5.3. Face Carving Based on the Detected Mesh
Figure 8 shows examples of 3D carving based on the 3D
detection results with different detection errors. From the
second, third and fourth columns in the figure, we can see
that although the 3D detection obtains a correct view for the
fetal face, we do not obtain a satisfying rendering because
of the clouds and occlusions in front of them. Through carving,
the obstructions in front of the face are successfully removed
and a much better 3D view is rendered as shown in
the figure. The carving example at the bottom row of this
figure is based on the detected face mesh with a 6.22mm
error, which is still visually acceptable.