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34
After two mesh patches have been registered (e.g. using ICP), how are they integrated? Explain the two main approaches!
Given: Two aligned patches 
and 
with some overlap.
Zippering
Remove overlap: Shoot rays from vertices of in normal direction. Remove triangles of which are hit. Then, do the same thing the other way around.
Merge: Walk along the two new patch boundaries and insert triangles to connect them.
Problem: This approach throws away a significant amount of detail information near the overlap region.
Stitching
Move the boundary vertices of patch along their normals so they lie on .
Insert boundary vertices of patch into by splitting triangles.
Insert the boundary edges of patch into by splitting edges.
Remove the overlapping part of patch.
and with some overlap.Zippering
Remove overlap: Shoot rays from vertices of
in normal direction. Remove triangles of which are hit. Then, do the same thing the other way around.Merge: Walk along the two new patch boundaries and insert triangles to connect them.
Problem: This approach throws away a significant amount of detail information near the overlap region.
Stitching
Move the boundary vertices of patch
along their normals so they lie on .Insert boundary vertices of patch
into by splitting triangles.Insert the boundary edges of patch
into by splitting edges.Remove the overlapping part of patch
.
Flashcard info:
Author: janisborn
Main topic: Informatik
Topic: Computergrafik
School / Univ.: RWTH Aachen
City: Aachen
Published: 18.05.2022