2023
Esfandiar Navayazdani, Felix Ambellan, Martin Hanik, Christoph von Tycowicz	Sasaki Metric for Spline Models of Manifold-Valued Trajectories	Computer Aided Geometric Design, 2023 (accepted for publication)	BibTeX
2022
Esfandiar Nava-Yazdani, Hans-Christian Hege, Christoph von Tycowicz	A Hierarchical Geodesic Model for Longitudinal Analysis on Manifolds	Journal of Mathematical Imaging and Vision, 64(4), pp. 395-407, 2022 (preprint available as ZIB-Report 21-39)	PDF (ZIB-Report) BibTeX DOI
Martha Paskin, Mason Dean, Daniel Baum, Christoph von Tycowicz	A Kendall Shape Space Approach to 3D Shape Estimation from 2D Landmarks	Computer Vision -- ECCV 2022, pp. 363-379, 2022	BibTeX arXiv DOI
Martha Paskin, Daniel Baum, Mason N. Dean, Christoph von Tycowicz	A Kendall Shape Space Approach to 3D Shape Estimation from 2D Landmarks -- Source Code and Data	2022	BibTeX DOI
Martin Hanik, Hans-Christian Hege, Christoph von Tycowicz	A Nonlinear Hierarchical Model for Longitudinal Data on Manifolds	2022 IEEE 19th International Symposium on Biomedical Imaging (ISBI), pp. 1-5, 2022	BibTeX arXiv DOI
Julius Mayer, Daniel Baum, Felix Ambellan, Christoph von Tycowicz	A Soft-Correspondence Approach to Shape-based Disease Grading with Graph Convolutional Networks	Proceedings of Machine Learning Research, 2022	PDF BibTeX
Martin Hanik, Hans-Christian Hege, Christoph von Tycowicz	Bi-invariant Dissimilarity Measures for Sample Distributions in Lie Groups	SIAM Journal on Mathematics of Data Science, 4(4), pp. 1223-1249, 2022	BibTeX DOI
Felix Ambellan	Efficient Riemannian Statistical Shape Analysis with Applications in Disease Assessment	Doctoral thesis, Freie Universität Berlin, Christof Schütte, Christoph von Tycowicz (Advisors), 2022	PDF BibTeX DOI URN
Adele Myers, Saiteja Utpala, Shubham Talbar, Sophia Sanborn, Christian Shewmake, Claire Donnat, Johan Mathe, Umberto Lupo, Rishi Sonthalia, Xinyue Cui, Tom Szwagier, Arthur Pignet, Andri Bergsson, Søren Hauberg, Dmitriy Nielsen, Stefan Sommer, David Klindt, Erik Hermansen, Melvin Vaupel, Benjamin Dunn, Jeffrey Xiong, Noga Aharony, Itsik Pe’er, Felix Ambellan, Martin Hanik, Esfandiar Navayazdani, Christoph von Tycowicz, Nina Miolane	ICLR 2022 Challenge for Computational Geomerty & Topology: Design and Results	Proceedings of Topology, Algebra, and Geometry in Learning, pp. 269-276, Vol.196, Proceedings of Machine Learning Research, 2022	PDF BibTeX arXiv
Esfandiar Nava-Yazdani, Martin Hanik, Felix Ambellan, Christoph von Tycowicz	On Gradient Formulas in an Algorithm for the Logarithm of the Sasaki Metric	ZIB-Report 22-12	PDF BibTeX URN
Stephan Oehme, Philippe Moewis, Heide Boeth, Benjamin Bartek, Annika Lippert, Christoph von Tycowicz, Rainald Ehrig, Georg Duda, Tobias Jung	PCL insufficient patients with increased translational and rotational passive knee joint laxity have no increased range of anterior–posterior and rotational tibiofemoral motion during level walking	Scientific Reports, 12(1), pp. 1-11, 2022	PDF BibTeX DOI
Ariel Caputo, Marco Emporio, Andrea Giachetti, Marco Cristani, Guido Borghi, Andrea D'Eusanio, Minh-Quan Le, Hai-Dang Nguyen, Minh-Triet Tran, Felix Ambellan, Martin Hanik, Esfandiar Navayazdani, Christoph von Tycowicz	SHREC 2022 Track on Online Detection of Heterogeneous Gestures	Computers and Graphics, Vol.107, pp. 241-251, 2022	BibTeX arXiv DOI
Martin Hanik, Christoph von Tycowicz	Triangle meshes of shadow-recieving surfaces of ancient sundials	2022	BibTeX DOI
2021
Felix Ambellan, Stefan Zachow, Christoph von Tycowicz	Geodesic B-Score for Improved Assessment of Knee Osteoarthritis	Proc. Information Processing in Medical Imaging (IPMI), pp. 177-188, Lecture Notes in Computer Science, 2021 (preprint available as ZIB-Report 21-09)	PDF (ZIB-Report) BibTeX arXiv DOI
Felix Ambellan, Martin Hanik, Christoph von Tycowicz	Morphomatics: Geometric morphometrics in non-Euclidean shape spaces	2021	BibTeX DOI
Philippe Moewis, René Kaiser, Adam Trepczynski, Christoph von Tycowicz, Leonie Krahl, Ansgar Ilg, Johannes Holz, Georg N. Duda	Patient specific resurfacing implant knee surgery in subjects with early osteoarthritis results in medial pivot and lateral femoral rollback during flexion: A retrospective pilot study	Knee Surgery, Sports Traumatology, Arthroscopy, 2021	BibTeX DOI
Felix Ambellan, Stefan Zachow, Christoph von Tycowicz	Rigid Motion Invariant Statistical Shape Modeling based on Discrete Fundamental Forms	Medical Image Analysis, Vol.73, 2021	BibTeX DOI arXiv
Ivan Sipiran, Patrick Lazo, Cristian Lopez, Nihar Bagewadi, Benjamin Bustos, Hieu Dao, Shankar Gangisetty, Martin Hanik, Ngoc-Phuong Ho-Thi, Mike Holenderski, Dmitri Jarnikov, Arniel Labrada, Stefan Lengauer, Roxane Licandro, Dinh-Huan Nguyen, Thang-Long Nguyen-Ho, Luis A. Pérez Rey, Bang-Dang Pham, Minh-Khoi Pham, Reinhold Preiner, Tobias Schreck, Quoc-Huy Trinh, Loek Tonnaer, Christoph von Tycowicz, The-Anh Vu-Le	SHREC 2021: Retrieval of Cultural Heritage Objects	Computers and Graphics, Vol.100, pp. 1-20, 2021	BibTeX DOI
2020
Martin Hanik, Hans-Christian Hege, Christoph von Tycowicz	Bi-invariant Two-Sample Tests in Lie Groups for Shape Analysis	Shape in Medical Imaging, pp. 44-54, 2020	BibTeX arXiv DOI
Esfandiar Nava-Yazdani, Hans-Christian Hege, T. J. Sullivan, Christoph von Tycowicz	Geodesic Analysis in Kendall's Shape Space with Epidemiological Applications	Journal of Mathematical Imaging and Vision, 62(4), pp. 549-559, 2020	BibTeX DOI arXiv
Martin Hanik, Hans-Christian Hege, Anja Hennemuth, Christoph von Tycowicz	Nonlinear Regression on Manifolds for Shape Analysis using Intrinsic Bézier Splines	Proc. Medical Image Computing and Computer Assisted Intervention (MICCAI), pp. 617-626, 2020	BibTeX arXiv DOI
Christoph von Tycowicz	Towards Shape-based Knee Osteoarthritis Classification using Graph Convolutional Networks	2020 IEEE 17th International Symposium on Biomedical Imaging (ISBI 2020), 2020	BibTeX arXiv DOI
2019
Esfandiar Nava-Yazdani, Hans-Christian Hege, Christoph von Tycowicz	A Geodesic Mixed Effects Model in Kendall's Shape Space	Proc. 7th MICCAI workshop on Mathematical Foundations of Computational Anatomy (MFCA), pp. 209-218, Vol.11846, Lecture Notes in Computer Science, 2019 (preprint available as ZIB-Report 19-49)	PDF (ZIB-Report) BibTeX DOI
Felix Ambellan, Stefan Zachow, Christoph von Tycowicz	A Surface-Theoretic Approach for Statistical Shape Modeling	Proc. Medical Image Computing and Computer Assisted Intervention (MICCAI), Part IV, pp. 21-29, Vol.11767, Lecture Notes in Computer Science, 2019 (preprint available as ZIB-Report 19-20)	PDF (ZIB-Report) BibTeX DOI
Felix Ambellan, Stefan Zachow, Christoph von Tycowicz	An as-invariant-as-possible GL+(3)-based Statistical Shape Model	Proc. 7th MICCAI workshop on Mathematical Foundations of Computational Anatomy (MFCA), pp. 219-228, Vol.11846, Lecture Notes in Computer Science, 2019 (preprint available as ZIB-Report 19-46)	PDF (ZIB-Report) BibTeX DOI
Felix Ambellan, Hans Lamecker, Christoph von Tycowicz, Stefan Zachow	Statistical Shape Models - Understanding and Mastering Variation in Anatomy	Biomedical Visualisation, Paul M. Rea (Ed.), Springer Nature Switzerland AG, 1, pp. 67-84, 2019, ISBN: 978-3-030-19384-3, ISBN: 978-3-030-19385-0 (preprint available as ZIB-Report 19-13)	PDF (ZIB-Report) BibTeX DOI
2018
Esfandiar Nava-Yazdani, Hans-Christian Hege, Christoph von Tycowicz, T. J. Sullivan	A Shape Trajectories Approach to Longitudinal Statistical Analysis	ZIB-Report 18-42	PDF BibTeX URN
Christoph von Tycowicz, Felix Ambellan, Anirban Mukhopadhyay, Stefan Zachow	An Efficient Riemannian Statistical Shape Model using Differential Coordinates	Medical Image Analysis, 43(1), pp. 1-9, 2018 (preprint available as ZIB-Report 16-69)	PDF (ZIB-Report) BibTeX DOI
Martin Krämer, Marta Maggioni, Christoph von Tycowicz, Nick Brisson, Stefan Zachow, Georg N Duda, Jürgen Reichenbach	Ultra-short echo-time (UTE) imaging of the knee with curved surface reconstruction-based extraction of the patellar tendon	ISMRM (International Society for Magnetic Resonance in Medicine), 26th Annual Meeting 2018, Paris, France, 2018	BibTeX
2016
Christopher Brandt, Christoph von Tycowicz, Klaus Hildebrandt	Geometric Flows of Curves in Shape Space for Processing Motion of Deformable Objects	Computer Graphics Forum, 35(2), 2016 (preprint available as ZIB-Report 16-29)	PDF (ZIB-Report) BibTeX DOI
2015
Christian Schulz, Christoph von Tycowicz, Hans-Peter Seidel, Klaus Hildebrandt	Animating articulated characters using wiggly splines	ACM SIGGRAPH / Eurographics Symposium on Computer Animation, pp. 101-109, 2015	BibTeX DOI
Martin Krämer, Karl-Heinz Herrmann, Heide Boeth, Christoph von Tycowicz, Christian König, Stefan Zachow, Rainald Ehrig, Hans-Christian Hege, Georg N. Duda, Jürgen Reichenbach	Measuring 3D knee dynamics using center out radial ultra-short echo time trajectories with a low cost experimental setup	ISMRM (International Society for Magnetic Resonance in Medicine), 23rd Annual Meeting 2015, Toronto, Canada, 2015	BibTeX
Christoph von Tycowicz, Christian Schulz, Hans-Peter Seidel, Klaus Hildebrandt	Real-time Nonlinear Shape Interpolation	ACM Transactions on Graphics, 34(3), pp. 34:1-34:10, 2015	BibTeX DOI
Sebastian Götschel, Christoph von Tycowicz, Konrad Polthier, Martin Weiser	Reducing Memory Requirements in Scientific Computing and Optimal Control	Multiple Shooting and Time Domain Decomposition Methods, T. Carraro, M. Geiger, S. Koerkel, R. Rannacher (Eds.), pp. 263-287, 2015	PDF BibTeX
2014
Christian Schulz, Christoph von Tycowicz, Hans-Peter Seidel, Klaus Hildebrandt	Animating Deformable Objects Using Sparse Spacetime Constraints	ACM Transactions on Graphics, 33(4), pp. 109:1-109:10, 2014	BibTeX DOI
Christoph von Tycowicz	Concepts and Algorithms for the Deformation, Analysis, and Compression of Digital Shapes	Doctoral thesis, Freie Universität Berlin, Konrad Polthier (Advisor), 2014	PDF BibTeX DOI URN
Konrad Polthier, Alexander Bobenko, Klaus Hildebrandt, Ralf Kornhuber, Christoph von Tycowicz, Harry Yserentant, Günter M. Ziegler	Geometry processing	MATHEON - Mathematics for Key Technologies, EMS Publishing House, pp. 341-355, 2014, ISBN: 978-3-03719-137-8	BibTeX DOI
2013
Christoph von Tycowicz, Christian Schulz, Hans-Peter Seidel, Klaus Hildebrandt	An Efficient Construction of Reduced Deformable Objects	ACM Transactions on Graphics, 32(6), pp. 213:1-213:10, 2013	BibTeX DOI
2012
Klaus Hildebrandt, Christian Schulz, Christoph von Tycowicz, Konrad Polthier	Interactive spacetime control of deformable objects	ACM Transactions on Graphics, 31(4), pp. 71:1-71:8, 2012	BibTeX DOI
Klaus Hildebrandt, Christian Schulz, Christoph von Tycowicz, Konrad Polthier	Modal Shape Analysis beyond Laplacian	Computer Aided Geometric Design, 29(5), pp. 204-2018, 2012	PDF BibTeX DOI
2011
Christoph von Tycowicz, Felix Kälberer, Konrad Polthier	Context-based Coding of Adaptive Multiresolution Meshes	Computer Graphics Forum, 30(8), pp. 2231-2245, 2011	PDF BibTeX DOI
Klaus Hildebrandt, Christian Schulz, Christoph von Tycowicz, Konrad Polthier	Interactive surface modeling using modal analysis	ACM Transactions on Graphics, 30(5), pp. 119:1-119:11, 2011 (preprint available as )	BibTeX DOI
2010
Klaus Hildebrandt, Christian Schulz, Christoph von Tycowicz, Konrad Polthier	Eigenmodes of Surface Energies for Shape Analysis	Advances in Geometric Modeling and Processing (Proceedings of Geometric Modeling and Processing 2010), Vol.6130, pp. 296-314, Bernard Mourrain, Scott Schaefer, Guoliang Xu (Eds.), Springer Berlin / Heidelberg, 2010	PDF BibTeX DOI
2009
Felix Kälberer, Christoph von Tycowicz, Konrad Polthier	Lossless Compression of Adaptive Multiresolution Meshes	XXII Brazilian Symposium on Computer Graphics and Image Processing, pp. 80-87, 2009	PDF BibTeX DOI
2008
Christoph von Tycowicz, Jörn Loviscach	Measuring and Enhancing the Legibility of GPU-rendered Text	Eurographics 2008 Short Papers, pp. 45-48, 2008	BibTeX
2007
Chris Greenhalgh, Steve Benford, Adam Drozd, Martin Flintham, Alastair Hampshire, Leif Oppermann, Keir Smith, Christoph von Tycowicz	Addressing Mobile Phone Diversity in Ubicomp Experience Development	UbiComp 2007: Ubiquitous Computing, 9th International Conference, pp. 447-464, Vol.4717, Lecture Notes in Computer Science, 2007	BibTeX DOI
Chris Greenhalgh, Steve Benford, Adam Drozd, Martin Flintham, Alastair Hampshire, Leif Oppermann, Keir Smith, Christoph von Tycowicz	EQUIP2: A Platform for Mobile Phone-based Game Development	Concepts and Technologies for Pervasive Games - A Reader for Pervasive Gaming Research, Shaker Verlag, pp. 153-178, 2007, ISBN: 978-3-8322-6223-5	BibTeX
Leif Oppermann, R. Jacobs, M. Watkins, R. Shackford, Christoph von Tycowicz, M. Wright, M. Capra, Chris Greenhalgh, Steve Benford	Love City: A Text-Driven, Location-Based Mobile Phone Game Played Between 3 Cities	Pervasive Gaming Applications - A Reader for Pervasive Gaming Research, Shaker Verlag, pp. 285-312, 2007, ISBN: 978-3-8322-6224-2	BibTeX