کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1713011 | 1013212 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cauchy pdf modelling and its application to SAR image despeckling
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Cauchy pdf modelling and its application to SAR image despeckling Cauchy pdf modelling and its application to SAR image despeckling](/preview/png/1713011.png)
چکیده انگلیسی
Synthetic aperture radar (SAR) imagery is a kind of coherent system that produces a random pattern, named speckle, which degrades the merit of SAR images and affects their further application seriously. Therefore, how to restore SAR image from the speckle has become a necessary step in post-processing of image. A newdespeckling method is putforth on the basis of wavelet. First, a new approach on the basis of “second kind statistics”is used to estimate the dispersion parameter of the Cauchy distribution. Then, this Cauchy prior is applied to modelthe distribution of the wavelet coefficients for the log-transformed reflectance of SAR image. Based on the aboveideas, a new homomorphic wavelet-based maximum a posterior (MAP) despeckling method is proposed. Finally, the simulated speckled image and the real SAR image are used to verify our proposed method and the results showthat it outperforms the other methods in terms of the speckle reduction and the feature retention.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Systems Engineering and Electronics - Volume 19, Issue 4, August 2008, Pages 717-721
Journal: Journal of Systems Engineering and Electronics - Volume 19, Issue 4, August 2008, Pages 717-721
نویسندگان
Chen Guozhong, Liu Xingzhao,