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SAR Image Despeckling with Adaptive Multiscale Products Based on Directionlet Transform
Joint Authors
Lu, Yixiang
Gao, Qingwei
Sun, Dong
Zhang, Dexiang
Source
Mathematical Problems in Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-02
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Synthetic aperture radar (SAR) images are inherently affected by multiplicative speckle noise generated by radar coherent wave.
In this paper, a new despeckling algorithm based on directionlets using multiscale products is proposed.
We first take an anisotropic directionlet transform on the logarithmically transformed SAR images and multiply the coefficients at adjacent scales to enhance the details of image under consideration.
Then, different from traditional thresholding methods, a threshold is applied to the multiscale products of the directionlet coefficients to suppress noise.
Since the multiplication amplifies the significant features of signal and dilute noise, the proposed method reduces noise effectively while preserving edge structures.
Finally, we compare the performance of the proposed algorithm with other despeckling methods applied to synthetic image and real SAR images.
Experimental results demonstrate the effectiveness of the proposed method in SAR images despeckling.
American Psychological Association (APA)
Lu, Yixiang& Gao, Qingwei& Sun, Dong& Zhang, Dexiang. 2013. SAR Image Despeckling with Adaptive Multiscale Products Based on Directionlet Transform. Mathematical Problems in Engineering،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-1008663
Modern Language Association (MLA)
Lu, Yixiang…[et al.]. SAR Image Despeckling with Adaptive Multiscale Products Based on Directionlet Transform. Mathematical Problems in Engineering No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-1008663
American Medical Association (AMA)
Lu, Yixiang& Gao, Qingwei& Sun, Dong& Zhang, Dexiang. SAR Image Despeckling with Adaptive Multiscale Products Based on Directionlet Transform. Mathematical Problems in Engineering. 2013. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-1008663
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1008663