36 citations · 47 across the 12 of their papers we have counts for
Showing 2021Show all
2 papers · 1 filter
math.OC2021
The Proximity Operator of the Log-Sum Penalty
Ashley Prater-Bennette, Lixin Shen, Erin E. Tripp
The log-sum penalty is often adopted as a replacement for the pseudo-norm in compressive sensing and low-rank optimization. The hard-thresholding operator, i.e., the proxi…
math.OC2021
Regularization with Multilevel Non-stationary Tight Framelets for Image Restoration
Yan-ran Li, Raymond H. F. Chan, Lixin Shen +1
Variational regularization models are one of the popular and efficient approaches for image restoration. The regularization functional in the model carries prior knowledge about th…