Graphics Reference
In-Depth Information
−
0.6101
0.5428
0.5772
R
2
=
−
0.4169
0.3996
−
0.8164
−
0.6738
−
0.7387
−
0.0175
You'll need to convert from rotation matrices to quaternions and back.
7.13
Sketch how a mirror-based facial motion capture setup as mentioned in
Section
7.6
(sketched in Figure
7.28
) effectively creates multiple virtual
cameras. How can such a system be calibrated?
Figure 7.28.
A camera positioned above the per-
former's head views images of the face reflected
in three mirrors (one parallel to the image plane,
two at angles).
mirror
7.14 Provide sketches to show that (a) the visual hull cannot resolve concavities
and (b) the visual hull can be substantially larger than the actual object.
7.15
Sketch an eighth perspective of the human in Figure
7.26
that would carve
away the voxels protruding from the chest area.
