Exploratory visualization based on multidimensional transfer functions and star coordinates Alex Laier Bordignon, Rener Castro, Hélio Lopes, Thomas Lewiner and Geovan Tavares Department of Mathematics – PUC-Rio

2 /12 Introduction/Motivation How to analize multi-dimensional data in 2D ?

3 /12 Star Coordinates

4 /12 Star coordinates analysis 1) project the points 2) generate the density map

5 /12 Interactive axis choice

6 /12 Giving weight to an axis

7 /12 Multidimensional transfer functions Six dimensional space Map to color space Transfer function

8 /12 Real time feedback Painting the clusters, interactively building a transfer function

9 /12 Results

10 /12 Results

11 /12 Results

12 /12 Next steps Next steps Automatic cluster detection GPU Improved paint tools Best projection computation

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