• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2016, Vol. 38 ›› Issue (02): 338-343.

• 论文 • 上一篇    下一篇

高阶PDE模型中的松弛中值图像去噪方法

芦碧波1,王建龙1,张跃2,王国东2   

  1. (1.河南理工大学计算机科学与技术学院,河南 焦作 454000;2.河南理工大学电气工程与自动化学院,河南 焦作 454000)
  • 收稿日期:2015-01-12 修回日期:2015-04-24 出版日期:2016-02-25 发布日期:2016-02-25
  • 基金资助:

    国家自然科学基金(11301113,U1404103);河南省教育厅科技攻关重点项目(14A520029);河南理工大学博士基金 (B200941);河南理工大学青年骨干教师资助计划(0913)

A relaxed median image denoising method
in high order PDE model    

LU Bibo1,WANG Jianlong1,ZHANG Yue2,WANG Guodong2   

  1. (1.School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo 454000;
    2.School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China)
  • Received:2015-01-12 Revised:2015-04-24 Online:2016-02-25 Published:2016-02-25

摘要:

针对平均曲率极小化模型在去噪过程中产生斑点的问题,提出了一种平均曲率和松弛中值滤波结合的迭代算法。首先,使用平均曲率模型对噪声图像处理,根据局部方差信息,利用阈值确定斑点的位置。其次,利用具一定边界保持性质的松弛中值滤波器消除斑点噪声。最后,为更有效地消除斑点,在每一次随着时间的迭代后都使用松弛中值滤波。对曲线和图像进行去噪仿真实验,结果表明,相对于平均曲率模型,本文算法在客观指标和主观视觉效果上均有更好的去噪效果和更低的时间复杂度。

关键词: 图像去噪, 偏微分方程, 平均曲率, 松弛中值滤波器, 斑点效应

Abstract:

To remove speckle effect produced by the mean curvature model, we propose an iterative image denosing algorithm, which combines the mean curvature model and the relaxed median filter. Firstly, we denoise the image by the mean curvature model. Then the speckle noise is located using a threshold according to the variance of the image. Finally the relaxed median filter is introduced. To remove the speckle noise more efficiently, the filter is applied at every iteration step. Denoising simulations on curves and images show that the proposed algorithm has better denoising effect in terms of objective indicators and subjective visual effect, as well as lower time complexity in comparison with the mean curvature model.Key words

Key words: image denoising;partial differential equation;mean curvature;relaxed median filter;speckle effect