On the edge detection of an image by numerical differentiations for gray function
On the edge detection of an image by numerical differentiations for gray function
复制标题
灰度函数数值微分图像边缘检测
DOI:
10.1002/mma.4752
复制
发表时间:
2018-04
期刊:
影响因子:
--
通讯作者:
Jijun Liu
中科院分区:
文献类型:
--
作者:
Yuchan Wang;Jijun Liu
The detection of image edges is of great importance in image processing. One of the efficient implementations for this image recovery problem is based on the identification of sharp jumps of the gray function of the image. Mathematically, this problem can be modeled by the numerical differentiation of the gray function with 2 variables. For this ill‐posed problem with nonsmooth solution, we investigate the regularization schemes with total variation and L1 penalty term, respectively. We prove that the regularizing parameter under the Tikhonov regularization framework can be uniquely chosen in terms of the Morozov's discrepancy principle and then establish the convergence rate of the regularizing solutions in terms of the Bregman distance. The discrete schemes are performed by the lagged diffusivity fixed point iteration, with numerical implementations showing the validity of the proposed scheme.
登录
查看更多内容
影响因子:
10.2
作者:
HANSEN, PC
通讯作者:
HANSEN, PC
影响因子:
2
作者:
A. Chambolle
通讯作者:
A. Chambolle
影响因子:
2.4
作者:
Wang Zewen;Wen Rongsheng
通讯作者:
Wen Rongsheng
影响因子:
1.7
作者:
Huilin Xu;Jijun Liu
通讯作者:
Huilin Xu;Jijun Liu
影响因子:
2.1
作者:
REINSCH, CH
通讯作者:
REINSCH, CH