Sparse Hierarchical Preconditioners Using Piecewise Smooth Approximations of Eigenvectors.

Bazyli Klockiewicz Eric Darve

Published in: SIAM J. Sci. Comput. (2020)

Keyphrases

piecewise smooth
sparse representation
gaussian noise
mumford shah functional
image restoration
piecewise constant
mumford shah
principal component analysis
high dimensional
image patches
signal processing
diffusion equation
nearest neighbor
mean shift
steady state