Figure 4:
Probing and
Dual-Domain Interaction:
(a) shows probe at the
pulp-dentin boundary. Notice the arc formed by the
re-projected voxel in the
transfer function widget.
(b) shows the probe passing
through the dentin interior.
The boundary between
dentin and background
is shown in (c); the reprojected voxel again forms
the arc characteristic of a
clean boundary. In (a) and
(c) dual-domain interaction
allowed “painting” localized
regions of opacity.
(a) Pulp-dentin Boundary
(b) Dentin Interior
(c) Dentin Boundary
Figure 5: Direct Manipulation Widgets: bone surface in (a) is visualized using a triangular classification widget, skin is captured using the data probe
at the boundary between air
and skin, while a clipping
plane exposes a slice of the
data and the interior of the
skull. In (b), the probe is
within the soft tissue interior.
The transfer function in (c)
demonstrates the results of
dual domain interaction using the surface of the clipping plane for probing.
(a) Bone emphasized
(b) Probe in Soft Tissue
(c) Skin emphasized
Figure 8: Results of using
the “default” 3D transfer
function. The skin and surrounding material are visible in (a); the cutting plane
in (b) shows that the skull
and teeth were also emphasized. Changing hue linearly with data value helps
distinguish between different material boundaries.
(a) Whole volume
(b) With cutting plane