Comparison of dual and full polarimetric entropy/alpha decompositions with TerraSAR-X, suitability for use in classification

Dhar, Ankita; Gray, B. Doug; Menges, CH

doi:10.1109/igarss.2011.6049163

Cited by 8 publications

(7 citation statements)

References 3 publications

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“…Close similarities can be seen between the plots based on the quad-and HH/VV dual-polarization data. On the other hand, it is clear from figure 4 that, with HH/HV dual-polarization, alpha angle cannot be obtained as with HH/VV dual-polarization data as indicated in Ainsworth et al (2007) and Dhar et al (2011). However, HH/HV dual entropy still seems reliable.…”

Section: Polarimetric Sar Datamentioning

confidence: 60%

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On the similarity between dual- and quad-eigenvalue analysis in SAR polarimetry

Sugimoto

Ouchi

Nakamura

2013

Remote Sensing Letters

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This study clarifies the difference in eigenvalue analysis between quad-, HH/VV dual-and HH/HV dual-polarization synthetic aperture radar (SAR) data (HH, HV and VV represent horizontal transmission horizontal reception, horizontal transmission vertical reception and vertical transmission vertical reception of microwaves, respectively). There are different types of data acquisition modes in SAR systems and each one of them has different advantages and disadvantages. The main advantage of quad-polarization data is more detailed information about scattering objects, and those of dual-or single-polarization data are higher spatial resolution, wider area coverage and

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Section: Polarimetric Sar Datamentioning

confidence: 60%

“…The entropy/alpha decomposition algorithm for HH/HV dual-polarization data can be found in (Cloude 2007, Dhar et al 2011, and Downloaded by [University Of Maryland] at 23:03 13 October 2014 the entropy/alpha decomposition algorithm for HH/VV dual-polarization data can be expressed as follows:…”

Section: Methodsmentioning

confidence: 99%

On the similarity between dual- and quad-eigenvalue analysis in SAR polarimetry

Sugimoto

Ouchi

Nakamura

2013

Remote Sensing Letters

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“…Consequently, the H/ᾱ decomposition approach can be directly performed on this coherency matrix [1,22]. Note that, in this study, we use the synthetically generated DLP data obtained by unitary transformation from circular to linear basis:…”

Section: Target Decomposition For Dlp Data (H/ᾱ Decomposition)mentioning

confidence: 99%

“…DLP systems, on the other hand, overcome these limiting factors but they do not afford complete information regarding the full polarization state of the targets. For example, it results in a less accurate alpha angle parameter [1,2] and does not give the possibility to perform three-component Due to the growing interest in the use of circular polarization, we investigate, in this paper, the feasibility of the FCP and DCP modes of CP-SAR and its performance on rice phenology monitoring. For this purpose, a ground-based CP-radar system was adopted, and the time-series C-band backscattering data of a Japanese rice paddy (Oryza sativa L.) were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dual- and Full-Circular Polarimetric SAR Modes for Rice Phenology Monitoring: An Experimental Investigation through Ground-Based Measurements

et al. 2017

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Circularly polarized synthetic aperture radar (CP-SAR) is known to be insensitive to polarization mismatch losses caused by the Faraday rotation effect and antenna misalignment. Additionally, the dual-circular polarimetric (DCP) mode has proven to have more polarimetric information than that of the corresponding mode of linear polarization, i.e., the dual-linear polarimetric (DLP) mode. Owing to these benefits, this paper investigates the feasibility of CP-SAR for rice monitoring. A ground-based CP-radar system was exploited, and C-band anechoic chamber data of a self-cultivated Japanese rice paddy were acquired from germination to ripening stages. Temporal variations of polarimetric observables derived from full-circular polarimetric (FCP) and DCP as well as synthetically generated DLP data are analyzed and assessed with regard to their effectiveness in phenology retrieval. Among different observations, the H/ᾱ plane and triangle plots obtained by three scattering components (surface, double-bounce, and volume scattering) for both the FCP and DCP modes are confirmed to have reasonable capability in discriminating the relevant intervals of rice growth.

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“…Cloude (2007) developed a dual polarized version of the entropy/alpha decomposition for HH/HV and VV/VH data, and Dhar, Gray, and Menges (2011) applied the dual-polarization entropy/ alpha decomposition in classification of healthy and unhealthy vegetation. Ainsworth et al (2007) also introduced the method to dual-polarization data, and designed a feasible division of entropy/alpha space for HH/HV data.…”

Section: Introductionmentioning

confidence: 99%

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

Xie

Hong

Wang

et al. 2015

Remote Sensing Letters

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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 quadpolarization 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.

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Comparison of dual and full polarimetric entropy/alpha decompositions with TerraSAR-X, suitability for use in classification

Cited by 8 publications

References 3 publications

On the similarity between dual- and quad-eigenvalue analysis in SAR polarimetry

On the similarity between dual- and quad-eigenvalue analysis in SAR polarimetry

Analysis of Dual- and Full-Circular Polarimetric SAR Modes for Rice Phenology Monitoring: An Experimental Investigation through Ground-Based Measurements

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

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