Mr. Jiann-Liang Chen Profile

Jiann-Liang Chen

at Univ of California Davis

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Proceedings Article | 9 June 2003 Paper

Normalized-cut algorithm for hierarchical vector field data segmentation

Jiann-Liang Chen, Zhaojun Bai, Bernd Hamann, Terry Ligocki

Proceedings Volume 5009, (2003) https://doi.org/10.1117/12.477521

KEYWORDS: Visualization, Computer science, Matrices, 3D metrology, Image processing algorithms and systems, Data centers, Image segmentation, Image processing, Scientific research, Data visualization

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In the context of vector field data visualization, it is often desirable to construct a hierarchical data representation. One possibility to construct a hierarchy is based on clustering vectors using certain similarity criteria. We combine two fundamental approaches to cluster vectors and construct hierarchical vector field representations. For clustering, a locally constructed linear least-squares approximation is incorporated into a similarity measure that considers both Euclidean distance between point pairs (for which dependent vector data are given) and difference in vector values. A modified normalized cut (NC) method is used to obtain a near-optimal clustering of a given discrete vector field data set. To obtain a hierarchical representation, the NC method is applied recursively after the construction of coarse-level clusters. We have applied our NC-based segmentation method to simple, analytically defined vector fields as well as discrete vector field data generated by turbulent flow simulation. Our test results indicate that our proposed adaptation of the original NC method is a promising method as it leads to segmentation results that capture the qualitative and topological nature of vector field data.

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