UNSUPERVISED CLASSIFICATION OF POLARIMETRIC SAR IMAGES USING SCATTERING MECHANISM AND MARKOV RANDOM FIELDS

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DARGAHI A.; MAGHSOUDI Y.; ABKAR A.A.

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Journal: JOURNAL OF RADAR Year:2013 | Volume:1 | Issue:1 (SERIAL NO. 1) Page(s): 15-26

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Title

UNSUPERVISED CLASSIFICATION OF POLARIMETRIC SAR IMAGES USING SCATTERING MECHANISM AND MARKOV RANDOM FIELDS

Author(s)

DARGAHI A. | MAGHSOUDI Y. | ABKAR A.A. | Issue Writer Certificate

Keywords

SYNTHETIC APERTURE RADAR (SAR)Q2

POLARIMETRYQ2

TARGET DECOMPOSITION (TD)Q2

MARKOV RANDOM FIELD (MRF)Q2

CLASSIFICATIONQ2

Abstract

In this paper, an unsupervised CLASSIFICATION method using spatial contextual information is proposed for polarimetric SAR (PolSAR) image categorization. First, an unsupervised CLASSIFICATION based on H/Alpha plane was performed, using Cloude/Pottier target decomposition algorithm. Then, the output of the H/alpha CLASSIFICATION have been considered In order to compute the initial values of the cluster centers and hence a rapid convergence of the algorithm. After that, using discriminant function derived from Bayes Theory, the CLASSIFICATION was carried out based on MAP criteria. In the MAP criteria, the Wishart distribution was used as the distribution of the PolSAR data. We also employed Markov random field algorithm for modeling the spatial information to calculate prior probability of classes. In order to enhance the classes' separability, two image data from two different seasons were utilized simultaneously. The overall accuracy of CLASSIFICATION was achieved respectively 70% and 82% for the two methods of Wishart and MAP criteria (WMRF). In this study, the RADARSAT-2 satellite images were gotten from a forested area known as Petawawa, Canada.

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References

تصحیح هندسی ویژگی های پلاریمتری تصاویر RADARSAT-2 با استفاده از مدل RPC بهبودیافته

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APA: Copy

DARGAHI, A., MAGHSOUDI, Y., & ABKAR, A.A.. (2013). UNSUPERVISED CLASSIFICATION OF POLARIMETRIC SAR IMAGES USING SCATTERING MECHANISM AND MARKOV RANDOM FIELDS. JOURNAL OF RADAR, 1(1 (SERIAL NO. 1)), 15-26. SID. https://sid.ir/paper/244150/en

Vancouver: Copy

DARGAHI A., MAGHSOUDI Y., ABKAR A.A.. UNSUPERVISED CLASSIFICATION OF POLARIMETRIC SAR IMAGES USING SCATTERING MECHANISM AND MARKOV RANDOM FIELDS. JOURNAL OF RADAR[Internet]. 2013;1(1 (SERIAL NO. 1)):15-26. Available from: https://sid.ir/paper/244150/en

IEEE: Copy

A. DARGAHI, Y. MAGHSOUDI, and A.A. ABKAR, “UNSUPERVISED CLASSIFICATION OF POLARIMETRIC SAR IMAGES USING SCATTERING MECHANISM AND MARKOV RANDOM FIELDS,” JOURNAL OF RADAR, vol. 1, no. 1 (SERIAL NO. 1), pp. 15–26, 2013, [Online]. Available: https://sid.ir/paper/244150/en

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