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Interactive Direct Volume Rendering of Time-Varying Data

1 2 4 6 8 10 12 14 15 16

0 5 10 15 20 25

PV RLE 256 QG RLE 128 Brain RLE 256 QG RAW 128 PV RAW 256 Brain RAW 256

Number of processors

Frames per second

1 2 4 6 8 10 12 14

0 5 10 15 20 25

PV RLE 128 PV RAW 128 QG RLE 128 PV RLE 256 QG RAW 128 PV RAW 256

Number of processors

Frames per second

1 2 4 6 8

0.0 0.5 1.0 1.5 2.0 2.5 3.0

render gradient i_time

Number of processors

Time in seconds per frame

9.4 4.9

1 2 4 6

0 0.2 0.4 0.6 0.8 1 1.2 1.4

o_time render i_time

Number of processors

Time in seconds per frame

Plate 1: MRBrain (top), Polar Vortex data at time 50 (middle), and 400 (top)

Plate 2: QG data at time

100 (top), 499 (middle),

and 1492 (bottom)