期刊
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
卷 19, 期 -, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2021.3051936
关键词
Synthetic aperture radar; Time series analysis; Speckle; Noise reduction; Correlation; Transient analysis; Standards; Alternating direction method of multiplier (ADMM); change detection; denoising; geometric mean; multitemporal synthetic aperture radar (SAR) series; speckle reduction; temporal mean; variational methods
类别
资金
- Centre National d'Etudes Spatiales
- C-S GROUP
The letter discusses the use of geometric mean in averaging SAR time series, compares its properties with arithmetic mean, and presents a speckle-reduction method specifically designed for improving images obtained with geometric mean.
The increasing availability of synthetic aperture radar (SAR) time series creates many opportunities for remote sensing applications, but it can be challenging in terms of amount of data to process. This letter discusses the interest of the geometric mean to average SAR time series. First, the properties of the geometric mean and the arithmetic mean are compared. Then, a speckle-reduction method specifically designed to improve images obtained with the geometric mean is presented. This method is based on an adaptation of the MuLoG framework to take into account the specific distribution of the geometric mean. Finally, applications of this denoised geometric-mean image are presented.
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