Conference Paper

Interactive Visual Classification with Euler Diagrams

DOI: 10.1109/VLHCC.2009.5295265 Conference: IEEE Symposium on Visual Languages and Human-Centric Computing, VL/HCC 2009, Corvallis, OR, USA, 20-24 September 2009, Proceedings
Source: DBLP

ABSTRACT We present the theoretical foundation, the design and the implementation
of a library, called EulerVC to interactively handle Euler diagrams
for the purposes of resource management. Fast on-line algorithms
to interpret wellformed diagrams have been developed utilising a
new notion of marked points to keep track of the zone sets. The interface
allows the construction of overlapping ellipses to represent categories
together with the drag and drop of resources in order to categorise
them. A visual indicator can be used to show if the diagram under
construction is not wellformed to assist in reducing user mistakes,
and sets of tags can be assigned to resources upon export. The generic
approach is demonstrated via an integration with the bookmarking
site del.icio.us.

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    ABSTRACT: Euler diagrams form the basis of various visual languages but tool support for creating them is generally limited to generic diagram editing software using mouse and keyboard interaction. A more natural and convenient mode of entry is via a sketching interface which facilitates greater cognitive focus on the task of diagram creation. Previous work has developed sketching interfaces for Euler diagrams drawn with ellipses. This paper presents SketchSet, the first sketch tool for Euler diagrams whose curves can be circles, ellipses, or arbitrary shapes. SketchSet allows the creation of formal diagrams via point and click interaction. The user drawn diagram, in sketched or formal format, is automatically converted to a diagram in the other format, thus maintaining both views. We provide a mechanism that allows semantic differences between the sketch and the formal diagram to be rectified automatically. Finally, we present a user study that evaluates the effectiveness of the tool.
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