Modified Hybrid Steepest Method for the Split Feasibility Problem in Image Recovery of Inverse Problems

ABSTRACT In this paper, we regard the CQ algorithm as a fixed point algorithm for averaged mapping, and also try to study the split feasibility problem by the following hybrid steepest method; where {αn}⊂(0,1). It is noted that Xu’s original iterative method can conclude only weak convergence. Consequently, we obtain the sequence {xn} generated by our iteration method converges strongly to , where is the unique solution of the variational inequality Our result extends and improves the result of Xu, as shown in the literature, from weak to strong convergence theorems. Finally, in the last section, numerical examples for study behavior convergence analysis of this algorithm are obtained.

[1]  Hong-Kun Xu VISCOSITY APPROXIMATION METHODS FOR NONEXPANSIVE MAPPINGS , 2004 .

[2]  D. Youla,et al.  Image Restoration by the Method of Convex Projections: Part 1ߞTheory , 1982, IEEE Transactions on Medical Imaging.

[3]  Yair Censor,et al.  A multiprojection algorithm using Bregman projections in a product space , 1994, Numerical Algorithms.

[4]  I. Yamada,et al.  Minimizing certain convex functions over the intersection of the fixed point sets of nonexpansive mappings , 1998 .

[5]  Rudong Chen,et al.  A Relaxed CQ Algorithm for Solving Split Feasibility Problem , 2011, 2011 International Conference on Control, Automation and Systems Engineering (CASE).

[6]  I. Yamada,et al.  Quadratic optimization of fixed points of nonexpansive mappings in Hilbert space , 1998 .

[7]  Hong-Kun Xu,et al.  Averaged Mappings and the Gradient-Projection Algorithm , 2011, J. Optim. Theory Appl..

[8]  C. Byrne,et al.  Iterative oblique projection onto convex sets and the split feasibility problem , 2002 .

[9]  W. A. Kirk,et al.  Topics in Metric Fixed Point Theory , 1990 .

[10]  P. Kumam,et al.  A Modified Halpern's Iterative Scheme for Solving Split Feasibility Problems , 2012 .

[11]  Giuseppe Marino,et al.  A general iterative method for nonexpansive mappings in Hilbert spaces , 2006 .

[12]  Hong-Kun Xu Iterative Algorithms for Nonlinear Operators , 2002 .

[13]  Wataru Takahashi,et al.  A strong convergence theorem for relatively nonexpansive mappings in a Banach space , 2005, J. Approx. Theory.

[14]  A. Moudafi Viscosity Approximation Methods for Fixed-Points Problems , 2000 .

[15]  I. Yamada The Hybrid Steepest Descent Method for the Variational Inequality Problem over the Intersection of Fixed Point Sets of Nonexpansive Mappings , 2001 .

[16]  Hong-Kun Xu An Iterative Approach to Quadratic Optimization , 2003 .

[17]  Hong-Kun Xu Iterative methods for the split feasibility problem in infinite-dimensional Hilbert spaces , 2010 .

[18]  F. Browder,et al.  FIXED-POINT THEOREMS FOR NONCOMPACT MAPPINGS IN HILBERT SPACE. , 1965, Proceedings of the National Academy of Sciences of the United States of America.

[19]  Wataru Takahashi,et al.  Strong convergence theorems obtained by a generalized projections hybrid method for families of mappings in Banach spaces , 2010 .