Winding Numbers on Discrete Surfaces
Winding Numbers on Discrete Surfaces
复制标题
离散表面上的绕组数
DOI:
10.1145/3592401
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发表时间:
2023
影响因子:
6.2
通讯作者:
Crane, Keenan
中科院分区:
文献类型:
--
作者:
Feng, Nicole;Gillespie, Mark;Crane, Keenan
In the plane, thewinding numberis the number of times a curve wraps around a given point. Winding numbers are a basic component of geometric algorithms such as point-in-polygon tests, and their generalization to data with noise or topological errors has proven valuable for geometry processing tasks ranging from surface reconstruction to mesh booleans. However, standard definitions do not immediately apply on surfaces, where not all curves bound regions. We develop a meaningful generalization, starting with the well-known relationship between winding numbers and harmonic functions. By processing the derivatives of such functions, we can robustly filter out components of the input that do not bound any region. Ultimately, our algorithm yields (i) a closed, completed version of the input curves, (ii) integer labels for regions that are meaningfully bounded by these curves, and (iii) the complementary curves that do not bound any region. The main computational cost is solving a standard Poisson equation, or for surfaces with nontrivial topology, a sparse linear program. We also introduce special basis functions to represent singularities that naturally occur at endpoints of open curves.
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DOI:
10.1145/3478513.3480522
发表时间:
2021-06
期刊:
ACM Transactions on Graphics (TOG)
影响因子:
--
作者:
M. Gillespie;Nicholas Sharp;Keenan Crane
通讯作者:
M. Gillespie;Nicholas Sharp;Keenan Crane
DOI:
10.1145/3414685.3417839
发表时间:
2020-11
期刊:
ACM Transactions on Graphics (TOG)
影响因子:
--
作者:
Nicholas Sharp;Keenan Crane
通讯作者:
Nicholas Sharp;Keenan Crane
DOI:
--
发表时间:
2016
期刊:
Comput. Aided Des.
影响因子:
--
作者:
Konstantin Poelke;K. Polthier
通讯作者:
K. Polthier
DOI:
--
发表时间:
1963
期刊:
影响因子:
--
作者:
B. Reinhart
通讯作者:
B. Reinhart
DOI:
--
发表时间:
2021
期刊:
IEEE International Conference on Computer Vision
影响因子:
--
作者:
Cheng Chi;Shuran Song
通讯作者:
Shuran Song