Despeckling of SAR Imagery Using Contourlet Transform in A Homomorphic Framework

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Despeckling Synthetic Aperture Radar Imagery using the Contourlet Transform

A novel method of Synthetic Aperture Radar (SAR) image despeckling using the contourlet transform representation is presented. Justification for the use of the contourlet signal representation, originally developed for natural images, is given. Methods of evaluating the despeckling performance of various algorithms are provided. Finally, a comparison of performance of multilook processing, wave...

متن کامل

Comparing Undecimated Wavelet, Nonsubsampled Contourlet and Shearlet Transform for SAR Image Despeckling

Synthetic Aperture Radar (SAR) images suffer of multiplicative speckle noise, which damages the radiometric resolution of SAR images and makes the data interpretation difficult. Bayesian shrinkage in a transformed domain is a well-known method based on finding threshold value to suppress the speckle noise. This paper present a new approach to obtain the optimum threshold values for Bayesian shr...

متن کامل

An Adaptive Sar Image Despeckling Algorithm Using Stationary Wavelet Transform

In this paper, we present a Stationary Wavelet Transform (SWT) based method for the purpose of despeckling the Synthetic Aperture radar (SAR) images by applying a maximum a posteriori probability (MAP) condition to estimate the noise free wavelet coefficients. The solution of the MAP estimator is based on the assumption that the wavelet coefficients have a known distribution. Rayleigh distribut...

متن کامل

Sar Image Despeckling Using Bandelet Transform with Firefly Algorithm

Removal of noise from image is often the first step in image processing and remains a challenging problem inspite of the sophistication of recent research. Among all noise, speckle noise existing in Satellite images, Medical images and Synthetic Aperture Radar (SAR) images is definitely to be removed since the details of the image are corrupted. The analysis of despeckling SAR image based on Ba...

متن کامل

Bayesian-Based Speckle Suppression for SAR Image Using Contourlet Transform

⎯A novel and efficient speckle noise reduction algorithm based on Bayesian contourlet shrinkage using contourlet transform is proposed. First, we show the sub-band decompositions of SAR images using contourlet transforms, which provides sparse representation at both spatial and directional resolutions. Then, a Bayesian contourlet shrinkage factor is applied to the decomposed data to estimate th...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: AL-Rafidain Journal of Computer Sciences and Mathematics

سال: 2010

ISSN: 2311-7990

DOI: 10.33899/csmj.2010.163854