Yarden Livnat

Research Associate
Scientific Computing and Imaging Research Group (SCI)

Research Projects:

Inverse problems:

Numerical Analysis:

Scientific Visualization:

Noise - a Near Optimal IsoSurface Extraction algorithm for large dataset. Noise was designed mainly for unstructured grids, though it is also near optimal for structured grids, and utilizes a new concept we call the Span Space. Noise is now part our computational steering SCIRun software and the parallel renderer at the Advance Computing Laboratory (ACL), Los Alamos National Laboratory.

These are images from two mpeg movies (1.8MB and 4MB) on Mantle Convection Modeling which was done on a Cray T3D supercomputer at the ACL using over 20 million finite elements. The first image shows a single, red, isosurface while the second has two isosurfaces, red and blue, and uses transparency. The third image shows a slice through the mantle with a single isosurface.

Publications

• Y. Livnat, S. G. Parker, C. R. Johnson Fast Isosurface Extraction Methods for Large Imaging Datasets Handbook of Medical Image Processing (a book chaper), (submitted).
• S. Parker, P. Shirley, Y. Livnat, C. Henson, P. Sloan. Interactive Ray Tracing for Volume Visualization IEEE Trans. Vis. Comp. Graphics (to appear).
• Y. Livnat NOISE, WISE and SAGE: Algorithms for Rapid Isosurface Extraction Ph.D Dissertation, Univeristy of Utah, Dec 1999
• Y. Livnat, C. Henson. View Dependent Isosurface Extraction IEEE Proceesings Visualization `98, pp. 175-180, Oct 1998.
• S. Parker, P. Shirley, Y. Livnat, C. Henson, P. Sloan. Interactive Ray Tracing for Isosurface Extraction IEEE Proceesings Visualization `98, pp. 233-238, Oct 1998.
• J.S.Painter, P.Bunge, Y. Livnat. Case Study: Mantle Convection Visualization on the Cray t3D IEEE Proceedings Visualization `96, pp. 409-412, 1996 ). (HTML version)
• H.W. Shen, C. Henson, Y. Livnat, C.R. Johnson. Isosurfacing in Span Space with Utmost Efficiency (ISSUE) IEEE Proceesings Visualization `96, pp. 287-294, 1996.
• C.R. Johnson, D.M. Beazley, Y. Livnat, S.G. Parker, J.A. Schmidt, H.W. Shen and D.M. Weinstein. Applications of large-scale computing and scientific visualization in medicine." International Journal on Supercomputer Applications and High Performance Computing, 34 pages, 1996 (to appear).
• Y. Livnat, H.W. Shen and C.R. Johnson. A near optimal isosurface extraction algorithm using the span space IEEE Trans. Vis. Comp. Graphics, vol. 2, no.1, pp. 73-84, 1996 .
• Y. Livnat. Layered Radiosity Texures Master Thesis, Hebrew University Jerusalem Israel, July 1991.