Publications by year Most documents on this website are protected by copyright.
By clicking on a PDF icon, you confirm that you or your institution
has the right to do so. Note that the definitive versions of all EG papers (Eurographics,...) can be downloaded from http://www.eg.org/EG/DL. ACM papers (Siggraph, ...) can be downloaded from http://www.acm.org/dl/. “Spectral Geometry Processing with Manifold Harmonics” Bruno Vallet and Bruno Lévy Computer Graphics Forum (Proceedings Eurographics), 2008 Abstract: We present an explicit method to compute a generalization of the Fourier Transform on a mesh. It is well known that the eigenfunctions of the Laplace Beltrami operator (Manifold Harmonics) define a function basis allowing for such a transform. However, computing even just a few eigenvectors is out of reach for meshes with more than a few thousand vertices, and storing these eigenvectors is prohibitive for large meshes. To overcome these limitations, we propose a bandbyband spectrum computation algorithm and an outofcore implementation that can compute thousands of eigenvectors for meshes with up to a million vertices. We also propose a limitedmemory filtering algorithm, that does not need to store the eigenvectors. Using this latter algorithm, specific frequency bands can be filtered, without needing to compute the entire spectrum. Finally, we demonstrate some applications of our method to interactive convolution geometry filtering. These technical achievements are supported by a solid yet simple theoretic framework based on Discrete Exterior Calculus (DEC). In particular, the issues of symmetry and discretization of the operator are considered with great care. BibTex reference @ARTICLE{vallet:MH:2008,
AUTHOR = "Bruno Vallet and Bruno Lévy",
TITLE = "Spectral Geometry Processing with Manifold Harmonics",
JOURNAL = "Computer Graphics Forum (Proceedings Eurographics)",
YEAR = "2008",
}
Supplemental material, links, hindsight ...
See also our book
Polygon Mesh Processing , Botsch, Kobbelt, Pauly, Alliez and Levy,
AK Peters. Chapter 3 (Differential Geometry) and Chapter 4 (Smoothing,
Fourrier transform and Manifold Harmonics, diffusion flow, fairing
...).
Resources
[Download Presentation]
[Download Demo]
(Windows executable)
See also the implementation in
Graphite (Manifold
Harmonics plugin).
See also our
SMI 2006 paper
.
This paper previously appeared as a
tech report ,
with the derivations in FEM (Finite Elements Modeling) instead of DEC
(Discrete Exterior Calculus). This gives the same result in the end.
Both are interesting: DEC derivations are shorter, FEM derivations
are more selfcontained.
Resources on LaplaceBelatrami and DEC
(some of them suggested by Ramsay Dyer)
Further reading:
Manifold learning
Spectral geometry processing
 Dong, Bremer, Garland, Pascucci and Hart's approach (techreport cited in the paper) was
improved by the authors (quadrangulation using the quasidual) and published at Siggraph 2006. See
this link
for the paper.
 An interesting application of spectral analysis to robust surface
reconstruction by Kolluri, Shewchuk and O'Brien : see this link.
 Still about robust surface reconstruction, a paper
by Alliez, CohenSteiner, Tong and Desbrun with an elegant
"tensor voting" idea
.
 ... and from the same group (Mullen, Tong, Alliez and Desbrun),
a paper about
spectral conformal parameterization .

A Robust Spectral Approach for Blind Watermarking of Manifold
Surfaces
, Yang Liu, Balakrishnan Prabhakaran, Xiaohu Guo, ACM Multimedia
& Security Workshop (MMSEC 2008)

Spectral mesh deformation ,
Guodong Rong, Yan Cao, Xiaohu Guo, The Visual Computer, 2008.
 see also Xiaohu
Guo's webpage
Other references

