Odjel za obradu signala

Odjel za obradu signala uključuje znanstvena područja poput teorije signala i sustava, teorije i primjene kodiranja, uporabe filtara, prijenosa signala, estimacije, detekcije, analize, prepoznavanja, sinteze te reprodukcije signala digitalnim ili analognim uređajima i tehnikama. Pojam signala uključuje audio i video signale, govor, slike, komunikacije, signal sonara, radara kao i medicinske, glazbene i druge signale.

Vodstvo odjela
Mandat do 31. 12. 2025.
Tomislav Petković
predsjednik
Stjepan Begušić
dopredsjednik

Predavanje "Model-based subsampling: Theory and Applications"

U organizaciji Odjela za obradu signala, u okviru zavodskog seminara ZESOI u srijedu 10. lipnja u 10 sati u zavodskoj knjižnici ZESOI bit će održano predavanje pod naslovom:

    Model-based subsampling: Theory and Applications

Predavač je dr. Andras Hajdu, Faculty of Informatics, University of Debrecen, Hungary, koji je u posjeti Zavodu u okviru CEEPUS projekta. Predvidivo trajanje predavanja je do 45 minuta. Sažetak predavanja i biografija predavača su u nastavku obavijesti.
 

Abstract:
We investigate object simplification methods based on Centroidal Voronoi
Tesselation (CVT) that share the possibility of great speed-ups in various
scenarios. We propose Constrained CVT to sample points from the
object boundary and the Region-based CVT to be able to subsample
lower dimensional objects, as well. Moreover we introduce custom weight
functions based on object properties. Thus, we can be more specific on
what are the important parts of the object to be subsampled.
We also present several applications corresponding to the
theoretical achivements. The advantages of applying the subsampling strategies
are presented for registration, human detection, and the segmentation of
the retinal vascular system, respectively. Quantitative results are shown
to check the deterioration of the accuracy with the level of subsampling,
and the computational gain. We also make comparisons with other naive
(e.g. random) subsampling methods.

 

Curriculum Vitae
Personal details
Name:            Dr. András Hajdu
Born:               February 6, 1973, Karcag, Hungary
Citizenship:     Hungarian
Interests:        Discrete Mathematics, Digital Image Processing
Studies
2003.               PhD. with „summa cum laude” in Mathematics and Computer Sciences, University of Debrecen, Debrecen, Hungary.
1996.               Master of Science in Mathematics, Teacher of Mathematics, English-Hungarian Special Translator, Lajos Kossuth University, Debrecen, Hungary.
Languages
English (advanced level), Russian (basic level)
Scientific appointments
2005-2006.      Postdoctoral Researcher, Aristotle University of Thessaloniki, Thessaloniki, Greece.
2004-               Assistant Professor at the Dept. of Information Technology, Faculty of Infomatics, University of Debrecen, Debrecen, Hungary.
2001-2004.      Assistant Lecturer at the Dept. of Information Technology, Institute of Infomatics, University of Debrecen, Debrecen, Hungary.
2000-2001.      Predoctoral fellowship at the Dept. of Information Technology, Institute of Infomatics, University of Debrecen, Debrecen, Hungary.
1997-1999.      Full time PhD student at the Institute of Mathematics and Infomatics, University of Debrecen, Hungary.
1992-96.          Full time student at the Lajos Kossuth University, Debrecen, Hungary.
Scholarships and prizes
2008-2011.      „János Bolyai” research scholarship of the Hungarian Academy of Sciences.
2004.               „Gyula Farkas” prize of the János Bolyai Mathematical Society, Hungary.
2002-2003.      „Pro Regione” scholarship, University of Debrecen, Debrecen, Hungary.
1997.               „Uiversitas” scholarship, Lajos Kossuth University, Debrecen, Hungary.
Research projects
2009-2011.      TECH08-2 grant of the Hungarian National Office for Research and Technology (NKTH), DRSCREEN - Developing a computer-based image processing system for diabetic retinopathy screening, role: project leader.
2004-2006.      FP6-004218, SHARE: Mobile Support for Rescue Forces, Integrating Multiple Modes of Interaction, EU FP6 Information Society Technologies, role: scientific manager, AUTH leader: Ioannis Pitas.
2001-2004.      IKTA-4 6/2001 grant of Hungarian Ministry of Education: MEDIP – Platform independent sofware system for medical image processing, role: participant.
2003-2006.      OTKA F043090 grant of the Hungarian National Foundation for Scientific Research: Discrete methods in digital image processing, role: participant.
2000-2003.      OTKA T032361 grant of the Hungarian National Foundation for Scientific Research: Mathematical modelling of economic and informatic systems, role: participant.
Memberships
2009-               Hungarian Association for Image Analysis and Pattern Recognition, member of steering committee.
2007-2008       Hungarian Association for Image Analysis and Pattern Recognition, secretary.
2003-               Hungarian Academy of Sciences, public member.
2002-               Hungarian Association for Image Analysis and Pattern Recognition, member.
Refereeing
Discrete Applied Mathematics (Elsevier)
Discrete Mathematics (Elsevier)
IEEE Transactions on Image Processing (IEEE)
IEEE Transactions on Pattern Analysis and Machine Intelligence (IEEE)
Pattern Recognition Letters (Elsevier)
Signal Processing (Elsevier)
Teaching Mathematics and Computer Science (University of Debrecen, Hungary)
ISSPA 2005, 8th International Symposium on Signal Processing and its Applications, Sydney, Australia
ISSPA 2007, 9th International Symposium on Signal Processing and its Applications, Sharjah, United Arab Emirates
ICSPC 2007, IEEE International Conference on Signal Processing and Communications, Dubai, United Arab Emirates
Teaching
Seminars on Theoretical Informatics
Lectures and seminars on Digital Image Processing
Supervising Thesis Writing
Supervising TDK-Thesis Writing
Supervising Summer School Students
Conferences
2007.   Sampling Theory and Applications, SampTA07, Thessaloniki, Greece, Invited Lecture.
2007.  Fourth Hungarian Conference on Computer Graphics and Geometry, Budapest, Hungary, Chairman.
2007.   6th Conference of Hungarian Association for Image Processing and Pattern Recognition, Debrecen, Hungary, Editor/Organizer.
2003.   Summer School on Image Processing 2003, Timisoara, Romania, Invited Lecture.
2001.   Summer School on Image Processing 2001, Szeged, Hungary, Invited Lecture.
1998.  Summer School on Image Processing'98, Debrecen, Hungary, Organizer.
 

 

 

 

Autor: Davor Petrinović
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