by Rémy Abergel, Loïc Denis, Florence Tupin, Saïd Ladjal, Charles-Alban Deledalle, Andrés Almansa
Abstract:
Speckle reduction is a necessary step for many applications. Very effective methods have been developed in the recent years for single-image speckle reduction and multi-temporal speckle filtering. However , to reduce the presence of sidelobes around bright targets, SAR images are spectrally weighted and this processing impacts the speckle statistics by introducing spatial correlations. These correlations severely impact speckle reduction methods that require uncor-related speckle as input. Thus, spatial down-sampling is typically applied to reduce the speckle spatial correlations prior to speckle filtering. To better preserve the spatial resolution, we describe how to correctly resample SAR images and extract bright targets in order to process full-resolution images with speckle-reduction methods.
Reference:
Resolution-Preserving Speckle Reduction of SAR Images: the Benefits of Speckle Decorrelation and Targets Extraction (Rémy Abergel, Loïc Denis, Florence Tupin, Saïd Ladjal, Charles-Alban Deledalle, Andrés Almansa), In (IGARSS) International Geoscience and Remote Sensing Symposium, 2019.
Bibtex Entry:
@inproceedings{Abergel2019,
Abstract = {Speckle reduction is a necessary step for many applications. Very effective methods have been developed in the recent years for single-image speckle reduction and multi-temporal speckle filtering. However , to reduce the presence of sidelobes around bright targets, SAR images are spectrally weighted and this processing impacts the speckle statistics by introducing spatial correlations. These correlations severely impact speckle reduction methods that require uncor-related speckle as input. Thus, spatial down-sampling is typically applied to reduce the speckle spatial correlations prior to speckle filtering. To better preserve the spatial resolution, we describe how to correctly resample SAR images and extract bright targets in order to process full-resolution images with speckle-reduction methods.},
Author = {Abergel, R{\'{e}}my and Denis, Lo{\"{i}}c and Tupin, Florence and Ladjal, Sa{\"{i}}d and Deledalle, Charles-Alban and Almansa, Andr{\'{e}}s},
Booktitle = {(IGARSS) International Geoscience and Remote Sensing Symposium},
Keywords = {Sentinel-1,deramping,despeckling,sidelobe reduction,sub-pixel target detection},
Month = {jul},
Title = {{Resolution-Preserving Speckle Reduction of SAR Images: the Benefits of Speckle Decorrelation and Targets Extraction}},
Url = {https://hal.archives-ouvertes.fr/hal-02148907/},
Year = {2019},
Bdsk-Url-1 = {https://hal.archives-ouvertes.fr/hal-02148907/}}