Chair of Multimedia Telecommunications and Microelectronics


Tomasz Grajek

Tomasz Grajek

(born 1980) received his M.Sc. and Ph.D. degrees from Poznan University of Technology in 2004 and 2010 respectively. At present he is an research assistant at Chair of Multimedia Telecommunications and Microelectronics.

Member of Institute of Electrical and Electronics Engineers (IEEE) and Polish Society for Theoretical and Applied Electrical Engineering (PTETiS).

He is an author and co-author of about 50 papers on digital video compression, modeling of advanced video encoders, digital video watermarking and stereoscopic video surveillance systems. He has been taking part in several projects for industrial research and development:

  • A simple system for free-viewpoint television (FTV)
  • Video transcoders development (AVC to HEVC, HEVC to HEVC)
  • HEVC (MPEG-H part 2 / H.265) video codec software implementation and development
  • AVC (MPEG-4 part 10 / H.264) video codec software implementation and development
  • MPEG-2 to AVC (MPEG-4 part 10 / H.264) video transcoder development
  • Automatic image quality improvements
  • Scalable video encoder and decoder improvements
  • Compressed video bitstream watermarking
  • Automatic system for vehicle data extraction using stereoscopic video analysis

He received several awards and grants (selected):

  • Short Term Scientific Mission, “Compression of Light Field images with help of 3D-HEVC”, Politechnic Institute of Leiria, Portugal, September 2015
  • Trainee Grant Award, COST Action IC1105, ISCTE – Instituto Universitário de Lisboa, Lisbon, Portugal, July 2015
  • Poznan University of Technology, Rector's Scientific Award, 2014
  • Trainee Grant Award, COST Action IC1105, University of Technology and Economics, Budapest, Hungary,July 2014
  • GOLD MEDAL in the contest INNOVATION 2013 during 9th Industrial Technology, Science and Innovation Fair "TECHNICON-INNOVATION 2013" for “Stereoscopic system for estimation of vehicle size” (group award), Gdańsk, 2013
  • Poznan University of Technology, Rector's Organization Award, 2013
  • Kalman Fazekas Special Award for the best paper presented on International Conference on Systems, Signals and Image Processing, IWSSIP, Bucharest, 2013
  • Poznan University of Technology, Rector's Scientific Award, 2012
  • The best Ph.D. thesis in the domain of image processing from Association for Image Processing, 2012
  • Poznan University of Technology, Rector's Scientific Award, 2011

His current researches encompass implementing and optimizing video encoders and decoders, modeling of advanced video coders, stereoscopic video surveillance system and video transcoding and watermarking.

He is interested in network issues, basketball, film and tourism.

Contact

Room: 137 (Polanka)
Phone: +48 61 665 3841
Mail: tgrajek@multimedia.edu.pl

Advisor hours

Wed 13:15 - 14:15, Fri 13:15 - 14:15

Awards

Research projects

Publications

Book chapters

  1. Damian Karwowski, Tomasz Grajek, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    Book: Image Processing and Communications Challenges 8,
    Chapter: 20 Years of Progress in Video Compression - from MPEG-1 to MPEG-H HEVC. General View on the Path of Video Coding Development,
    Advances in Intelligent Systems and Computing: No. 525, Springer International, 2016, pp. 3-15, ISBN: 978-3-319-47273-7, ISSN: 2194-5375,
    Full textEndNoteCitationDOI
  2. Tomasz Grajek, Damian Karwowski, Jakub Stankowski,
    Book: Image Processing and Communications Challenges 7,
    Chapter: Algorithmically optimized AVC video encoder with parallel processing of data,
    Advances in Intelligent Systems and Computing: No. 389, Springer International, 2015, pp. 97-104, ISBN: 978-3-319-23813-5, ISSN: 2194-5375,
    Full textEndNoteCitationDOI

International journals

  1. Jakub Stankowski, Damian Karwowski, Tomasz Grajek, Krzysztof Wegner, Jakub Siast, Krzysztof Klimaszewski, Olgierd Stankiewicz, Marek Domański,
    Analysis of Compressed Data Stream Content in HEVC Video Encoder,
    International Journal of Electronics and Telecommunications, Vol. 61, No. 2, Electronics and Telecommunications Committee of Polish Academy of Sciences, Warsaw, 2015, pp. 121-127, ISSN: 0867-6747,
    Full textEndNoteCitationDOICited 1 times
  2. Filip Lewandowski, Mateusz Paluszkiewicz, Tomasz Grajek, Krzysztof Wegner,
    Methodology for 3D video subjective quality evaluation,
    International Journal of Electronics and Telecommunications, Vol. 59, No. 1, 2013, pp. 25-32,
    Full textEndNoteCitation
  3. Marek Domański, Olgierd Stankiewicz, Krzysztof Wegner, Maciej Kurc, Jacek Konieczny, Jakub Siast, Jakub Stankowski, Robert Ratajczak, Tomasz Grajek,
    High Efficiency 3D Video Coding Using New Tools Based on View Synthesis,
    IEEE Transactions on Image Processing, Special Issue on 3D Video Representation, Compression, & Rendering, Vol. 22, No. 9, September 2013, pp. 3517-3527,
    Full textEndNoteCitationDOICited 10 times

International conferences

  1. Marek Domański, Olgierd Stankiewicz, Krzysztof Wegner, Tomasz Grajek,
    Immersive visual media – MPEG-I: 360 video, virtual navigation and beyond,
    IEEE International Conference on Systems, Signals and Image Processing IWSSIP 2017, Poznań, Poland, 22-24 May 2017,
    Full textEndNoteCitation
  2. Olgierd Stankiewicz, Krzysztof Wegner, Damian Karwowski, Jakub Stankowski, Krzysztof Klimaszewski, Tomasz Grajek,
    Encoding mode selection in HEVC with the use of noise reduction,
    IEEE International Conference on Systems, Signals and Image Processing IWSSIP 2017, Poznań, Poland, 22-24 May 2017,
    Full textEndNoteCitation
  3. Krzysztof Wegner, Damian Karwowski, Krzysztof Klimaszewski, Jakub Stankowski, Olgierd Stankiewicz, Tomasz Grajek,
    Homogenous HEVC video transcoding by transform coefficient removal,
    IEEE International Conference on Systems, Signals and Image Processing IWSSIP 2017, Poznań, Poland, 22-24 May 2017,
    Full textEndNoteCitation
  4. Jakub Stankowski, Damian Karwowski, Krzysztof Klimaszewski, Krzysztof Wegner, Olgierd Stankiewicz, Tomasz Grajek,
    Analysis of the complexity of the HEVC motion estimation,
    23rd International Conference on Systems, Signals and Image Processing, IWSSIP 2016, Bratislava, Slovakia, 23-25 May 2016, pp. 1-4, ISBN: 978-1-4673-9555-7 , ISSN: 2157-8702,
    Full textEndNoteCitationDOI
  5. Gauthier Lafruit, Marek Domański, Krzysztof Wegner, Tomasz Grajek, Takanori Senoh, Joel Jung, Peter Tamas Kovacs, Patrik Goorts, Lode Jorissen, Adrian Munteanu, Beerend Ceulemans, Pablo Carballeira, Sergio Garcia, Masayuki Tanimoto,
    New visual coding exploration in MPEG: Super-MultiView and Free Navigation in Free viewpoint TV,
    International Symposium on Electronic Imaging Science and Technology 2016, Stereoscopic Displays and Applications, San Francisco, California, USA, 14-18 February, 2016,
    Full textEndNoteCitation
  6. Jakub Stankowski, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Krzysztof Wegner,
    Computational complexity tradeoffs in HEVC motion estimation,
    International Conference on Signals and Electronic Systems, ICSES 2016, Kraków, Poland, September 5-7 2016, pp. 124-128, ISBN: 978-1-5090-2667-8,
    Full textEndNoteCitationDOI
  7. Jakub Stankowski, Cezary Korzeniewski, Marek Domański, Tomasz Grajek,
    Rate-distortion optimized quantization in HEVC: performance limitations,
    31st Picture Coding Symposium, PCS 2015, Cairns, Australia, 31 May - 3 June 2015, pp. 85-89,
    Full textEndNoteCitationDOI
  8. Jakub Stankowski, Damian Karwowski, Krzysztof Wegner, Olgierd Stankiewicz, Krzysztof Klimaszewski, Tomasz Grajek,
    Analysis of CABAC context models efficiency in the HEVC,
    57th International Symposium ELMAR-2015, Zadar, Croatia, 28-30 September 2015, pp. 217-220, ISBN: 978-953-184-209-9,
    Full textEndNoteCitationDOI
  9. Jakub Stankowski, Łukasz Kowalski, Jarosław Samelak, Marek Domański, Tomasz Grajek, Krzysztof Wegner,
    3D-HEVC Extension for Circular Camera Arrangements,
    3DTV Conference: The True Vision-Capture, Transmission and Display of 3D Video, 3DTV- Con 2015, Lisbon, Portugal, 8-10 July 2015,
    Full textEndNoteCitationCited 1 times
  10. Tomasz Grajek, Jakub Stankowski, Krzysztof Wegner, Marek Domański,
    Video quality in AVC homogenous transcoding,
    21st International Conference on Systems, Signals and Image Processing, IWSSIP 2014, Dubrovnik, Croatia, 12-15 May 2014, pp. 211-214,
    Full textEndNoteCitation
  11. Jakub Stankowski, Damian Karwowski, Tomasz Grajek, Krzysztof Wegner, Jakub Siast, Krzysztof Klimaszewski, Olgierd Stankiewicz, Marek Domański,
    Bitrate Distribution of Syntax Elements in the HEVC Encoded Video,
    International Conference on Signals and Electronic Systems, ICSES 2014, Poznań, Poland, 11-13 September 2014, ISBN: 978-1-4799-7009-4,
    Full textEndNoteCitationDOI
  12. Jakub Stankowski, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Krzysztof Wegner, Marek Domański,
    Analysis of frame partitioning in HEVC,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2014, Warsaw, Poland, 15-17 September 2014, pp. 602-609,
    Full textEndNoteCitationCited 1 times
  13. Jakub Siast, Jakub Stankowski, Tomasz Grajek, Marek Domański,
    Digital Watermarking with Local Strength Adjustment for AVC-Compressed HDTV Bitstreams,
    30th Picture Coding Symposium, PCS 2013, San Jose, CA, USA, 8-11 December 2013, pp. 53-56,
    Full textEndNoteCitationDOICited 2 times
  14. Jakub Stankowski, Tomasz Grajek, Krzysztof Wegner, Marek Domański,
    Video Quality in Multiple HEVC Encoding-Decoding Cycles,
    20th International Conference on Systems, Signals and Image Processing, IWSSIP 2013, Bucharest, Romania, 7-9 July 2013, pp. 75-78, ISBN: 978-1-4799-0941-4,
    Full textEndNoteCitationCited 1 times
  15. Tomasz Grajek, Robert Ratajczak, Marek Domański, Krzysztof Wegner,
    Limitations of Vehicle Length Estimation Using Stereoscopic Video Analysis,
    20th International Conference on Systems, Signals and Image Processing, IWSSIP 2013, Bucharest, Romania, 7-9 July 2013, pp. 27-30, ISBN: 978-1-4799-0941-4,
    Full textEndNoteCitation
  16. Robert Ratajczak, Tomasz Grajek, Krzysztof Wegner, Krzysztof Klimaszewski, Maciej Kurc, Marek Domański,
    Vehicle Dimensions Estimation Scheme Using AAM on Stereoscopic Video,
    10th IEEE International Conference on Advanced Video and Signal-Based Surveillance, AVSS 2013, Workshop on Vehicle Retrieval in Surveillance (VRS) 2013, Kraków, Poland, 27-30 August 2013, pp. 478-482,
    Full textEndNoteCitationCited 4 times
  17. Jakub Stankowski, Tomasz Grajek, Marek Domański,
    Fast watermarking of MPEG-4 AVC/H.264 encoded HDTV video bitstreams,
    29th Picture Coding Symposium, PCS 2012, Kraków, Poland, 7-9 May 2012, pp. 265-268,
    Full textEndNoteCitationDOICited 2 times
  18. Filip Lewandowski, Mateusz Paluszkiewicz, Tomasz Grajek, Krzysztof Wegner,
    Subjective Quality Assessment Methodology for 3D video Compression Technology ,
    International Conference on Signal and Electronics Systems, ICSES 2012, Wrocław, Poland, 18-21 September 2012, pp. 1-5, ISBN: 978-1-4673-1710-8,
    Full textEndNoteCitationDOICited 2 times
  19. Adam Łuczak, Sławomir Maćkowiak, Damian Karwowski, Tomasz Grajek,
    A Large Barrel Distortion in an Acquisition System for Multifocal Images Extraction,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2012, Warsaw, Poland, 24-26 September 2012, pp. 164-171,
    Full textEndNoteCitation
  20. Adam Łuczak, Damian Karwowski, Sławomir Maćkowiak, Tomasz Grajek,
    Diamond scanning order of image blocks for massively parallel HEVC compression,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2012, Warsaw, Poland, 24-26 September 2012, pp. 172-179,
    Full textEndNoteCitation
  21. Tomasz Grajek, Damian Karwowski, Adam Łuczak, Sławomir Maćkowiak, Marek Domański,
    Architecture of Algorithmically Optimized MPEG-4 AVC/H.264 Video Encoder,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2012, Warsaw, Poland, 24-26 September 2012, pp. 79-86,
    Full textEndNoteCitationCited 2 times
  22. Tomasz Grajek, Marek Domański,
    New model of MPEG-4 AVC/H.264 video encoders,
    4th Microwave and Radar Week, Hong Kong, China, 26-29 September 2010,
    Full textEndNoteCitation
  23. Tomasz Grajek, Marek Domański,
    New model of MPEG-4 AVC/H.264 video encoders,
    17th International Conference on Image Processing, ICIP 2010, Hong Kong, 26-29 September 2010, pp. 961-964, ISBN: 978-1-4244-7992-4,
    Full textEndNoteCitationDOI
  24. Tomasz Grajek, Marek Domański,
    Single Frame Rate-Quantization Model for MPEG-4 AVC/H.264 Video Encoders,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2010, Springer-Verlag, 20-22 September 2010, pp. 25-32,
    Full textEndNoteCitation
  25. Tomasz Grajek, Marek Domański,
    A global model of AVC/H.264 video encoders,
    27th Picture Coding Symposium, PCS 2009, Chicago, USA, 6-8 May 2009, pp. 1-4,
    Full textEndNoteCitationDOI
  26. Tomasz Grajek, Marek Domański,
    A Simple Quantitative Model of AVC/H.264 Video Coders,
    International Conference on Computer Vision and Graphics, Warsaw, Poland, 10-12 November 2008,
    Full textEndNoteCitation

International conferences - standardization

  1. Krzysztof Wegner, Olgierd Stankiewicz, Tomasz Grajek, Marek Domański,
    Depth map formats used within MPEG 3D frameworks,
    ISO/IEC JTC1/SC29/WG11 MPEG2017, M40019, Geneva, Switzerland, 16-20 January 2017,
    EndNoteCitation
  2. Gauthier Lafruit, Krzysztof Wegner, Tomasz Grajek, Takanori Senoh, Peter Kovacs, Patrik Goorts, Lode Jorissen, Beerend Ceulemans, Pablo Lopez, Sergio Lobo, Qing Wang, Joel Jung, Masayuki Tanimoto,
    FTV software user guidelines,
    ISO/IEC JTC1/SC29/WG11 MPEG2015, M36590, Warsaw, Poland, 20-27 June 2015,
    Full textEndNoteCitation
  3. Tomasz Grajek, Olgierd Stankiewicz, Krzysztof Wegner,
    Correlation analysis between MOS data collected on stereoscopic and autostereoscopic displays,
    Joint Collaborative Team on 3D Video Coding Extension Development of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, 3rd Meeting, JCT3V-C0202, Geneva, Switzerland, 17-23 January 2013,
    Full textEndNoteCitation
  4. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Jacek Konieczny, Maciej Kurc, Adam Łuczak, Robert Ratajczak, Jakub Siast, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    Multiview HEVC – experimental results,
    Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, MPEG 2011 / M22147, Geneva, Switzerland, 28 November - 02 December 2011,
    Full textEndNoteCitationCited 1 times

National journals

  1. Mateusz Sokołowski, Krzysztof Wegner, Tomasz Grajek,
    Prosty wielokamerowy system rejestracji obrazu na potrzeby badań nad telewizją swobodnego punktu widzenia,
    Przegląd Telekomunikacyjny, Vol. 86, No. 6, Poznań, Poland, 2017, pp. 413-416, ISSN: 1230-3496,
    Full textEndNoteCitation
  2. Hubert Żabiński, Krzysztof Wegner, Jakub Stankowski, Tomasz Grajek,
    Wpływ algorytmów demozaikowania na dokładność kalibracji systemów wielokamerowych,
    Przegląd Telekomunikacyjny, Vol. 86, No. 6, Poznań, Poland, 2017, pp. 475-478, ISSN: 1230-3496,
    Full textEndNoteCitation
  3. Tomasz Grajek, Maciej Celmer, Monika Trączyńska, Krzysztof Wegner,
    Optyczny skaner obiektów trójwymiarowych,
    Przegląd Telekomunikacyjny, No. 4/2015, April 2015, pp. 400-403,
    Full textEndNoteCitation

National conferences

  1. Tomasz Dzięcielewski, Tomasz Grajek, Jarosław Marek,
    Eksperymentalna analiza efektywności trybów kodowania międzyobrazowego w zaawansowanym koderze wizyjnym,
    Krajowa Konferencja Radiokomunikacji, Radiofonii i Telewizji, KKRRiT 2006, Poznań, Poland, 7-9 czerwca 2006, pp. 219-222,
    Full textEndNoteCitation
  2. Tomasz Dzięcielewski, Tomasz Grajek, Jarosław Marek,
    Eksperymentalna analiza częstotliwości wyboru trybów zaawansowanego kodowania wizyjnego,
    X Poznańskie Warsztaty Telekomunikacyjne, PWT 2005, Poznań, Poland, 8-9 grudnia 2005, pp. 115-120,
    Full textEndNoteCitation
  3. Tomasz Grajek, Damian Karwowski,
    Złożoność obliczeniowa i efektywność kodowania entropijnego w standardzie H.264/AVC,
    Krajowa Konferencja Radiokomunikacji, Radiofonii i Telewizji, KKRRiT 2005, Kraków, Poland, 15-17 czerwca 2005, pp. 377-380,
    Full textEndNoteCitation

Patents & Applications

  1. Marek Domański, Tomasz Grajek, Krzysztof Klimaszewski, Adam Łuczak, Robert Ratajczak, Krzysztof Wegner,
    A system and method for object dimension estimation using 3D models,
    Patent office: USPTO, Status: granted,
    Application number: US 14/690484, Filling date: 20.04.2015,
    Patent number: US 9430850, Date of Patent: 30.08.2016,
    EndNoteCitation
  2. Adam Łuczak, Sławomir Maćkowiak, Marek Domański, Jakub Siast, Tomasz Grajek,
    A system and a method for tracking objects,
    Patent office: USPTO, Status: granted,
    Application number: US 14/664862, Filling date: 22.03.2015,
    Patent number: US 9672634, Date of Patent: 06.06.2017,
    EndNoteCitation
  3. Marek Domański, Tomasz Grajek, Krzysztof Klimaszewski, Maciej Kurc, Jakub Stankowski, Robert Ratajczak, Krzysztof Wegner,
    A system and method for object dimension estimation,
    Patent office: USPTO, Status: granted,
    Application number: US 14/664983, Filling date: 23.03.2015,
    Patent number: US 9384417, Date of Patent: 5.07.2017,
    EndNoteCitation
  4. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A system and a method for generating a depth map,
    Patent office: USPTO, Status: application,
    Application number: US 14/665004, Filling date: 23.03.2015,
    Publication number: US 2016/0275691, Publication date: 22.09.2016,
    Patent number: US 9646385, Date of Patent: 09.05.2017,
    EndNoteCitation
  5. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A method for predictive coding of depth maps and a depth map encoder,
    Patent office: EPO, Status: granted,
    Application number: EP 15461541.3, Filling date: 25.06.2015,
    Publication number: EP 3110155A1, Publication date: 28.12.2016,
    Patent number: EP 3110155, Date of Patent: 21.06.2017,
    Validated in: PL, DE, FR, GB,
    EndNoteCitation
  6. Adam Łuczak, Sławomir Maćkowiak, Marek Domański, Jakub Siast, Tomasz Grajek,
    A system and a method for estimation of motion,
    Patent office: EPO, Status: application,
    Application number: EP15159620.2, Filling date: 18.03.2015,
    EndNoteCitation
  7. Marek Domański, Tomasz Grajek, Krzysztof Klimaszewski, Maciej Kurc, Jakub Stankowski, Robert Ratajczak, Krzysztof Wegner,
    A system and method for object dimension estimation,
    Patent office: EPO, Status: application,
    Application number: EP15160202.06, Filling date: 23.03.2015,
    Publication number: EP3073442, Publication date: 28.09.2016,
    Patent number: EP3073442, Date of Patent: 01.03.2017,
    Validated in: PL, DE, FR, GB,
    EndNoteCitation
  8. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A system and a method for video encoding,
    Patent office: USPTO, Status: application,
    Application number: US 14/578435, Filling date: 21.12.2014,
    EndNoteCitation
  9. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A system and a method for video encoding,
    Patent office: EPO, Status: application,
    Application number: EP 14195038.6, Filling date: 27.11.2014,
    EndNoteCitation
  10. Marek Domański, Tomasz Grajek, Jacek Konieczny, Maciej Kurc, Adam Łuczak, Jakub Siast, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    Method for coding of stereoscopic depth,
    Patent office: USPTO, Status: application,
    Application number: US 13/680822, Filling date: 19.11.2012,
    Publication number: US 2013/0129244A1, Publication date: 23.05.2013,
    EndNoteCitation

Dissertations

  1. Tomasz Grajek,
    Modelowanie zaawansowanych koderów wizyjnych,
    PhD Dissertation at Poznan University of Technology, Faculty of Electronics and Telecommunications, 2010,
    Supervisor: prof. dr hab. inż. Marek Domański, Reviewers: prof. dr hab. inż. Władysław Skarbek, prof. dr hab. inż. Ryszard Stasiński,
    Abstract (pol)Full text (pol)EndNoteCitation

2017

  1. Mateusz Sokołowski, Krzysztof Wegner, Tomasz Grajek,
    Prosty wielokamerowy system rejestracji obrazu na potrzeby badań nad telewizją swobodnego punktu widzenia,
    Przegląd Telekomunikacyjny, Vol. 86, No. 6, Poznań, Poland, 2017, pp. 413-416, ISSN: 1230-3496,
    Full textEndNoteCitation

  2. Hubert Żabiński, Krzysztof Wegner, Jakub Stankowski, Tomasz Grajek,
    Wpływ algorytmów demozaikowania na dokładność kalibracji systemów wielokamerowych,
    Przegląd Telekomunikacyjny, Vol. 86, No. 6, Poznań, Poland, 2017, pp. 475-478, ISSN: 1230-3496,
    Full textEndNoteCitation

  3. Krzysztof Wegner, Olgierd Stankiewicz, Tomasz Grajek, Marek Domański,
    Depth map formats used within MPEG 3D frameworks,
    ISO/IEC JTC1/SC29/WG11 MPEG2017, M40019, Geneva, Switzerland, 16-20 January 2017,
    EndNoteCitation

  4. Marek Domański, Olgierd Stankiewicz, Krzysztof Wegner, Tomasz Grajek,
    Immersive visual media – MPEG-I: 360 video, virtual navigation and beyond,
    IEEE International Conference on Systems, Signals and Image Processing IWSSIP 2017, Poznań, Poland, 22-24 May 2017,
    Full textEndNoteCitation

  5. Olgierd Stankiewicz, Krzysztof Wegner, Damian Karwowski, Jakub Stankowski, Krzysztof Klimaszewski, Tomasz Grajek,
    Encoding mode selection in HEVC with the use of noise reduction,
    IEEE International Conference on Systems, Signals and Image Processing IWSSIP 2017, Poznań, Poland, 22-24 May 2017,
    Full textEndNoteCitation

  6. Krzysztof Wegner, Damian Karwowski, Krzysztof Klimaszewski, Jakub Stankowski, Olgierd Stankiewicz, Tomasz Grajek,
    Homogenous HEVC video transcoding by transform coefficient removal,
    IEEE International Conference on Systems, Signals and Image Processing IWSSIP 2017, Poznań, Poland, 22-24 May 2017,
    Full textEndNoteCitation

2016

  1. Jakub Stankowski, Damian Karwowski, Krzysztof Klimaszewski, Krzysztof Wegner, Olgierd Stankiewicz, Tomasz Grajek,
    Analysis of the complexity of the HEVC motion estimation,
    23rd International Conference on Systems, Signals and Image Processing, IWSSIP 2016, Bratislava, Slovakia, 23-25 May 2016, pp. 1-4, ISBN: 978-1-4673-9555-7 , ISSN: 2157-8702,
    Full textEndNoteCitationDOI

  2. Damian Karwowski, Tomasz Grajek, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    Book: Image Processing and Communications Challenges 8,
    Chapter: 20 Years of Progress in Video Compression - from MPEG-1 to MPEG-H HEVC. General View on the Path of Video Coding Development,
    Advances in Intelligent Systems and Computing: No. 525, Springer International, 2016, pp. 3-15, ISBN: 978-3-319-47273-7, ISSN: 2194-5375,
    Full textEndNoteCitationDOI

  3. Gauthier Lafruit, Marek Domański, Krzysztof Wegner, Tomasz Grajek, Takanori Senoh, Joel Jung, Peter Tamas Kovacs, Patrik Goorts, Lode Jorissen, Adrian Munteanu, Beerend Ceulemans, Pablo Carballeira, Sergio Garcia, Masayuki Tanimoto,
    New visual coding exploration in MPEG: Super-MultiView and Free Navigation in Free viewpoint TV,
    International Symposium on Electronic Imaging Science and Technology 2016, Stereoscopic Displays and Applications, San Francisco, California, USA, 14-18 February, 2016,
    Full textEndNoteCitation

  4. Jakub Stankowski, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Krzysztof Wegner,
    Computational complexity tradeoffs in HEVC motion estimation,
    International Conference on Signals and Electronic Systems, ICSES 2016, Kraków, Poland, September 5-7 2016, pp. 124-128, ISBN: 978-1-5090-2667-8,
    Full textEndNoteCitationDOI

2015

  1. Marek Domański, Tomasz Grajek, Krzysztof Klimaszewski, Adam Łuczak, Robert Ratajczak, Krzysztof Wegner,
    A system and method for object dimension estimation using 3D models,
    Patent office: USPTO, Status: granted,
    Application number: US 14/690484, Filling date: 20.04.2015,
    Patent number: US 9430850, Date of Patent: 30.08.2016,
    EndNoteCitation

  2. Adam Łuczak, Sławomir Maćkowiak, Marek Domański, Jakub Siast, Tomasz Grajek,
    A system and a method for tracking objects,
    Patent office: USPTO, Status: granted,
    Application number: US 14/664862, Filling date: 22.03.2015,
    Patent number: US 9672634, Date of Patent: 06.06.2017,
    EndNoteCitation

  3. Marek Domański, Tomasz Grajek, Krzysztof Klimaszewski, Maciej Kurc, Jakub Stankowski, Robert Ratajczak, Krzysztof Wegner,
    A system and method for object dimension estimation,
    Patent office: USPTO, Status: granted,
    Application number: US 14/664983, Filling date: 23.03.2015,
    Patent number: US 9384417, Date of Patent: 5.07.2017,
    EndNoteCitation

  4. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A system and a method for generating a depth map,
    Patent office: USPTO, Status: application,
    Application number: US 14/665004, Filling date: 23.03.2015,
    Publication number: US 2016/0275691, Publication date: 22.09.2016,
    Patent number: US 9646385, Date of Patent: 09.05.2017,
    EndNoteCitation

  5. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A method for predictive coding of depth maps and a depth map encoder,
    Patent office: EPO, Status: granted,
    Application number: EP 15461541.3, Filling date: 25.06.2015,
    Publication number: EP 3110155A1, Publication date: 28.12.2016,
    Patent number: EP 3110155, Date of Patent: 21.06.2017,
    Validated in: PL, DE, FR, GB,
    EndNoteCitation

  6. Adam Łuczak, Sławomir Maćkowiak, Marek Domański, Jakub Siast, Tomasz Grajek,
    A system and a method for estimation of motion,
    Patent office: EPO, Status: application,
    Application number: EP15159620.2, Filling date: 18.03.2015,
    EndNoteCitation

  7. Marek Domański, Tomasz Grajek, Krzysztof Klimaszewski, Maciej Kurc, Jakub Stankowski, Robert Ratajczak, Krzysztof Wegner,
    A system and method for object dimension estimation,
    Patent office: EPO, Status: application,
    Application number: EP15160202.06, Filling date: 23.03.2015,
    Publication number: EP3073442, Publication date: 28.09.2016,
    Patent number: EP3073442, Date of Patent: 01.03.2017,
    Validated in: PL, DE, FR, GB,
    EndNoteCitation

  8. Jakub Stankowski, Cezary Korzeniewski, Marek Domański, Tomasz Grajek,
    Rate-distortion optimized quantization in HEVC: performance limitations,
    31st Picture Coding Symposium, PCS 2015, Cairns, Australia, 31 May - 3 June 2015, pp. 85-89,
    Full textEndNoteCitationDOI

  9. Gauthier Lafruit, Krzysztof Wegner, Tomasz Grajek, Takanori Senoh, Peter Kovacs, Patrik Goorts, Lode Jorissen, Beerend Ceulemans, Pablo Lopez, Sergio Lobo, Qing Wang, Joel Jung, Masayuki Tanimoto,
    FTV software user guidelines,
    ISO/IEC JTC1/SC29/WG11 MPEG2015, M36590, Warsaw, Poland, 20-27 June 2015,
    Full textEndNoteCitation

  10. Tomasz Grajek, Maciej Celmer, Monika Trączyńska, Krzysztof Wegner,
    Optyczny skaner obiektów trójwymiarowych,
    Przegląd Telekomunikacyjny, No. 4/2015, April 2015, pp. 400-403,
    Full textEndNoteCitation

  11. Tomasz Grajek, Damian Karwowski, Jakub Stankowski,
    Book: Image Processing and Communications Challenges 7,
    Chapter: Algorithmically optimized AVC video encoder with parallel processing of data,
    Advances in Intelligent Systems and Computing: No. 389, Springer International, 2015, pp. 97-104, ISBN: 978-3-319-23813-5, ISSN: 2194-5375,
    Full textEndNoteCitationDOI

  12. Jakub Stankowski, Damian Karwowski, Tomasz Grajek, Krzysztof Wegner, Jakub Siast, Krzysztof Klimaszewski, Olgierd Stankiewicz, Marek Domański,
    Analysis of Compressed Data Stream Content in HEVC Video Encoder,
    International Journal of Electronics and Telecommunications, Vol. 61, No. 2, Electronics and Telecommunications Committee of Polish Academy of Sciences, Warsaw, 2015, pp. 121-127, ISSN: 0867-6747,
    Full textEndNoteCitationDOICited 1 times

  13. Jakub Stankowski, Damian Karwowski, Krzysztof Wegner, Olgierd Stankiewicz, Krzysztof Klimaszewski, Tomasz Grajek,
    Analysis of CABAC context models efficiency in the HEVC,
    57th International Symposium ELMAR-2015, Zadar, Croatia, 28-30 September 2015, pp. 217-220, ISBN: 978-953-184-209-9,
    Full textEndNoteCitationDOI

  14. Jakub Stankowski, Łukasz Kowalski, Jarosław Samelak, Marek Domański, Tomasz Grajek, Krzysztof Wegner,
    3D-HEVC Extension for Circular Camera Arrangements,
    3DTV Conference: The True Vision-Capture, Transmission and Display of 3D Video, 3DTV- Con 2015, Lisbon, Portugal, 8-10 July 2015,
    Full textEndNoteCitationCited 1 times

2014

  1. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A system and a method for video encoding,
    Patent office: USPTO, Status: application,
    Application number: US 14/578435, Filling date: 21.12.2014,
    EndNoteCitation

  2. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    A system and a method for video encoding,
    Patent office: EPO, Status: application,
    Application number: EP 14195038.6, Filling date: 27.11.2014,
    EndNoteCitation

  3. Tomasz Grajek, Jakub Stankowski, Krzysztof Wegner, Marek Domański,
    Video quality in AVC homogenous transcoding,
    21st International Conference on Systems, Signals and Image Processing, IWSSIP 2014, Dubrovnik, Croatia, 12-15 May 2014, pp. 211-214,
    Full textEndNoteCitation

  4. Jakub Stankowski, Damian Karwowski, Tomasz Grajek, Krzysztof Wegner, Jakub Siast, Krzysztof Klimaszewski, Olgierd Stankiewicz, Marek Domański,
    Bitrate Distribution of Syntax Elements in the HEVC Encoded Video,
    International Conference on Signals and Electronic Systems, ICSES 2014, Poznań, Poland, 11-13 September 2014, ISBN: 978-1-4799-7009-4,
    Full textEndNoteCitationDOI

  5. Jakub Stankowski, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Olgierd Stankiewicz, Krzysztof Wegner, Marek Domański,
    Analysis of frame partitioning in HEVC,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2014, Warsaw, Poland, 15-17 September 2014, pp. 602-609,
    Full textEndNoteCitationCited 1 times

2013

  1. Jakub Siast, Jakub Stankowski, Tomasz Grajek, Marek Domański,
    Digital Watermarking with Local Strength Adjustment for AVC-Compressed HDTV Bitstreams,
    30th Picture Coding Symposium, PCS 2013, San Jose, CA, USA, 8-11 December 2013, pp. 53-56,
    Full textEndNoteCitationDOICited 2 times

  2. Filip Lewandowski, Mateusz Paluszkiewicz, Tomasz Grajek, Krzysztof Wegner,
    Methodology for 3D video subjective quality evaluation,
    International Journal of Electronics and Telecommunications, Vol. 59, No. 1, 2013, pp. 25-32,
    Full textEndNoteCitation

  3. Tomasz Grajek, Olgierd Stankiewicz, Krzysztof Wegner,
    Correlation analysis between MOS data collected on stereoscopic and autostereoscopic displays,
    Joint Collaborative Team on 3D Video Coding Extension Development of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, 3rd Meeting, JCT3V-C0202, Geneva, Switzerland, 17-23 January 2013,
    Full textEndNoteCitation

  4. Jakub Stankowski, Tomasz Grajek, Krzysztof Wegner, Marek Domański,
    Video Quality in Multiple HEVC Encoding-Decoding Cycles,
    20th International Conference on Systems, Signals and Image Processing, IWSSIP 2013, Bucharest, Romania, 7-9 July 2013, pp. 75-78, ISBN: 978-1-4799-0941-4,
    Full textEndNoteCitationCited 1 times

  5. Tomasz Grajek, Robert Ratajczak, Marek Domański, Krzysztof Wegner,
    Limitations of Vehicle Length Estimation Using Stereoscopic Video Analysis,
    20th International Conference on Systems, Signals and Image Processing, IWSSIP 2013, Bucharest, Romania, 7-9 July 2013, pp. 27-30, ISBN: 978-1-4799-0941-4,
    Full textEndNoteCitation

  6. Marek Domański, Olgierd Stankiewicz, Krzysztof Wegner, Maciej Kurc, Jacek Konieczny, Jakub Siast, Jakub Stankowski, Robert Ratajczak, Tomasz Grajek,
    High Efficiency 3D Video Coding Using New Tools Based on View Synthesis,
    IEEE Transactions on Image Processing, Special Issue on 3D Video Representation, Compression, & Rendering, Vol. 22, No. 9, September 2013, pp. 3517-3527,
    Full textEndNoteCitationDOICited 10 times

  7. Robert Ratajczak, Tomasz Grajek, Krzysztof Wegner, Krzysztof Klimaszewski, Maciej Kurc, Marek Domański,
    Vehicle Dimensions Estimation Scheme Using AAM on Stereoscopic Video,
    10th IEEE International Conference on Advanced Video and Signal-Based Surveillance, AVSS 2013, Workshop on Vehicle Retrieval in Surveillance (VRS) 2013, Kraków, Poland, 27-30 August 2013, pp. 478-482,
    Full textEndNoteCitationCited 4 times

2012

  1. Marek Domański, Tomasz Grajek, Jacek Konieczny, Maciej Kurc, Adam Łuczak, Jakub Siast, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    Method for coding of stereoscopic depth,
    Patent office: USPTO, Status: application,
    Application number: US 13/680822, Filling date: 19.11.2012,
    Publication number: US 2013/0129244A1, Publication date: 23.05.2013,
    EndNoteCitation

  2. Jakub Stankowski, Tomasz Grajek, Marek Domański,
    Fast watermarking of MPEG-4 AVC/H.264 encoded HDTV video bitstreams,
    29th Picture Coding Symposium, PCS 2012, Kraków, Poland, 7-9 May 2012, pp. 265-268,
    Full textEndNoteCitationDOICited 2 times

  3. Filip Lewandowski, Mateusz Paluszkiewicz, Tomasz Grajek, Krzysztof Wegner,
    Subjective Quality Assessment Methodology for 3D video Compression Technology ,
    International Conference on Signal and Electronics Systems, ICSES 2012, Wrocław, Poland, 18-21 September 2012, pp. 1-5, ISBN: 978-1-4673-1710-8,
    Full textEndNoteCitationDOICited 2 times

  4. Adam Łuczak, Sławomir Maćkowiak, Damian Karwowski, Tomasz Grajek,
    A Large Barrel Distortion in an Acquisition System for Multifocal Images Extraction,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2012, Warsaw, Poland, 24-26 September 2012, pp. 164-171,
    Full textEndNoteCitation

  5. Adam Łuczak, Damian Karwowski, Sławomir Maćkowiak, Tomasz Grajek,
    Diamond scanning order of image blocks for massively parallel HEVC compression,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2012, Warsaw, Poland, 24-26 September 2012, pp. 172-179,
    Full textEndNoteCitation

  6. Tomasz Grajek, Damian Karwowski, Adam Łuczak, Sławomir Maćkowiak, Marek Domański,
    Architecture of Algorithmically Optimized MPEG-4 AVC/H.264 Video Encoder,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2012, Warsaw, Poland, 24-26 September 2012, pp. 79-86,
    Full textEndNoteCitationCited 2 times

2011

  1. Marek Domański, Tomasz Grajek, Damian Karwowski, Krzysztof Klimaszewski, Jacek Konieczny, Maciej Kurc, Adam Łuczak, Robert Ratajczak, Jakub Siast, Olgierd Stankiewicz, Jakub Stankowski, Krzysztof Wegner,
    Multiview HEVC – experimental results,
    Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, MPEG 2011 / M22147, Geneva, Switzerland, 28 November - 02 December 2011,
    Full textEndNoteCitationCited 1 times

2010

  1. Tomasz Grajek,
    Modelowanie zaawansowanych koderów wizyjnych,
    PhD Dissertation at Poznan University of Technology, Faculty of Electronics and Telecommunications, 2010,
    Supervisor: prof. dr hab. inż. Marek Domański, Reviewers: prof. dr hab. inż. Władysław Skarbek, prof. dr hab. inż. Ryszard Stasiński,
    Abstract (pol)Full text (pol)EndNoteCitation

  2. Tomasz Grajek, Marek Domański,
    New model of MPEG-4 AVC/H.264 video encoders,
    4th Microwave and Radar Week, Hong Kong, China, 26-29 September 2010,
    Full textEndNoteCitation

  3. Tomasz Grajek, Marek Domański,
    New model of MPEG-4 AVC/H.264 video encoders,
    17th International Conference on Image Processing, ICIP 2010, Hong Kong, 26-29 September 2010, pp. 961-964, ISBN: 978-1-4244-7992-4,
    Full textEndNoteCitationDOI

  4. Tomasz Grajek, Marek Domański,
    Single Frame Rate-Quantization Model for MPEG-4 AVC/H.264 Video Encoders,
    Lecture Notes in Computer Science, Proceedings of International Conference on Computer Vision and Graphics ICCVG 2010, Springer-Verlag, 20-22 September 2010, pp. 25-32,
    Full textEndNoteCitation

2009

  1. Tomasz Grajek, Marek Domański,
    A global model of AVC/H.264 video encoders,
    27th Picture Coding Symposium, PCS 2009, Chicago, USA, 6-8 May 2009, pp. 1-4,
    Full textEndNoteCitationDOI

2008

  1. Tomasz Grajek, Marek Domański,
    A Simple Quantitative Model of AVC/H.264 Video Coders,
    International Conference on Computer Vision and Graphics, Warsaw, Poland, 10-12 November 2008,
    Full textEndNoteCitation

2006

  1. Tomasz Dzięcielewski, Tomasz Grajek, Jarosław Marek,
    Eksperymentalna analiza efektywności trybów kodowania międzyobrazowego w zaawansowanym koderze wizyjnym,
    Krajowa Konferencja Radiokomunikacji, Radiofonii i Telewizji, KKRRiT 2006, Poznań, Poland, 7-9 czerwca 2006, pp. 219-222,
    Full textEndNoteCitation

2005

  1. Tomasz Dzięcielewski, Tomasz Grajek, Jarosław Marek,
    Eksperymentalna analiza częstotliwości wyboru trybów zaawansowanego kodowania wizyjnego,
    X Poznańskie Warsztaty Telekomunikacyjne, PWT 2005, Poznań, Poland, 8-9 grudnia 2005, pp. 115-120,
    Full textEndNoteCitation

  2. Tomasz Grajek, Damian Karwowski,
    Złożoność obliczeniowa i efektywność kodowania entropijnego w standardzie H.264/AVC,
    Krajowa Konferencja Radiokomunikacji, Radiofonii i Telewizji, KKRRiT 2005, Kraków, Poland, 15-17 czerwca 2005, pp. 377-380,
    Full textEndNoteCitation