Image Processing Reference
In-Depth Information
one data set and the black squares show the other data set. The attribute block by
Miller [
68
] allows a simultaneous comparison of four data sets. A repeating 2
×
2
pattern provides a shared border between all four data sets. An extension to this
approach is the comparative visualization technique of Malik et al. [
64
]. Instead of
a rectangular pattern a hexagonal pattern is used to more finely subdivide the image
space. This allows the comparison of a larger number of data sets to one central data
set since the hexagonal pattern can be subdivided according to the number of data
sets to compare. Uncertainty of a measurement, simulation, or process provides an
additional data stream which generates further visualization challenges. Uncertainty
may be shown at discrete positions through glyphs or icons. For a dense representa-
tion of uncertainty, comparative visualization seems to be a promising emerging area.
Topics of research will be: integrated views; sparsification of many data sets which
shall be shown simultaneously; comparative navigation; visualization of competing,
contradictive, or conflicting features.
Acknowledgments
The authors gratefully acknowledge research support from the National Sci-
ence Foundation, Department of Energy, the National Institutes of Health, and the King Abdullah
University for Science and Technology.
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