Title :
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
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;
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
DOI :
10.1109/IGARSS.2007.4422757
