Research interest:

• Discrete tomography
• reconstruction of discrete sets from their projections
• discrete tomography with geometrical priors
• reconstruction (meta)heuristics
• applications of learning methods (decision trees, neural networks) in discrete tomography
• projection selection algorithms in binary tomography

Scientific talks:

• CSCS 2002 - 3^rd Conference of PhD Students in Computer Science, Szeged, Hungary, July 1-4, 2002
• DGCI 2003 - 11^th International Conference on Discrete Geometry for Computer Imagery, Naples, Italy, November 19-21, 2003
• CSCS 2004 - 4^th Conference of PhD Students in Computer Science, Szeged, Hungary, July 1-4, 2004
• DGCI 2005 - 12^th International Conference on Discrete Geometry for Computer Imagery, Poitiers, France, April 13-15, 2005
• Workshop on Discrete Tomography and Its Applications - New York City, USA, June 13-15, 2005
• CSCS 2006 - 5^th Conference of PhD Students in Computer Science, Szeged, Hungary, June 27-30, 2006
• SSIP 2006 - 14^th Summer School on Image Processing, Szeged, Hungary, June 29 - July 8, 2006
• DGCI 2006 - 13^th International Conference on Discrete Geometry for Computer Imagery, Szeged, Hungary, October 25-27, 2006
• KÉPAF 2007 - 6^th Conference of the Hungarian Association for Image Processing and Pattern Recognition, Debrecen, Hungary, January 25-27, 2007
• SCIA 2007 - 15^th Scandinavian Conference on Image Analysis, Aalborg, Denmark, June 10-14, 2007
• SSIP 2007 - 15^th Summer School on Image Processing, Szeged, Hungary, July 6-15, 2007
• ISPA 2007 - 5^th International Symposium on Image and Signal Processing and Analysis, Istanbul, Turkey, September 27-29, 2007
• IWCIA 2008 - 12^th International Workshop on Combinatorial Image Analysis, Buffalo, USA, April 7-9, 2008
• SSIP 2008 - 16^th Summer School on Image Processing, Vienna, Austria, July 7-16, 2008
• ACIVS 2008 - 10^th International Conference on Advanced Concepts for Intelligent Vision Systems, Juan-les-Pins, France, October 20-24, 2008
• ISVC 2008 - 4^th International Symposium on Visual Computing, Las Vegas, USA, December 1-3, 2008
• KÉPAF 2009 - 7^th Conference of the Hungarian Association for Image Processing and Pattern Recognition, Budapest, Hungary, 2009. jan. 28-30.
• SSIP 2009 - 17^th Summer School on Image Processing, Debrecen, Hungary, July 2-11, 2009
• AIP 2009 - 5^th Conference on Applied Inverse Problems, Vienna, Austria, July 20-24, 2009
• IWCIA 2009 - 13^th International Workshop on Combinatorial Image Analysis, Playa del Carmen, Mexico, November 24-27, 2009
• Meeting on Discrete and Geometric Tomography and Applications - Milan, Italy, April 22-23, 2010
• CompIMAGE 2010 - 2^nd International Symposium on Computational Modeling of Objects Represented in Images, Buffalo, USA, May 5-7, 2010
• SSIP 2010 - 18^th Summer School on Image Processing, Cluj-Napoca, Romania, July 8-17, 2010
• WADGMM 2010 - Workshop on Applications of Discrete Geometry and Mathematical Morphology, Istanbul, Turkey, August 22, 2010
• ISVC 2010 - 6^th International Symposium on Visual Computing, Las Vegas, USA, November 29 - December 1, 2010
• ACIVS 2010 - 12^th International Conference on Advanced Concepts for Intelligent Vision Systems, Sydney, Australia, December 13-16, 2010
• SPPRA 2012 - 9^th IASTED International Conference on Signal Processing, Pattern Recognition and Applications, Crete, Greece, June 18-20, 2012
• ICIAR 2012 - 9^th International Conference on Image Analysis and Recognition, Aveiro, Portugal, June 25-27, 2012
• SSIP 2012 - 20^th Summer School on Image Processing, Vienna, Austria, July 4-13, 2012

Further conference attendance:

• KÉPAF 2011 - 8^th Conference of the Hungarian Association for Image Processing and Pattern Recognition, Szeged, Hungary, January 25-28, 2011
• CompIMAGE 2012 - 3^rd International Symposium on Computational Modeling of Objects Represented in Images, Rome, Italy, September 5-7, 2012
• KÉPAF 2013 - 9^th Conference of the Hungarian Association for Image Processing and Pattern Recognition, Bakonybél, Hungary, January 29 - February 1, 2013
• DGCI 2013 - 17^th International Conference on Discrete Geometry for Computer Imagery, Sevilla, Spain, March 20-22, 2013

Awards, grants:

• Best Talk of the Session Award, CSCS 2002
• Excellent Talk Award, CSCS 2004
• Best Talk of the Session Award, CSCS 2006
• János Bolyai Research Scholarship of the Hungarian Academy of Sciences, 2009-2012
• János Kemény Prize of the John von Neumann Computer Society, 2009

Foreign activities:

• CEEPUS Scholarship: System Software Group, Institute of Informatics, Johannes Kepler Universität, Linz, Austria (2000, 4 months)
• Student work: SIEMENS ICN EN S KGA, München, Germany (2001, 1 month)
• CEEPUS Scholarship: Inst. für Maschinelles Sehen und Darstellen, Technische Universität, Graz, Austria (2008, 1 month)
• CEEPUS Scholarship: Inst. für Maschinelles Sehen und Darstellen, Technische Universität, Graz, Austria (2009, 1 month)
• CEEPUS Scholarship: Faculty of Electronics, Telecommunications and Information Technology, Technical University of Cluj-Napoca, Romania (2010, 1 month)
• Visiting researcher: ASTRA Group, Vision Lab, University of Antwerp, Belgium (2011, 2x1 months)
• CEEPUS Scholarship: Department of Radiology, Medical University of Vienna, Austria (2012, 2 weeks)

Membership:

• NJSZT - John von Neumann Computer Society (since 2005)
• KÉPAF - Hungarian Association for Image Analysis and Pattern Recongnition (since 2005)
• IAPR - International Association for Pattern Recognition (since 2005)
• IEEE Signal Processing Society (2008-2010)
• HAS - Public Body of the Hungarian Academy of Sciences (Section of Engineering Sciences, Committee of Informatics) (since 2009)

Projects:

• OTKA T048476 - New Directions in Discrete Tomography and Its Applications in Neutron Radiography, Member (2005-2008) (finished with excellent degree)
• BO/271/09 - Advanced Methods for Discrete Tomography with Priors and Applications, Principal Investigator (2009-2012) (finished with outstanding degree)
• TÁMOP-4.2.2/08/1/2008-0008 - Sensor Network Based Data Collection and Information Processing, Subproject-Leader (2009-2011)
• TÁMOP-4.2.1/B-09/1/KONV-2010-0005 - Establishment of Center of Excellence of University of Szeged, Member (2010-2012)
• OTKA PD100950 - Advanced Methods for Discrete Tomography with Priors and Applications, Principal Investigator (2012-2014)
• COST MP1207 - Enhanced X-ray Tomographic Reconstruction: Experiment, Modeling, and Algorithms, Management Committee Member (2013-2016)

Further activities

• Acta Cybernetica, reviewer
• Acta Informatica, reviewer
• Computational Optimization and Algorithms, reviewer
• Discrete Applied Mathematics, reviewer
• Fundamenta Informaticae, reviewer
• Graphical Models, reviewer
• IEEE Transactions on Medical Imaging, reviewer
• International Journal of Computer Mathematics, reviewer
• Journal of Computational and Applied Mathematics, reviewer
• Journal of Mathematical Modelling and Algorithms, reviwer
• Lecture Notes in Computer Science, reviewer
• Pure Mathematics and Applications, reviewer
• SIAM Journal of Discrete Mathematics, reviewer
• Theoretical Computer Science, reviewer
• IWCIA 2009, member of program committee
• CompIMAGE 2010, session chair
• CSCS 2010, session chair
• KÉPAF 2011, member of program committee, session chair
• IWCIA 2012, member of program committee
• SPPRA 2012, session chair
• KÉPAF 2013, member of program committee
• DGCI 2013, member of reviewing committee

Scientific publications:

Download my selected publications

Download the list of my independent citations

Download my PhD dissertation "Binary Tomography Using Geometrical Priors: Uniqueness and Reconstruction Results"

Book chapter:

[1] P. Balázs: Decomposition algorithms for reconstructing discrete sets with disjoint components, In G.T. Herman, A. Kuba (Eds.), Advances in Discrete Tomography and Its Applications, Birkhäuser, Boston, pp. 153-173, 2007.

Journal articles:

[1] P. Balázs, E. Balogh, A. Kuba: Reconstruction of 8-connected but not 4-connected hv-convex discrete sets, Discrete Applied Mathematics (Elsevier) 147 149-168 (2005), IF: 0.585

[2] P. Balázs: A decomposition technique for reconstructing discrete sets from four projections, Image and Vision Computing (Elsevier) 25:10 1609-1619 (2007), IF: 1.027

[3] P. Balázs: On the ambiguity of reconstructing hv-convex binary matrices with decomposable configurations, Acta Cybernetica 18(3) 367-377 (2008)

[4] P. Balázs: A framework for generating some discrete sets with disjoint components by using uniform distributions, Theoretical Computer Science (Elsevier) 406 15-23 (2008), IF: 0.806

[5] P. Balázs: Discrete tomographic reconstruction of binary images with disjoint components using shape information, International Journal of Shape Modeling (World Scientific) 14:2 189-207 (2008)

[6] P. Balázs: A benchmark set for the reconstruction of hv-convex discrete sets, Discrete Applied Mathematics (Elsevier) 157 3447-3456 (2009), IF: 0.816

[7] M. Gara, T.S. Tasi, P. Balázs: Learning connectedness and convexity of binary images from their projections, Pure Mathematics and Applications 20:1-2 27-48 (2009)

[8] L. Varga, P. Balázs, A. Nagy: Projection selection dependency in binary tomography, Acta Cybernetica 20(1) 167-187 (2011)

[9] L. Varga, P. Balázs, A. Nagy: Direction-dependency of binary tomographic reconstruction algorithms, Graphical Models (Elsevier) 73 365-375 (2011), IF: 1.000

[10] K.J. Batenburg, W.J. Palenstijn, P. Balázs, J. Sijbers: Dynamic angle selection in binary tomography, Computer Vision and Image Understanding (Elsevier) 117(4) 306-318 (2013), IF: 1.340*

[11] N. Hantos, P. Balázs: The reconstruction of polyominoes from horizontal and vertical projections and morphological skeleton is NP-complete, Fundamenta Informaticae, accepted, IF: 0.365*

[12] P. Balázs: Complexity results for reconstructing binary images with disjoint components from horizontal and vertical projections, Discrete Applied Mathematics, accepted, IF: 0.795*

[13] Z. Ozsvár, P. Balázs: An empirical study of reconstructing hv-convex binary matrices from horizontal and vertical projections, Acta Cybernetica, accepted

Selected conference papers:

[1] P. Balázs, E. Balogh, A. Kuba: A fast algorithm for reconstructing hv-convex 8-connected but not 4-connected discrete sets, 11^th International Conference on Discrete Geometry for Computer Imagery, Naples, Italy, November 2003, Proceedings, Lecture Notes in Computer Science (Springer) 2886 388-397 (2003)

[2] P. Balázs: Reconstruction of decomposable discrete sets from four projections, 12^th International Conference on Discrete Geometry for Computer Imagery, Poitiers, France, April 2005, Proceedings, Lecture Notes in Computer Science (Springer) 3429 104-114 (2005)

[3] P. Balázs: Reconstruction of discrete sets from four projections: strong decomposability, Workshop on Discrete Tomography and Its Applications, New York City, USA, June 2005, Proceedings, Electronic Notes in Discrete Mathematics (Elsevier) 20 329-345 (2005)

[4] P. Balázs: The number of line-convex directed polyominoes having the same orthogonal projections, 13^th International Conference on Discrete Geometry for Computer Imagery, Szeged, Hungary, October 2006, Proceedings, Lecture Notes in Computer Science (Springer) 4245 77-85 (2006)

[5] P. Balázs: Generation and empirical investigation of hv-convex discrete sets, 15^th Scandinavian Conference on Image Analysis, Aalborg, Denmark, June 2007, Proceedings, Lecture Notes in Computer Science (Springer) 4522 344-353 (2007)

[6] P. Balázs: Reconstructing some hv-convex binary images from three or four projections, Abstracts of the 5^th International Symposium on Image and Signal Processing and Analysis, Istanbul, Turkey, September 2007 (IEEE) 136-140 (2007)

[7] P. Balázs: On the number of hv-convex discrete sets, 12^th International Workshop on Combinatorial Image Analysis, Buffalo, USA, April 2008, Proceedings, Lecture Notes in Computer Science (Springer) 4958 112-123 (2008)

[8] P. Balázs, M. Gara: Decision trees in binary tomography for supporting the reconstruction of hv-convex connected images, 10^th International Conference on Advanced Concepts for Intelligent Vision Systems 2008, Juan-les-Pins, France, October 2008, Proceedings, Lecture Notes in Computer Science (Springer) 5259 433-443 (2008)

[9] P. Balázs: Reconstruction of binary images with few disjoint components from two projections, 4^th International Symposium on Visual Computing 2008, Las Vegas, USA, December 2008, Proceedings, Lecture Notes in Computer Science (Springer) 5359 1147-1156 (2008)

[10] P. Balázs, M. Gara: An evolutionary approach for object based image reconstruction using learnt priors, 16^th Scandinavian Conference on Image Analysis, Oslo, Norway, June 2009, Proceedings, Lecture Notes in Computer Science (Springer) 5575 520-529 (2009)

[11] P. Balázs: Reconstruction of canonical hv-convex discrete sets from horizontal and vertical projections, 13^th International Workshop on Combinatorial Image Analysis, Playa del Carmen, Mexico, November 2009, Proceedings, Lecture Notes in Computer Science (Springer) 5852 280-288 (2009)

[12] L. Varga, P. Balázs, A. Nagy: Direction-dependency of a binary tomographic reconstruction algorithm, 2^nd International Symposium on Computational Modeling of Objects Represented in Images, Buffalo, USA, May 2010, Proceedings, Lecture Notes in Computer Science (Springer) 6026 242-253 (2010)

[13] N. Hantos, P. Balázs: Image enhancement by median filters in algebraic reconstruction methods: an experimental study, 6^th International Symposium on Visual Computing, Las Vegas, USA, November 2010, Proceedings, Lecture Notes in Computer Science (Springer) 6455 339-348 (2010)

[14] L. Varga, P. Balázs, A. Nagy: Projection selection algorithms for discrete tomography, 12^th International Conference on Advanced Concepts for Intelligent Vision Systems, Sydney, Australia, December 2010, Proceedings, Lecture Notes in Computer Science (Springer) 6474 390-401 (2010)

[15] T.S. Tasi, M. Hegedûs, P. Balázs: Perimeter estimation of some discrete sets from horizontal and vertical projections, 9^th IASTED International Conference on Signal Processing, Pattern Recognition and Applications, Crete, Greece, June 2012, Proceedings, pp. 174-181 (2012)

[16] P. Balázs, K.J. Batenburg: A central reconstruction based strategy for selecting projection angles in binary tomography, 9^th International Conference on Image Analysis and Recognition, Aveiro, Portugal, June 2012, Proceedings, Lecture Notes in Computer Science (Springer) 7325 382-391 (2012)

[17] M. Gara, T.S. Tasi, P. Balázs: Machine learning as a preprocessing phase in discrete tomography, 1^st International Workshop on Applications of Discrete Geometry and Mathematical Morphology, Istanbul, Turkey, August 2010, Revised Selected Papers, Lecture Notes in Computer Science (Springer) 7346 109-124 (2012)

[18] L. Varga, P. Balázs, A. Nagy: An energy minimization reconstruction algorithm for multivalued discrete tomography, 3^rd International Symposium on Computational Modelling of Objects Represented in Images, Rome, Italy, September 2012, Proceedings (Taylor & Francis), pp. 179-185 (2012)

[19] N. Hantos, P. Balázs, K. Palágyi: Binary image reconstruction from two projections and skeletal information, 15^th International Workshop on Combinatorial Image Analysis, Austin, TX, USA, November 2012, Proceedings, Lecture Notes in Computer Science (Springer) 7655 263-273 (2012)

[20] L. Varga. L.G. Nyúl, A. Nagy, P. Balázs: Local uncertainty in binary tomographic reconstruction, 10^th IASTED International Conference on Signal Processing, Pattern Recognition and Applications, Innsbruck, Austria, February 2013, Proceedings, pp. 490-496 (2013)

Further conference papers:

[1] P. Balázs, E. Balogh, A. Kuba: A fast algorithm for reconstructing hv-convex 8-connected but not 4-connected discrete sets, Volume of Extended Abstracts of the 3^rd Conference of PhD Students in Computer Science, Szeged, Hungary, 1-4 July, 2002, pp. 19.

[2] P. Balázs, A. Kuba: Reconstruction of discrete sets from four projections: Decomposable cases, Volume of Extended Abstracts of the 4^th Conference of PhD Students in Computer Science, Szeged, Hungary, 1-4 July, 2004, pp. 22.

[3] P. Balázs: On the ambiguity of reconstructing decomposable hv-convex binary matrices, Volume of Extended Abstracts of the 5^th Conference of PhD Students in Computer Science, Szeged, Hungary, 27-30 June, 2006, pp. 17.

[4] P. Balázs: Uniform generation of hv-convex discrete sets, Abstracts of the 6^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Debrecen, Hungary, 25-27 January, 2007, pp. 63-70.

[5] M. Gara, P. Balázs: Determination of geometric features of binary images from their projections by using decision trees, Volume of Extended Abstracts of the 6^th Conference of PhD Students in Computer Science, Szeged, Hungary, 2-5 July, 2008, pp. 26.

[6] P. Balázs: Reconstruction of binary images with disjoint components from horizontal and vertical projections, Abstracts of the 7^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Budapest, Hungary, 28-30 January, 2009, 8 pages.

[7] M. Gara, P. Balázs: Preprocessing in binary tomography based on decision trees, Abstracts of the 7^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Budapest, Hungary, 28-30 January, 2009, 9 pages (in Hungarian).

[8] P. Balázs: Neutron tomography with prior information, Abstracts of the 5^th Conference on Applied Inverse Problems, Vienna, Austria, 20-24 July, 2009, pp. 38.

[9] M. Gara, P. Balázs: Binary tomographic reconstruction with an object-based evolutionary algorithm, Volume of Extended Abstracts of the 7^th Conference of PhD Students in Computer Science, Szeged, Hungary, 29 June - 2 July, 2010, pp. 31.

[10] N. Hantos, P. Balázs: Median filtering in algebraic reconstruction methods, Volume of Extended Abstracts of the 7^th Conference of PhD Students in Computer Science, Szeged, Hungary, 29 June - 2 July, 2010, pp. 36.

[11] T.S. Tasi, P. Balázs: Obtaining geometrical properties of binary images from two projections using neural networks, Volume of Extended Abstracts of the 7^th Conference of PhD Students in Computer Science, Szeged, Hungary, 29 June - 2 July, 2010, pp. 69.

[12] L. Varga, P. Balázs, A. Nagy: Object Rotation effects on binary tomographic reconstruction, Volume of Extended Abstracts of the 7^th Conference of PhD Students in Computer Science, Szeged, Hungary, 29 June - 2 July, 2010, pp. 76.

[13] P. Balázs, M. Gara, T.S. Tasi: Machine learning for supporting binary tomographic reconstruction, Proceedings of the Workshop on Applications of Discrete Geometry in Mathematical Morphology, Istanbul, Turkey, 22 August, 2010, pp. 101-105.

[14] L. Varga, P. Balázs, A. Nagy: Projection direction dependency in binary tomography, Abstracts of the 8^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Szeged, Hungary, 25-28 January, 2011, pp. 92-105 (in Hungarian)

[15] N. Hantos, P. Balázs: Median filtering in algebraic reconstruction methods, Abstracts of the 8^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Szeged, Hungary, 25-28 January, 2011, pp. 106-116 (in Hungarian)

[16] M. Gara, P. Balázs: Binary tomographic reconstruction with an object-based evolutionary algorithm, Abstracts of the 8^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Szeged, Hungary, 25-28 January, 2011, pp. 117-127 (in Hungarian)

[17] M. Gara, P. Balázs: Artificial intelligence methods in discrete tomography, Volume of Extended Abstracts of the 8^th Conference of PhD Students in Computer Science, Szeged, Hungary, 28-30 June, 2012, pp. 16.

[18] N. Hantos, P. Balázs, K. Palágyi: Binary tomography using two projections and morphological skeleton, Volume of Extended Abstracts of the 8^th Conference of PhD Students in Computer Science, Szeged, Hungary, 28-30 June, 2012, pp. 20.

[19] Z. Ozsvár, P. Balázs: Empirical studies of reconstructing hv-convex binary matrices from horizontal and vertical projections, Volume of Extended Abstracts of the 8^th Conference of PhD Students in Computer Science, Szeged, Hungary, 28-30 June, 2012, pp. 44.

[20] T.S. Tasi, P. Balázs: Extracting geometrical features of discrete images from their projections, Volume of Extended Abstracts of the 8^th Conference of PhD Students in Computer Science, Szeged, Hungary, 28-30 June, 2012, pp. 52.

[21] L. Varga, A. Nagy, P. Balázs: A novel optimization-based reconstruction algorithm for multivalued discrete tomography, Volume of Extended Abstracts of the 8^th Conference of PhD Students in Computer Science, Szeged, Hungary, 28-30 June, 2012, pp. 57.

[22] A. Bogdanov, Sz. Urbán, V. Endrész, K. Burián, P. Balázs, J. Deák, D. Virók: Automatic counting of chlamydial inclusions using a fluorescent DNA chip scanner, Abstracts of the 11^th István Cserháti Memorial Meeting for Young Researchers, Szeged, Hungary, 23-24 November, 2012, pp. 37. (in Hungarian)

[23] L. Varga, P. Balázs, A. Nagy: An optimization-based reconstruction algorithm for multivalued discrete tomography, Program and Abstracts of the 5^th Veszprém Optimization Conference: Advanced Algorithms VOCAL 2012, Veszprém, Hungary, 11-14 December, 2012, pp. 39.

[24] N. Hantos, P. Balázs, K. Palágyi: Solving binary tomography from morphological skeleton via optimization, Program and Abstracts of the 5^th Veszprém Optimization Conference: Advanced Algorithms VOCAL 2012, Veszprém, Hungary, 11-14 December, 2012, pp. 42.

[25] N. Hantos, P. Balázs, K. Palágyi: Reconstruction of binary images from two projections and morphological skeleton, Abstracts of the 9^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Bakonybél, Hungary, 29 January - 1 February, 2013, pp. 182-193. (in Hungarian)

[26] Z. Ozsvár, P. Balázs: A comparison of heuristics for reconstructing hv-convex binary matrices from horizontal and vertical projections, Abstracts of the 9^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Bakonybél, Hungary, 29 January - 1 February, 2013, pp. 168-181.

[27] L. Varga, P. Balázs, A. Nagy: Discrete tomography by automatic weighting of gradient descents, Abstracts of the 9^th Conference of the Hungarian Association of Image Processing and Pattern Recognition, Bakonybél, Hungary, 29 January - 1 February, 2013, pp. 210-223. (in Hungarian)