Similarity analysis of entropy/alpha decomposition between HH/VV dual- and quad-polarization SAR data

The potential information of dual-polarization SAR data has received various attentions, and previous investigations indicated that HH/VV dual-polarization data could provide entropy/alpha decomposition results that were very close to those obtained using quad-polarization data. However, some numerical relationships between the results of dual- and quad-polarization data are overlooked. In this study, the generalized similarity parameter is firstly introduced to link the entropy/alpha decomposition in dual- and quad-polarization modes. Then, their numerical relationships are analysed using both spaceborne (ALOS-PALSAR, Radarsat-2 and TerraSAR-X) and airborne (ESAR, EMISAR, PISAR, Convair and AirSAR) data at different frequencies. The experimental results suggest that the value of alpha in HH/VV dual-polarization mode is generally less than that in quad-polarization mode, and entropy in HH/VV weakens the distinctions between certain land cover types in some cases compared to quad-polarization entropy. In addition, the entropy/alpha is found to be not rotation-invariant around the line of sight in HH/VV dual-polarization mode.

[1]  洪文,et al.  On the Sim ilarity Param eter Between Two Targets for the Case of M ulti-Look Polarimetric SAR , 2009 .

[2]  E. Pottier,et al.  Polarimetric Radar Imaging: From Basics to Applications , 2009 .

[3]  Jian Yang,et al.  Fast Alternatives to $H/\alpha$ for Polarimetric SAR , 2010, IEEE Geoscience and Remote Sensing Letters.

[4]  John Kelly,et al.  Evaluation and Bias Removal of Multilook Effect on Entropy/Alpha/Anisotropy in Polarimetric SAR Decomposition , 2008, IEEE Transactions on Geoscience and Remote Sensing.

[5]  Fernando Vicente-Guijalba,et al.  Polarimetric Response of Rice Fields at C-Band: Analysis and Phenology Retrieval , 2014, IEEE Transactions on Geoscience and Remote Sensing.

[6]  Eric Pottier,et al.  An entropy based classification scheme for land applications of polarimetric SAR , 1997, IEEE Trans. Geosci. Remote. Sens..

[7]  S. D. M. ller,et al.  Polarisation: Applications in Remote Sensing , 2010 .

[8]  Tishampati Dhar,et al.  Comparison of dual and full polarimetric entropy/alpha decompositions with TerraSAR-X, suitability for use in classification , 2011, 2011 IEEE International Geoscience and Remote Sensing Symposium.

[9]  Shane R. Cloude,et al.  The Dual Polarization Entropy/Alpha Decomposition: A PALSAR Case Study , 2007 .

[10]  N.J.S. Stacy,et al.  Analysis of Compact Polarimetric SAR Imaging Modes , 2007 .

[11]  Jaan Praks,et al.  Alternatives to Target Entropy and Alpha Angle in SAR Polarimetry , 2009, IEEE Transactions on Geoscience and Remote Sensing.

[12]  Irena Hajnsek,et al.  First Results of Rice Monitoring Practices in Spain by Means of Time Series of TerraSAR-X Dual-Pol Images , 2011, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[13]  Mitsunobu Sugimoto,et al.  On the similarity between dual- and quad-eigenvalue analysis in SAR polarimetry , 2013 .

[14]  Eric Pottier,et al.  Quantitative comparison of classification capability: fully polarimetric versus dual and single-polarization SAR , 2001, IEEE Trans. Geosci. Remote. Sens..

[15]  Juan M. Lopez-Sanchez,et al.  Rice Phenology Monitoring by Means of SAR Polarimetry at X-Band , 2012, IEEE Transactions on Geoscience and Remote Sensing.