Alex Rav-Acha
Computer
Vision Lab
Phones: |
I am currently doing a post-doc 
Projects and Demos
Video Synopsis: Get the whole day in a minute.
Video Warping: Zoom into the dnuks !.
Dynamosaicing: Panoramic Movies and other Time manipulations.
Minimal Aspect Distortion (MAD) Mosaicing of Long Scenes.
Spectral Matting.
Publications
"
Unwrap Mosaics: A new representation for video editing"
A. Rav-Acha, P. Kohli, C. Rother, A.W. Fitzgibbon
ACM Transactions on Graphics (SIGGRAPH 2008),
Project Page.
"
Nonchronological Video Synopsis and Indexing",
Y. Pritch, A. Rav-Acha and S. Peleg
IEEE Trans. PAMI, vol. 30, no. 11, pp. 1971-1984, Nov. 2008.
Click here for a Demo.
"
Minimal Aspect Distorsion (MAD) Mosaicing of Long
Scenes",
A. Rav-Acha, G. Engel and S. Peleg
To appear in IJCV.
Click here for a Demo.
"
Dynamosaicing: Mosaicing of Dynamic Scenes",
A. Rav-Acha, Y. Pritch, D. Lischinski and S. Peleg
IEEE Trans. PAMI, 2007, in press.
Click here for a Demo.
"Two motion blurred images are better than one",
A. Rav-Acha and S. Peleg
Pattern Recognition Letters, Vol 26, pp. 311-317, 2005.
"Mosaicing
on Adaptive Manifolds", 
S. Peleg,
B. Rousso, A. Rav-Acha and
A. Zomet
IEEE Transactions on Pattern
Analysis and Machine Intelligence (PAMI), Vol 22, No 10,
October 2000.
"
High Resolution Matting via Interactive Trimap Segmentation",
C. Rhemann, C. Rother, A. Rav-Acha, T. Sharp.
CVPR 2008, Alaska, June 2008
"
Webcam Synopsis: Peeking Around the World",
Yael Pritch, Alex Rav-Acha, Avital Gutman and Shmuel Peleg.
ICCV 2007, Rio
de Janeiro, Oct 2007
Click here for a Demo
"
Spectral Matting",
-- Best
paper
award runner up. --
Anat Levin, Alex Rav-Acha and Dani Lischinski.
IEEE Conf. on Computer Vision and Pattern Recognition (CVPR), Minneapolis, June 2007
Project Page (Including ground truth matting evaluation data)
"Lucas Kanade Without Iterative Warping",
A. Rav-Acha and S. Peleg
ICIP'06, Atlanta, October 2006.
Click here for more details (Hebrew University Technical Report HUJI-CSE-LTR-2006-39, May 2006).
"Making a Long Video Short: Dynamic Video Synopsis",
A. Rav-Acha and Y. Pritch and S. Peleg
CVPR'06, New York, June 2006, pp. 435- 441.
Click here for a Demo.
"Online Registration of Dynamic Scenes using Video Extrapolation",
A. Rav-Acha and Y. Pritch and S. Peleg
Workshop on Dynamical Vision at ICCV'05, Beijing, October 2005. In Dynamical Vision, LNCS 5358, pp. 151-164, Springer, 2007
"Dynamosaicing: Video mosaics with non-chronological time",
A. Rav-Acha, Y. Pritch, D. Lischinski, S. Peleg
CVPR'05, San Diego, June 2005, pp. 58-65.
Click here for a Demo.
"A Unified Approach for Motion Analysis and View Synthesis",
A. Rav-Acha and S. Peleg
Second IEEE International Symposium on 3D Data Processing, Visualization, and Transmission (3DPVT), Thessaloniki, Greece, September 2004.
"Mosaicing with Parallax using Time Warping",
A. Rav-Acha, Y. Shor and S. Peleg
IVR (In conjunction with the CVPR'04) , Washington, DC, July 2004.
"Robust Super
Resolution",
A. Zomet,
A. Rav-Acha and S. Peleg
CVPR'01, Hawaii, December 2001, Vol. I, pp. 645-650.
"Restoration of
Multiple Images with Motion Blur in Different Directions",
A. Rav-Acha
and S. Peleg
WACV'00, Palm-Springs, Dec. 2000, pp. 22-28.
"Universal Mosaicing using Pipe Projection",
B. Rousso,
S. Peleg, I. Finci, and A. Rav-Acha
ICCV'98, pp. 945-952, Bombay,
January 1008.
S. Peleg, B. Rousso, A. Rav-Acha, and A. Zomet. Mosaicing
with strips on adaptive manifolds.
In R. Benosman and S.B.
Kang, editors, Panoramic
Vision: Sensors, Theory, and Applications,
pages 322–339.
Springer Verlag, March 2001.
"Evolving Time Fronts: Spatio-Temporal Video Warping",
A. Rav-Acha , Y. Pritch , D. Lischinski , S. Peleg
Hebrew University Technical Report HUJI-CSE-LTR-2005-10,
April 2005.
Click here for a Demo.
Thesis:
Msc. Thesis: Restoration of
Multiple Images with Motion Blur in Different Directions
Phd. Thesis: Spatio-Temporal Editing of Videos