Fang SHANG , Akira HIROSEsarcv.ceos.org/site_media/media/documents/S31.2_Shang.pdfSHANG Lab. , Department of Communication Engineering and Information Systems 2016.7.152016.9.9 15

Fang SHANG1, Akira HIROSE2

1 Department of Communication Engineering and Information Systems,

University of Electro-Communications

2 Department of Electrical Engineering and Information Systems,

The University of Tokyo

Outline

Introduction1

Stokes Vector Based PolSAR Data Interpretation 2

Proposed Method with Coordinate Rotation 3

Experimental Results 4

Conclusion 5

SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 2

Outline

Introduction1




Conclusion 5


Introduction


Fully Polarimetric SAR

HVSVHS VVS

HHS

Measurements: Scattering Matrix

, ,

, ,

ir H i HHH HV

r V i VVH VV

S Se

S S

kdE E

E Ed

Transmitter: H & V

Receiver: H & V

Introduction


The Conventional Analysis Parameter: C/T Matrix

In application, instead of the scattering matrix S, the second order

operators are widely used for analysis.

HH HV

VH VV

S SS=

S S

1

22

T

HH VV HH VV HV= S +S S -S Sk

0

0

0

2

*TT=

A C -j D H +j G

= C +j D B + B E +j F

H -j G E -j F B - B

k k

2T

HH HV VV= S S S

Ω

2

2

2

2

2 2 2

2

*T

* *

HH HH HV HH VV

* *

HV HH HV HV VV

* *

VV HH VV HV VV

C=

S S S S S

= S S S S S

S S S S S

Ω Ω

In Pauli Basis In Lexicographic Basis

Statistic averaging

for power parameters

Introduction


C/T Metric Based Land Cover Classification

Y.Yamaguchi et al, IEEE TGRS 2011

+ +C/T＝ classifier+ …

Sometimes, using C matrix-

based classification we can

not obtain good enough

result. (man-made targets,

complicate terrains)

Degree of Depolarization

(DoP) Information cannot

be used sufficiently

Introduction


Stokes Vector Based Land Cover Classification

r iHH HVH H

r iVH VVV V

S SE E

S SE E

* *

* *

r r r r

H H H V

r r r r

V H V V

E E E EJ

E E E E

1

2

3

1

1 1

01

0

0

PO UNA

gA

g

g

G G G

POG

UNG

A - Intensity

- Dop

- Completely polarized component

- Completely un-polarized component

Information：information of C/T + DoP

0

1

2

3 ( )

HH VV

HH VV

HV VH

HV VH

J Jg

J Jg

J Jg

j J Jg

G

F. Shang, A. Hirose, TGRS 2014 & 2015

Outline

Introduction1




Conclusion 5


Stokes Vector Based PolSAR Data Interpretation


Orientation / Aperture Routes

Observe on Poincare SpherePOG

2. For serious constant of , observe the routes with various .

1. For serious constant of , observe the routes with various . Orientation Routes

A point on Poincare Sphere

http://fp.optics.arizona.edu/detlab

/Research/Research.htm

Completely Polarized Wave Component (Vector)

Aperture Routes



Orientation / Aperture Routes



Zero Orientation / Aperture Route

Zero orientation route

Zero aperture route

=0

=0



Extract Discriminators & Target Layers

From

POG

A：sensitive to topography, especially very smooth areas

From ：express the incoherence degree of targets in a small window

From ：describe scattering mechanisms, symmetric degree…



Example of The Result

Outline

Introduction1




Conclusion 5


Proposed Method with Coordinate Rotation

2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 15

Coordinate Rotation

Dihedral Model

cos 2 sin 2

sin 2 cos 2diS

ˆˆ, :v h polarization basis of incident wave.

ˆˆ , :d dv h coordinate system of the dihedral.

Coordinate system of SAR.

Local Coordinate System of Target.

Same type of target may corresponding

different Stokes vector.



Effect of Coordinate Rotation on Zero Orientation / Aperture Route

before after




before after




F. Shang and A. Hirose, IGARSS2015



Proposed method

In a small local

window, if the z

coordinate of

“terminal” is almost

the same, we treat

the all target in the

small window as the

same type of target

Associative Detection

Outline

Introduction1




Conclusion 5


Experimental Results


Man Made Target Detection Result (original)



Man Made Target Detection Result (with associative detection)



Final Result (Original)



Final Results (with Associative Detection)

Outline

Introduction1




Conclusion 5


Conclusion


Consider the coordinate rotation effect to implement associative detection.

Find the same type of targets with different Stokes Vector

Have a better final result

Conclusion


Relative Papers Published by Our Group

F. Shang, A. Hirose, Averaged Stokes Vector Based PolarimetricSAR data Interpretation. IEEE Transactions on Geoscience and Remote Sensing 53/ 8, 4536-4547 2015

F. Shang, A. Hirose, Quaternion Neural-Network-Based PolSARLand Classification in Poincare-Sphere-Parameter Space. IEEE Transactions on Geoscience and Remote Sensing 52/ 9, 5693-5703 2014

Documents

Fang SHANG , Akira HIROSEsarcv.ceos.org/site_media/media/documents/S31.2_Shang.pdfSHANG Lab. , Department of Communication Engineering and Information Systems 2016.7.152016.9.9 15