Publications

Book Chapters

• Machine Learning in Remote Sensing
  Hänsch, R., Handbook of Pattern Recognition and Computer Vision, Chi Hau Chen (Ed.), World Scientific, April 2020.
• Random Forests
  Hänsch, R. and Hellwich, O., Handbuch der Geodäsie, Freeden, W. and Rummel, R. (Ed.), Springer Verlag, July 2016.
• Object Recognition from Polarimetric SAR Images
  Hänsch, R. and Hellwich, O., Radar Remote Sensing of Urban Areas (Remote Sensing and Digital Image Processing), Uwe Soergel (Ed.), Springer Verlag, March 2010.

Conference and journal articles - 2019

	Advanced Multi-Sensor Optical Remote Sensing for Urban Land Use and Land Cover Classification: Outcome of the 2018 IEEE GRSS Data Fusion Contest Yonghao Xu, Bo Du, Liangpei Zhang, Daniele Cerra, Miguel Pato, Emiliano Carmona, Saurabh Prasad, Naoto Yokoya, R. Hänsch, and Bertrand Le Saux, IEEE Journal of selected topics in applied Earth Observations and Remote Sensing. Link     Paper     bibtex @article{dfc18outcome,     title={Advanced Multi-Sensor Optical Remote Sensing for Urban Land Use and Land Cover Classification: Outcome of the 2018 IEEE GRSS Data Fusion Contest},     author={Yonghao Xu, Bo Du, Liangpei Zhang, Daniele Cerra, Miguel Pato, Emiliano Carmona, Saurabh Prasad, Naoto Yokoya, R. H{\"}nsch, and Bertrand Le Saux},     journal={IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},     year={2019},     volume={12},     issue={6},     pages={1709-1724} }
	2019 IEEE GRSS Data Fusion Contest: Large-Scale Semantic 3D Reconstruction Bertrand Le Saux, Naoto Yokoya, Ronny Hänsch, Myron Brown, Greg Hager, HakJae Kim, IEEE Geoscience and Remote Sensing Magazine. Link     Paper     bibtex @article{,     title={2019 Data Fusion Contest [Technical Committees]},     author={Le Saux, Bertrand and Yokoya, Naoto and H{\"a}nsch, Ronny and Brown, Myron and Hager, Greg and Kim, HakJae},     journal={IEEE Geoscience and Remote Sensing Magazine},     year={2019},     volume={7},     issue={1},     pages={103-105} }
	A Digital Image Processing Pipeline for Modelling of Realistic Noise in Synthetic Images O. Bielova, R. Hänsch, A. Ley, O. HellwichThe IEEE Conference on Computer Vision and Pattern Recognition (CVPR) Workshops. Link     Paper     bibtex @inproceedings{haensch2019syb3rnoise,     title={A Digital Image Processing Pipeline for Modelling of Realistic Noise in Synthetic Images},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={},     volume={},     number={},     pages={},     year={2019},     month={June},     publisher={IEEE},     organization={},     doi={},     issn={}, }
	Random Forests based Image Colorization Helge Mohn, Mark Gaebelein, Ronny Hänsch and Olaf Hellwich, Communications in Computer and Information Science. Link     Paper     bibtex @article{haensch2019rfcol,     title={Random Forests based Image Colorization},     author={Mohn, Helge and Gaebelein, Mark and H{\"a}nsch, Ronny and Hellwich, Olaf},     journal={Communications in Computer and Information Science},     year={2019},     volume={},     issue={},     pages={} }
	Online Random Forests for Urban Area Classification from Polarimetric SAR Images R. Hänsch and Olaf Hellwich, JURSE 2019.. Link     Paper     bibtex @inproceedings{haensch2019orf,     title={Online Random Forests for Urban Area Classification from Polarimetric SAR Images},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={Proceedings of the Joint Urban Remote Sensing Event 2019},     volume={},     number={},     pages={},     year={2019},     month={May},     publisher={IEEE},     organization={},     doi={},     issn={}, }
	Colorful Trees: Visualizing Random Forests for Analysis and Interpretation R. Hänsch, P. Wiesner, S. Wendler, O. Hellwich, WACV 2019.. Link     Paper     Project page     bibtex @inproceedings{haensch2019rfvis,     title={Colorful Trees: Visualizing Random Forests for Analysis and Interpretation},     author={H{\"a}nsch, Ronny and Wiesner, Philipp and Wendler, Sophie and Hellwich, Olaf},     booktitle={2019 IEEE Winter Conference on Applications of Computer Vision (WACV)},     volume={},     number={},     pages={294-302},     year={2019},     month={01},     publisher={IEEE},     organization={},     doi={10.1109/WACV.2019.00037},     issn={1550-5790}, }

2018

	Exploiting SAR Tomography for Supervised Land-Cover Classification O. D’Hondt, R. Hänsch, N. Wagener, O. Hellwich, Remote Sensing, 2018, 10(11), 1742.. Link     Paper     bibtex @article{dhondt2018tomoclass,     title={Exploiting SAR Tomography for Supervised Land-Cover Classification},     author={D'Hondt, Olivier and H{\"a}nsch, Ronny and Wagener, Nicolas and Hellwich, Olaf},     journal={Remote Sensing},     volume={10},     number={11},     pages={1--18},     year={2018},     month={07},     publisher={IEEE},     organization={},     doi={10.3390/rs10111742},     issn={2072-4292}, }
	Report on the 2018 IEEE GRSS Data Fusion Contest - Advanced Multisource Optical Remote Sensing for Urban Land Use and Land Cover Classification B. Le Saux, N. Yokoya, R. Hänsch, S. Prasad, IEEE Geoscience and Remote Sensing Magazine. Link     Paper     bibtex @article{LeSaux2018,     title={Advanced Multisource Optical Remote Sensing for Urban Land Use and Land Cover Classification},     author={Le Saux,Bertrand and Yokoya, Naoto and H{\"a}nsch, Ronny and Prasad, Saurabh},     journal={IEEE Geoscience and Remote Sensing Magazine},     year={2018},     volume={6},     issue={4},     pages={85-89} }
	Machine learning methods for remote sensing applications: an overview K. Schulz, R. Hänsch, U. Sörgel, SPIE Remote Sensing 2018 Berlin, Germany, September 2018. Link     bibtex @inproceedings{schulz2018mloverview,     title = {Machine learning methods for remote sensing applications: an overview},     author={Schulz, Karsten and H{\"a}nsch, Ronny and S{\"o}rgel, Uwe},     booktitle={Proc. SPIE 10790, Earth Resources and Environmental Remote Sensing/GIS Applications IX},     volume={10790},     pages={},     year={2018},     month={},     publisher={},     organization={SPIE},     doi = {10.1117/12.2503653},     issn={}, }
	A comparative evaluation of polarimetric distance measures within the Random Forest framework for the classification of PolSAR images R. Hänsch, O. Hellwich, IGARSS 2018 Valencia, Spain, July 2018. Link     bibtex @inproceedings{haensch2018poldist,     title={A Comparative Evaluation of Polarimetric Distance Measures within the Random Forest Framework for the Classification of Polsar Images},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium},     volume={},     pages={8440-8443},     year={2018},     month={07},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2018.8518834},     ISSN={2153-7003}, }
	Feature Design for Classification from TomoSAR data O. D’Hondt, R. Hänsch, O. Hellwich, IGARSS 2018 Valencia, Spain, July 2018. Link     bibtex @inproceedings{dhondt2018tomofeature,     title={Feature Design for Classification from TomoSAR Data},     author={D'Hondt, Olivier and H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium},     volume={},     pages={6739--6742},     year={2018},     month={07},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2018.8519060},     issn={2153-7003}, }
	Classification of Icon Type and Cooldown State in Video Game Replays J. Eichelbaum, R. Hänsch, O. Hellwich, ICIAR 2018 Póvoa de Varzim, Portugal, June 2018. Link     Paper     bibtex @inproceedings{eichelbaum2018esports,     author={Eichelbaum, Jeremias and H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Classification of Icon Type and Cooldown State in Video Game Replays},     booktitle={ICIAR 2018; International Conference Image Analysis and Recognition},     volume={},     year={2018},     month={06}     pages={227--234},     publisher={Springer},     organization={},     doi={10.1007/978-3-319-93000-8_26},     isbn={978-3-319-93000-8}, }
	Supervised classification from TomoSAR data O. D’Hondt, R. Hänsch, O. Hellwich, EUSAR 2018 Aachen, Germany, June 2018. Link     bibtex @inproceedings{dhondt2018tomosar,     title={Supervised classification from TomoSAR data},     author={D'Hondt, Olivier and H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={EUSAR 2018; 12th European Conference on Synthetic Aperture Radar},     pages={1181 --1184},     year={2018},     month={06},     publisher={VDE},     organization={},     doi={},     isbn={978-3-8007-4636-1}, }
	Exploiting GAN-Based SAR to Optical Image Transcoding for Improved Classification via Deep Learning A. Ley, O. D’Hondt, S. Valade, R. Hänsch, O. Hellwich, EUSAR 2018 Aachen, Germany, June 2018. Link     bibtex @inproceedings{ley2018gansar,     author={Ley, Andreas and Dhondt, Olivier and Valade, Sebastien and H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Exploiting GAN-Based SAR to Optical Image Transcoding for Improved Classification via Deep Learning},     booktitle={EUSAR 2018; 12th European Conference on Synthetic Aperture Radar},     year={2018},     month={06},     pages={396--401},     publisher={VDE},     organization={},     doi={},     isbn={978-3-8007-4636-1}, }
	Faster Trees: Strategies for accelerated training and prediction of Random Forests for classification of PolSAR images R. Hänsch, O. Hellwich, ISPRS TCIII Midterm 2018 Beijing, China, May 2018. Link     Paper     bibtex @article{haensch2018fastertrees,     author={H\"ansch, R. and Hellwich, O.},     title={Faster Trees: Strategies for Accelerated Training and Prediction of Random Forests for Classification of Polsar Images},     journal = {ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences},     year = {2018},     month = {04},     pages = {105-112},     volume = {4-3},     doi={10.5194/isprs-annals-IV-3-105-2018},     issn={2194-9042},     publisher={Copernicus Publications}, }
	2018 IEEE GRSS Data Fusion Contest: Multi-modal land use classification B. Le Saux, N. Yokoya, R. Hänsch, S. Prasad, IEEE Geoscience and Remote Sensing Magazine. Link     Paper     bibtex @article{saux2018dfcannounce,     author={B. Le Saux and N. Yokoya and R. H{\"a}nsch and S. Prasad},     journal={IEEE Geoscience and Remote Sensing Magazine},     title={2018 IEEE GRSS Data Fusion Contest: Multimodal Land Use Classification [Technical Committees]},     year={2018},     volume={6},     number={1},     pages={52--54},     publisher={IEEE},     doi={10.1109/MGRS.2018.2798161},     issn={2168-6831},     month={03}, }
	Classification of PolSAR Images by Stacked Random Forests R. Hänsch, O. Hellwich, ISPRS International Journal of Geo-Information. Link     Paper     bibtex @article{haensch2018stackedrf,     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Classification of PolSAR Images by Stacked Random Forests},     journal={ISPRS International Journal of Geo-Information},     volume={7},     number={2},     year={2018},     month={02}     pages={74--90},     publisher={MDPI},     doi={10.3390/ijgi7020074},     issn={2220-9964}, }
	Towards Image Colorization with Random Forests H. Mohn, M. Gaebelein, R. Hänsch, O. Hellwich, VISAPP 2018 Funchal, Portugal, January 2018. Link     Paper     bibtex @inproceedings{mohn2018towards,     author={Mohn, Helge and Gaebelein, Mark and H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Towards Image Colorization with Random Forests.},     booktitle={VISAPP; 13th International Conference on Computer Vision Theory and Applications},     volume={4},     year={2018},     month={01},     pages={270--278},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0006570002700278},     isbn={978-989-758-290-5}, }
	Leveraging the Spatial Label Structure for Semantic Image Labeling using Random Forests M. Wöllhaf, R. Hänsch, O. Hellwich, VISAPP 2018 Funchal, Portugal, January 2018. Link     Paper     Project page     bibtex @inproceedings{mohn2018towards,     author={W{\"o}llhaf, Manuel and H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Leveraging the Spatial Label Structure for Semantic Image Labeling using Random Forests.},     booktitle={VISAPP; 13th International Conference on Computer Vision Theory and Applications},     volume={5},     year={2018},     month={01},     pages={193--200},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0006546801930200},     isbn={978-989-758-290-5}, }

2017

	Skipping the real world: Classification of PolSAR images without explicit feature extraction R. Hänsch, O. Hellwich, ISPRS Journal of Photogrammetry and Remote Sensing. Link     Paper     bibtex @article{hansch2018skipping,     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Skipping the real world: Classification of PolSAR images without explicit feature extraction},     journal={ISPRS Journal of Photogrammetry and Remote Sensing},     volume={140},     number={},     year={2017},     month={11}     pages={122--132},     publisher={Elsevier},     doi={10.1016/j.isprsjprs.2017.11.022},     issn={0924-2716}, }
	Automatic Building Abstraction from Aerial Photogrammetry A. Ley, R. Hänsch, O. Hellwich, PhotoGA 2017 Wuhan, China, September 2017. Link     Paper     bibtex @article{ley2017automatic,     author={Ley, Andreas and H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Automatic Building Abstraction from Aerial Photogrammetry},     journal={ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences},     volume={4-2/W4},     year={2017},     month={09}     pages = {243-250},     publisher={Copernicus Publications},     doi={10.5194/isprs-annals-IV-2-W4-243-2017},     issn={2194-9042}, }
	Camera Based Detection of Pedestrians using Genetic Optimized Hough Forests M. Iwanczik, H. Türmer, R. Hänsch, A. Dehghani, FAST-zero '17 Nara, Japan, September 2017. bibtex @inproceedings{iwanczik2017hf,     author={Iwanczik, Matthias and T{\"u}rmer, Henry and H{\"a}nsch, Ronny and Dehghani, Anoushirvan},     title={Camera Based Detection of Pedestrians using Genetic Optimized Hough Forests},     booktitle={Proceedings of the 4th International Symposium on Future Active Safety Technology towards Zero-Traffic-Accidents (FAST-zero)},     volume={},     pages={},     year={2017},     month={},     publisher={JSAE},     organization={JSAE},     doi={},     ISSN={}, }
	Correct and still wrong: The relationship between sampling strategies and the estimation of the generalization error R. Hänsch, A. Ley, O. Hellwich, IGARSS 2017 Fort Worth, Texas, USA, July 2017. Link     bibtex @inproceedings{haensch2017correct,     title={Correct and still wrong: The relationship between sampling strategies and the estimation of the generalization error},     author={R. H{\"a}nsch and A. Ley and O. Hellwich},     booktitle={2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)},     volume={},     pages={3672--3675},     year={2017},     month={07},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2017.8127795},     ISSN={2153-7003}, }
	Near Real-time Object Detection in RGBD Data R. Hänsch, S. Kaiser, O. Hellwich, VISAPP 2017 Porto, Portugal, February 2017. Link     Paper     bibtex @inproceedings{hansch2017realtime3d,     title={Near Real-time Object Detection in RGBD Data.},     author={H{\"a}nsch, Ronny and Kaiser, Stefan and Hellwich, Olaf},     booktitle={Proceedings of the 12th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (5: VISAPP)},     volume={5},     pages={179--186},     year={2017},     month={02},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0006101401790186},     isbn={978-989-758-226-4}, }
	Specularity, Shadow, and Occlusion Removal for Planar Objects in Stereo Case I. Nurutdinova, R. Hänsch, V. Mühler, S. Bourou, A.I. Papadaki, O. Hellwich, VISAPP 2017 Porto, Portugal, February 2017. Link     Paper     bibtex @inproceedings{nurutdinova2017specularity,     title={Specularity, Shadow, and Occlusion Removal for Planar Objects in Stereo Case.},     author={Nurutdinova, Irina and H{\"a}nsch, Ronny and M{\"u}hler, Vincent and Bourou, Stavroula and Papadaki, Alexandra I and Hellwich, Olaf},     booktitle={VISAPP; 12th International Conference on Computer Vision Theory and Applications},     volume={4},     pages={98--106},     year={2017},     month={02},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0006166100980106},     isbn={978-989-758-225-7}, }

2016

	SyB3R: A Realistic Synthetic Benchmark for 3D Reconstruction from Images A. Ley, R. Hänsch, O. Hellwich, ECCV 2016, Vol. VII, pp. 236-251, October 2016. Link     Paper     bibtex @inproceedings{ley2016syb3r,     title={SyB3R: A Realistic Synthetic Benchmark for 3D Reconstruction from Images},     author={Ley, Andreas and H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={ECCV 2016; European Conference on Computer Vision},     volume={},     pages={236--251},     year={2016},     month={10},     organization={},     publisher={Springer},     doi={10.1007/978-3-319-46448-0},     isbn={978-3-319-46447-3},     issn={0302-9743} }
	Task-dependent Band-Selection of Hyperspectral Images by Projection-Based Random Forests R. Hänsch, O. Hellwich, ISPRS 2016, Vol. III-7, pp. 263-270, July 2016. Link     Paper     bibtex @article{haensch2016task,     title={Task-Dependent Band-Selection of Hyperspectral Images by Project-Based Random Forests},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     journal={ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences},     volume={3-7},     year={2016},     month={07},     pages={263--270},     publisher={Copernicus Publications},     doi={10.5194/isprsannals-III-7-263-2016},     issn={2194-904}, }
	Modern Methods of Bundle Adjustment on the GPU R. Hänsch, I. Drude, O. Hellwich, ISPRS 2016, Vol. III-3, pp. 43-50, July 2016. Link     Paper     bibtex @article{haensch2016bagpu,     title={Modern Methods of Bundle Adjustment on the GPU},     author={H{\"a}nsch, Ronny and Drude, I and Hellwich, Olaf},     journal={ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences},     volume={3-3},     year={2016},     month={07},     pages={43--50},     publisher={Copernicus Publications},     doi={10.5194/isprsannals-III-3-43-2016},     issn={2194-904}, }
	Reconstructing White Walls: Multi-View, Multi-Shot 3D Reconstruction of Textureless Surfaces A. Ley, R. Hänsch, O. Hellwich, ISPRS 2016, Vol. III-3, pp. 91-98, July 2016. Link     Paper     bibtex @article{ley2016reconstructing,     title={Reconstructing White Walls: Multi-View, Multi-Shot 3D Reconstuction of Textureless Surfaces},     author={Ley, Andreas and H{\"a}nsch, Ronny and Hellwich, Olaf},     journal={ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences},     volume={3-3},     year={2016},     month={07},     pages={91--98},     publisher={Copernicus Publications},     doi={10.5194/isprs-annals-III-3-91-2016},     issn={2194-904}, }
	Machine-Learning based detection of corresponding interest points in optical and SAR images R. Hänsch, O. Hellwich, IGARSS 2016, pp. 1492-1495, July 2016. Link     bibtex @inproceedings{hansch2016machine,     title={Machine-learning based detection of corresponding interest points in optical and SAR images},     author={H{\"a}nsch, Ronny and Hellwich, Olaf and Tu, Xiaohong},     booktitle={2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)},     pages={1492--1495},     year={2016},     month={07},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2016.7729381},     issn={2153-7003}, }
	When to fuse what? Random Forest based fusion of low-, mid-, and high-level information for land cover classification from optical and SAR images R. Hänsch, O. Hellwich, IGARSS 2016, pp. 3587-3590, July 2016. Link     bibtex @inproceedings{{hansch2016fuse,     title={When to fuse what? random forest based fusion of low-, mid-, and high-level information for land cover classification from optical and SAR images},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={ 2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)},     pages={3587--3590},     year={2016},     month={07},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2016.7729929},     issn={2153-7003}, }
	Automated image analysis for trajectory determination of single drop collisions J. Kamp, R. Hänsch, G. Kendzierski, M. Kraume, O. Hellwich, Computers and Chemical Engineering, Vol. 89, 9, pp. 184-191, April 2016. Link     bibtex @article{kamp2016automated,     title={Automated image analysis for trajectory determination of single drop collisions},     author={Kamp, Johannes and H{\"a}nsch, Ronny and Kendzierski, Gregor and Kraume, Matthias and Hellwich, Olaf},     journal={Computers \& Chemical Engineering},     volume={89},     pages={184--191},     year={2016},     month={04},     publisher={Elsevier},     doi={10.1016/j.compchemeng.2016.03.033},     issn{0098-1354}, }
	Human Recognition in RGBD combining Object Detectors and Conditional Random Fields K. Amplianitis, R. Hänsch, R. Reulke, VISAPP 2016 Rome, Italy, February 2016. Link     Paper     bibtex @inproceedings{amplianitis2016human,     title={Human Recognition in RGBD Combining Object Detectors and Conditional Random Fields},     author={Amplianitis, Konstantinos and H{\"a}nsch, Ronny and Reulke, Ralf},     booktitle={Proceedings of the 11th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (4: VISAPP)},     volume={4},     pages={655--663},     year={2016},     month={02},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0005786006550663},     isbn={978-989-758-175-5}, }

2015

	Evaluation of tree creation methods within Random Forests for classification of PolSAR images R. Hänsch, O. Hellwich, IGARSS 2015 Milan, Italy, July 2015. Link     bibtex @inproceedings{haensch2015evaluation,     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Evaluation of tree creation methods within random forests for classification of PolSAR images},     booktitle={IGARSS 2015 - IEEE International Geoscience and Remote Sensing Symposium},     volume={},     year={2015},     month={07},     pages={361-364},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2015.7325775},     issn={2153-6996}, }
	Feature-independent classification of hyperspectral images by Projection-Based Random Forests R. Hänsch, O. Hellwich, WHISPERS 2015 Tokyo, Japan, June 2015. Link     bibtex @inproceedings{haensch2015feature,     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     title={Feature-independent classification of hyperspectral images by projection-based random forests},     booktitle={WHISPERS 2015 - 13th International Conference on Computer Vision Theory and Applications},     volume={},     year={2015},     month={06},     pages={1--4},     publisher={IEEE},     organization={},     doi={10.1109/WHISPERS.2015.8075462},     isbn={978-1-4673-9016-3}, }
	Performance Assessment and Interpretation of Random Forests by Three-Dimensional Visualizations R. Hänsch, O. Hellwich, IVAPP 2015 - Proceedings of the International Conference on Information Visualization Theory and Applications Berlin, Germany, March 2015. Link     bibtex @inproceedings{haensch2015performance,     author={Ronny H{\"a}nsch and Olaf Hellwich},     title={Performance Assessment and Interpretation of Random Forests by Three-dimensional Visualizations},     booktitle={Proceedings of the 6th International Conference on Information Visualization Theory and Applications - Volume 1: IVAPP, (VISIGRAPP 2015)},     year={2015},     month={03},     pages={149--156},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0005310901490156},     isbn={978-989-758-088-8}, }
	Prior Knowledge about Camera Motion for Outlier Removal in Feature Matching E.K. Stathopoulou, R. Hänsch, O. Hellwich, VISAPP 2015 - Proceedings of the International Conference on Computer Vision Theory and Applications Berlin, Germany, March 2015. Link     bibtex @inproceedings{elisavet2015prior,     author={Elisavet K. Stathopoulou and Ronny H{\"a}nsch and Olaf Hellwich},     title={Prior Knowledge About Camera Motion for Outlier Removal in Feature Matching},     booktitle={Proceedings of the 10th International Conference on Computer Vision Theory and Applications - Volume 2: MMS-ER3D, (VISIGRAPP 2015)},     volume = {2},     year={2015},     month={03},     pages={603--610},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0005456406030610},     isbn={978-989-758-090-1}, }
	Automatic registration of unordered point clouds acquired by Kinect sensors using an overlap heuristic T. Weber, R. Hänsch, O. Hellwich, ISPRS Journal of Photogrammetry and Remote Sensing, Volume 102, April 2015, Pages 96-109. Link     bibtex @article{weber2015automatic,     title={Automatic registration of unordered point clouds acquired by Kinect sensors using an overlap heuristic},     author={Weber, T and H{\"a}nsch, Ronny and Hellwich, Olaf},     journal={ISPRS Journal of Photogrammetry and Remote Sensing},     volume={102},     pages={96--109},     year={2015},     month={04},     publisher={Elsevier},     doi={10.1016/j.isprsjprs.2014.12.014},     issn{0924-2716}, }

2014

	Comparison of 3D Interest Point Detectors and Descriptors for Point Cloud Fusion Hänsch, R., Weber, T. & Hellwich, O., ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2014, pp. 57-64, Zurich, Switzerland, September 2014. Link     Paper     bibtex @article{haensch2014comparison,     author={H\"ansch, R. and Weber, T. and Hellwich, O.},     title={Comparison of 3D interest point detectors and descriptors for point cloud fusion},     journal={ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences},     volume={3-3},     year={2014},     month={08}     pages = {57--64},     publisher={Copernicus Publications},     doi={10.5194/isprsannals-II-3-57-2014},     issn={2194-9042}, }
	Security Impact of High Resolution Smartphone Cameras Fiebig, T., Hänsch, R. & Krissler, J., Proceedings of the 23rd USENIX Security Symposium 2014, San Diego, USA, August 2014. Link     Paper     bibtex @inproceedings {fiebig2014security,     author = {Tobias Fiebig and Jan Krissler and Ronny H{\"a}nsch},     title = {Security Impact of High Resolution Smartphone Cameras},     booktitle = {WOOT 2014 : 8th USENIX Workshop on Offensive Technologies},     year = {2014},     month = {08},     pages={},     publisher = {{USENIX} Association},     doi={},     issn={}, }
	Graph-Cut Segmentation of Polarimetric SAR Images Hänsch, R., Hellwich, O. & Wang, X., Proceedings of the IGARSS 2014, pp. 1733-1736, Quebec, Canada, July 2014. Link     bibtex @inproceedings{haensch2014graph,     author={H{\"a}nsch, Ronny and Hellwich, Olaf and Wang, Xi},     title={Graph-cut segmentation of polarimetric SAR images},     booktitle={IGARSS 2014 - IEEE International Geoscience and Remote Sensing Symposium},     volume={},     year={2014},     month={07},     pages={1733-1736},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2014.6946786},     issn={2153-6996}, }
	Comparison of different Color Spaces for Image Segmentation using Graph-Cut Wang, X., Hänsch, R., Hellwich, O., Proceedings of the 9th International Conference on Computer Vision Theory and Applications, VISAPP 2014, pp. 301-308, Lisbon, Portugal, January 2014. Link     bibtex @inproceedings{wang2014comparison,     author={Xi Wang and Ronny H{\"a}nsch and Lizhuang Ma and Olaf Hellwich},     title={Comparison of Different Color Spaces for Image Segmentation using Graph-cut},     booktitle={VISIGRAPP 2014 - Proceedings of the 9th International Conference on Computer Vision Theory and Applications VISAPP},     volume={1},     year={2014},     month={01}     pages={301-308},     publisher={SciTePress},     organization={INSTICC},     doi={10.5220/0004681603010308},     isbn={978-989-758-003-1}, }

2013

Integrated Matching and Geocoding of SAR and Optical Satellite Images Hellwich, O., Wefelscheid, C., Lukaszewicz, J., Hänsch, R., Siddique, M.A. and Stanski, A., Proceedings of 6th Iberian Conference, ibPRIA 2013, Madeira, Portugal, June 2013. Link     Paper     bibtex @inproceedings{hellwich2013integrated,     title={Integrated Matching and Geocoding of SAR and Optical Satellite Images},     author={Hellwich, Olaf and Wefelscheid, Cornelius and Lukaszewicz, Jakub and H{\"a}nsch, Ronny and Siddique, M. Adnan and Stanski, Adam},     booktitle={ibPRIA 2013; Pattern Recognition and Image Analysis},     volume={},     pages={798--807},     year={2013},     month={06},     organization={},     publisher={Springer},     doi={10.1007/978-3-642-38628-2_95},     isbn={978-3-642-38628-2}, }

2012

Impact of Hierarchical Structures in Image Categorization Systems Klaghstan, M., Hänsch, R. und Hellwich, O., Proceedings of IPTA 2012, Turkey, Istanbul, October 2012. Link     bibtex @inproceedings{klaghstan2012impact,     title={Impact of hierarchical structures in image categorization systems},     author={Klaghstan, Merza and H{\"a}nsch, Ronny and Coquil, David and Hellwich, Olaf},     booktitle={IPTA 2012 - 3rd International Conference on Image Processing Theory, Tools and Applications},     pages={367--370},     year={2012},     month ={10},     publisher={IEEE},     organization={},     doi={10.1109/IPTA.2012.6469543},     issn={2154-512X}, }

Automated drop detection using image analysis for online particle size monitoring in multiphase systems Maaß, S., Rojahn, J., Hänsch, R. and Kraume, M., Computers and Chemical Engineering, Vol. 45, pp. 27-37, October 2012. Link     bibtex @article{,     title={Automated drop detection using image analysis for online particle size monitoring in multiphase systems},     author={Sebastian Maa{\ss} and J{\"u}rgen Rojahn and Ronny H{\"a}nsch and Matthias Kraume},     journal={Computers \& Chemical Engineering},     volume={45},     pages={27--37},     year={2012},     month={04},     publisher={Elsevier},     doi={10.1016/j.compchemeng.2012.05.014},     issn{0098-1354}, }

2011

	Three-Dimensional Building Reconstruction Using Images Obtained By Unmanned Aerial Vehicles Wefelscheid, C., Hänsch, R. and Hellwich, O., Proceedings of the International Conference on Unmanned Aerial Vehicle in Geomatics (UAV-g) 2011, Editors: H. Eisenbeiss, M. Kunz and H. Ingensand, Zurich, Switzerland, September 2011. Link     Paper     bibtex @article{wefelscheid2011three,     title={Three-dimensional building reconstruction using images obtained by unmanned aerial vehicles},     author={Wefelscheid, Cornelius and H{\"a}nsch, Ronny and Hellwich, Olaf},     journal={ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences},     volume={XXXVIII-1/C22},     pages={183--188},     year={2011},     month={09},     publisher={Copernicus Publications},     doi={10.5194/isprsarchives-XXXVIII-1-C22-183-2011},     issn = {1682-1750}, }
	Color Textons for Building Detection Hänsch, R. and Hellwich, O., The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol. XXXVIII-4/W19, Hannover, Germany, June 2011. Link     Paper     bibtex @article{hansch2011color,     title={Color Textons for Building Detection},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     journal={ISPRS-International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences},     volume={XXXVIII-4/W19},     pages={97--100},     year={2011},     month={09},     publisher ={Copernicus Publications},     doi={10.5194/isprsarchives-XXXVIII-4-W19-97-2011},     issn = {1682-1750}, }
	Building Detection From One Orthophoto and High-Resolution InSAR Data Using Conditional Random Fields Hänsch, R., Wegner, J.D., Thiele, A. and Soergel, U., IEEE Journal of selected topics in applied Earth Observations and Remote Sensing, Vol. 4(1), pp. 83-91, March 2011. Link     bibtex @article{wegner2011building,     title={Building detection from one orthophoto and high-resolution InSAR data using conditional random fields},     author={Wegner, Jan Dirk and H{\"a}nsch, Ronny and Thiele, Antje and Soergel, Uwe},     journal={IEEE Journal of selected topics in applied Earth Observations and Remote Sensing},     volume={4},     number={1},     pages={83},     year={2011},     month={03},     publisher={IEEE},     organization={},     doi={10.1109/JSTARS.2010.2053521},     issn={1939-1404}, }

2010

	Complex-Valued Multi-Layer Perceptrons - An Application to Polarimetric SAR data Hänsch, R., PE&RS, Photogrammetric Engineering & Remote Sensing Journal, 76(9):1081-1088, 2010. Link     bibtex @article{hansch2010complex,     title={Complex-Valued Multi-Layer Perceptrons--An Application to Polarimetric SAR Data},     author={H{\"a}nsch, Ronny},     journal={PE\&RS 2010 - Photogrammetric Engineering \& Remote Sensing Journal},     volume={76},     number={9},     pages={1081--1088},     year={2010},     month={09},     publisher={American Society for Photogrammetry and Remote Sensing},     issn={0099-1112},     doi={10.14358/PERS.76.9.1081}, }
	Random Forests for Building Detection in Polarimetric SAR data Hänsch, R. and Hellwich, O., Proceedings of IGARRS 2010, Hawaii, USA, pp. 460-463, July 2010. Link     bibtex @inproceedings{hansch2010random,     title={Random forests for building detection in polarimetric sar data},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={IGARSS 2010 - IEEE International Geoscience and Remote Sensing Symposium},     volume={},     year={2010},     month={07},     pages={460--463},     publisher={IEEE},     organization={},     doi={10.1109/IGARSS.2010.5652539},     issn={2153-6996},     isbn={978-1-4244-9565-8}, }
	Convolutional Complex-Valued Neural Networks for Object Detection in PolSAR data Hänsch, R. and Hellwich, O., Proceedings of EUSAR 2010, VDE, Aachen,Germany, pp. 877-880, June 2010. Link     bibtex @inproceedings{hansch2010complex,     title={Complex-valued convolutional neural networks for object detection in PolSAR data},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={EUSAR 2010; 8th European Conference on Synthetic Aperture Radar},     year={2010},     month={06},     pages={877-880},     publisher={VDE},     organization={},     isbn={978-3-8007-3272-2}, }
	Fusion of high-resolution InSAR data and optical imagery for building detection using Conditional Random Fields Hänsch, R., Wegner, J.-D., Thiele, A. and Sörgel, U., Proceedings of EUSAR 2010, VDE, Aachen, Germany, pp. 1090-1093, June 2010. Link     bibtex @inproceedings{wegner2010fusion,     title={Fusion of high-resolution InSAR data and optical imagery for building detection using Conditional Random Fields},     author={Wegner, Jan Dirk and Soergel, Uwe and Haensch, Ronny and Thiele, Antje},     booktitle={EUSAR 2010; 8th European Conference on Synthetic Aperture Radar},     year={2010},     month={06},     pages={1090--1093},     publisher={VDE},     organization={},     isbn={978-3-8007-3272-2}, }

2009

Semi-Supervised Learning For Classification of Polarimetric SAR-Data Hänsch, R. and Hellwich, O., Proceedings of IGARSS 2009, Capetown, South Africa, July 2009. Link     bibtex @inproceedings{hansch2009semi,     title={Semi-supervised learning for classification of polarimetric SAR-data},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={IGARSS 2009 - IEEE International Geoscience and Remote Sensing Symposium},     volume={3},     pages={987-990},     year={2009},     month={02},     organization={IEEE},     doi={10.1109/IGARSS.2009.5417941},     isbn={978-1-4244-3394-0},     issn={2153-6996}, }

Classification of Polarimetric SAR Data by Complex Valued Neural Networks Hänsch, R. and Hellwich, O., Prodeedings of ISPRS Workshop 2009, Volume XXXVIII, Part 1-4-7/W5, Hannover, Germany, June 2009. Link     Paper     bibtex @inproceedings{hansch2009classification,     title={Classification of polarimetric SAR data by complex valued neural networks},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={ISPRS Hannover Workshop 2009: High-Resolution Earth Imaging for Geospatial Information},     volume={XXXVIII-1-4-7/W5},     pages={},     year={2009},     month={06},     publisher={Copernicus Publications},     issn={1682-1750}, }

2008

Weighted Pyramid Linking for Segmentation of Fully-Polarimetric SAR Data Hänsch, R., Jäger, M. and Hellwich, O., XXI Congress of the Int. Society for Photogrammetry and Remote Sensing (ISPRS), Int. Archives of Photogrammetry and Remote Sensing, vol. XXXVII, Beijing, China, July 2008. Link     Paper     bibtex @inproceedings{hansch2008weighted,     title={Weighted pyramid linking for segmentation of fully-polarimetric SAR data},     author={H{\"a}nsch, Ronny and Hellwich, Olaf},     booktitle={XXIst ISPRS Congress of the Int. Society for Photogrammetry and Remote Sensing Comission VII},     volume={XXXVII Part B7},     pages={95--100},     year={2008},     month={07},     publisher={Copernicus Publications},     issn={1682-1750}, }

Clustering by deterministic annealing and Wishart based distance measures for fully-polarimetric SAR-data Hänsch, R., Jäger, M. and Hellwich, O., Proceedings of EUSAR 2008, Volume 3, Friedrichshafen, Germany, pp. 419-422, June 2008 Link     bibtex @inproceedings{hansch2008clustering,     title={Clustering by deterministic annealing and Wishart based distance measures for fully-polarimetric SAR-data},     author={H{\"a}nsch, Ronny and J{\"a}ger, Marc and Hellwich, Olaf},     booktitle={EUSAR 2008; 7th European Conference on Synthetic Aperture Radar},     pages={},     year={2008},     month={06},     organization={VDE},     isbn={978-3-8007-3084-7}, }

2007

A Distributed Approach to Efficient Time-Domain SAR Processing Reigber, A., Jäger, M., Dietzsch, A., Hänsch, R., Weber, M., Przybyl, H., Prats, P., Proceedings of IGARSS'07, Barcelona, Spain, pp. 582-585, July 2007. Link     bibtex @inproceedings{reigber2007distributed,     title={A distributed approach to efficient time-domain SAR processing},     author={Reigber, Andreas and Jager, M and Dietzsch, Andreas and H\"ansch, R and Weber, Michael and Przybyl, Heiko and Prats, Pau},     conference={IGARSS 2007},     booktitle={IGARSS 2007; IEEE International Geoscience and Remote Sensing Symposium},     publisher={IEEE},     pages={582--585},     year={2007},     month={07},     organization={IEEE},     doi={10.1109/IGARSS.2007.4422861},     issn={2153-6996},     isbn={978-1-4244-1211-2}, }

Theses

• Generic object categorization in PolSAR images - and beyond
  Doctoral thesis, Technische Universität Berlin, 2014. [link]
• Offline Recognition of Japanese Characters
  Diploma thesis, Technische Universität Berlin, 2007.

Research in Media

• PhD-thesis summary in "Hochschulnachrichten", Journal for Photogrammetry, Remote Sensing and Geoinformation Science, No. 6, 2014
• BR-online: Hochauflösende Kameras: Wie Smartphones zum Sicherheitsrisiko werden
• heise.de: Smartphones: Passwörter und Fingerabdrücke mittels eingebauter Kamera ausspioniert
• spiegel.de: Smartphone-Kameras: Hohe Auflösung, hohes Sicherheitsrisiko

• Latest News

• 13.05.2019

  I started my new position at the Department SAR Technology, DLR, Wessling, Germany.

• 17.12.2018

  The Computer Vision and Pattern Recognition (CVPR) 2019 Conference accepted both workshop proposals for which I am involved in the organization: The WS EarthVision'19 will address the fusion of Earth Observation and Computer Vision. The WS Photogrametric Computer Vision will focus on image-based 3D reconstruction.

• 14.12.2018

  The code for our RF visualization tool to be presented at WACV'19 is now online! Please check it out!

• 23.11.2018

  The next workshop "Photogrammetric 3D Reconstruction for Geo-Applications" (PhotoGA 2019) is going to take place in conjunction with the AI.GI.CRV 2019 Conference.

• 15.11.2018

  IGARSS'19 accepted both Invited Session proposals: The traditional session of the GRSS IADF TC entitled "Data Fusion: The AI Era" as well as the session organized together with K. Doctor entitled "Labels in Deep Learning: Friend or Foe". For both sessions we have invited high-quality contributions. Hope to see you there.

• 14.11.2018

  The tutorial "Machine Learning in Remote Sensing" was accepted again for IGARSS'19. It is the 3rd time this tutorial is going to take place. We will have again four interesting talks covering basic topics as well as describing the most state of the art approaches.

• 05.11.2018

  Our paper "Exploiting SAR Tomography for Supervised Land-Cover Classification" was accepted by Remote Sensing. It is the first in-depth study of using TomoSAR data for land-cover classification. It is open access, so there is no reason for not reading it! ;-)

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