Eftychios Sifakis

Eftychios Sifakis

PhD Student – Stanford Computer Science

Contact Info:

Gates Computer Science – Stanford University

353 Serra Mall, Room 209

Stanford, CA 94305-9020

Personal Info

I am currently a 5th year graduate student at Stanford University, pursuing a PhD degree in Computer Science under the supervision of Ron Fedkiw. My current research revolves around the areas of computer graphics, computer vision and computational mathematics. I am particularly interested in modeling, simulation and analysis of human face and body motion. I came to Stanford after completing a B.Sc in Computer Science (2000) and a B.Sc in Mathematics (2002) from the University of Crete, Greece.

Research

My research is aimed at developing algorithms for the simulation of deformable solids with applications on human face and body animation, facial expression analysis and virtual surgery. Individual projects include:

· Visual speech synthesis using muscle-driven face models

· Robust quasistatic simulation algorithms for flesh simulation (with Joey Teran, Geoffrey Irving and Ron Fedkiw)

· Estimation of muscle activations in the human face from motion captured performances (with Igor Neverov and Ron Fedkiw)

· Simulation of anatomically accurate models of skeletal muscles (with Joey Teran, Cynthia Lau and Ron Fedkiw)

Publications

E. Sifakis, T. Shinar, G. Irving and R. Fedkiw, “Hybrid Simulation of Deformable Solids”, ACM SIGGRAPH/Eurographics Symposium on Computer Animation (SCA), edited by D. Metaxas and J. Popovic, 2007 [PDF]
E. Sifakis, K. Der, and R. Fedkiw, “Arbitrary Cutting of Deformable Tetrahedralized Objects”, ACM SIGGRAPH/Eurographics Symposium on Computer Animation (SCA), edited by D. Metaxas and J. Popovic, 2007 [PDF]
C. Hughes, R. Grzeszczuk, E. Sifakis, D. Kim, S. Kumar, A. Selle, J. Chhugani, M. Holliman, Y.-K. Chen, “Physical Simulation for Animation and Visual Effects: Parallelization and Characterization for Chip Multiprocessors”, IEEE/ACM International Symposium on Computer Architecture (ISCA), 2007 [PDF]
E. Sifakis, “Algorithmic Aspects of the Simulation and Control of Computer Generated Human Anatomy Models”, Ph.D. Thesis, Stanford University, 2007 [PDF]
E. Sifakis, A. Selle, A. Robinson-Mosher and R. Fedkiw, “Simulating Speech with a Physics-Based Facial Muscle Model”, ACM SIGGRAPH/Eurographics Symposium on Computer Animation (SCA), edited by M.-P. Cani and J. O’Brien, 2006 [PDF]
E. Sifakis, I. Neverov and R. Fedkiw, “Automatic Determination of Facial Muscle Activations from Sparse Motion Capture Marker Data”, ACM Transactions on Graphics (SIGGRAPH Proceedings), TOG 24, pp. 417-425, 2005 [PDF]
J. Teran, E. Sifakis, G. Irving and R. Fedkiw, “Robust Quasistatic Finite Elements and Flesh Simulation”, ACM/Eurographics Symposium on Computer Animation (SCA), edited by K. Anjyo and P. Faloutsos, pp. 181-190, 2005 [PDF]
J. Teran, E. Sifakis, S. Blemker, V. Ng Thow Hing, C. Lau and R. Fedkiw, “Creating and simulating skeletal muscle from the Visible Human Data Set”, IEEE Transactions on Visualization and Computer Graphics, 11, pp. 317-328, 2005. [PDF]
E. Sifakis and R. Fedkiw, “Facial Muscle Activations from Motion Capture”, in video proceedings of the Computer Vision and Pattern Recognition Conference (CVPR), 2005 [PDF]
S. Blemker, J. Teran, E. Sifakis, R. Fedkiw and S. Delp, “Fast 3D Muscle Simulations Using a New Quasistatic Invertible Finite-Element Algorithm”, International Symposium on Computer Simulation in Biomechanics, 2005 [PDF]
P. Sundaram, E. Sifakis , D. S. Paik, C. F. Beaulieu, S. Napel, “Fold Removal in CT Colonography (CTC): A Physics-based Approach”, Radiological Society of North America 91st Scientific Sessions, November, 2005. Scientific Assembly and Annual Meeting Program 2005:439
P. Sundaram, D.S. Paik, E.D. Sifakis, C.F. Beaulieu and S. Napel, “Selective Fold Removal in CT colonography using physically-based simulation,” Fifth International Symposium on Virtual Colonoscopy, Boston, MA October 28-29, 2004
P. Sundaram, E. Sifakis, D.S. Paik, C.F. Beaulieu, S. Napel, “Physically based approach to removal of folds in CT Colonography: Proof of concept”, Radiological Society of North America 90th Scientific Sessions, November 2004.
S. Liapis, E. Sifakis and G. Tziritas, “Color and texture segmentation using wavelet frame analysis, deterministic relaxation and fast marching algorithms”, Journal of Visual Communication and Image Representation, 15:1, pp. 1-26, March 2004. [PDF]
E. Sifakis and G. Tziritas, “Robust object boundary determination using a locally adaptive level set algorithm”, Intl. Conference on Image Processing, 2003 [PDF]
E. Sifakis and G. Tziritas, “Fast Marching techniques for Visual Grouping”, in Geometric Level Set Methods in Imaging, Vision and Graphics, by S. Osher and N. Paragios (eds), Springer Verlag, July 2003
E. Sifakis, C. Garcia and G. Tziritas, “Bayesian level sets for image segmentation”, Journal of Visual Communication and Image Representation, 13:1-2, pp. 44-64, March 2002 [PDF]
E. Sifakis, I. Grinias and G. Tziritas, “Video segmentation using fast marching and region growing algorithms”, EURASIP Journal on Applied Signal Processing, pp. 379-388, Apr 2002 [PDF]
E. Sifakis and G. Tziritas, “Moving object localization using a multi-label fast marching algorithm”, Signal Processing: Image Communication, 16:10, pp. 963-976, 2001 [PDF]
E. Sifakis, I. Grinias and G. Tziritas, “Video segmentation using fast marching and region growing algorithms”, 3^rd European Workshop on Image Analysis for Multimedia Interactive Services, 2001 (invited) [PDF]
S. Liapis, E. Sifakis and G. Tziritas, “Color and/or texture segmentation using deterministic relaxation and fast marching algorithms”, Intl. Conference on Pattern Recognition, 2000 [PDF]
E. Sifakis and G. Tziritas, “Fast marching to moving object location”, Intl. Conference on Scale-Space Theories in Computer Vision, 1999 [PDF]

Or you can download my CV [here]