SIAM Journal on Numerical Analysis
Uncertainty principles and signal recovery
SIAM Journal on Applied Mathematics
Signal extrapolation in wavelet subspaces
SIAM Journal on Scientific Computing
On theory and regularization of scale-limited extrapolation
Signal Processing
On the regularization of Fredholm integral equations of the first kind
SIAM Journal on Mathematical Analysis
Computation of Gauss-type quadrature formulas
Journal of Computational and Applied Mathematics - Special issue on numerical analysis 2000 Vol. V: quadrature and orthogonal polynomials
Journal of Computational Physics
Uniform Uncertainty Principle and Signal Recovery via Regularized Orthogonal Matching Pursuit
Foundations of Computational Mathematics
Fractal image coding as projections onto convex sets
ICIAR'06 Proceedings of the Third international conference on Image Analysis and Recognition - Volume Part I
IEEE Transactions on Information Theory
Near-Optimal Signal Recovery From Random Projections: Universal Encoding Strategies?
IEEE Transactions on Information Theory
Fractal-wavelet image denoising revisited
IEEE Transactions on Image Processing
Hi-index | 0.09 |
We consider a rather simple algorithm to address the fascinating field of numerical extrapolation of (analytic) band-limited functions. It relies on two main elements: namely, the lower frequencies are treated by projecting the known part of the signal to be extended onto the space generated by ''Prolate Spheroidal Wave Functions'' (PSWF, as originally proposed by Slepian), whereas the higher ones can be handled by the recent so-called ''Compressive Sampling'' (CS, proposed by Candes) algorithms which are independent of the largeness of the bandwidth. Slepian functions are recalled and their numerical computation is explained in full detail, whereas @?^1 regularization techniques are summarized together with a recent iterative algorithm which has been proved to work efficiently on so-called ''compressible signals'', which appear to match rather well the class of smooth bandlimited functions. Numerical results are displayed for both numerical techniques and the accuracy of the process consisting of putting them all together is studied for some test-signals showing a quite fast Fourier decay.