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Multimedia Technology Group

Multimedia Technology Group is a part of Faculty of Electrical Engineering, Czech Technical University. We perform teaching and research in various fields related to video and audio processing. It includes image processing in astronomy, security, assistive technologies and biology, video and audio quality assessment, hearing modeling, development of digital loudspeakers and other related tasks. Together with our foreign and domestic partners, we participate in international research projects like for instance European Space Agency (ESA) projects DEMON and INTEGRAL, projects BOOTES, MAIA, European scientific program Qualinet and others.

Video and audio processing plays an important role in various fields which often share similar demands on high-tech signal processing solutions. We have an extensive experience in digital signal processing and benefit from this knowledge in the modern, progressive fields where highly demanding image and audio processing applications are required.

Image processing plays an important role in the modern astronomy. We are focused on related imaging tasks, including, but not limited to, nonlinear imaging systems with spatially variant point spread function, image compression for astronomical applications, ultra wide field imaging systems. In the cooperation with Astronomical institute of the Academy of Sciences, we are involved in a project of the European Space Agency (ESA) called INTEGRAL (International Gamma-Ray Astrophysics Laboratory). We further participate in the BOOTES project (the Burst Observer and Optical Transient Exploring System). Within the MAIA project, we study sporadic meteors and less active meteor showers by using a double station video observation.

We are active in the field of applied image photonics. We currently participate in the European Space Agency (ESA) project DEMON (BBT Materials Processing) focused on the optical quality evaluation techniques for calomel (mercurous chloride) single crystals.

Our field of expertise is also audio and video quality assessment. High Quality of Experience (QoE) is one of the most important goals when designing new multimedia systems. In order to understand the impact of various components of the multimedia system on the perceived quality, we use established subjective quality assessment methodologies. We perform research in the field of objective quality assessment measures and perceptual optimization of multimedia signal processing algorithms. In the pursuit for better understanding of the subjective quality, we are working on hearing modeling and studies of psychovisual and psychoacoustic processes.

Image analysis and processing is heavily used also in the field of cellular biology. Unraveling the structure and function of cells is a pertinent objective of innumerable research efforts in life sciences. The investigation of subcellular structures requires images with high resolution beyond the diffraction limit. Final image in super-resolution fluorescence microscopy is a result of a highly demanding image processing effort. Together with our foreign partners, we perform research in the field of structured illumination microscopy (SIM) and super-resolution optical fluctuation imaging (SOFI).

Contact Details

  • Multimedia Technology Group
  • Czech Technical University in Prague
  • Faculty of Electrical Engineering
  • Department of Radioelectronics
  • Technicka 2, 166 27, Prague 6, Czech Republic

Research Activities

  • Imaging systems and image processing in astronomy
  • Image/video and sound quality assessment, QoS, QoE
  • Vision and hearing modeling, study of psychovisual and psychoacoustic processes
  • Image processing in biology
  • Image/video and audio compression and coding
  • Multimedia information processing (audio, image/video)
  • 3D audiovisual systems
  • BCI and man-machine interface applications in multimedia technology
  • Imaging systems and image processing in security
  • Multimedia applications in assistive technologies
  • Measurement and analysis of electro-acoustic and audio systems

Cooperations

  • The Astronomical Institute of the Academy of Sciences of the Czech Republic, Ondřejov (Czech Republic)
  • EPFL – Ecole Polytechnique Fédérale de Lausanne, Lausanne (Switzerland)
  • ESEO – Institute of Science and Technology, (France)
  • L’UNAM – L’Université Nantes Angers Le Mans, Nantes (France)
  • AES – Audio Engineering Society, New York (USA)
  • BUT – Brno University of Technology, Brno (Czech Republic)
  • Institute of Cellular Biology and Pathology, First Faculty of Medicine, Charles University in Prague (Czech Republic)
  • Politecnico di Torino, Torino (Italy)
  • UM – Laboratoire d’Acoustique de l’Université du Maine, Le Mans (France)
  • UNB – University of New Brunswick, Fredericton (Canada)
  • The Czech and Slovak Society for Photonics, Prague (Czech Republic)
  • CAS – Czech Acoustic Society, Prague (Czech Republic)
  • NCTU – National Chiao Tung University, (Taiwan)
  • HU – Hogeschool Utrecht, Utrecht (Netherlands)
  • NTNU – Norwegian University of Science and Technology, Trondheim (Norway)
  • UWB – University of West Bohemia, Pilsen (Czech Republic)
  • FAMU – Film and TV School of Academy of Performing Arts in Prague, Prague (Czech Republic)

List of Grants

2015

  • Bernas, M.: Optimizing of sign language transmission over the television system. SGS15/089/OHK3/1T/13 (2015)
  • Krasula, L.: Optimization of Tone Mapping Operators Parameters for High Dynamic Range Images. SGS15/091/OHK3/1T/13 (2015)

2014

  • Páta, P.: Nonlinear imaging systems with spatially variant point spread function 14–16, GA14-25251S (2014 – 2016)
  • Lukeš, T.: Sciex Fellowship: MitoSOFI – Super-resolution Optical Fluctuation Imaging of Mitochondrial Networks (Project Code 13.183) (2014 – 2015)
  • Lukeš, T.: Super-resolution microscopy imaging of mitochondrial networks 14–15, SGS SGS14/148/OHK3/2T/13 (2014 – 2015)
  • Rund, F.: Psychoacustical measurements, auditory models and their application. 14–16, SGS SGS14/204/OHK3/3T/13 (2014 – 2016)

2013

  • Hudec, R.: Study of Wide Field of View X-Ray Optics 13–15, LH13065 (2013 – 2015)
  • Hudec, R.: Digitalizace astronomických fotografických desek a výzkum kosmických zdrojů v digitalizovaných deskových astronomických archivech 13–15, GC13-39464J (2013 – 2015)
  • Hudec, R.: “Lobster Eye” X-Ray Monitor 13–17, GA13-33324S (2013 – 2017)
  • Klíma, M.: Research and modeling of advanced methods of image quality evaluation 10–14, GAP102/10/1320 (2010 – 2014)
  • Anisimova, E.: Advanced Algorithms for Processing and Analysis of Scientific Image Data 13–15, SGS SGS13/212/OHK3/3T/13 (2013 – 2015)
  • Jindra, T.: Experimental support of quality evaluation for stereoscopic videosequences 13–13, SGS SGS13/082/OHK3/1T/13 (2013)

2012

  • Klíma, M.: 3D Video Transmission in IP-based Networks 12–13, 7AMB12GR014 (2012 – 2013)
  • Klíma, M.: Modeling and verification of methods for Quality of Experience (QoE) assessment in multimedia systems (2012 – 2014)
    12–14, LD12018
  • Páta, P.: GLORIA: GLObal Robotic telescopes Intelligent Array for e-Science 12–14, 7E12074 (2012 – 2014)
  • Dostál, P.: Region-of-Interest importance with regards to the percieved image quality and implementation of an objective image quality metric based on ROI analysis 12–12, SGS SGS12/075/OHK3/1T/13 (2012)

2011

  • Klíma, M.: Quality Evaluation Methods for Calomel Optical Elements 11–14, ESA (2011 – 2014)
  • Páta, P.: GLORIA: GLObal Robotic telescopes Intelligent Array for e-Science 11–14, 283783 (2011 – 2014)
  • Dostál, P.: Content adaptive demosaicing algorithm implementaion 11–11, SGS SGS11/069/OHK3/1T/13
  • Fliegel, K.: Assessment of image quality in stereoscopic systems 11–11, SGS SGS11/070/OHK3/1T/13
  • Fliegel, K.: 11–11, FRV F1a 2495
  • Kekrt, D.: 11–11, FRV G1 1644
  • Vencovský, V.: 11–11, FRV G1 1702
  • Rund, F.: Personal Navigation System using Artificial Audio Signals for Assistive Technology. 2011-13, SGS SGS11/159/OHK3/3T/13

2010

  • Klíma, M.: European Network on Quality of Experience in Multimedia Systems and Services (QUALINET), COST IC 1003/10, 2010, coordinator Prof. Touradj Ebrahimi, EPFL, 17 partners of 13 COST countries
  • Klíma, M.: Development Project – Centre of Assistive Technologies (CAT) – first phase, 2010,100701-K13921
  • Fliegel, K.: Database of special image tests for stereoscopic imaging systems and image processing systems with high dynamic range, 2010, SGS SGS10/079/OHK3/1T/13
  • Blažek, M.: Analysis of spatially and time variable scientifical imaging systems, 2010–12, SGS SGS10/285/OHK3/3T/13
  • Dostál, P.: Implementation, verification and evaluation of selected interpolation algorithms using in security imaging systems, 2010, SGS SGS10/078/OHK3/1T/13
  • Kekrt, D.: The hardware design and implementation of broadband transceiver with iterative synchronized Turbocode,2010, SGS SGS10/204/OHK3/2T/13
  • Rund, F.: Using of the Sound Sources Virtual Positioning Methods for Three-dimensional Orientation of the Visually Impaired, 2010, SGS SGS10/082/OHK3/1T/13
  • Husník, L.: Identification and Suppression of Non Linearities in Electro Acoustic Transducers 10–11, MEB021035
  • Klíma, M.: Research and modeling of advanced methods of image quality evaluation, 2010, GA P102/10/1320
  • Klíma, M.: Laboratory of Multimedia Measurements, 2010, FRV 1936 Aa
  • Klíma, M.: Development Project – MSP, 2010
  • Bernas, M.: Additional television transmission of the animated sign language speaker picture, 2010, SGS SGS10/203/OHK3/2T/13

2009

  • Klíma, M.: Development Project – Laboratory of light, illuminant, projection and imaging technique, 2009, 942521-K13137-RP
  • Páta, P.: Study of sporadic meteors and weak meteor showers using automatic video intensifiers cameras, 2009–13, GA205/09/1302
  • Hudec, R.: Algorithms, Image Processing, and Data Mining in the PARI Plate Archive, 2009–12, ME09027
  • Hudec, R.: International Workshop IBWS 2009, 2009, CTU CTU0917413
  • Hudec, R.: Adaptive X-ray Optics for Generation X Space Mission, 2009–12, ME09028
  • Hudec, R.: Automated Detection and Image Processing of Optical Emission of Celestial Gamma Ray Bursts, 2009–13, GA102/09/0997
  • Vencovský, V.: Objective Quality Assessment of Coded Audio by Means of an Auditory Model, 2009, CTU CTU0909613

2008

  • Klíma, M.: 42nd Annual IEEE International Carnahan Conference on Security Technology 2008 (ICCST 2008), 08–08, CTU CTU0814913
  • Řeřábek, M.: Conference SPIE Optics + Photonics 2008: Processing and Restoration Astronomical Image Data obtained from UWFC Optical Systems, 08–08, CTU CTU0812313
  • Kekrt, D.: An Iterative Statistical Methods Application in the Reconstruction Problem of Pictures Gained from Digital Cameras with CCD (CMOS) Sensor, 08–08, CTU CTU0803313
  • Řeřábek, M.: Create a New Laboratory Tasks for the Course Imaging Photonics, 08–08, FRV 2531 G1
  • Fritsch, L.: Video Compression Algorithm for Camera Security Systems, 08–08, CTU CTU0803213
  • Nováček, J.: Design and Verification of the Wavelet Transform based Wide-Band Audio Coder, 08–08, CTU CTU0807413

2007

  • Klíma, M.: Qualitative Aspects of Audiovisual Information Processing in Multimedia Systems, 05–07, GA102/05/2054
  • Klíma, M.: Multimedia Computer Lab, 07–07, FRV 670Ab
  • Řeřábek, M.: Shift Variant Optical Systems in Imaging Algorithms, 07–07, CTU CTU0707613
  • Švihlík, J.: Bayesian Approach to the Thermally Generated Charge Elimination, 07–07, CTU CTU0713113
  • Tourek, M.: Quality Aspects in Digital and Analog Cinema Technology, 07–07, CTU CTU0707713
  • Novák, A.: Measurement and Analysis of Electro-acoustic Systems with Nonlinearities, 07–07, CTU CTU0707513

2006

  • Klíma, M.: Qualitative Aspects of Audiovisual Information Processing in Multimedia Systems, 05–07, GA102/05/2054
  • Fliegel, K.: A Model Utilizing Artificial Neural Network for Perceptual Image Quality Assessment in Image Compression Algorithms, 06–06, CTU CTU0615713
  • Herrera Martinez, M.: Statistical analysis of subjective tests of audio-coding systems, 06–06, CTU CTU0609813
  • Švihlík, J.: Noise Removing from an Image Data based on Bayesian Statistics, 06–06, CTU CTU0610213
  • Valoušek, P.: Electroacoustic Transducers with Direct D/A Conversion, 06–06, CTU CTU0610313