联合4方向特征的全局优化图像补全

李志丹; 和红杰; 陈帆; 尹忠科

doi:10.3788/OPE.20152304.1171

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联合4方向特征的全局优化图像补全

信息科学 | 更新时间：2020-08-13

- 联合4方向特征的全局优化图像补全
- Image completion with global optimization based on four-direction features
- 光学精密工程 2015年23卷第4期页码：1171-1178
- 作者机构：
  
  1. 北京遥感信息研究所北京,100192
  2. 西南交通大学信号与信息处理四川省重点实验室,四川成都,610031
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No. 61461047, 61373180)();2014年西南交通大学博士研究生创新基金和中央高校基本科研业务费专项基金资助项目();四川
- DOI：10.3788/OPE.20152304.1171
  中图分类号： TP391.41
- 收稿日期：2014-12-04，
  
  修回日期：2015-01-22，
  
  纸质出版日期：2015-04-25
- 稿件说明：
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李志丹, 和红杰, 陈帆等. 联合4方向特征的全局优化图像补全[J]. 光学精密工程, 2015,23(4): 1171-1178

LI Zhi-dan, HE Hong-jie, CHEN Fan etc. Image completion with global optimization based on four-direction features[J]. Editorial Office of Optics and Precision Engineering, 2015,23(4): 1171-1178
李志丹, 和红杰, 陈帆等. 联合4方向特征的全局优化图像补全[J]. 光学精密工程, 2015,23(4): 1171-1178 DOI： 10.3788/OPE.20152304.1171.

LI Zhi-dan, HE Hong-jie, CHEN Fan etc. Image completion with global optimization based on four-direction features[J]. Editorial Office of Optics and Precision Engineering, 2015,23(4): 1171-1178 DOI： 10.3788/OPE.20152304.1171.

摘要

为更好地保持修复后图像的结构连贯性及与邻域信息的连续一致性

提出了联合4方向特征的全局优化图像补全算法。该方法利用Curvelet变换提取图像的水平

垂直

正对角及反对角4个方向的特征。在构造数据项和平滑项能量时

利用4方向特征与颜色信息共同衡量样本块间的相似性

以此构造符合人眼视觉要求的全局能量约束方程;同时自适应确定计算数据项和平滑项能量的样本块尺寸。最后利用图割算法求取全局能量的极小值

获得修复图像。实验显示:与现有算法相比

提出算法可以获得更优的修复结果

其峰值信噪比(PSNR)平均值比现有算法至少高出2 dB

验证了提出算法的有效性;结果也表明:提出的算法可以更好地保持图像结构的连贯性及修复区域内的连续一致性

能满足人眼视觉需求。

Abstract

To better maintain the structure coherence and neighborhood consistence of inpainted images

this paper proposes an image completion algorithm by using global optimization based on four-direction features. In the algorithm

the Curvelet transform was adopted to extract the features in horizontal

vertical

positive diagonal and antidiagonal directions. when the data term and smooth term energy were constructed

the four-direction features were combined with color information to measure the similarity between patches and to construct a global energy constraint equation to satisfy human eye visual requirement. Meanwhile

the sizes of patches used to compute data term and smooth term energy were adaptively determined. Finally

the graph cut algorithm was applied to calculation of the minimum value of global energy to obtain the inpainted image. The experimental results show that the proposed algorithm achieves better inpainted results. Moreover

the Peak Signal to Noise Ratio(PSNR) values of the proposed method are much larger than that of the existing methods

and the PSNR on average is higher 2 dB than that of the existing methods. The objective and subjective evaluations both show the validity of the proposed method. It concludes that the proposed algorithm has better maintained the structure coherence and neighborhood consistence

which makes the repaired images meet the human eye visual requirements.

关键词

Keywords

references

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