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Unsupervised Change Detection of SAR Images Based on an Improved NSST Algorithm

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Abstract

In order to improve the accuracy of synthetic aperture radar (SAR) image change detection and have good change detection results, this paper proposes a method based on non-subsampled shearlet transform (NSST) detection in SAR images, for unsupervised changes. First, two original, registered images go through smoothing filtering, and then the normalized difference ratio method is used to obtain the difference image. After that, NSST is used to decompose the distance map into low frequency and high frequency sub-bands. The low frequency sub-bands are processed using linear enhancement, and the high frequency sub-bands are processed using the adaptive threshold method. Then, inverse NSST is used to obtain the enhanced difference figure. Finally, the fuzzy local information C clustering (FLICM) algorithm is used for clustering the pixels of the image into changed and unchanged sections. The experimental results show that the algorithm can effectively improve the accuracy of remote sensing image change detection, and it is not affected by the statistical distribution of the changed and unchanged sections. The proposed algorithm has higher detection accuracy than the FLICM, DWT2-FLICM, and NSCT-FLICM algorithms.

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Acknowledgements

This work was supported in part by International Cooperative Research and Personnel Training Projects of the Ministry of Education of the People’s Republic of China [Grant number DICE2014-2029] and [2016-2191].

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Authors and Affiliations

  1. College of Information Science and Engineering, Xinjiang University, Urumuqi, 830046, China

    Pengyun Chen & Zhenhong Jia

  2. Institute of Image Processing and Pattern Recognition Shanghai, Jiao Tong University, Shanghai, 200400, China

    Jie Yang

  3. Knowledge Engineering and Discovery Research Institute, Auckland University of Technology, Auckland, 1020, New Zealand

    Nikola Kasabov

Authors
  1. Pengyun Chen
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  2. Zhenhong Jia
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  3. Jie Yang
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  4. Nikola Kasabov
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Correspondence to Zhenhong Jia.

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Chen, P., Jia, Z., Yang, J. et al. Unsupervised Change Detection of SAR Images Based on an Improved NSST Algorithm. J Indian Soc Remote Sens 46, 801–808 (2018). https://doi.org/10.1007/s12524-017-0740-4

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  • DOI: https://doi.org/10.1007/s12524-017-0740-4

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