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Publications sur synthetic aperture radar
Résultat de la recherche dans la liste des publications :
2 Articles |
1 - Enhanced Dictionary-Based SAR Amplitude Distribution Estimation and Its Validation With Very High-Resolution Data.
V. Krylov et G. Moser et S.B. Serpico et J. Zerubia. IEEE-Geoscience and Remote Sensing Letters, 8(1): pages 148-152, janvier 2011.
Mots-clés : finite mixture models, parametric estimation, probability-density-function estimation, EM Stochastique (SEM), synthetic aperture radar.
Copyright : IEEE
@ARTICLE{krylovGRSL2011,
|
| author |
= |
{Krylov, V. and Moser, G. and Serpico, S.B. and Zerubia, J.}, |
| title |
= |
{Enhanced Dictionary-Based SAR Amplitude Distribution Estimation and Its Validation With Very High-Resolution Data}, |
| year |
= |
{2011}, |
| month |
= |
{janvier}, |
| journal |
= |
{IEEE-Geoscience and Remote Sensing Letters}, |
| volume |
= |
{8}, |
| number |
= |
{1}, |
| pages |
= |
{148-152}, |
| url |
= |
{http://dx.doi.org/10.1109/LGRS.2010.2053517}, |
| pdf |
= |
{http://hal.archives-ouvertes.fr/inria-00503893/en/}, |
| keyword |
= |
{finite mixture models, parametric estimation, probability-density-function estimation, EM Stochastique (SEM), synthetic aperture radar} |
| } |
Abstract :
In this letter, we address the problem of estimating the amplitude probability density function (pdf) of single-channel synthetic aperture radar (SAR) images. A novel flexible method is developed to solve this problem, extending the recently proposed dictionary-based stochastic expectation maximization approach (developed for a medium-resolution SAR) to very high resolution (VHR) satellite imagery, and enhanced by introduction of a novel procedure for estimating the number of mixture components, that permits to reduce appreciably its computational complexity. The specific interest is the estimation of heterogeneous statistics, and the developed method is validated in the case of the VHR SAR imagery, acquired by the last-generation satellite SAR systems, TerraSAR-X and COSMO-SkyMed. This VHR imagery allows the appreciation of various ground materials resulting in highly mixed distributions, thus posing a difficult estimation problem that has not been addressed so far. We also conduct an experimental study of the extended dictionary of state-of-the-art SAR-specific pdf models and consider the dictionary refinements. |
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2 - Comparative study on the performance of multi paramater SAR data for operational urban areas extraction.
C. Corbane et N. Baghdadi et X. Descombes et M. Petit. IEEE-Geoscience and Remote Sensing Letters, 6(4): pages 728-732, octobre 2009.
Mots-clés : Markov random field model, synthetic aperture radar, urban remote sensing.
@ARTICLE{COR-09,
|
| author |
= |
{Corbane, C. and Baghdadi, N. and Descombes, X. and Petit, M.}, |
| title |
= |
{Comparative study on the performance of multi paramater SAR data for operational urban areas extraction}, |
| year |
= |
{2009}, |
| month |
= |
{octobre}, |
| journal |
= |
{IEEE-Geoscience and Remote Sensing Letters}, |
| volume |
= |
{6}, |
| number |
= |
{4}, |
| pages |
= |
{728-732}, |
| url |
= |
{http://dx.doi.org/10.1109/LGRS.2009.2024225}, |
| keyword |
= |
{Markov random field model, synthetic aperture radar, urban remote sensing} |
| } |
Abstract :
The advent of a new generation of synthetic aperture radar (SAR) satellites, such as Advanced SAR/Environmental Satellite (C-band), Phased Array Type L-band Synthetic Aperture Radar/Advanced Land Observing Satellite (L-band), and TerraSAR-X (X-band), offers advanced potentials for the detection of urban tissue. In this letter, we analyze and compare the performance of multiple types of SAR images in terms of band frequency, polarization, incidence angle, and spatial resolution for the purpose of operational urban areas delineation. As a reference for comparison, we use a proven method for extracting textural features based on a Gaussian Markov Random Field (GMRF) model. The results of urban areas delineation are quantitatively analyzed allowing performing intrasensor and intersensors comparisons. Sensitivity of the GMRF model with respect to texture window size and to spatial resolutions of SAR images is also investigated. Intrasensor comparison shows that polarization and incidence angle play a significant role in the potential of the GMRF model for the extraction of urban areas from SAR images. Intersensors comparison evidences the better performances of X-band images, acquired at 1-m spatial resolution, when resampled to resolutions of 5 and 10 m. |
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