Stefan Röttger

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Direct vs. Indirect Method: DVR absorption rendering (left), isosurface extraction by Marching Cubes Algorithm (right):

vs.

Iso surface is the set of points ot the data set that have the same iso value.
The point set forms a closed surface, which can be extracted and represented by a triangle mesh.

Advantages:

• Occlusion of hidden surfaces.
• Triangle mesh can be shaded.

Disadvantages:

• Not the entire data visible, only parts with a respective iso value.
• Mesh extraction is not interactive.

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