Alex Rav-Acha

Computer Vision Lab
The Weizmann Institue
ravacha@gmail.com

Phones:
Lab: 972-8-9343021
Home :972-2-6421290
Cell. :0544-987455


 


I am currently doing a post-doc in the Weizmann Institue, working together with  


Projects and Demos

Unwrap Mosaics: A new representation for video editing.


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


Journal papers:

" 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.


Conference Papers:

" 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.



Book chapters:

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.



Technical Reports:

"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