Evaluation and bias removal of multi-look effect on entropy/alpha/anisotropy

Author

Lee, Jong-Sen ; Ainsworth, Thomas L. ; Kelly, John ; Lopez-Martinez, Carlos

Author_Institution

Naval Res. Lab., Washington

fYear

2007

fDate

23-28 July 2007

Firstpage

172

Lastpage

175

Abstract

Entropy, alpha and anisotropy (H/alpha/A) of the polarimetric target decomposition has been an effective and popular tool for polarimetric SAR image analysis and geophysical parameter estimation. However, multi-look processing can severely affects the values of these parameters. In this paper, we evaluate the bias problem in H/alpha/A due to insufficient averaging. We found that the estimated bias is radar frequency dependent. A procedure for bias compensation is proposed. Data from L-band DLR/E-SAR and L-band JPL/AIRSAR, and X-band PI-SAR data are used for demonstration in this study.

Keywords

error compensation; image processing; radar polarimetry; synthetic aperture radar; L-band DLR-E-SAR data; L-band JPL-AIRSAR data; X-band PI-SAR data; alpha angle; anisotropy; bias compensation; bias removal; entropy; geophysical parameter estimation; polarimetric SAR image analysis; target decomposition; Anisotropic magnetoresistance; Computational modeling; Covariance matrix; Eigenvalues and eigenfunctions; Entropy; Geophysical measurements; L-band; Matrix decomposition; Radar scattering; Remote sensing; Monte Carlo simulation; Multi-looking; Polarimetric SAR; Target decomposition; component;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International

Conference_Location

Barcelona

Print_ISBN

978-1-4244-1211-2

Electronic_ISBN

978-1-4244-1212-9

Type

conf

DOI

10.1109/IGARSS.2007.4422757

Filename

4422757