Exploratory visualization based on multidimensional transfer functions and star coordinates

Alex Laier BordignonRener CastroHélio LopesThomas LewinerGeovan Tavares

Exploration and analysis of multivariate data play an important role in different domains. This work proposes a simple interface prototype that allows a human user to vi- sually explore multivariate spatial objects, such as images, sequence of images or volume. It uses star coordinates as a widget to display the multivariate data on the computer 2D screen. The user then identifies a feature on this power- ful coordinate system by mapping a selected feature region on that widget to a color and opacity. As a visual result, the feature is rendered on the object?s space composing the use of this maps and the star coordinates projection. Some examples illustrate the potential of this interface.

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