| 易开宇,戴贞明.基于混合非凸性二阶全变分和重叠组稀疏的
非盲图像去模糊算法[J].电子测量与仪器学报,2021,35(9):229-235 |
| 基于混合非凸性二阶全变分和重叠组稀疏的
非盲图像去模糊算法 |
| Non-blind image deblurring based on hybrid non-convex second-ordertotal variation and the overlapping group sparse |
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| DOI： |
| 中文关键词: 图像去模糊 阶梯效应 非凸性二阶全变分 重叠组稀疏 交替方向法 |
| 英文关键词:image deblurring staircase artifact non-convex second-order total variation overlapping group sparse alternating direction
method |
| 基金项目:江西省科技厅自然科学基金(20161BAB202049)、江西省教育厅自然科学技术研究重点项目(GJJ171375)、江西省高等学校教学改革研究项目(JXJG15 60 4)、宜春市社科研究“十二五”规划重点项目(YCSKJ 2015 042)资助 |
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| 摘要点击次数: 681 |
| 全文下载次数: 1298 |
| 中文摘要: |
| 为了解决凸性全变分正则化模型会使重构结果出现非闭合轮廓和非齐整边缘等缺点,设计了混合非凸性全变分耦合重
叠组稀疏的图像去模糊算法。 重叠组稀疏正则化项很好地考虑了相邻元素之间相互交叉的关系,非凸性二阶 l
p范数正则化项
较好保持了图像的边缘形状信息,同时将这两个正则约束项融入到全变分函数中,可以准确地恢复边缘结构特征以及消除平滑
区的阶梯效应和振铃效应。 最后,为实现非凸性高阶模型的优化求解,提出了变量分裂法,将该模型分离成 4 个子问题,然后借
助重加权 l
1 交替方向法来完成图像去模糊的计算。 测试数据显示,相比当前图像复原技术,所提算法具备更为理想的去模糊效
果,复原图像表现出更高的峰值信噪比和结构相似度,可以更有效地恢复出边缘形状信息和纹理细节。 |
| 英文摘要: |
| In order to solve the problem as non-closed contour and non-uniform edge of reconstruction results in convex total variational
regularization model, a mode of image deblurring based on hybrid non-convex second-order total variation and overlapping group sparse is
proposed. Overlapping group sparse regularization item well considering the cross relationship between adjacent elements, non convexity
second-order l
p norm regularization item better keep the edge of the image shape information, and the two regular constraint into total
variation method at the same time, which can accurately restore edge structure characteristics and eliminate the staircase effect and
smooth ringing effect. Finally, in order to achieve the optimal solution of the non-convex higher-order model, the variable splitting
method is proposed to separate the model into four sub-problems, and then the method of a re-weighted l
1
alternating direction method is
used to complete the calculation of image deblurring. The test data show that compared with the current image restoration technology, the
proposed algorithm has better deblurring effect, the restored image shows higher peak signal-to-noise ratio and structural similarity,
which can recover edge shape information and texture details more effectively. |
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