TY  - JOUR
AU  - Brokman, Jonathan
AU  - Burger, Martin
AU  - Gilboa, Guy
TI  - Spectral Total-Variation Processing of Shapes - Theory and Applications
JO  - ACM transactions on graphics
VL  - 43
IS  - 2
SN  - 0730-0301
CY  - New York, NY [u.a.]
PB  - ACM
M1  - PUBDB-2024-04870
M1  - arXiv:2209.07517
SP  - 3641845
PY  - 2024
N1  - Green open access version at arxiv, https://arxiv.org/abs/2209.07517
AB  - We present a comprehensive analysis of total variation (TV) on non-Euclidean domains and its eigenfunctions. We specifically address parameterized surfaces, a natural representation of the shapes used in 3D graphics. Our work sheds new light on the celebrated Beltrami and Anisotropic TV flows and explains experimental findings from recent years on shape spectral TV [Fumero et al. 2020] and adaptive anisotropic spectral TV [Biton and Gilboa 2022]. A new notion of convexity on surfaces is derived by characterizing structures that are stable throughout the TV flow, performed on surfaces. We establish and numerically demonstrate quantitative relationships between TV, area, eigenvalue, and eigenfunctions of the TV operator on surfaces. Moreover, we expand the shape spectral TV toolkit to include zero-homogeneous flows, leading to efficient and versatile shape processing methods. These methods are exemplified through applications in smoothing, enhancement, and exaggeration filters. We introduce a novel method that, for the first time, addresses the shape deformation task using TV. This deformation technique is characterized by the concentration of deformation along geometrical bottlenecks, shown to coincide with the discontinuities of eigenfunctions. Overall, our findings elucidate recent experimental observations in spectral TV, provide a diverse framework for shape filtering, and present the first TV-based approach to shape deformation.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001208809900009
DO  - DOI:10.1145/3641845
UR  - https://bib-pubdb1.desy.de/record/611250
ER  -