کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4969340 | 1449934 | 2017 | 9 صفحه PDF | دانلود رایگان |
- A simple primal-dual method is presented for saddle point problem in image deblurring.
- Each iteration consists of dual prediction, primal update and dual correction.
- Convergence requirement on pairwise primal-dual stepsize is relaxed.
- Simple proof is developed for O(1/N) convergence rate in ergodic sense.
In this paper, a simple primal-dual method named PDL is proposed for a convex concave saddle problem and applied to total variational image deblurring. Introduction of linear mapping on proximal term relaxes convergence requirement on pairwise primal-dual stepsize. Simple proof is presented for O(1/N) convergence rate in ergodic sense. Experiments show that performance of PDL is comparable with proximal PDHG (Zhu et al., 2010; Bonettini and Ruggiero, 2012) and PDCP (Chambolle and Pock, 2011) on Gaussian or Salt-Pepper noisy image deblurring.
Journal: Journal of Visual Communication and Image Representation - Volume 42, January 2017, Pages 112-120