesestop

TitleStudentTypeStartedDefended
Similarity analytics driven by implicit user feedbackMartin SychraPh.D.2016
Online system for shift and schedule management for doctors Tatsiana MaksimenkaBS2016
Application for automatic recognition of textures in map dataPeter ŠípošMS2015
Extensible Modeling Framework for Similarity AnalyticsTomáš GrošupPh.D.2014
Algorithmic prediction of protein-protein interactionsJan JelínekPh.D.2014
Line of sight testingAdam LutkaBS20142014
Algorithms for business document detection using templatesJakub MichalkoMS20132016
Algorithms for business document detection using templatesJakub MichalkoMS20132016
How's my connection? An assistent in mass transportation system of PragueMiroslav HrivíkMS20122013
Leaf Recognition for SmartphonesLukáš TomasyMS20122015
Realty theft guardJan ŠaršonMS2012
Face Recognition in Social NetworksPavel MachBS20122012
Exploration of Multimedia CollectionsJuraj MoškoPh.D.20112016
Indexing Arbitrary Similarity ModelsTomáš BartošPh.D.20102014
Modification of Pivot Tables method for persistent metric indexingJuraj MoškoMS20102011
Similarity search in Mass Spectra DatabasesJiří NovákPh.D.20092013
Native indexing of large XML databasesTomáš BartošMS20092010
Intelligent flight ticket search engineMargaréta HiekeováBS20092010
Fractal compression of time seriesMartin LysíkMS20082009
Czech text diacritizationBoris DušekBS20082010
Similarity Search in Protein Structure DatabasesJakub GalgonekPh.D.20082012
Object extraction from complex imagesŠtefan ČudaiMS20082010
Home gastronomic advisorJakub JelínekBS20082009
Automatization of hierarchical experimentsMartin BabkaBS20082008
External Metric Hashing using the D-indexJiří JaklMS20072009
Tree-based indexing methods for similarity search in metric and nonmetric spacesJakub LokočPh.D.20072010
Eliptic indexing of multidimensional databasesOndrej DankoMS20072008
Plagiarism Detection in Research PapersDavid ŠináglMS2006
An Educational Application for Relational Calculus Query EvaluationViliam SabolBS20062007
An Educational Application for Relational Algebra Query EvaluationMartin LysíkBS20062007
Melody extraction from audio signalJan RázgaBS2006
Multidimensional indexing using the I-GridLadislav VincourekBS2006
Multidimensional indexing using the VA-fileStanislav FajtBS20062007
Fractal GeneratorVojtěch PolákBS2006
System for Image VectorizationJan KlímaBS20062007
Experimental Vector Data GeneratorMichal KobzaBS2006
Similarity Search in Protein DatabasesDavid HokszaPh.D.20062010
Similarity Modeling using Neural Networks for Image RetrievalMiroslav PichMS2006
Courseware for Database Transaction ProcessingDung Nguyen TienBS20052007
Word-to-LaTeX convertorMichal KebrtBS20052006
An ER editor supporting conversions to relational modelHana KozelkováBS20052006
Multidimensional Indexing for relational DBMSDavid HokszaMS20042006

Research grantstop

  • Efficient subgraph discovery for petabyte-scale web analysis (GACR 15-08916S) 2015-2017 cooperant
  • Non-Metric Similarity Searching in Very Large Complex Databases (GACR P202/11/0968) 2011-2014 head investigator
  • Social Network of the Computer Scientists in the Regions of the Czech Republic (EU CZ1.07/2.4.00/12.0039) 2009-2012 cooperant
  • Modern Methods, Structures and Systems of Computer Science (MSMT MSM0021620838) 2005-2011 cooperant
  • Similarity Searching in Very Large Multimedia Databases (GACR 201/09/0683) 2009-2011 investigator
  • (show all)

Publicationstop

2017

Refereed (journals/proceedings) (1)

  • [IF Journal]Bača R., Krátký M., Holubová I., Nečaský M., Skopal T., Svoboda M., Sakr S.: Structural XML Query Processing, in ACM Computing Surveys, Vol. 50, Num. 5, ISSN: 0360-0300, pp. 1-41, 2017

2016

Refereed (journals/proceedings) (3)

  • Kuboň D., Blažek A., Lokoč J., Skopal T.: Multi-sketch Semantic Video Browser, in MultiMedia Modeling, Miami, FL, USA, Springer International Publishing, ISBN: 978-3-319-27673-1, ISSN: 0302-9743, pp. 406-411, 2016
  • Lokoč J., Kohout J., Čech P., Skopal T., Pevný T.: k-NN Classification of Malware in HTTPS Traffic Using the Metric Space Approach, in Intelligence and Security Informatics, Auckland, New Zealand, Springer International Publishing, ISBN: 978-3-319-31862-2, ISSN: 0302-9743, pp. 131-145, 2016
  • Macík M., Lokoč J., Čech P., Skopal T.: Particle physics model for content-based 3D exploration, in Content-Based Multimedia Indexing (CBMI), 2016, Bucharest, Romania, IEEE Computer Society, ISBN: 978-1-4673-8695-1, pp. 1-6, 2016

2015

Refereed (journals/proceedings) (6)

  • Blažek A., Lokoč J., Matzner F., Skopal T.: Enhanced Signature-based Video Browser, in MultiMedia Modeling, Sydney, Australia, Springer International Publishing, ISBN: 978-3-319-14441-2, ISSN: 0302-9743, pp. 243-248, 2015 - text
  • Grošup T., Čech P., Lokoč J., Skopal T.: A Web Portal For Effective Multi-model Exploration, in MultiMedia Modeling, Sydney, Australia, Springer International Publishing, ISBN: 978-3-319-14441-2, ISSN: 0302-9743, pp. 315-318, 2015 - text
  • [IF Journal]Kruliš M., Lokoč J., Skopal T.: Efficient Extraction of Clustering-Based Feature Signatures Using GPU Architectures, in Multimedia Tools and Applications, Vol. 2015, Num. 27.6.2015, ISSN: 1380-7501, pp. 1-33, 2015 - text
  • Lokoč J., Münzer B., Schoeffmann K., del Fabro M., Primus M. J., Skopal T., Lánský J.: What are the salient keyframes in short casual videos? an extensive user study using a new video dataset, in 2015 IEEE International Conference on Multimedia & Expo Workshops (ICMEW), Turin, Italy, IEEE, ISBN: 978-1-4799-7079-7, pp. 1-6, 2015 - text
  • Moško J., Lokoč J., Grošup T., Čech P., Skopal T., Jan L.: Evaluating Multilayer Multimedia Exploration, in Lecture Notes in Computer Science, Glasgow, Springer, ISBN: 978-3-319-25087-8, ISSN: 0302-9743, pp. 162-169, 2015 - text
  • Moško J., Lokoč J., Grošup T., Čech P., Skopal T., Jan L.: MLES: Multilayer Exploration Structure for Multimedia Exploration, in Communications in Computer and Information Science, Poitiers, Springer, ISBN: 978-3-319-23201-0, ISSN: 1865-0929, pp. 135-144, 2015 - text

2014

Refereed (journals/proceedings) (7)

  • Barrios J. M., Bustos B., Skopal T.: Analyzing and dynamically indexing the query set, in Information Systems, Vol. 45, Num. September, ISSN: 0306-4379, pp. 37-47, 2014
  • Blažek A., Lokoč J., Skopal T.: Video Retrieval with Feature Signature Sketches, in Similarity Search and Applications, San Jose Los Cabos, Mexico, Springer International Publishing, ISBN: 978-3-319-11987-8, ISSN: 0302-9743, pp. 25-36, 2014
  • Lokoč J., Blažek A., Skopal T.: On Effective Known Item Video Search Using Feature Signatures, in ICMR '14 Proceedings of International Conference on Multimedia Retrieval, Glasgow, United Kingdom, ACM, ISBN: 978-1-4503-2782-4, pp. 524-526, 2014
  • Lokoč J., Blažek A., Skopal T.: Signature-based Video Browser, in MultiMedia Modeling, Dublin, Ireland, Springer International Publishing, ISBN: 978-3-319-04116-2, ISSN: 0302-9743, pp. 415-418, 2014
  • Lokoč J., Grošup T., Čech P., Skopal T.: Towards efficient multimedia exploration using the metric space approach, in Content-Based Multimedia Indexing (CBMI), 2014, Klagenfurt, Austria, IEEE Computer Society, ISBN: 978-1-4799-3990-9, ISSN: 1949-3991, pp. 1-4, 2014
  • Lokoč J., Moško J., Čech P., Skopal T.: On indexing metric spaces using cut-regions, in Information Systems, Vol. 43, Num. July, ISSN: 0306-4379, pp. 1-19, 2014
  • Moško J., Skopal T., Bartoš T., Lokoč J.: Real-Time Exploration of Multimedia Collections, in Lecture Notes in Computer Science, Brisbane, QLD, Australia, Springer, ISBN: 978-3-319-08608-8, ISSN: 0302-9743, pp. 198-205, 2014

2013

Refereed (journals/proceedings) (10)

  • Bartoš T., Skopal T.: Designing Similarity Indexes with Parallel Genetic Programming, in Lecture Notes in Computer Science, A Coruña, Spain, Springer Berlin Heidelberg, ISBN: 978-3-642-41061-1, ISSN: 0302-9743, pp. 294-299, 2013
  • Bartoš T., Skopal T., Moško J.: Efficient Indexing of Similarity Models with Inequality Symbolic Regression, in GECCO'13: PROCEEDINGS OF THE 2013 GENETIC AND EVOLUTIONARY COMPUTATION CONFERENCE, Amsterdam, ACM, ISBN: 978-1-4503-1963-8, pp. 901-908, 2013
  • Bartoš T., Skopal T., Moško J.: Towards Efficient Indexing of Arbitrary Similarity, in SIGMOD Record, Vol. 42, Num. 2, ISSN: 0163-5808, pp. 5-10, 2013
  • Galgonek J., Skopal T., Hoksza D.: P3S: Protein Structure Similarity Search, in Euro-Par 2012: Parallel Processing Workshops, Rhodes Islands, Greece, Springer Berlin Heidelberg, ISBN: 978-3-642-36948-3, ISSN: 0302-9743, pp. 228-237, 2013
  • Hetland M. L., Skopal T., Lokoč J., Beecks C.: Ptolemaic access methods: Challenging the reign of the metric space model, in Information Systems, Vol. 38, Num. 7, ISSN: 0306-4379, pp. 989-1006, 2013
  • Kruliš M., Lokoč J., Skopal T.: Efficient Extraction of Feature Signatures Using Multi-GPU Architecture, in Advances in Multimedia Modeling, Huangshan, China, Springer Heidelberg Dordrecht, ISBN: 978-3-642-35727-5, ISSN: 0302-9743, pp. 446-456, 2013
  • Lokoč J., Grošup T., Skopal T.: On Scalable Approximate Search with the Signature Quadratic Form Distance, in 6th International Conference, SISAP 2013, La Coruna, Spain, Springer, ISBN: 978-3-642-41062-8, ISSN: 0302-9743, pp. 312-318, 2013
  • Lokoč J., Navrátil L., Toušek J., Skopal T.: Dynamic Multimedia Exploration Using SIFT Matching, in ICMR '13 Proceedings of the 3rd ACM conference on International conference on multimedia retrieval, Dallas, Texas, USA, ACM, ISBN: 978-1-4503-2033-7, pp. 305-306, 2013
  • Novák J., Sachsenberg T., Hoksza D., Skopal T., Kohlbacher O.: A Statistical Comparison of SimTandem with State-of-the-Art Peptide Identification Tools, in Advances in Intelligent Systems and Computing, Vol. 2013, Num. 222, ISSN: 1867-5662, pp. 101-109, 2013
  • Novák J., Sachsenberg T., Hoksza D., Skopal T., Kohlbacher O.: On Comparison of SimTandem with State-of-the-Art Peptide Identification Tools, Efficiency of Precursor Mass Filter and Dealing with Variable Modifications, in Journal of Integrative Bioinformatics, Vol. 2013, Num. 10/3, ISSN: 1613-4516, pp. nestránkováno, 2013

2012

Refereed (journals/proceedings) (15)

  • Barrios J. M., Bustos B., Skopal T.: Snake Table: A Dynamic Pivot Table for Streams of k-NN Searches, in Lecture Notes in Computer Science, Vol. 7404, Num. 2012, ISSN: 0302-9743, pp. 25-39, 2012
  • Bartoš T., Skopal T.: Revisiting Techniques for Lowerbounding the Dynamic Time Warping Distance, in Lecture Notes in Computer Science, Vol. 7404, Num. 2012, ISSN: 0302-9743, pp. 192-208, 2012
  • Bustos B., Kreft S., Skopal T.: Adapting Metric Indexes for Searching in Multi-Metric Spaces, in Multimedia Tools and Applications, Vol. 58, Num. 3, ISSN: 1380-7501, pp. 467-496, 2012
  • [IF Journal]Kruliš M., Skopal T., Lokoč J., Beecks C.: Combining CPU and GPU architectures for fast similarity search, in DISTRIBUTED AND PARALLEL DATABASES, Vol. 30, Num. 3-4, ISSN: 0926-8782, pp. 179-207, 2012
  • Lokoč J., Čech P., Novák J., Skopal T.: Cut-region: A Compact Building Block For Hierarchical Metric Indexing, in Lecture Notes in Computer Science, Vol. 2012, Num. 7404, ISSN: 0302-9743, pp. 85-100, 2012
  • Lokoč J., David N., Michal B., Skopal T.: Visual Image Search: Feature Signatures or/and Global Descriptors, in Lecture Notes in Computer Science, Vol. 2012, Num. 7404, ISSN: 0302-9743, pp. 177-191, 2012
  • Lokoč J., Grošup T., Skopal T.: Image Exploration using Online Feature Extraction and Reranking, in ICMR '12 Proceedings of the 2nd ACM International Conference on Multimedia Retrieval, Hongkong, China, ACM, ISBN: 978-1-4503-1329-2, pp. 1-2, 2012
  • Lokoč J., Grošup T., Skopal T.: SIR: The Smart Image Retrieval Engine, in Lecture Notes in Computer Science, Vol. 2012, Num. 7404, ISSN: 0302-9743, pp. 240-241, 2012
  • Lokoč J., Skopal T., Christian B., Thomas S.: Similarity Search by Earth Movers Distance using Nonmetric Ground Distances, in MMEDIA 2012, The Fourth International Conferences on Advances in Multimedia, Chamonix, XPS, ISBN: 978-1-61208-195-3, pp. 50-55, 2012
  • Lokoč J., Wünschmann J., Skopal T., Rothermel A.: Similarity Search in 3D Object-Based Video Data, in CIKM '12 Proceedings of the 21st ACM international conference on Information and knowledge management, Maui, Hawaii, USA, ACM, ISBN: 978-1-4503-1156-4, pp. 2655-2658, 2012
  • Novák J., Galgonek J., Hoksza D., Skopal T.: SimTandem: Similarity Search in Tandem Mass Spectra, in Lecture Notes in Computer Science, Vol. 2012, Num. 7404, ISSN: 0302-9743, pp. 242-243, 2012
  • Novák J., Hoksza D., Lokoč J., Skopal T.: On Optimizing the Non-metric Similarity Search in Tandem Mass Spectra by Clustering, in Lecture Notes in Computer Science, Vol. 2012, Num. 7292, ISSN: 0302-9743, pp. 189-200, 2012
  • Novák J., Skopal T., Hoksza D., Lokoč J.: Non-metric Similarity Search of Tandem Mass Spectra Including Posttranslational Modifications, in Journal of Discrete Algorithms, Vol. 2012, Num. 13, ISSN: 1570-8667, pp. 19-31, 2012 - On-line verze
  • Skopal T., Bartoš T.: Algorithmic exploration of axiom spaces for efficient similarity search at large scale, in Lecture Notes in Computer Science, Vol. 7404, Num. 2012, ISSN: 0302-9743, pp. 40-53, 2012
  • Skopal T., Lokoč J., Bustos B.: D-cache: Universal Distance Cache for Metric Access Methods, in IEEE Transactions on Knowledge and Data Engineering, Vol. 24, Num. 5, ISSN: 1041-4347, pp. 868-881, 2012

2011

Refereed (journals/proceedings) (16)

  • Bartoš T., Eckhardt A., Skopal T.: Fuzzy approach to non-metric similarity indexing, in Fourth International Conference on Similarity Search and Applications 2011, Lipari, Italy, ACM, ISBN: 978-1-4503-0795-6, pp. 115-116, 2011
  • Beecks C., Lokoč J., Seidl T., Skopal T.: Indexing the Signature Quadratic Form Distance for Efficient Content-Based Multimedia Retrieval, in Proceedings of the 1st ACM International Conference on Multimedia Retrieval, Trento, Italy, ACM, ISBN: 978-1-4503-0336-1, pp. 1-8, 2011
  • Beecks C., Skopal T., Schoeffmann K., Seidl T.: Towards Large-Scale Multimedia Exploration, accepted for publication in VLDB proceedings, Seattle, USA, VLDB Endownment, pp. 1-3, 2011
  • Brocke J., Simons A., Skopal T., Stein A., Stieglitz S., Suomi R., Vossen G., Winter R., Wrycza S., Becker J., Braccini A., Butleris R., Hofreiter B., Kapocius K., Marco M., Schmidt G., Seidel S.: Current and Future Issues in BPM Research: A European Perspective from the ERCIS Meeting 2010, in Communications of the Association for Information Systems, Vol. 28, Num. 1, ISSN: 1529-3181, pp. 1-15, 2011
  • Bustos B., Skopal T.: Nonmetric Similarity Search Problems in Very Large Collections, in ICDE 2011, Hannover, Germany, IEEE, ISBN: 978-1-4244-8958-9, ISSN: 1084-4627, pp. 1362-1365, 2011
  • Dohnal V., Skopal T.: Special Issue: Selected Papers from the 2nd International Workshop on Similarity Search and Applications (SISAP 2009) Preface, in Information Systems, Vol. 36, Num. 4, ISSN: 0306-4379, pp. 707-707, 2011
  • Galgonek J., Hoksza D., Skopal T.: SProt: sphere-based protein structure similarity algorithm, in Proteome Science, Vol. 9, Num. Suppl. 1, ISSN: 1477-5956, pp. nestránkováno, 2011
  • [Core A conference]Kruliš M., Lokoč J., Beecks C., Skopal T., Seidl T.: Processing the Signature Quadratic Form Distance on Many-Core GPU Architectures, in Compilation Proceedings of CIKM 2011 and the co-located Workshops, Glasgow, ACM, ISBN: 978-1-4503-0717-8, pp. 2373-2376, 2011
  • Lokoč J., Beecks C., Seidl T., Skopal T.: Parameterized Earth Mover&apos;s Distance for Efficient Metric Space Indexing, in Fourth International Conference on Similarity Search and Applications 2011, Lipari, Italy, ACM, ISBN: 978-1-4503-0795-6, pp. 121-122, 2011
  • Lokoč J., Hetland M., Skopal T., Beecks C.: Ptolemaic Indexing of the Signature Quadratic Form Distance, in Fourth International Conference on Similarity Search and Applications 2011, Lipari, Italy, ACM, ISBN: 978-1-4503-0795-6, pp. 9-16, 2011
  • Moško J., Lokoč J., Skopal T.: Clustered Pivot Tables for I/O-optimized Similarity Search, in Fourth International Conference on Similarity Search and Applications 2011, Lipari, Italy, ACM, ISBN: 978-1-4503-0795-6, pp. 17-24, 2011
  • Novák J., Skopal T., Hoksza D., Lokoč J., Galgonek J.: Protein Sequences Identification using NM-tree, in Fourth International Conference on Similarity Search and Applications 2011, Lipari, Italy, ACM, ISBN: 978-1-4503-0795-6, pp. 125-126, 2011 - On-line verze
  • Pokorný J., Novotný O., Maryška M., Vojtáš P., Skopal T., Nečaský M., Matoušek K., Kubalík J., Šíma J., Žák S., Víta M.: SoSIReČR -sociální sít informatiků v regionech ČR, in Systémová integrace, Vol. 18, Num. 2, ISSN: 1210-9479, pp. 259-269, 2011
  • Pokorný J., Vojtáš P., Nečaský M., Skopal T., Matoušek K., Kubalík J., Novotný O., Maryška M.: SoSIReČR - IT Professional Social Network, in Proceedings of the 2011 International Conference on Computational Aspects of Social Networks (CASoN)., Salamanca, IEEE, ISBN: 978-1-4577-1132-9, pp. 108-113, 2011
  • Skopal T., Bartoš T., Lokoč J.: On (not) indexing quadratic form distance by metric access methods, in Proceedings of the 14th International Conference on Extending Database Technology, Hannover, Germany, ACM, ISBN: 978-1-4503-0528-0, pp. 249-258, 2011
  • Skopal T., Bustos B.: On Nonmetric Similarity Search Problems in Complex Domains, in ACM Computing Surveys, Vol. 43, Num. 4, ISSN: 0360-0300, pp. 1-50, 2011

2010

Refereed (journals/proceedings) (5)

  • Benjamin B., Skopal T.: Beyond the Metric Space Model, in SIGSPATIAL Special, Vol. 2, Num. 2, ISSN: 1946-7729, pp. 20-23, 2010 - WWW
  • Lokoč J., Skopal T.: On Applications of Parameterized Hyperplane Partitioning, in Third International Conference on Similarity Search and Applications, Istanbul, Turkey, ACM, ISBN: 978-1-4503-0420-7, pp. 131-132, 2010 - WWW
  • Novák J., Skopal T., Hoksza D., Lokoč J.: Improving the Similarity Search of Tandem Mass Spectra using Metric Access Methods, in Third International Conference on Similarity Search and Applications, Istanbul, Turkey, ACM, ISBN: 978-1-4503-0420-7, pp. 85-92, 2010 - On-line PDF verze
  • Skopal T.: Where are you heading, metric access methods? A provocative survey, in Third International Conference on Similarity Search and Applications, Istanbul, Turkey, ACM, ISBN: 978-1-4503-0420-7, pp. 13-21, 2010 - WWW
  • Skopal T., Lokoč J.: Answering Metric Skyline Queries by PM-tree, in Proceedings of the Dateso 2010 Annual International Workshop on DAtabases, TExts, Specifications and Objects, Stedronin-Plazy, Czech Republic, MATFYZPRESS, ISBN: 978-80-7378-116-3, ISSN: 1613-0073, pp. 22-37, 2010

2009

Refereed (journals/proceedings) (4)

  • Danko O., Skopal T.: Elliptic Indexing of Multidimensional Databases, in 20th Australian Database Conference, Wellington, New Zealand, Australian Computer Society, CRPIT, ISBN: 978-1-920682-73-6, ISSN: 1445-1336, pp. 1-8, January 2009
  • Eckhardt A., Skopal T., Vojtáš P.: On fuzzy vs. metric similarity search in complex databases, in FQAS 2009 - Eighth International Conference Flexible Query Answering Systems 2009, Springer, ISBN: 978-3-642-04956-9, pp. 64-75, October 2009
  • Skopal T., Bustos B.: On Index-free Similarity Search in Metric Spaces, in DEXA 2009, ISBN: 978-3-642-03572-2, ISSN: 0302-9743, pp. 516-531, 2009
  • Skopal T., Dohnal V., Batko M., Zezula P.: Distinct Nearest Neighbors Queries for Similarity Search in Very Large Multimedia Databases, in ACM WIDM 2009, ISBN: 978-1-60558-808-7, pp. 1-4, 2009

Technical reports (1)

  • Skopal T., Lokoč J.: Efficient Metric Skyline Processing using the PM-tree, technical report no. 2009/1, MFF UK, 10 pages, 2009

2008

Refereed (journals/proceedings) (4)

  • Hoksza D., Skopal T.: Native Multidimensional Indexing in Relational Databases, in COMAD 2008, Bombay, India, Computer Society of India, ACM SIGMOD online, ISBN: 978-81-8424-370-3, pp. 251-261, December 2008
  • Lokoč J., Skopal T.: On Reinsertions in M-tree, in 2008 IEEE 24th international conference on data engineering workshop, vols 1 and 2, ISBN: 978-1-4244-2162-6, pp. 570-577, 2008
  • Lokoč J., Skopal T.: On Reinsertions in Mtree, in SISAP 2008: First international workshop on similarity search and applications, Cancun, Mexico, IEEE, ISBN: 0-7695-3101-6, pp. 121-128, April 2008
  • Skopal T., Lokoč J.: NM-tree: Flexible Approximate Similarity Search in Metric and Non-metric Spaces, in 19th International Conference on Database and Expert Systems Applications, ISBN: 978-3-540-85653-5, ISSN: 0302-9743, pp. 312-325, 2008

2007

Refereed (journals/proceedings) (5)

  • Hoksza D., Skopal T.: Index-based approach to similarity search in protein and nucleotide databases, in DATESO 2007, Desna, Czech Republic, Matfyz Press, Praha, ISBN: 978-80-7378-002-9, ISSN: 1613-0073, pp. 67-80, April 2007
  • Klíma J., Skopal T.: Shape Extraction Framework for Similarity Search in Image Databases, in DATESO 2007, Desna, Czech Republic, Matfyz Press, Praha, ISBN: 978-80-7378-002-9, ISSN: 1613-0073, pp. 89-102, April 2007
  • Skopal T.: Unified Framework for Fast Exact and Approximate Search in Dissimilarity Spaces, in ACM Transactions on Database Systems, Vol. 32, Num. 4, ISSN: 0362-5915, pp. 1-47, 2007
  • Skopal T., Hoksza D.: Improving the Performance of M-tree Family by Nearest-Neighbor Graphs, in 11th East-European Conference on Advances in Databases and Information Systems ADBIS 2007, Springer, ISBN: 978-3-540-75184-7, ISSN: 0302-9743, pp. 172-188, 2007
  • Skopal T., Hoksza D., Pokorný J.: Construction of Tree-based Indexes for Level-Contiguous Buffering Support, in 13th International Conference on Database Systems for Advance Applications, New Delhi, India, Springer, ISBN: 978-3-540-78567-5, ISSN: 0302-9743, pp. 361-373, March 2007

2006

Refereed (journals/proceedings) (4)

  • Bustos B., Skopal T.: Dynamic Similarity Search in Multi-Metric Spaces, in 8th ACM international workshop on Multimedia information retrieval (a part of ACM Multimedia conference), Santa Barbara, CA, USA, ACM Press, ISBN: 1-59593-495-2, pp. 137-146, 2006
  • Skopal T.: On Fast Non-Metric Similarity Search by Metric Access Methods, in 10. International Conference on Extending Database Technology (EDBT), Springer, ISBN: 978-3-540-32960-2, ISSN: 0302-9743, pp. 718-736, 2006
  • Skopal T., Krátký M., Pokorný J., Snášel V.: A New Range Query Algorithm for Universal B-trees, in Information Systems, Vol. 31, Num. 6, ISSN: 0306-4379, pp. 489-511, 2006
  • Skopal T., Snášel V.: An Application of LSI and M-tree in Image Retrieval, in GESTS International Transaction on Computer Science and Engineering, Vol. 34, Num. 1, ISSN: 1738-6438, pp. 212-223, 2006

2005

Refereed (journals/proceedings) (3)

  • Skopal T., Kolovrat M., Snášel V.: Využití LSI a M-stromu při indexování a vyhledávání obrázků, in ZNALOSTI 2005, ISBN: 80-248-0755-6, pp. 84-95, 2005
  • Skopal T., Moravec P.: Modified LSI Model for Efficient Search by Metric Access Methods, in ECIR 2005, ISBN: 978-3-540-25295-5, pp. 245-259, 2005
  • Skopal T., Pokorný J., Snášel V.: Nearest Neighbours Search using the PM-tree, in DASFAA 2005, ISBN: 978-3-540-25334-1, pp. 803-815, 2005

2004

Refereed (journals/proceedings) (6)

  • Krátký M., Pokorný J., Skopal T., Snášel V.: Implementace os XPath ve vícerozměrném přístupu pro indexování XML dat, in Znalosti, FEI VŠB-TU, ISBN: 8024804565, pp. 338-349, 2004
  • Krátký M., Skopal T., Snášel V.: Multidimensional Term Indexing for Efficient Processing of Complex Queries, in KYBERNETIKA, Vol. 40, Num. 3, ISSN: 0023-5954, pp. 381-396, 2004
  • Skopal T.: Pivoting M-tree: A Metric Access Method for Efficient Similarity Search, in DATESO 2004, ISBN: 80-248-0457-3 , pp. 21-31, April 2004
  • Skopal T., Krátký M., Snášel V.: Metrické a semi-metrické indexování vektorových modelů pro dokumentografické informační systémy, in Znalosti 2004, vydavatelství UP, ISBN: 80-248-0456-5, pp. 154-165, 2004
  • Skopal T., Moravec P., Pokorný J., Snášel V.: Metric Indexing for the Vector Model in Text Retrieval, in SPIRE, Springer-Verlag, ISBN: 3-540-23210-9, pp. 183-195, 2004
  • Skopal T., Pokorný J., Snášel V.: PM-tree: Pivoting Metric Tree for Similarity Search in Multimedia Databases, in ADBIS, Computer and Automation Research Institute Hungarian Academy of Science, ISBN: 963 311 358 X, pp. 99-114, 2004

2003

Refereed (journals/proceedings) (2)

  • Pokorný J., Skopal T., Krátký M., Moravec P.: An Efficient Implementation of the Vector Model in Information Retrieval., in Digital Libraries: Advanced Methods and Technologies, Digital Collections., Saint-Petersburg, State University Published Press, ISBN: 5-94158-056-8, pp. 170-179, 2003
  • Pokorný J., Skopal T., Krátký M., Snášel V.: Revisiting M-tree Building Principles., in Proc. of ADBIS 2003, Springer Verlag, ISBN: 3-54-020047-9, pp. 148-162, 2003

2002

Refereed (journals/proceedings) (2)

  • Pokorný J., Krátký M., Skopal T., Snášel V.: The Geometric Framework for Exact and Similarity Querying XML data, in EurAsia-ICT 2002:Information and Communication Technology, Springer, pp. 35-46, 2002
  • Pokorný J., Snášel V., Krátký M., Skopal T.: Indexing XML data with UB-trees, in Proc. of the 6th East European Conf. on Advances in Databases and Information Systems, Slovak University of Technology, ISBN: 80-227-1744-4, pp. 155-164, 2002

Software

IVP Framework, PGRTree

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