Peer-Reviewed Publications

  1. Deep Diffeomorphic Transformer Networks. CVPR 2018.
    Skafte Detlefsen, N., Freifeld, O., and Hauberg, S.
    [ PDF ] [ Supplemental Material ] [ Nicki Skafte Deftelsen's derivation of the matrix exponentials: PDF; Maple ] [Code: coming soon]

  2. The Manhattan Frame Model -- Manhattan World Inference in the Space of Surface Normals. IEEE-TPAMI 2018.
    Straub, J., Freifeld, O., Rosman, G., Leonard, J., and Fisher III J.
    [ PDF ]

  3. Transformations Based on Continuous Piecewise-Affine Velocity Fields. IEEE-TPAMI 2017.
    Freifeld, O., Hauberg, S., Batmanghelich, K. and Fisher III, J.
    [ PDF ] [ Supplemental Material ] [ Technical Report: Deriving the CPAB Derivative (also includes fixing a small mistake in Eq 24 from the PAMI paper) ]

  4. Dreaming More Data: Class-dependent Distributions over Diffeomorphisms for Learned Data Augmentation. AISTATS 2016. Accepted as Oral
    Hauberg, S., Freifeld, O., Larsen, A.B.L., Fisher III, J., and Hansen, L.K.
    [ PDF ] [ Video ] [ Datasets (AlignMNIST and AlignMNIST500) ]

  5. Highly-Expressive Spaces of Well-Behaved Transformations: Keeping It Simple. ICCV 2015.
    Freifeld, O., Hauberg, S., Batmanghelich, K. and Fisher III, J.
    [ PDF ] [ BibTex ] [ Project Webpage ] [ Supplemental Material ] [ Poster ] [ Code 1: uses GPU; requires an NVIDIA card; written in Python+CUDA ] [ Code 2: CPU-only; partial implementation; written in Julia ] [ Video 1: Conditional warp ] [ Video 2: ICCV spotlight ]

  6. A Fast Method for Inferring High-Quality Simply-Connected Superpixels. ICIP 2015. Accepted as Oral. Recognized as one of the "Top 10% ICIP 2015 papers".
    Freifeld, O., Li, Y. and Fisher III, J.
    [ PDF ] [ BibTex ] [ Slides ] [ Project Webpage ] [ Code: CUDA + Python/C++/Matlab wrappers ] [ Remarks about the initialization+benchmarks ]
    For additional examples in higher resolution than those in the paper: [ original (~38MB) ] [ slightly compressed (~5MB) ]

  7. A Dirichlet Process Mixture Model for Spherical Data. AISTATS 2015. Accepted as Oral.
    Straub, J., Chang, J., Freifeld, O., and Fisher III, J.
    [ PDF ] [ BibTex ] [ Supplemental Material ] [ Code ]

  8. A Mixture of Manhattan Frames: Beyond the Manhattan World. CVPR 2014. Accepted as Oral.
    Straub, J., Rosman, G., Freifeld, O., Leonard, J. and Fisher III, J.
    [ PDF ] [ BibTex [ Project Webpage ] [ Supplemental Material ] [ Video ] [ Code ]
    After the exposure it received in MIT News, this project was also covered by many technology/robotics websites

  9. Aerial Reconstructions via Probabilistic Data Fusion. CVPR 2014
    Cabezas R., Freifeld, O., Rosman G. and Fisher III, J.
    [ PDF ] [ BibTex ] [ Project Webpage ] [ Supplemental Material ] [ Video ] [ Code ] [ A 3D result reviewer ]

  10. Model Transport: Towards Scalable Transfer Learning on Manifolds. CVPR 2014
    Freifeld, O., Hauberg, S. and Black, M.J.
    [ PDF ] [ BibTex ] [ Supplemental Material ] [ Video ] [ Remark about the data ]

  11. A freely-moving monkey treadmill model. Journal of Neural Engineering, 2014.
    Foster, J.D., Nuyujukian, P., Freifeld, O., Gao, Walker, Ryu, S., Meng, T., Murmann, Black, M.J., Shenoy, K.V.
    [ PDF (coming up soon) ] [ Project webpage at MPI-IS-PS ] [ Shenoy's group at Stanford EE ]

  12. A Geometric take on Metric Learning. NIPS 2012
    Hauberg, S., Freifeld, O. and Black, M.J.
    [ PDF ] [ BibTex ] [ Project Webpage ] [ Supplemental Material ] [ Video ] [ Code ]

  13. Lie Bodies: A Manifold Representation of 3D Human Shape. ECCV 2012.
    Freifeld, O. and Black, M.J.
    [ PDF ] [ BibTex ] [ Project Webpage ] [ Supplemental Material ] [ Poster ] [ Video 1] [ Video 2 (~40 MB) ] [ Code ] [ Remark about the data ]

  14. From pictorial structures to deformable structures. CVPR 2012.
    Zuffi, S., Freifeld O. and Black M.J.
    [ PDF ] [ BibTex ] [ Project Webpage ] [ Code ]

  15. A framework for relating neural activity to freely moving behavior. IEEE-EMBC 2012. Accepted as Oral.
    Foster, J.D., Nuyujukian, P., Freifeld, O., Ryu, S., Black, M.J. and Shenoy, K.V.
    [ BibTex ]

  16. Combining wireless neural recording and video capture for the analysis of natural gait. IEEE-NER 2011. Accepted as Oral.
    Foster, J., Freifeld, O., Nuyujukian, P., Ryu, S., Black, M.J. and Shenoy, K.V.
    [ PDF ] [ BibTex ]

  17. A 2D human body model dressed in eigen clothing. ECCV 2010.
    Guan, P., Freifeld, O. and Black, M.J.
    [ PDF ] [ BibTex ] [ Data ]

  18. Contour people: A parameterized model of 2D articulated human shape. CVPR 2010. Accepted as Oral.
    Freifeld O., Weiss, A., Zuffi, S. and Black, M.J.
    [ PDF ] [ BibTex ] [ Slides ] [ Video of CVPR talk ]

  19. Multiple Sclerosis lesion detection using constrained GMM and curve evolution. International Journal of Biomedical Imaging, 2009.
    Freifeld, O., Greenspan, H. and Goldberger, J.
    [ PDF ]

  20. Lesion detection in noisy MR brain images using constrained GMM and active contours. IEEE-ISBI 2007. Accepted as Oral.
    Freifeld, O., Greenspan, H. and Goldberger, J.
    [ PDF ] [ Slides ]

Theses

  1. Statistics on Manifolds with Applications to Modeling Shape Deformations. PhD Thesis, Brown University, August 2013.
    Freifeld, O.
    [
    PDF ] [ BibTex ] [ Eratta ]

  2. MR Brain Image Analysis: Healthy Tissue Segmentation and Multiple Sclerosis Lesion Detection Using Constrained GMM and Curve Evolution. MSc Thesis, Tel-Aviv University, July 2007.
    Freifeld, O.