arXiv subjects

Ibrahim KARAHAN

Publications and source records attributed to Ibrahim KARAHAN.

2 recordsLinked to original sources

arXiv2021

Image restoration using an inertial viscosity fixed point algorithm

The image restoration problem is one of the popular topics in image processing studied by many authors on account of its applications in various areas. The aim of this paper is to present a new algorithm by using viscosity approximation with inertial effect for finding a common fixed point of an infinite family of nonexpansive mappings in a Hilbert space and obtaining more quality images from degenerate images. Some strong convergence theorems are proved under mild conditions. The obtained results are applied to solve monotone inclusion problems, convex minimization problems, variational inequality problems and generalized equilibrium problems. It is shown that the proposed algorithm performs better than some other algorithms. Also, the effects of inertial and viscosity terms in the algorithm on image restoration have been investigated.

math.FA↗

arXiv2021

A new preconditioning algorithm for finding a zero of the sum of two monotone operators and its application to image restoration problem

Finding a zero of the sum of two monotone operators is one of the most important problems in monotone operator theory, and the forward-backward algorithm is the most prominent approach for solving this type of problem. The aim of this paper is to present a new preconditioning forward-backward algorithm to obtain the zero of the sum of two operators in which one is maximal monoton and the other one is M-cocoercive, where M is a linear bounded operator. Furthermore, the strong convergence of the proposed algorithm, which is a broader variant of previously known algorithms, has been proven in Hilbert spaces. We also use our algorithm to tackle the convex minimization problem and show that it outperforms existing algorithms. Finally, we discuss several image restoration applications.

math.FA↗