Several recent papers use image denoising with a Fields of Experts prior to benchmark discrete optimization methods. We show that a non-linear least squares solver significantly outperforms all known discrete methods on this problem.
Cite
@article{arxiv.1403.5590,
title = {Continuous Optimization for Fields of Experts Denoising Works},
author = {Petter Strandmark and Sameer Agarwal},
journal= {arXiv preprint arXiv:1403.5590},
year = {2014}
}