Image Processing Reference
In-Depth Information
Chapter 13
Glyph-Based Multi-field Visualization
David H.S. Chung, Robert S. Laramee, Johannes Kehrer
and Helwig Hauser
Abstract
In this chapter, we present a state of the art on glyph-based visualization
techniques that address the complex challenges of multi-field visualization. Glyphs
are discrete parametrized visualization objects that encode multiple data values based
on appearance (i.e., visual channels) such as size, shape, color, and opacity, and are
effective for conveying multiple fields of data simultaneously. We provide a cate-
gorization of these techniques with the aim for an informative overview of recent
literature. Our categorization is based on visual channels utilized by the glyph for
mapping each data attribute, and the spatial dimensionality of the glyph-based visu-
alization. We also discuss critical design aspects of glyph-based visualization to deal
with the perceptual challenges inherent with this approach.
13.1 Introduction
The visualization of data that are given as fields of values is a classical topic in
visualization research. A substantial amount of relevant work has been done, offering
a wealth of well-proven techniques for revealing insight into such data fields. When
visualizing multiple fields of data that co-exist with respect to a joint domain of
reference, additional challenges are faced. On the one hand, there is a
technological
challenge
of how to realize a visualization mapping that can reveal multiple fields
of data at a time. On the other hand, there is a
perceptual challenge
of how easy it is
to understand and correctly interpret such a visualization.
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R.S. Laramee
Swansea University, Swansea, UK
e-mail: d.h.s.Chung@swansea.ac.uk
J. Kehrer
D.H.S. Chung
H. Hauser
University of Bergen, Bergen, Norway
e-mail: helwig.hauser@uib.no
·
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