Mr. Hongzhi Song Profile

Hongzhi Song

at Univ of Ulster

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Proceedings Article | 9 June 2003 Paper

Visualising large hierarchies with Flextree

Hongzhi Song, Edwin Curran, Roy Sterritt

Proceedings Volume 5009, (2003) https://doi.org/10.1117/12.473916

KEYWORDS: Visualization, Computing systems, Computer programming, Information visualization, Information science, Switching, Visual analytics, Software engineering, Classification systems, Software

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One of the main tasks in Information Visualisation research is creating visual tools to facilitate human understanding of large and complex information spaces. Hierarchies, being a good mechanism in organising such information, are ubiquitous. Although much research effort has been spent on finding useful representations for hierarchies, visualising large hierarchies is still a difficult topic. One of the difficulties is how to show both tructure and node content information in one view. Another is how to achieve multiple foci in a focus+context visualisation. This paper describes a novel hierarchy visualisation technique called FlexTree to address these problems. It contains some important features that have not been exploited so far. In this visualisation, a profile or contour unique to the hierarchy being visualised can be gained in a histogram-like layout. A normalised view of a common attribute of all nodes can be acquired, and selection of this attribute is controllable by the user. Multiple foci are consistently accessible within a global context through interaction. Furthermore it can handle a large hierarchy that contains several thousand nodes in a PC environment. In addition results from an informal evaluation are also presented.

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