Die Arbeitsgruppe zieht um!

Wir wechseln im Wintersemester 2021/22 an die Universität Bamberg. Ab 15. Oktober 2021 übernimmt Fabian Beck den dortigen Lehrstuhl für Informationsvisualisierung.

Neue Webseite der Arbeitsgruppe: https://www.uni-bamberg.de/vis


Publikationen der Arbeitsgruppe, die seit 2016 erschienen sind. Frühere Publikationen von Fabian Beck sind auf Google Scholar oder DBLP zu finden.

Generalized Pythagoras Trees: A Fractal Approach to Hierarchy Visualization

Art der Publikation: Beitrag in Sammelwerk

Generalized Pythagoras Trees: A Fractal Approach to Hierarchy Visualization

Beck, Fabian; Burch, Michael; Munz, Tanja; Di Silvestro, Lorenzo; Weiskopf, Daniel
Battiato, Sebastiano; Coquillart, Sabine; Pettré, Julien; Laramee, Robert S.; Kerren, Andreas; Braz, José
Titel des Sammelbands:
Computer Vision, Imaging and Computer Graphics - Theory and Applications, VISIGRAPP 2014, Revised Selected Papers
Digital Object Identifier (DOI):
Generalized Pythagoras Trees: A Fractal Approach to Hierarchy Visualization (5.52 MB)
Download BibTeX


Through their recursive definition, many fractals have an inherent hierarchical structure. An example are binary branching Pythagoras Trees. By stopping the recursion in certain branches, a binary hierarchy can be encoded and visualized. But this binary encoding is an obstacle for representing general hierarchical data such as file systems or phylogenetic trees, which usually branch into more than two subhierarchies. We hence extend Pythagoras Trees to arbitrarily branching trees by adapting the geometry of the original fractal approach. Each vertex in the hierarchy is visualized as a rectangle sized according to a metric. We analyze several visual parameters such as length, width, order, and color of the nodes against the use of different metrics. Interactions help to zoom, browse, and filter the hierarchy. The usefulness of our technique is illustrated by two case studies visualizing directory structures and a large phylogenetic tree. We compare our approach with existing tree diagrams and discuss questions of geometry, perception, readability, and aesthetics.