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Preint08_1 - What we will cover Contour Tracking Surface...

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1 1 What we will cover Contour Tracking Surface Rendering Direct Volume Rendering Isosurface Rendering Optimizing DVR Pre-Integrated DVR 2 Image Quality Depends on Sampling Rate OTF variance OTF*Sampling Rate Really nothing?
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2 3 Ray-Integration Discrete approximation of volume rendering integral will converge against correct result 4 High-Frequency TFs High frequencies in the transfer function T increase required sampling rate x s T(s) x T(s (x) ) s(x)
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3 5 High-Frequency TFs 64 data slices 10 times more slices s T(s) 6 High-Frequency TFs
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4 7 Idea: Pre-Integrated Classification slab-by-slab rendering slice-by-slice slab-by-slab Pre-Integrated Volume Rendering 8 pre-integrate all possible combinations in the TF Pre-Integrated Classification s f s b store integral into table s f s b d front slice back slice Assume constant sampling distance d s b s f
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5 9 s f s b project slice s f s b front slice back slice Pre-Integrated Volume Rendering 10 s f s b slice s f s b Pre-Integrated Volume Rendering fetch s f and s b during rasterization utilize s f and s b as texture coordinates for the dependent texture
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6 11 Pre-integrated Transfer Function d d x s x s c D 0 0 ' ))) ' ( ( exp ) ( ( ~ D 0 Image Plane d e x color D I D 0 ) , 0 ( )) ( ( ) , 0 ( sampled density 12
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