#### Filter Results:

- Full text PDF available (48)

#### Publication Year

1958

2017

- This year (3)
- Last 5 years (29)
- Last 10 years (47)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

- Hamish Carr, Jack Snoeyink, Ulrike Axen
- Comput. Geom.
- 2000

We show that contour trees can be computed in all dimensions by a simple algorithm that merges two trees. Our algorithm extends, simplifies, and improves work of Tarasov and Vyalyi and of van Kreveld et al.

- Hamish Carr, Jack Snoeyink, Michiel van de Panne
- IEEE Visualization
- 2004

The contour tree, an abstraction of a scalar field that encodes the nesting relationships of isosurfaces, can be used to accelerate isosurface extraction, to identify important isovalues for volume-rendering transfer functions, and to guide exploratory visualization through a flexible isosurface interface. Many real-world data sets produce unmanageably… (More)

- Hamish Carr, Jack Snoeyink
- VisSym
- 2003

- Carlos Eduardo Scheidegger, John M. Schreiner, Brian Duffy, Hamish Carr, Cláudio T. Silva
- IEEE Transactions on Visualization and Computer…
- 2008

Recent results have shown a link between geometric properties of isosurfaces and statistical properties of the underlying sampled data. However, this has two defects: not all of the properties described converge to the same solution, and the statistics computed are not always invariant under isosurface-preserving transformations. We apply Federer's Coarea… (More)

- Gunther H. Weber, Scott E. Dillard, Hamish Carr, Valerio Pascucci, Bernd Hamann
- IEEE Transactions on Visualization and Computer…
- 2007

Topology provides a foundation for the development of mathematically sound tools for processing and exploration of scalar fields. Existing topology-based methods can be used to identify interesting features in volumetric data sets, to find seed sets for accelerated isosurface extraction, or to treat individual connected components as distinct entities for… (More)

- Hamish Carr, Brian Duffy, Brian Denby
- IEEE Transactions on Visualization and Computer…
- 2006

In this paper, we show that histograms represent spatial function distributions with a nearest neighbour interpolation. We confirm that this results in systematic underrepresentation of transitional features of the data, and provide new insight why this occurs. We further show that isosurface statistics, which use higher quality interpolation, give better… (More)

- Hamish Carr, Thomas Theußl, Torsten Möller
- VisSym
- 2003

Volumetric samples on Cartesian lattices are less efficient than samples on body-centred cubic (BCC) lattices. We show how to construct isosurfaces on BCC lattices using several different algorithms. Since the mesh that arises from BCC lattices involves a large number of cells, we show two alternate methods of reducing the number of cells by clumping… (More)

- Hamish Carr, Torsten Möller, Jack Snoeyink
- IEEE Visualization
- 2001

We review several schemes for dividing cubical cells into simplices (tetrahedra) in 3-D for interpolating from sampled data to IR<sup>3</sup> or for computing isosurfaces by barycentric interpolation. We present test data that reveal the geometric artifacts that these subdivision schemes generate, and discuss how these artifacts relate to the filter kernels… (More)

- Hamish Carr, David J. Duke
- IEEE Transactions on Visualization and Computer…
- 2014

Contour Trees and Reeb Graphs are firmly embedded in scientific visualization for analysing univariate (scalar) fields. We generalize this analysis to multivariate fields with a data structure called the Joint Contour Net that quantizes the variation of multiple variables simultaneously. We report the first algorithm for constructing the Joint Contour Net,… (More)

- Gunnar Johansson, Hamish Carr
- CASCON
- 2006

Medical imaging and scientific simulation produce large volumetric datasets, which are often visualized by isosurface extraction and rendering. This extracts individual surfaces from the volume to represent significant boundaries in the volume. The standard isosurface extraction method, Marching Cubes, generates a triangulated approximation of the… (More)