fully polarimetric sar data utilization - jaxa...2 000 01#+j 0+#j1 ps pv pd pc 10log - 4 db- 2 db0...

Fully polarimetric SAR data utilization

Yoshio Yamaguchi

Ps Pv

Pd

4 scattering mechanisms

Ps Pd,Pv,Pc

2011年11月17日木曜日

Provide imagesEasy to understand

for everybody

ALOS-2 What is important ?

Specific applications

Environmental changeDisaster monitoring

land slideearthquake

Agricultural applicationscrop productionCivil engineering

mapping

Continuation ofALOS-PALSAR

Polarimetric data

ResearchEducation


At a glance! Example of 4-comp. decomposition

Google Earth Optical Image

ALOS-PALSAR Quad Pol Image

Ps Pv

Pd

Ps: surface scatteringPd: double bouncePv: volume scattering


POLSAR image analyses

<Average>

Pauli Basis

Eigenvalue

Scattering Power DecompositionCovariance matrix Coherency matrix

Entropy, Alpha-angle, Anisotropy

Scattering matrix= Quad-Pol. data

Pd, Pv, Ps, Pc

VVHVHHColor-Composite

HH-VV, 2HV, HH+VV

λ1 λ2 λ3

HV Basis

HH, 2HV, VV

Ps Pv

Pd

volume scattering

double bounce

surface scattering


General 4-component scattering power decomposition with Unitary transformation

all polarimetric parameters are accounted for the newly developed decomposition (G4U)

unitary transformation

Surface scattering

Double bounce

Volume scattering

Helix scattering

Scattering Power

expansion matrix

!2

! 0! * 1 00 0 0

1 "* 0

" "2 0

0 0 0

130

15 5 05 7 00 0 8

14

2 0 00 1 00 0 1

130

15 - 5 0- 5 7 00 0 8

12

0 0 00 1 #+ j0 +# j 1

PsPv

Pd Pc

- 4 dB - 2 dB 0 dB 2 dB 4 dB10 logSVV

2

SHH2

T vol =

14

2 0 00 1 00 0 1

130

15 5 05 7 00 0 8

130

15 - 5 0- 5 7 00 0 8

115

0 0 00 7 00 0 8

HV from oriented dihedral

Surface scattering

Double bounce

Volume scattering

Helix scattering

Scattering Power

expansion matrix

!2

! 0! * 1 00 0 0

1 "* 0

" "2 0

0 0 0

130

15 5 05 7 00 0 8

14

2 0 00 1 00 0 1

130

15 - 5 0- 5 7 00 0 8

12

0 0 00 1 #+ j0 +# j 1

PsPv

Pd Pc

- 4 dB - 2 dB 0 dB 2 dB 4 dB10 logSVV

2

SHH2

T vol =

14

2 0 00 1 00 0 1

130

15 5 05 7 00 0 8

130

15 - 5 0- 5 7 00 0 8

115

0 0 00 7 00 0 8

HV from oriented dihedral

with extended volume scattering model dihedral

dipole

T volhv = 1

42 0 00 1 00 0 1

etc

G. Singh, Y. Yamaguchi, et al, “Polarimetric SAR target decomposition with unitary transformation,” 2nd Intʼl POLSAR Workshop in Niigata 2011


COLOR Code for Decomposed Image

Surface(Ps) Volume(Pv) Helix(Pc)Double bounce(Pd)

++ +

++ =


G4U-3C (Pd,Pv,Ps)

G4U-4C (Pd,Pv,Ps,Pc)

Ps Pd Pv Pc

Ps Pd Pv


G4U-4C (Pd,Pv,Ps,Pc) G4U-3C (Pd,Pv,Ps)

Ps Pd Pv Pc Ps Pd Pv


Ps Pd Pv Pc


ALPSRP069210790-1.1A

39.747N140.976E

Mt. IwateMoriokaJapan

N

Ps Pv

Pd

©JAXA, METI

2007/5/13

Scattering power Decomposition

2007/3/28ALPSRP062500790-1.1A

Decomposed image by (Ps, Pd, Pv, 2x12 pixels, Re(T23)=0 rotation)


2007/5/6 2007/11/6

Rotation2x12 pixel

ALOS PALSARQuad-Pol.

Scattering power

Decom-position

ChuetsuNiigataJapan

Ps Pv

Pd


2008/2/6 2008/11/8 2009/3/26

T33 Rotation

2x12 pixel


Ps Pv

Pd

Scattering power

Decom-position

ChuetsuNiigataJapan


2010/3/192009/3/262007/3/21

T33 Rotation

2x12 pixel


Ps Pv

Pd

Scattering power

Decom-position

ChuetsuNiigataJapan


2011.1.23

Yunotani, Niigata


Left: Before, Right: Afterthe earthquake and tsunami


Conclusion for ALOS-2

It is very important to keep PLR as a routine mode

Continuation of ALOS-PALSAR Polarimetric data

Provide images, easy to understand for everybody

The polarimetric data provides all necessary informationthat cannot be achieved elsewhere

Full utilization method for PLR data is now established


fully polarimetric sar data utilization - jaxa...2 000 01#+j 0+#j1 ps pv pd pc 10log - 4 db- 2 db0...

Documents