Sampling theorems and compressive sensing on the sphere
We discuss a novel sampling theorem on the sphere developed by McEwen & Wiaux recently through an association between the sphere and the torus. To represent a band-limited signal exactly, this new sampling theorem requires less than half the number of samples of other equiangular sampling theorems on the sphere, such as the canonical Driscoll & Healy sampling theorem. A reduction in the number of samples required to represent a band-limited signal on the sphere has important implications for compressive sensing, both in terms of the dimensionality and sparsity of signals. We illustrate the impact of this property with an inpainting problem on the sphere, where we show superior reconstruction performance when adopting the new sampling theorem.
WOS:000297583100038
2011
Proceedings of SPIE
8138 81381F-1
REVIEWED
EPFL
| Event name | Event place | Event date |
San Diego, CA | August 21-25, 2011 | |