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CRV
2011
IEEE
309views Robotics» more  CRV 2011»
10 years 1 months ago
Optimal Alignment of 3D Data for Spatial Discretization
—We present an algorithm that finds the rotation which best aligns a given configuration of directions on an unsorted set of directions. Using a cost function that we derive in...
Benjamin Huhle, Timo Schairer, Andreas Schilling, ...
ICASSP
2011
IEEE
10 years 5 months ago
Simulating room impulse responses for spherical microphone arrays
A method is proposed for simulating the sound pressure signals on a spherical microphone array in a reverberant enclosure. The method employs spherical harmonic decomposition and ...
Daniel P. Jarrett, Emanuel A. P. Habets, Mark R. P...
PR
2007
170views more  PR 2007»
11 years 26 days ago
Conformal spherical representation of 3D genus-zero meshes
This paper describes an approach of representing 3D shape by using a set of invariant Spherical Harmonic (SH) coefficients after conformal mapping. Specifically, a genus-zero 3D ...
Hongdong Li, Richard I. Hartley
PAMI
2002
122views more  PAMI 2002»
11 years 1 months ago
Analytic PCA Construction for Theoretical Analysis of Lighting Variability in Images of a Lambertian Object
We analyze theoretically the subspace best approximating images of a convex Lambertian object taken from the same viewpoint, but under different distant illumination conditions. Si...
Ravi Ramamoorthi
MOC
2002
135views more  MOC 2002»
11 years 1 months ago
A fast spherical harmonics transform algorithm
The spectral method with discrete spherical harmonics transform plays an important role in many applications. In spite of its advantages, the spherical harmonics transform has a dr...
Reiji Suda, Masayasu Takami
DAGM
2001
Springer
11 years 5 months ago
3D Model Retrieval with Spherical Harmonics and Moments
We consider 3D object retrieval in which a polygonal mesh serves as a query and similar objects are retrieved from a collection of 3D objects. Algorithms proceed first by a normal...
Dietmar Saupe, Dejan V. Vranic
RT
2004
Springer
11 years 6 months ago
Spherical harmonic Gradients for Mid-Range Illumination
Spherical harmonics are often used for compact description of incident radiance in low-frequency but distant lighting environments. For interaction with nearby emitters, computing...
Thomas Annen, Jan Kautz, Frédo Durand, Hans...
ICMCS
2005
IEEE
104views Multimedia» more  ICMCS 2005»
11 years 7 months ago
Spherical Harmonics Descriptor for 2D-Image Retrieval
In this paper, spherical harmonics are proposed as shape descriptors for 2d images. We introduce the concept of connectivity; 2d images are decomposed using connectivity which is ...
Atul Sajjanhar, Guojun Lu, Dengsheng Zhang
ICCV
2005
IEEE
11 years 7 months ago
Non-Negative Lighting and Specular Object Recognition
Recognition of specular objects is particularly difficult because their appearance is much more sensitive to lighting changes than that of Lambertian objects. We consider an appr...
Sameer Shirdhonkar, David W. Jacobs
3DPVT
2006
IEEE
203views Visualization» more  3DPVT 2006»
11 years 7 months ago
A Spatio-Temporal Modeling Method for Shape Representation
The spherical harmonic (SPHARM) description is a powerful surface modeling technique that can model arbitrarily shaped but simply connected three dimensional (3D) objects. Because...
Heng Huang, Li Shen, Rong Zhang, Fillia Makedon, J...
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