Position:
- Professor
- Head of the division
- Head of the department (2006 – 2014)
Degrees:
- Professor: 2000, CTU FEE
- Doc. (Associated Professor): 1992, CTU FEE (Acoustooptic Signal Processors)
- Scientific Qualification Degree II.a: 1984,
- CSc. (Ph.D.): 1978, CTU FEE (Trichromatic AO Deflector of Laser Beam)
- Ing. (M.Sc.): 1974, CTU FEE, Communications
Other positions and duties:
- from 2000 Full Professor
- from 1989 Head of the Work Group “Television, Photonics and Biomedical Engineering”
- 1992-96 Deputy Head of Department
- 1992-2000 Associate Professor
- 1989-91 Assistant Professor
- 1984-89 Senior Research Scientist
- 1978-84 Research Scientist
- 1973-78 Researcher
List of Publications
2017
- Krasula, L., Le Callet, P., Fliegel, K, Klíma, M. Quality Assessment of Sharpened Images: Challenges, Methodology, and Objective Metrics, IEEE Transactions on Image Processing, 2017. (accepted for publication)
SID: Sharpened Images Database…
2016
- L. Krasula, K. Fliegel, P. Le Callet, M. Klíma, “On the accuracy of objective image and video quality models: New methodology for performance evaluation”, International Conference on Quality of Multimedia Experience (QoMEX), June 2016.
Source code…
2015
- P. Pata, M. Klima, J. Bednar, P. Janout, C. Barta, R. Hasal, L. Maresi, and S. Grabarnik, “OFT sectorization approach to analysis of optical scattering in mercurous chloride single crystals,” Opt. Express, vol. 23, p. 21509, 2015.
2014
- T. Lukeš, P. Křížek, Z. Švindrych, J. Benda, M. Ovesný, K. Fliegel, M. Klíma, and G. M. Hagen, “Three-dimensional super-resolution structured illumination microscopy with maximum a posteriori probability image estimation,” Optics Express, vol. 22, no. 24, p. 29805, Nov. 2014.
- T. Lukeš, D. Kekrt, K. Fliegel, M. Klíma, ” Binarization of noisy microscopy images through signal reconstruction using iterative detection network ,” International Conference on Image Processing ICIP 2014, 21th IEEE International Conference, October 2014
- T. Lukeš, G. Hagen, P. Křížek, Z. Švindrych, K. Fliegel, and M. Klíma, “Comparison of image reconstruction methods for structured illumination microscopy,” in Proc. SPIE 9129, Biophotonics: Photonic Solutions for Better Health Care IV, 91293J (May 8), 2014, vol. 9129, pp. 1–13.
- D. Kekrt, T. Lukeš, M. Klíma, and K. Fliegel, “2D Iterative MAP Detection: Principles and Applications in Image Restoration,” RADIOENGINEERING, vol. 23, no. 2, pp. 618–631, 2014.
- L. Krasula, K. Fliegel, P. Le Callet, M. Klíma, “Using Full-Reference Image Quality Metrics for Automatic Image Sharpening,” Proc. SPIE 9138, Optics, Photonics, and Digital Technologies for Multimedia Applications III, 913807 (May 15, 2014); doi:10.1117/12.2052275
- L. Krasula, K. Fliegel, P. Le Callet, M. Klíma, “Objective Evaluation of Naturalness, Contrast, and Colorfulness of Tone-Mapped Images,” Proc. SPIE 9217, Applications of Digital Image Processing XXXVII, 92172D (September 23, 2014); doi:10.1117/12.2075270
- S. Vítek, M. Klíma, L. Krasula, “Video compression technique impact on efficiency of person identification in CCTV systems,” Security Technology (ICCST), 2014 International Carnahan Conference on , pp.1-5, 13-16 Oct. 2014
2013
- Vítek, S. – Krasula, L. – Klíma, M. – Hvězda, V. – Herrera Martínez, M.: Influence of HEVC Compression on Event Detection in Security Video Sequences. In The 47th Annual International Carnahan Conference on Security Technology. Piscataway: IEEE, 2013, p. 232-237. ISBN 978-958-8790-65-7.
- Dostál, P. – Krasula, L. – Klíma, M.: Influence of High Level Features of HVS on Performance of FSIM. Radioengineering. 2013, vol. 22, no. 4, p. 1048-1055. ISSN 1210-2512.
- T. Lukeš, K. Fliegel, M. Klíma, “Objective image quality assessment of multiframe super-resolution methods,” Radioelektronika (RADIOELEKTRONIKA), 2013 23rd International Conference, pp.267-272.
- T. Lukeš, K. Fliegel, M. Klíma, “Performance evaluation of image quality metrics with respect to their use for super-resolution enhancement,” Quality of Multimedia Experience (QoMEX), 2013 Fifth International Workshop, pp. 42-43.
2012
- Ibekwe, M. – Vítek, S. – Dostál, P. – Klíma, M.: Modeling and Evaluation of Image Quality in Wireless Surveillance Networks. In Proceedings 46th International Carnahan Conference on Security Technology. Piscataway: IEEE, 2012, p. 345-352. ISSN 1071-6572.ISBN 978-1-4673-4807-2.
- Kekrt, D. – Klíma, M.: 2D Iterative Detection Network Based Image Restoration: Principles, Applications and Performance Analysis. In Image Restoration – Recent Advances and Applications. Rijeka: InTech – Open Access Company (InTech Europe), 2012, p. 315-350. ISBN 978-953-51-0388-2.
- Klíma, M. – Vítek, S.: Imaging Systems in Assistive Technology. In Assistive Technologies. Rijeka: InTech – Open Access Company (InTech Europe), 2012, p. 1-19. ISBN 978-953-51-0348-6.
- Lhotská, L. – Havlík, J. – Klíma, M. – Burša, M. – Huptych, M. – et al.: Assistive Technologies: Project-Based Education. In IFMBE Proceedings: World Congress on Medical Physics and Biomedical Engineering. Heidelberg: Springer, 2012, vol. 39, p. 1687-1690. ISSN 1680-0737.ISBN 978-3-642-29304-7.
- Vítek, S. – Dostál, P. – Klíma, M.: Cost-Effective Automatic Stereoscopic Security Video System 3DSec. In Proceedings 46th International Carnahan Conference on Security Technology. Piscataway: IEEE, 2012, p. 353-358. ISSN 1071-6572.ISBN 978-1-4673-4807-2.
- Hudec, R. – Hudec, L. – Klíma, M.: Ultra Low Dispersion Spectroscopy with Gaia and Astronomical Slitless Surveys. Acta Polytechnica. 2012, vol. 52, no. 1, p. 27-33. ISSN 1210-2709.
- Fliegel, K, Vítek S, Jindra T, Páta P, Klíma M. 2012. Comparison of stereoscopic technologies in various configurations. {Applications of Digital Image Processing XXXV}. :849929-1–849929-9.
- Anisimova, E, Páta P, Fliegel K, Klíma M. 2012. Comparison of the astronomical and multimedia image quality criteria. {Photonics Europe 2012: Optical Engineering, Imaging and Applications}. :843604-1–843604-8.
- Dostál, P. – Krasula, L. – Klíma, M.: HLFSIM: Objective Image Quality Metric Based on ROI Analysis. In Proceedings 46th International Carnahan Conference on Security Technology. Piscataway: IEEE, 2012, p. 367-374. ISSN 1071-6572.ISBN 978-1-4673-4807-2.
- Dostál, P. – Krasula, L. – Klíma, M.: Can state-of-the-art HVS based objective image quality criteria be used for image reconstruction techniques based on ROI analysis?. In Optics, Photonics, and Digital Technologies for Multimedia Applications II. Washington: SPIE – The International Society for Optical Engineering, 2012, p. 1-12. ISSN 0277-786X.ISBN 978-0-8194-9128-2.
- Krasula, L. – Dostál, P. – Klíma, M.: Content Dependent Demosaicing Algorithm Implementation. In Proceedings of 22nd International Conference Radioelektronika 2012. Brno: VUT v Brně, FEKT, Ústav radioelektroniky, 2012, vol. 1, p. 67-70. ISBN 978-80-214-4468-3.
- Krasula, L. – Klíma, M. – Rogard, E. – Jeanblanc, E.: MATLAB-based Applications for Image Processing and Image Quality Assessment Part II: Experimental Results. Radioengineering. 2012, vol. 21, no. 1, p. 154-161. ISSN 1210-2512.
- Kekrt, D. – Zavrtálek, J. – Klíma, M. – Podgorný, R.: Implementation of Different Variants of Table-Based Frequency Synthesizers with Quadrature Output in VHDL. Advances in Electrical and Electronic Engineering [online]. 2012, vol. 10, no. 2, p. 81-88. ISSN 1804-3119.
2011
- Dostál, P. – Klíma, M.: Analysis of Reconstruction Performance of Different Demosaicing Algorithm. In Proceedings of 21st International Conference Radioelektronika 2011. Brno: VUT v Brně, FEKT, Ústav radioelektroniky, 2011, p. 237-240. ISBN 978-1-61284-322-3.
- Dostál, P. – Klíma, M.: Locally Adaptive Demosaicing Technique for Security Images Based upon Region-of-Interest Analysis. In Proceedings 45th International Carnahan Conference on Security Technology. Piscataway: IEEE, 2011, p. 164-173. ISSN 1071-6572.ISBN 978-1-4577-0902-9.
- Ibekwe, M. – Klíma, M. – Souček, P.: The objective image quality criteria and QoE in the security technology. In Proceedings 45th International Carnahan Conference on Security Technology. Piscataway: IEEE, 2011, vol. 1, p. 1-5. ISSN 1071-6572.ISBN 978-1-4577-0902-9.
- Vítek, S. – Klíma, M. – Husník, L. – Špirk, D.: New possibilities for blind people navigation. In 2011 International Conference on Applied Electronics. Plzeň: Západočeská univerzita v Plzni, 2011, p. 405-408. ISSN 1803-7232.ISBN 978-80-7043-987-6.
- Hudec, R. – Hudec, L. – Klíma, M.: Ultra Low-Dispersion Spectroscopy with Gaia and Photographic Objective Prism Surveys. Acta Polytechnica. 2011, vol. 51, no. 2, p. 52-56. ISSN 1210-2709.
- Schindler, J, Páta P, Klíma M, Fliegel K. 2011. Astronomical Image Compression Techniques Based on ACC and KLT Coder. Acta Polytechnica. 51:97–102.
- Fliegel, K, Vítek S, Klíma M, Páta P. 2011. Open source database of images DEIMOS: high dynamic range and stereoscopic content. {Applications of Digital Image Processing XXXIV}. :81351T-1–81351T-10.
- Krasula, L. – Klíma, M. – Rogard, E. – Jeanblanc, E.: MATLAB-Based Applications for Image Processing and Image Quality Assessment – Part I: Software Description. Radioengineering. 2011, vol. 20, no. 4, p. 1009-1015. ISSN 1210-2512.
- Klíma, M. – Fliegel, K. – Páta, P. – Vítek, S. – Blažek, M. – et al.: DEIMOS – an Open Source Image Database. Radioengineering. 2011, vol. 20, no. 4, p. 1016-1023. ISSN 1210-2512.
- Klíma, M, Fliegel K, Páta P, Vítek S, Blażek M, Dostál P, Krasula L, Kratochvíl T, Slanina M, Říčný V et al.. 2011. DEIMOS – an Open Source Image Database. Radioengineering. 20:1016–1023.
2010
- Fliegel, K, Klíma M, Páta P. 2010. New open source image database for testing and optimization of image processing algorithms. Optics, Photonics, and Digital Technologies for Multimedia Applications. :77231P-1–77231P-8.
- Fliegel, K, Páta P, Klíma M, Blažek M, Havlín J. 2010. Open source database of images DEIMOS: high dynamic range images. Applications of Digital Image Processing XXXIII. :77981G-1–77981G-7.
- Vítek, S, Klíma M. 2010. PERSEUS – Personal Help for Blind User. Applied Electronic 2010. :367–370.
- Páta, P, Fliegel K, Klíma M, Blažek M, Řeřábek M. 2010. Utilization of consumer level digital cameras in astronomy. Applications of Digital Image Processing XXXIII. :77982H-1–77982H-12.
- Dostál, P, Klíma M. 2010. Advanced Color Image Demosaicing In Security Imaging Technology. Proceedings 44th IEEE International Carnahan Conference on Security Technology. :434–442.
- Dostál, P, Klíma M. 2010. Comparing of Several State-of-the-Art Interpolation Techniques. Applied Electronic 2010. :69–74.
- Hudec, R, Spurny M, Krizek M, Páta P, Slosiar R, Řeřábek M, Klíma M. 2010. Detection of GRBs and OTs by All-Sky Optical and SID Monitors. Advances in Astronomy. 2010:1–8.
- Kekrt, D, Podgorný R, Klíma M, Boháč L. 2010. Digital Interpolator Implementation in VHDL. RTT 2010 Proceedings. :168–173.
- Kekrt, D, Klíma M, Podgorný R, Zavrtálek J, Boháč L. 2010. Direct Quadrature Frequency Synthesizer Implementation in VHDL. Knowledge in Telecommunication Technologies and Optics – KTTO 2010. :69–74.
- Hudec, R, Klíma M. 2010. Identification and Analyses in Optical Light of Gamma-Ray Sources with Astronomical Archival Plates. Advances in Astronomy. 2010:1–6.
- Dostál, P, Klíma M. 2010. Image Quality Impact and Comparison of Selected State-of-the-Art CFA. Third International Workshop on Perceptual Quality of Systems. :125–130.
- Kekrt, D, Podgorný R, Klíma M, Boháč L. 2010. Poly-phase Decimation Filter Implementation in VHDL. RTT 2010 Proceedings. :155–160.
- Kekrt, D, Podgorný R, Klíma M, Boháč L. 2010. Quadrature Linear Digital Modulator Implementation in VHDL. Applied Electronic 2010. :153–158.
2009
- Podgorný, R, Klíma M. 2009. Odolnost kodeků MPEG-2 a H.264 proti chybám při přenosu. Access server. 7.:1–5.
- Dostál, P, Klíma M. 2009. Selected Problems of Color Image Demosaicing in Security Imaging. IEEE International Carnahan Conference on Security Technology. 1:297–304.
- Kekrt, D, Klíma M. 2009. An iterative statistical methods application in the reconstruction problem of pictures gained from digital cameras with CCD (CMOS) sensor. {Workshop 09}. A:132–133.
- Podgorný, R, Klíma M. 2009. Bit Error Resilience of MPEG-2 and H.264 Video Compression Codecs. {Proceedings of 19th International Conference Radioelektronika 2009}. :293–295.
- Klíma, M, Fliegel K, Kekrt D, Dostál P, Podgorný R. 2009. Image Quality and QoE in Multimedia Systems. {Proceedings of 19th International Conference Radioelektronika 2009}. :3–10.
- Kekrt, D, Klíma M, Fliegel K. 2009. Restoration of dichromatic images gained from CCD/CMOS camera by iterative detection networks with fragmented marginalization at the symbol block level. {Mathematics for Signal and Information Processing}. :74441A-1–74441A-12.
2008
- Klíma, M, Kekrt D, Podgorný R. 2008. Aspects of image quality enhancement in security technology. Proceedings of 42nd Annual 2008 IEEE International Carnahan Conference on Security Technology. :142–149.
- Kekrt, D, Klíma M. 2008. A Black & White Picture Reconstruction by Iterative Detection Network in the Image Capturing System with CCD (CMOS) Sensor. {Proceedings ELMAR-2008}. 1:125–128.
- Podgorný, R, Klíma M. 2008. Analýza vybraných kodeků z hlediska použitelnosti pro účely bezpečnosti a dohledu. {Sborník příspěvků konference Zvůle 2008}. :194–199.
- Klíma, M, Lhotská L, Chudáček V, Huptych M, Husák M. 2008. Assistive Technologies: New Challenges for Education. {IFMBE Proceedings}. :2730–2733.
- Kekrt, D, Klíma M. 2008. The advanced noise model for an IDN based restoration of black and white pictures captured by a camera with CCD/CMOS sensor. {Proceedings of 42nd Annual 2008 IEEE International Carnahan Conference on Security Technology}. :126–130.
- Kekrt, D, Klíma M. 2008. The iterative detection network based recovery of black & white pictures shot by camera (implementation and complexity reduction issue). {Proceedings of the 18 th International Conference Radioelektronika 2008}. :219–222.
- Kekrt, D, Klíma M, Fliegel K. 2008. The iterative detection network based suppression of the thermal noise and blurring due to object moving in black and white pictures shot by a camera with CCD/CMOS sensor. {Proceedings of SPIE – 7076 – Image Reconstruction from Incomplete Data V}. :70760M-1–70760M-9.
- Kekrt, D, Klíma M, Podgorný R. 2008. The Iterative Detection Network Suppression of Defocusing and Thermal Noise in Black and White Pictures Shot By a Camera with CCD/CMOS Sensor. {Photonics Prague 2008, The 6th International Conference on Photonics, Devices and Systems}. :86.
2007
- Klíma, M, Páta P, Fliegel K, Hanzlík P. 2007. Image Quality Evaluation in Security Imaging Systems. IEEE Aerospace and Electronic Systems Magazine. 22:22–25.
- Klíma, M, Pazderák J, Fliegel K. 2007. Examples of Subjective Image Quality Enhancement in Multimedia. {Applications of Digital Image Processing XXX}. :66961N-01–66961N-09.
- Klíma, M, Fliegel K, Švihlík J. 2007. Experimental Verification of a Posteriori Quality Enhancement of Security Images. {Proceedings 2007 41th IEEE International Carnahan Conference on Security Technology}. :313–319.
- Klíma, M. 2007. Qualitative Aspects of Image Applications in Multimedia Technology. {Proceedings of 17th International Conference Radioelektronika 2007}. 1:111–121.
2006
- Klíma, M, Pazderák J, Reyes JS. 2006. Evaluation and Improvement of Image Quality in Multimedia Imaging Systems. {Radioelektronika 2006 – Conference Proceedings}. :169–172.
- Klíma, M, Fliegel K, Švihlík J. 2006. Quality Enhancement in Security Image Information. {Proceedings of the 40th IEEE International Carnahan Conference on Security Technology}. :60–67.
- Klíma, M. 2006. Subjective Image Quality in Multimedia Systems. {Photonics, Devices, and Systems III}. :1Y-1–1Y-6.
2005
- van Voorthuijsen, G, van Hoof H, Klíma M, Roubík K, Bernas M, Páta P. 2005. CCTV Effectiveness Study. Proc. of 39 IEEE ICCST. :105–108.
- Klíma, M, Páta P, Fliegel K. 2005. Image Quality Evaluation in Applied TV Security Systems. {Radioelektronika 2005 – Conference Proceedings}. :61–64.
- Klíma, M, Bernas M, Husník L, Páta P, Roubík K. 2005. Qualitative Aspects of Image Compression Methods in Multimedia Systems. {Proceedings of Workshop 2005 – Part A,B}. :188–189.
- Klíma, M, Páta P, Fliegel K, Hanzlík P. 2005. Subjective Image Quality Evaluation in Security Imaging Systems. {Proc. of 39 IEEE ICCST}. :19–22.
- Klíma, M. 2005. Subjective Image Quality in Multimedia Systems. {Photonics Prague 2005}. :65.
- Klíma, M, Kaiser J. 2005. Zobrazovací jednotka.
2004
- Klíma, M. 2004. 2D optické (fotonické) procesory. {Optické komunikace 2004}. :95–99.
- Kaiser, J, Klíma M, Košťál E. 2004. Colorimetry Aspects of the New Image Compression Methods. {Proceedings of Workshop 2004}. A:192–193.
- Klíma, M. 2004. Digitální televize – moderní metody komprese obrazu. {Radiokomunikace 2004}. :3–12.
- Klíma, M. 2004. Digitální televize.
- Klíma, M, Fliegel K. 2004. Image Compression Techniques in the Field of Security Technology: Examples and Discussion. {Proceedings of the 38th ANNUAL 2004 International Carnahan Conference on Security Technology}. :278–284.
- Klíma, M, Fliegel K. 2004. Image Compression Techniques in the Field of Security Technology: Examples and Discussion. {Proceedings of the 38th ANNUAL 2004 International Carnahan Conference on Security Technology}. :278–284.
- Klíma, M. 2004. Image Quality in Multimedia Systems. {Conference Proceedings of Radioelektronika 2004}. 1:398–401.
- Klíma, M, Páta P, Tichá D. 2004. Optical 2D JTC Processor. {Nekonvenčné technológie 2004}.
- Páta, P, Klíma M, Schindler J. 2004. Simulace zpracování optické obrazové informace v MATLABu. {MATLAB 2004 – Sborník příspěvků 12. ročníku konference}. 1-2:447–452.
2003
- Kaiser, J, Klíma M, Košťál E. 2003. Colorimetry of the New Scanning and Display Systems. {Proceedings of Workshop 2003}. A:434–435.
- Páta, P, Klíma M. 2003. Efficient Method for Security Image Data Compression. {Proceedings 37th ANNUAL 2003 International Carnahan Conference on Security Technology}. :456–459.
- Klíma, M. 2003. Image Quality Subjective Evaluation for Very High-Rate Image Compression. {Radioelektronika 2003 – Conference Proceedings}. :147–149.
- Rott, J, Klíma M. 2003. Optical Processors. {Proceedings of Workshop 2003}. A:504–505.
- Klíma, M. 2003. Subjective Image Quality in Multimedia Systems. {Digital Communications ’03}. :43–44.
- Klíma, M. 2003. Subjective Quality Aspects of Image Compression in Multimedia. {Proceedings of Workshop 2003}. A:360–361.
- Klíma, M. 2003. Subjective Quality of Image Information in Multimedia. {Proceedings of the 5th COST 276 Workshop}. :7–8.
2002
- Klíma, M, Páta P, Bernas M, Pazderák J. 2002. Highly-Efficient Image Compression Techniques and Subjective Image Quality. Radioelektronika 2002. 1:3–6.
- Klíma, M. 2002. Digitální televize a multimédia – moderní aspekty přenosu obrazu.
- Klíma, M. 2002. Digitální televize a multimédia.
- Klíma, M, Páta P, Kaiser J. 2002. Education of Photonic Methods of Information Processing at the Department of Radioelectronics, Faculty of Electrical Engineering. {Proceedings of Workshop 2002}. A:208–209.
- Klíma, M, Páta P, Kaiser J. 2002. Education of Photonic Methods of Information Processing. {Photonics Prague 2002}. :100.
- Klíma, M, Páta P, Kaiser J. 2002. Education of Photonic Metohods of Information Processing. {SPIE Proceedings, Vol. 5036}. :662–667.
- Klíma, M. 2002. Hodnocení kvality obrazové informace v multimediálních systémech. {8. mezinárodní vedecká konferencia COFAX-TELEKOMUNIKÁCIE 2002 Zborník prednášok}. :P421–P422.
- Klíma, M. 2002. Hodnocení kvality obrazu v moderních kompresních standardech. {Práce a štúdie {\v Z}ilinskej univerzity}. 1:25–30.
- Klíma, M. 2002. Image Quality Evaluation in Multimedia Systems. {8. mezinárodní vedecká konferencia COFAX-TELEKOMUNIKÁCIE 2002 Zborník prednášok}. :421–422.
- Kaiser, J, Klíma M. 2002. Image Quality Evaluation in Multimedia Technology. {Telecommunications and Signal Processing TSP – 2002}. :160–163.
- Klíma, M. 2002. Kvalita obrazové informace v moderních multimediálních systémech. {Informačné a komunikačné technológie pre všetkých}. 1:141–142.
- Klíma, M. 2002. Kvalitativní aspekty moderní multimediální techniky. {Teleinformatika 2002}.
- Roubík, K, Slaninka V, Dušek J, Klíma M, Bernas M. 2002. Model of the Human Visual System for the Evaluation of Perceptual Image Quality of Compressed Images. Perception. 31:140–141.
- Klíma, M. 2002. Moderní metody zpracování obrazového signálu. {Radiokomunikace 2002 – sborník přednášek}. :37–44.
- Klíma, M, Páta P. 2002. Optical JTC Applications in Biomedical Image Processing. {Biomedical Engineering and Education}. :123–124.
- Klíma, M. 2002. Recenze monografie Vlček,K.: Komprese a kódová zabezpečení v multimediálních komunikacích. Sdělovací technika. 50.
- Klíma, M, Klouček V. 2002. Some Remarks on Very High-Rate Image Compression and Its Impact on Security Image Data Subjective Evaluation. {Proceedings of 36th ANNUAL 2002 International Carnahan Conference on Security Technology}. :198–201.
- Klíma, M, Rott J, Páta P. 2002. Testing of Security Application of Optical JTC. {SPIE Proceedings, Vol. 5036}. :102–106.
- Klíma, M. 2002. Testing of Security Applications of Optical JCT. {Photonics Prague 2002}. :61.
- Klíma, M, Kaiser J. 2002. Zobrazovací jednotka.