Dr. Steffen Gebhardt

Publikationen am Lehrstuhl

(wird an dieser Stelle nicht weiter gepflegt)

Zeitschriftenbeiträge

• Gebhardt, S., T. Wehrmann, J. Huth, I. Schettler, C. Künzer, M. Schmidt and S. Dech. 2009. A Water-related Information System for the Mekong Delta: Data modelling and data management. Computers & Geosciences (submitted)
   
• Franke, J., S. Gebhardt, G. Menz and H.-P. Helfrich. 2009. Geo-statistical analysis of the spatiotemporal dynamics of powdery mildew and leaf rust in wheat. Phytopathology 99(8), 974-984.
   
• Gebhardt, S. and W. Kühbauch. 2007. A new algorithm for automatic Rumex obtusifolius detection in digital images using colour and texture features and the influence of image resolution. Precision Agriculture 8(1-2), 1-13.
   
• Gebhardt, S. and W. Kühbauch. 2006. Image analysis for automatic classification of Rumex obtusifolius in mixed grassland swards. Journal of Plant Diseases and Protection Special Issue XX, 189-195.
   
• Gebhardt, S., J. Schellberg, R. Lock and W. Kühbauch. 2006. Identification of broad-leaved dock (Rumex obtusifolius L.) on grassland by means of digital image processing. Precision Agriculture 7(3), 165-178.

Konferenzbeiträge

2009

• Gebhardt, S., R. Ressl, M. Schmidt and S. Dech. 2009. Geo-statistical analysis of historical fire occurrences based on operational satellite monitoring systems. 29th Annual EARSeL Symposium, Chania, Crete, Greece,15.-18.06.2009.
• Heege, T., V. Kiselev, S. Gebhardt, J. Huth, T. T. Long and V. K. Tri. 2009. Processing of Multiple Sensor Images of Aquatic Systems. 33rd International Symposium on Remote Sensing of Environment, Stresa, Italy,4.-8.05.2009.
• Huth, J., S. Gebhardt, T. Wehrmann, I. Schettler, C. Künzer, M. Schmidt and S. Dech. 2009. Automated inundation monitoring using TerraSAR-X multi-temporal imagery. European Geosciences Union General Assembly 2009, Vienna, Austria,19.04.-24.04.2009.
• Schettler, I., S. Gebhardt, T. Wehrmann, J. Huth and C. Künzer. 2009. Das WISDOM-Projekt - Entwicklung eines wasserbezogenen Informationssystems zur Unterstützung des Wasser- und Ressourcenmanagements im Mekong Delta. DWA-Tagung - GIS in der Wasserwirtschaft, Kassel, Germany,21.-22.01.09.

2008

• Gebhardt, S. and J. Huth. 2008. Simple image processing techniques for near-real time inundation monitoring using TerraSAR-X imagery. 3. TerraSAR-X Science Team Meeting, Oberpfaffenhofen, Germany,25.-26.11.2008.
• Gebhardt, S., C. Künzer, J. Huth, T. Wehrmann, I. Schettler and M. Schmidt. 2008. The WISDOM Project - A Water-related Information System for the Mekong Delta, Vietnam: first results of remote sensing. 13th World Water Congress, Montpellier, France,01.-04.09.2008.
• Schettler, I., T. Wehrmann, P. T. Vinh, S. Gebhardt, J. Huth and C. Künzer. 2008. WISDOM - multidisciplinary information system in the water related context. GISpro Conference, Ho Chi Minh City, Viet Nam,21.-23.10.2008.
• Wehrmann, T., T. T. Binh, S. Gebhardt, J. Huth, C. Künzer, L. D. Nguyen, I. Schettler, M. Schmidt and S. Dech. 2008. WISDOM demostration module - open source technology managing water related, spatial information. GIS IDEAS Conference, Hanoi, Viet Nam,04.-06.12.2008.

2007

• Dicke, D. and S. Gebhardt. 2007. Testing decision rules for sowing and nitrogen fertilizer application of cereals, at sites of high soil variability - a GIS approach for on-farm research. 6th European Conference on Precision Agriculture, Skiathos, Greece,3-6 June, 2007.
• Gebhardt, S. and W. Kuhbauch. 2007. Continous mapping of Rumex obtusifolius over different growing periods based on automatic image classification and GIS-based post-processing. 6th European Conference on Precision Agriculture, Skiathos, Greece,3-6 June, 2007.

2006

• Gebhardt, S. and W. Kühbauch. 2006. Image classification approach for automatic identification of grassland weeds. Remote Sensing and Modeling of Ecosystems for Sustainability III, San Diego, CA, USA,13.08.-17.08. SPIE.
• Gebhardt, S. and W. Kühbauch. 2006. Automatic detection of Rumex obtusifolius by digital imaging. 21st General Meeting of the European Grassland Federation, Badajoz, Spain,03.04.-06.04.2006 Organizing Committee of the 21st General Meeting of the European Grassland Federation.
• Gebhardt, S. and W. Kühbauch. 2006. Automatische Detektion und Kartierung von Stumpfblättrigem Ampfer (Rumex obtusifolius L) mit digitaler Kameratechnik und Bildkonversion. 50. Jahrestagung der Arbeitsgemeinschaft Grünland und Futterbau (AGGF), Straubing, Germany,24.08.-26.08.2005 LfL.
• Gebhardt, S. and W. Kühbauch. 2006. Ein bildanalytischer Ansatz zur Ampferdetektion. 12. Workshop Computer-Bildanalyse in der Landwirtschaft, Bonn, Germany.

2005

• Gebhardt, S. and W. Kühbauch. 2005. Chancen der Ampfererkennung mittels digitaler Bildverarbeitung. 49. Jahrestagung der Arbeitsgemeinschaft Grünland und Futterbau (AGGF), Bad-Elster, Germany,25.08.-27.08.2005.
• Gebhardt, S. and W. Kühbauch. 2005. Untersuchungen zur Unkrauterkennung im Grünland mittels digitaler Bildverarbeitung. 11. Workshop Computer-Bildanalyse in der Landwirtschaft, Potsdam-Bornim, Germany,10.05.2005.