Title: Uncertain Isocontours


Almost all scientific data is affected by uncertainty. Visualization techniques that consider uncertainties therefore are urgently needed. In this talk I will focus on scalar fields as input data. For analysis of such fields, usually topological or geometrical features are extracted and displayed. The most prominent features in scalar fields are isocontours. A means to describe how errors in the input data are amplified during feature extraction is numerical condition. Applying this to isocontours, the sensitivity of isocontours to changes in the input data can be computed and displayed. Furthermore, the average condition number can aid the selection of isovalues that correspond to isocontours that are particularly robust.

TASC 1 9204W
Thursday, July 15, 2010 - 13:30

Title: Scalable Visualization in Oil/Gas Reservoir Exploration & Production


Oil and gas reservoir Exploration and Production (E&P) involve complex tasks, datasets and workflows from three main groups of inter-related disciplines: geophysics, geology and reservoir & production engineering. Visualization technology has been a key component of the increased success and efficiency across these disciplines and in all states of the field development cycle. Advances in the fields of scientific visualization, computer graphics, human-computer interaction and high-performance computing have enabled a significantly large range of reservoir visualization tasks. Today, visualization technology in oil/gas reservoir E&P faces great challenges due to the intersection of these advances with higher level of access to data application and integration, increasingly large and complex datasets, higher-degrees of uncertainty, and multi disciplinary collaborative decision-making.

TASC I 9204 - West
Thursday, May 20, 2010 - 13:30


Title: Beyond the digital divide - Ten good reasons for using splines


"Think analog, act digital" is a motto that is relevant to scientific computing and algorithm design in a variety of disciplines, including numerical analysis, image/signal processing, and computer graphics. Here, we will argue that cardinal splines constitute a theoretical and computational framework that is ideally matched to this philosophy, especially when the data is available on a uniform grid. We show that multidimensional spline interpolation or approximation can be performed most efficiently using recursive digital filtering techniques.

IRMACS Theatre, ASB 10900
Friday, April 9, 2010 - 22:42

Title: Why are Graphics Systems so Fast?


Over the last decade graphics hardware has become a key component of mobile and personal computers. Most programmers understand CPUs well, but have a limited understanding of GPUs (Graphics Processing Units). GPUs are viewed as specialized hardware optimized for rendering. That view is not accurate. Instead, they are best characterized as parallel computers that combine many cores, many threads, and wide vector processing units. In this talk, I will describe the architectures of different GPUs built by AMD, NVIDIA and Intel (the new Larrabee processor). I will also discuss the programming models that are used to achieve high performance on such heterogeneous architectures. The innovative combination of processor design and programming model are why graphics systems are so fast.

IRMACS Theatre, ASB 10900
Tuesday, March 9, 2010 - 13:30

In the Euclidean plane, a Delaunay triangulation can be characterized by the requirement that the circumcircle of each triangle be empty of vertices of all other triangles. For triangulating a surface S in R^3, the Delaunay paradigm has typically been employed in the form of the restricted Delaunay triangulation, where the empty circumcircle property is defined by using the Euclidean metric in R^3 to measure distances on the surface. More recently, the intrinsic (geodesic) metric of S has also been employed to define the Delaunay condition.

Bennett Library Room 2020
Tuesday, February 9, 2010 - 15:00
Presenter: Joe Kahlert
TASC1 9204 West
Wednesday, May 20, 2009 - 13:30
M.Sc. Project Defense and Seminar: Testing the Usability of Microsoft Photosynth, an Application with a Complex and Unfamiliar Conceptual Model - Chirag Xerxes Vesuvala 
Presenter: Chirag Xerxes Vesuvala 
ASB 9896
Tuesday, March 24, 2009 - 16:21
Presenter: Rong Liu 
TASC1 9204 West
Friday, March 20, 2009 - 13:30
Presenter: Bernhard Finkbeiner 
Two main tasks in the field of volumetric image processing are acquisition and visualization of 3D data. The main challenge is to reduce processing costs, while maintaining high accuracy.
TASC 1 8002
Tuesday, March 17, 2009 - 13:30
Vivarium/CS Seminar: Barycentric Coordinates, Energy Functions and Shape Deformation - Craig Gotsman (Technion Israel Institute of Technology) 
Wednesday, February 25, 2009 - 13:30
This week we will welcome professor Shewchuk from U.C. Berkeley. He is a successfull SFU alumni and we are proud to have him back at SFU for a short visit. He will meet some GrUVi students to discuss ongoing research and he will also give a talk within the PIMS-talk series. Details follow.

Dr. Jonathan Shewchuk University of California, Berkeley
"Tetrahedral Meshes with Good Dihedral Angles"

IRMACS Centre Theatre
Friday, November 28, 2008 - 15:00

CS/VIVARIUM: 3D Geometry Reconstruction from Image Data and biomedical Applications - Hans-Christian Hege (Zuse Institute Berlin (ZIB)) 

TASC 9204 West
Thursday, July 31, 2008 - 14:30

Some recent advances in visual computing - Daniel Cohen-Or (Tel-Aviv University)

TASC 9204 West
Thursday, July 24, 2008 - 14:30
Polyharmonic Wavelets --- From Isotropy to Steerability.
TASC 9204 West
Friday, July 11, 2008 - 13:30
TASC 9204 West
Friday, June 27, 2008 - 14:30
Presenter: Brendan Moloney 
TASC1 8002
Tuesday, June 24, 2008 - 13:30

Presenter: Simon Lucey (Carnegie Mellon University) 

TASC-1 9204
Wednesday, June 11, 2008 - 13:30
CS/VIVARIUM Seminar: "Rendering and Interacting with Large Scale Volumetric Data for Medical Applications"
TASC 9204 West
Thursday, January 31, 2008 - 13:30