Acta mathematica scientia,Series A ›› 2022, Vol. 42 ›› Issue (2): 605-620.

Previous Articles     Next Articles

A Modified HS-DY-Type Method with Nonmonotone Line Search for Image Restoration and Unconstrained Optimization Problems

Gonglin Yuan1(),Yulun Wu1,*(),Hongtruong Pham2()   

  1. 1 Center for Applied Mathematics of Guangxi & College of Mathematics and Information Science, Guangxi University, Nanning 530004
    2 Thai Nguyen University of Economics and Business Administration, Thai Nguyen, Vietnam
  • Received:2021-03-03 Online:2022-04-26 Published:2022-04-18
  • Contact: Yulun Wu E-mail:glyuan@gxu.edu.cn;wuyulun@st.gxu.edu.cn;shanghaichina888@yahoo.com
  • Supported by:
    the NSFC(11661009);the High Level Innovation Teams and Excellent Scholars Program in Guangxi Institutions of Higher Education([2019]52);the Guangxi Natural Science Key Fund(2017GXNSFDA198046);the Special Funds for Local Science and Technology Development Guided by the Central Government(ZY20198003);the Special Foundation for Guangxi Ba Gui Scholars

Abstract:

A modified conjugate gradient algorithm for solving image restoration problems and unconstrained optimization problems is proposed, where the conjugate gradient (CG) parameter is the convex combination of the improved HS and DY methods, and the CG parameter contains function information. In addition, the method does not require any line searches, and it can generate sufficient descent directions. Moreover, under certain conditions, the new method is globally convergent with nonmonotone line search. Finally, experiments on unconstrained optimization and image restoration problems show that the new method has good application prospects and advantages when compared with other conjugate gradient algorithms.

Key words: Conjugate gradient, Global convergence, Unconstrained optimization, Nonmonotone line search, Image restoration

CLC Number: 

  • O221
Trendmd