Wilfried Karel

Projektass. Dipl.-Ing.


Research Group:
Photogrammetry

Address:
Gußhausstr. 27-29 / E120 (CC0319)
Wien, 1040
Phone #:
+43 (1) 58801 - 12244
Fax #:
+43 (1) 58801 - 122 99
Karel Wilfried

Publications

Books and Book Editorships

  1. W. Karel:
    "Creating Architectural Photo Models using Close Range Photogrammetry";
    VDM Verlag Dr. Müller, Saarbrücken, 2008, ISBN: 978-3-639-04294-8; 84 pages.BibTeX, More information


Publications in Scientific Journals

  1. M. Doneus, M. Wieser, G. Verhoeven, W. Karel, M. Fera, N. Pfeifer:
    "Automated Archiving of Archaeological Aerial Images";
    Remote Sensing, 8 (2016), 3; 209:1 - 209:22.BibTeX, More information


  2. N. Pfeifer, G. Mandlburger, J. Otepka, W. Karel:
    "OPALS - A framework for Airborne Laser Scanning data analysis";
    Computers, Environment and Urban Systems, 45 (2014), 125 - 136.BibTeX, More information


  3. M. Wieser, G. Verhoeven, C. Briese, M. Doneus, W. Karel, N. Pfeifer:
    "Cost-effective geocoding with exterior orientation for airborne and terrestrial archaeological photography - possibilities and limitations";
    International Journal of Heritage in the Digital Era (invited), 3 (2014), 1; 97 - 121.BibTeX,


  4. W. Karel, S. Ghuffar, N. Pfeifer:
    "Modelling and Compensating Internal Light Scattering in Time of Flight Range Cameras";
    Photogrammetric Record, 27 (2012), 138; 155 - 174.BibTeX,


  5. W. Karel, S. Niedermayr:
    "Photogrammetrie + Laserscanning = Range imaging";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), 98 (2010), 2; 109 - 115.BibTeX, More information


  6. W. Karel:
    "Range Imaging: 3D-Punktwolken in Echtzeit";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), begutachteter Beitrag, 96 (2008), 1; 12 - 26.BibTeX, More information


  7. M. Hollaus, W. Wagner, C Eberhöfer, W. Karel:
    "Accuracy of large-scale canopy heights derived from LIDAR data under operational constraints in a complex alpine environment";
    ISPRS Journal of Photogrammetry and Remote Sensing, 60 (2006), 323 - 338.BibTeX, More information


  8. K. Kraus, W. Karel, C. Briese, G. Mandlburger:
    "Local Accuracy Measures for Digital Terrain Models";
    Photogrammetric Record (invited), Volume 21 (2006), No. 116; 342 - 354.BibTeX, More information


  9. W. Karel:
    "Erstellung eines photorealistischen 3-D Modells der Kirche San Juan del Hospital in Valencia/Spanien";
    Photogrammetrie, Fernerkundung, Geoinformation (invited), Heft 7 (2005), 544 - 545.BibTeX,


Contributions to Books

  1. N. Pfeifer, D. Lichti, J. Böhm, W. Karel:
    "3D Cameras: Errors, Calibration and Orientation";
    in: "TOF Range-Imaging Cameras", issued by: Fabio Remondino, David Stoppa; Springer, Berlin, Heidelberg, 2013, (invited), ISBN: 9783642275227, 117 - 138.BibTeX, More information


  2. G. Verhoeven, C. Sevara, W. Karel, C. Ressl, M. Doneus, C. Briese:
    "Undistorting the Past: New Techniques for Orthorectifi cation of Archaeological Aerial Frame Imagery";
    in: "Good Practice in Archaeological Diagnostics", Springer, Switzerland, 2013, (invited), ISBN: 978-3-319-01783-9, 31 - 67.BibTeX, More information


Contributions to Proceedings

  1. J. Otepka, G. Mandlburger, W. Karel, B. Wöhrer:
    "Verteilte Prozessierung von ALS-Daten mittels Cloud-Computing - Erste Ergebnisse einer Pilotstudie";
    in: "16. Internationale geodätische Woche Obergurgl 2011", Herbert Wichmann, 2011, 8 pages.BibTeX,


  2. K. Kraus, W. Karel:
    "Quality Parameters of DTMs";
    in: "Checking and Improving of Digital Terrain Models / Reliability of Direct Georeferencing, Official Publication No 51", issued by: European Ppatial Data Research (EuroSDR); European Spatial Data Research (EuroSDR), 2006, (invited), ISBN: 9789051794915, 125 - 139.BibTeX, More information


Talks and Poster Presentations (with Proceedings-Entry)

  1. L. Piermattei, C. Bozzi, A. Mancini, A. Tassetti, W. Karel, N. Pfeifer:
    "Multispectral data processing from unmanned aerial vehicles: application in precision agriculture using different sensors and platforms";
    Talk: European Geosciences Union, General Assembly 2017 (EGU 2017), Wien; 2017-04-23 - 2017-04-28; in: "Geophysical Research Abstracts", Copernicus, Vol. 19 (2017), ISSN: 1029-7006; EGU2017-13944.BibTeX,


  2. M. Gerke, F. Nex, F. Remondino, K. Jacobsen, J. Kremer, W. Karel, H. Hu, W. Ostrowski:
    "Orientation of Oblique Airborne Image Sets - Experiences From The ISPRS/EUROSDR Benchmark on Multi-Platform Photogrammetry";
    Talk: XXIII ISPRS Congress, Prague, Czechia; 2016-07-12 - 2016-07-19; in: "International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences", International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLI-B1 (2016), ISSN: 1682-1750; 185 - 191.BibTeX, More information


  3. W. Karel, C. Ressl, N. Pfeifer:
    "Efficient orientation and calibration of large aerial blocks of multi-camera platforms";
    Talk: XXIII ISPRS Congress, Prague, Czechia; 2016-07-12 - 2016-07-19; in: "International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences", International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLI-B1 (2016), ISSN: 1682-1750; 199 - 204.BibTeX, More information


  4. M. Milenkovic, W. Karel, C. Ressl, N. Pfeifer:
    "A comparison of UAV and TLS data for soil roughness assessment";
    Talk: XXIII ISPRS Congress, Prague, Czechia; 2016-07-12 - 2016-07-19; in: "ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences", ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, III-5 (2016), ISSN: 2194-9042; 145 - 152.BibTeX, More information


  5. L. Piermattei, W. Karel, A. Vettore, N. Pfeifer:
    "Panorama Image Sets for Photogrammetric Terrestrial Surveys";
    Poster: XXIII ISPRS Congress, Prague, Czechia; 2016-07-12 - 2016-07-19; in: "ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences", ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, III-5 (2016), ISSN: 2194-9042; 159 - 166.BibTeX, More information


  6. L. Piermattei, W. Karel, A. Vettore, N. Pfeifer:
    "Acquisition strategies for terrestrial photogrammetric surveys";
    Talk: European Geosciences Union, General Assembly 2016 (EGU 2016), Wien; 2016-04-17 - 2016-04-22; in: "Geophysical Research Abstracts", Geophysical Research Abstracts, Volume 18 (2016), ISSN: 1607-7962; EGU2016-1111.BibTeX,


  7. G. Verhoeven, W. Karel, S. Stuhec, M. Doneus, I. Trinks, N. Pfeifer:
    "Mind your grey tones - examining the influence of decolourization methods on interest point extraction and matching for architectural image-based modelling";
    Talk: 3D-ARCH'2015 - 3D Virtual Reconstruction and Visualization of Complex Architectures, Avila, Spain; 2015-02-25 - 2015-02-27; in: "Proceedings of 3D-Arch 2015 - 3D Virtual Reconstruction and Visualization of Complex Architectures (ISPRS Archives XL-5/W4)", D. González-Aguilera, F. Remondino, J. Boehm, T. Kersten, T. Fuse (ed.); ISPRS Archives, XL-5/W4 (2015), ISSN: 2194-9034; 307 - 314.BibTeX, More information


  8. Y. Chen, C. Briese, W. Karel, N. Pfeifer:
    "True Ortophoto Generation Using Multi-View Aerial Images";
    Poster: ISPRS Technical Commission III Symposium, Zurich, Switzerland; 2014-09-05 - 2014-09-07; in: "ISPRS Technical Commission III Symposium", K. Schindler, N. Paparoditis (ed.); The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XL-3 (2014), 5 pages.BibTeX, More information


  9. W. Karel, M. Doneus, C. Briese, G. Verhoeven, N. Pfeifer:
    "Investigation on the Automatic Geo-Referencing of Archaeological UAV Photographs by Correlation with Pre-Existing Ortho-Photos";
    Talk: ISPRS Technical Commission V Symposium (2014), Riva del Garda, Italy; 2014-06-23 - 2014-06-25; in: "ISPRS Technical Commission V Symposium (Volume XL-5)", F. Remondino, F. Menna (ed.); The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XL-5 (2014), ISSN: 1682-1750; 307 - 312.BibTeX, More information


  10. M. Hollaus, L. Eysn, W. Karel, N. Pfeifer:
    "Growing stock change estimation using Airborne Laser Scanning data";
    Talk: 13th International Conference on LiDAR Applications for Assessing Forest Ecosystems (SilviLaser 2013), Beijing, China; 2013-10-09 - 2013-10-11; in: "Proceedings of SilviLaser 2013", (2013).BibTeX,


  11. W. Karel, M. Doneus, G. Verhoeven, C. Briese, C. Ressl, N. Pfeifer:
    "Oriental - Automatic geo-referencing and ortho-rectification of archeological aerial photographs";
    Poster: International Symposium of CIPA, Strasbourg, France; 2013-09-02 - 2013-09-06; in: "ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences", II-5/W1 (2013), 5 pages.BibTeX, More information


  12. M. Doneus, G. Verhoeven, W. Karel, C. Briese, N. Pfeifer, C. Ressl:
    "Towards an automated georeferencing and orthorectification of archaeological aerial photographs";
    Poster: 10th International Conference on Archaeological Prospection Austrian Academy of Sciences, Vienna, Wien; 2013-05-29 - 2013-06-02; in: "Archaeological prospection. Proceedings of the 10th International Conference on Archaeological Prospection", (2013), 380 - 382.BibTeX,


  13. M. Milenkovic, L. Eysn, M. Hollaus, W. Karel, N. Pfeifer:
    "Modeling the tree branch structure at very high resolution";
    Talk: SilviLaser 2012, Vancouver, British Columbia, Canada; 2012-09-16 - 2012-09-19; in: "SilviLaser 2012 - Conference Proceedings", (2012), Paper ID SL2012-099, 8 pages.BibTeX,


  14. J. Otepka, G. Mandlburger, W. Karel:
    "The OPALS Data Manager - Efficient Data Management for Processing Large Airborne Laser Scanning Projects";
    Talk: XXII ISPRS Congress, Melbourne; 2012-08-25 - 2012-09-01; in: "ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (ISPRS Annals)", Comm. III, Volume 1-3 (2012), ISSN: 2194-9042; 153 - 159.BibTeX,


  15. G. Mandlburger, J. Otepka, W. Karel, M. Hollaus, C. Ressl, A. Haring, C. Briese, G. Molnár, B. Höfle:
    "OPALS - a comprehensive laser scanning software for geomorphological analysis";
    Talk: EGU 2011, Vienna; 2011-04-03 - 2011-04-08; in: "Geophysical Research Abstracts", 13 (2011), Paper ID EGU2011-7933, 1 pages.BibTeX,


  16. G. Mandlburger, J. Otepka, W. Karel, B. Wöhrer, W. Wagner, N. Pfeifer:
    "OPALS (Orientation and Processing of Airborne Laser Scanning data) - Konzept und Anwendungsbeispiele einer wissenschaftlichen Laserscanning Software";
    Talk: Dreiländertagung - 30. Wissenschaftlich-Technische Jahrestagung der DGPF, Wien; 2010-07-01 - 2010-07-03; in: "Publikationen der Deutschen Gesellschaft für Photogrammetrie, Fernerkundung und Geoinformation e.V.", Band 19 (2010), ISSN: 0942-2870; 376 - 387.BibTeX,


  17. W. Karel, S. Ghuffar, N. Pfeifer:
    "Quantifying The Distortion Of Distance Observations Caused By Scattering In Time-Of-Flight Range Cameras";
    Talk: ISPRS Commission V Mid-Term Symposium Close Range Image Measurement Techniques, Newcastle; 2010-06-21 - 2010-06-24; in: "The International Archives Of The Photogrammetry, Remote Sensing And Spatial Information Sciences", XXXVIII/5 (2010), ISSN: 1682-1777; 316 - 321.BibTeX,


  18. G. Mandlburger, J. Otepka, W. Karel, W. Wagner, N. Pfeifer:
    "Orientation And Processing Of Airborne Laser Scanning Data (OPALS) - Concept And First Results Of A Comprehensive Als Software";
    Poster: Laserscanning 2009, Paris; 2009-09-01 - 2009-09-02; in: "ISPRS Workshop Laserscanning `09", IAPRS, Vol. XXXVIII, Part 3/W8 (2009), ISSN: 1682-1750; 55 - 60.BibTeX,


  19. N. Pfeifer, C. Ressl, W. Karel:
    "Range calibration for terrestrial laser scanners and range cameras";
    Keynote Lecture: SPIE: Optics + Photonics 2009, San Diego, CA, USA (invited); 2009-08-02 - 2009-08-03; in: "SPIE Proceedings Vol. 7447, Videometrics, Range Imaging, and Applications X", Proceedings of SPIE Volume: 7447 (2009), ISBN: 9780819477378; 1 - 15.BibTeX, More information


  20. W. Karel, N. Pfeifer:
    "Range camera calibration based on image sequences and dense comprehensive error statistics";
    Talk: Three-Dimensional Imaging Metrology, San José, USA; 2009-01-19 - 2009-01-20; in: "SPIE Proceedings Vol. 7239, Three-Dimensional Imaging Metrology", (2009), ISBN: 9780819474896; 12 pages.BibTeX, More information


  21. W. Karel:
    "Integrated Range Camera Calibration Using Image Sequences From Hand-Held Operation";
    Talk: International Society for Photogrammetry and Remote Sensing XXIst Congress, Beijing, China; 2008-07-03 - 2008-07-11; in: "Proceedings", Vol. XXXVII. Part B5 (2008), ISSN: 1682-1750; 945 - 951.BibTeX, More information


  22. N. Pfeifer, W. Karel:
    "Aufnahme von 3D-Punktwolken mit hoher zeitlicher Auflösung mittels aktiver Sensoren";
    Keynote Lecture: Oldenburger 3D-Tage 2008, Oldenburg (invited); 2008-01-30 - 2008-01-31; in: "Beiträge der Oldenburger 3D Tage 2008", Wichmann, (2008), ISBN: 3879074631; 2 - 13.BibTeX, More information


  23. W. Karel, P. Dorninger, N. Pfeifer:
    "In Situ Determination Of Range Camera Quality Parameters By Segmentation";
    Talk: International Conference on Optical 3-D Measurement Techniques VIII, Zurich, Switzerland; 2007-07-09 - 2007-07-12; in: "International Conference on Optical 3-D Measurement Techniques VIII", (2007), ISBN: 3-906467-67-8; 109 - 116.BibTeX, More information


  24. W. Karel, N. Pfeifer, C. Briese:
    "Dtm Quality Assessment";
    Talk: ISPRS Technical Commission Symposium, Vienna; 2006-07-12 - 2006-07-14; in: "ISPRS Technical Commission II Symposium 2006", International Archives of the ISPRS, XXXVI/2 (2006), ISSN: 1682-1750; 7 - 12.BibTeX, More information


  25. W. Karel:
    "The Creation of a Photo Model Considering a Refined Theory and Using Multiple Observation Types, and its Visualization together with its Quality Parameters";
    Talk: Optical 3-D Measurement Techniques VII, Wien; 2005-10-03 - 2005-10-05; in: "Optical 3-D Measurement Techniques VII", H. Kahmen, A. Grün (ed.); Research Group of Engineering Geodesy, Institute of Geodesy and Geophysics, TU Vienna, Vol. II (2005), ISBN: 3-9501492-2-8; 263 - 272.BibTeX, More information


  26. W. Karel:
    "Sophisticated Use of Virtual Shapes of Architecture and Visualization of Quality";
    Poster: International Symposium of CIPA, Turin, Italien; 2005-09-26 - 2005-10-01; in: "International Cooperation to Save the World's Cultural Heritage", S. Dequal (ed.); International Archives of Photogrammetry Remote Sensing and Spatial Information Sciences, Vol. XXXVI-5/C34 (2005), ISSN: 1682-1750; 882 - 887.BibTeX, More information


  27. W. Winkler, B. Bogensberger, W. Karel, M. Kistenich, G. Pacher, A. Pany, A. Roncat, G. Summer, J. Böhm, T. Hobiger, R. Weber, H. Schuh:
    "VIEPROJ1 - a students VLBI project";
    Talk: IVS General Meeting, Ottawa, Canada; 2004-02-09 - 2004-09-11; in: "General Meeting Proceedings", General Meeting Proceedings, NASA/CP-2004-212255 (2004), 105 - 108.BibTeX,


Talks and Poster Presentations (without Proceedings-Entry)

  1. G. Verhoeven, W. Karel, M. Doneus, M. Wieser, N. Pfeifer:
    "OrientAL - towards (semi-)automated orthorectification of aerial photographs";
    Talk: Applying digital technology in research on building structures of the Lusatian culture fortified settlement in Biskupin, Site 4, Biskupin, Poland (invited); 2017-05-04 - 2017-05-05.BibTeX,


  2. W. Karel, N. Pfeifer:
    "Analysis of Oblique Image Datasets with OrientAL";
    Talk: EuroSDR/ISPRS Workshop on 'Oblique Cameras and Dense Image Matching', Southampton, UK (invited); 2015-10-19 - 2015-10-20.BibTeX,


  3. G. Mandlburger, M. Hollaus, L. Eysn, W. Mücke, J. Otepka, W. Karel, C. Briese, A. Zlinszky, M. Vetter, T. Melzer, P. Dorninger, N. Pfeifer:
    "3D Punktwolken sind mehr wert ...";
    Talk: VoGIS-Fachforum 2013, Feldkirch (invited); 2013-11-21.BibTeX, More information


  4. A. Grafl, M. Hollaus, L. Eysn, W. Karel, N. Pfeifer:
    "A novel approach for forest road detection based on ALS data and orthophotos";
    Poster: 13th International Conference on LiDAR Applications for Assessing Forest Ecosystems (SilviLaser 2013), Beijing, China; 2013-10-09 - 2013-10-11.BibTeX, More information


  5. N. Pfeifer, W. Karel, S. Ghuffar, C. Ressl:
    "Studying Dynamic Scenes with Time of Flight Cameras";
    Talk: Seminar Fachgebiet Geomatik, Zürich (invited); 2013-04-25.BibTeX,


  6. W. Karel:
    "Geometrische Kalibrierung von Range Cameras";
    Talk: Institut für Photogrammetrie und Geoinformation (IPI) an der Leibniz-Universität Hannover, Hannover (invited); 2013-04-11.BibTeX,


  7. J. Otepka, G. Mandlburger, W. Karel, B. Wöhrer, A. Roncat:
    "Verteilte Prozessierung von ALS-Daten mittels Cloud-Computing - Erste Ergebnisse einer Pilotstudie";
    Talk: 16. Internationale geodätische Woche Obergurgl, Obergurgl; 2011-02-13 - 2011-02-19.BibTeX,


  8. N. Pfeifer, S. Ghuffar, W. Karel, C. Ressl, S. Niedermayr:
    "Range Imaging from Calibration to Modelling";
    Talk: International workshop on Range-Imaging Sensors and Applications, Italien, Trento (invited); 2011-01-27 - 2011-01-28.BibTeX,


  9. W. Karel:
    "Photogrammetrie + Laserscanning = Range Imaging";
    Talk: 10. Österreichischer Geodätentag, Schladming (invited); 2009-10-06 - 2009-10-08.BibTeX, More information


  10. W. Karel:
    "Currículo de Fotogrametría en el Instituto de Fotogrametría y Teledetección (IPF) de Viena, Austria";
    Talk: Reunión Científica de Fotogrametría y Teledetección, niversidad de Salamanca, Ávila, Spanien (invited); 2006-09-06.BibTeX, More information


  11. W. Karel:
    "Erstellung eines photorealistischen 3-D Modells der Kirche San Juan del Hospital in Valencia / Spanien";
    Poster: 25. Wissenschaftlich-TechnisheJahrestagung der Deutschen Gesellschaft für Photogrammetrie und Fernerkundung, Rostock (invited); 2005-09-21 - 2005-09-23.BibTeX, More information


  12. K. Kraus, W. Karel:
    "Quality Parameters of DTMs";
    Talk: EuroSDR, Seminar on "Automated Quality Control of Digital Terrain Models", Aalborg, Dänemark (invited); 2005-08-18 - 2005-08-19.BibTeX,


  13. W. Winkler, B. Bogensberger, W. Karel, M. Kistenich, G. Pacher, A. Pany, A. Roncat, G. Summer, J. Böhm, T. Hobiger, R. Weber, H. Schuh:
    "VIEPROJ1 - a students VLBI project";
    Poster: IVS General Meeting, Ottawa, Canada; 2004-02-09 - 2004-02-11.BibTeX,


Diploma and Master Theses (authored and supervised)

  1. R. Messner:
    "Bündelblockausgleich mit Geraden - ein Vergleich verschiedener Ansätze";
    Supervisor: N. Pfeifer, W. Karel; Department für Geodäsie und Geoinformation, 2016; final examination: 2016-11-21.BibTeX,


  2. S. Horvath:
    "Integration of relative and global orientation methods using a moving ToF camera";
    Supervisor: N. Pfeifer, W. Karel; Department of Geodesy and Geoinformation, Vienna University of Technology, 2014; final examination: 2014-10-20.BibTeX, More information


  3. G. Marx:
    "Radiometrische Kalibrierung von Distanzmesskameras";
    Supervisor: N. Pfeifer, W. Karel; Department für Geodäsie und Geoinformation, 2014; final examination: 2014-01-20.BibTeX, More information


  4. P. Zachhuber:
    "Impact of Temperature and Temperature-Change on Range Cameras";
    Supervisor: N. Pfeifer, W. Karel; Institut für Photogrammetrie und Fernerkundung, 2011; final examination: 2011-10-18.BibTeX, More information


  5. S. Niedermayr:
    "Vervollständigung von Stadtmodellen mittels Distanzkameras";
    Supervisor: W. Karel, N. Pfeifer; Institut für Photogrammetrie und Fernerkundung, 2010.BibTeX, More information


  6. W. Karel:
    "Creation of a Geometrically Exact 3D Photo Model of the Church of San Juan del Hospital in Valencia/Spain";
    Supervisor: K. Kraus, H. Kager, F. Rottensteiner; Institut für Photogrammetrie und Fernerkundung, 2004.BibTeX, More information