测绘通报 ›› 2018, Vol. 0 ›› Issue (11): 25-29.doi: 10.13474/j.cnki.11-2246.2018.0344

• 学术研究 • 上一篇    下一篇

Non-local Means算法在InSAR干涉图中的去噪研究

胡晋山, 丁进, 康建荣, 黄晨玲   

  1. 江苏师范大学地理测绘与城乡规划学院, 江苏 徐州 221000
  • 收稿日期:2018-05-24 修回日期:2018-07-16 出版日期:2018-11-25 发布日期:2018-11-29
  • 作者简介:胡晋山(1973-),男,博士,副教授,主要研究方向为地理信息系统、矿区生态环境治理等。E-mail:xzjshu@163.com
  • 基金资助:

    国家自然科学基金(41671395;51574132);江苏研究生科研创新计划项目(KYCX17_1573)

Study of InSAR Interferogram Denoising by Non-local Means Algorithm

HU Jinshan, DING Jin, KANG Jianrong, HUANG Chenling   

  1. School of Geography, Geomatics and Planning, Jiangsu Normal University, Xuzhou 221000, China
  • Received:2018-05-24 Revised:2018-07-16 Online:2018-11-25 Published:2018-11-29

摘要:

针对非局部化图像修复算法(Non-local Means)在干涉图滤波方面的不足,提出了一种基于相干系数改进的自适应平滑参数的Non-local Means算法,理论上,改进的算法在对InSAR干涉图进行去噪的同时,能够保留更多的干涉图像纹理和细节信息。最后通过实测数据,比较分析了新算法与传统Non-local Meas滤波算法、goldstein、自适应中值滤波的去噪效果,结果表明本文提出的改进算法在抑制InSAR干涉图噪声、保持相位信息和条纹信息方面要优于其他3种滤波算法。

关键词: 滤波算法, 自适应, InSAR干涉图, 噪声

Abstract:

In view of the deficiency of the non-local image restoration algorithm (Non-local Means) in interferogram filtering, an adaptive smoothing parameter Non-local Means based on the coherence coefficient is proposed. In theory, the improved algorithm can retain more physical and detailed information of interference images while denoising the InSAR interferogram. Finally, the denoising effect of the new algorithm, the traditional Non-local Means filtering algorithm, the Goldstein and the adaptive median filter are compared and analyzed by the measured data. The results show that the improved algorithm proposed in this paper is superior to the other three filtering algorithms in restraining the noise of InSAR interferogram, maintaining phase information and stripe information.

Key words: filtering algorithm, adaptive, InSAR interferogram, noise

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