期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
A New Extrapolation Economy Cascadic Multigrid Method for Image Restoration Problems
1
作者 Zhaoteng Chu Ziqi Yan Chenliang Li 《American Journal of Computational Mathematics》 2023年第2期323-341,共19页
In this paper, a new extrapolation economy cascadic multigrid method is proposed to solve the image restoration model. The new method combines the new extrapolation formula and quadratic interpolation to design a nonl... In this paper, a new extrapolation economy cascadic multigrid method is proposed to solve the image restoration model. The new method combines the new extrapolation formula and quadratic interpolation to design a nonlinear prolongation operator, which provides more accurate initial values for the fine grid level. An edge preserving denoising operator is constructed to remove noise and preserve image edges. The local smoothing operator reduces the influence of staircase effect. The experiment results show that the new method not only improves the computational efficiency but also ensures good recovery quality. 展开更多
关键词 extrapolation Economy cascadic multigrid method New extrapolation Formula Edge Preserving Denoising Operator Local Smoothing Operator
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部