School of
Information Technology and Electrical Engineering

Joint Contour Nets: Theory and Applications

Dr Hamish Carr & Dr David Duke, University of Leeds UKMon, 25/02/2013 - 10:00
Prof Jane Hunter

As scientific data sets increase in size and complexity, scientific visualization increasingly depends on formal analysis of the data. One of the most successful forms of analysis uses computational topology to analyse properties such as minima, maxima, thresholds, ridges and flow. To date, however, these methods have been applied to univariate (scalar) fields and to vector fields, but not to the more general case of multivariate fields. Contour Trees and Reeb Graphs are often used for analysing univariate (scalar) fields. We generalize this analysis to multivariate fields with a data structure called the Joint Contour Net (JCN) that quantizes the variation of multiple properties simultaneously. We report the first algorithm for constructing the Joint Contour Net, and demonstrate some of its fundamental properties. Based on this, we describe initial results from applying the JCN to an open problem in the understanding of nuclear fission. These results, and ongoing collaboration, is aiding scientists in understanding a fundamental physical phenomenon.


Dr Hamish Carr completed his PhD at the University of British Columbia in May 2004 and has worked as a lecturer at University College Dublin and a senior lecturer at the University of Leeds. His research interests include scientific and medical visualization, computational geometry and topology, computer graphics and geometric applications. He has recently taken on the role of Chapter Chair for Eurographics UK.

Dr David Duke is a Reader in Visualization, and Head of the School of Computing at the University of Leeds. He completed his PhD at The University of Queensland in 1992, working on the semantics of the Object-Z language. Since moving to the UK, his research focus has been in scientific visualization. He is a long-standing member of the Eurographics executive, was editor of "Computer Graphics Forum" for eight years, and chair of the EuroVis 2005 Symposium. He is a member of the IEEE, and a Fellow of the Eurographics Association.

Seminar Type: 

ITEE Research Seminar