Fang SHANG , Akira HIROSEsarcv.ceos.org/site_media/media/documents/S31.2_Shang.pdfSHANG Lab. ,...
Transcript of Fang SHANG , Akira HIROSEsarcv.ceos.org/site_media/media/documents/S31.2_Shang.pdfSHANG Lab. ,...
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
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 3
Introduction
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 4
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
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 5
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
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 6
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
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 7
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
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 8
Stokes Vector Based PolSAR Data Interpretation
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 9
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
Stokes Vector Based PolSAR Data Interpretation
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 10
Orientation / Aperture Routes
Stokes Vector Based PolSAR Data Interpretation
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 11
Zero Orientation / Aperture Route
Zero orientation route
Zero aperture route
=0
=0
Stokes Vector Based PolSAR Data Interpretation
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 12
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…
Stokes Vector Based PolSAR Data Interpretation
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 13
Example of The Result
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 14
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.
Proposed Method with Coordinate Rotation
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 16
Effect of Coordinate Rotation on Zero Orientation / Aperture Route
before after
Proposed Method with Coordinate Rotation
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 17
Effect of Coordinate Rotation on Zero Orientation / Aperture Route
before after
Proposed Method with Coordinate Rotation
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 18
Effect of Coordinate Rotation on Zero Orientation / Aperture Route
F. Shang and A. Hirose, IGARSS2015
Proposed Method with Coordinate Rotation
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 19
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
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 20
Experimental Results
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 21
Man Made Target Detection Result (original)
Experimental Results
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 22
Man Made Target Detection Result (with associative detection)
Experimental Results
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 23
Final Result (Original)
Experimental Results
2016.7.15SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 24
Final Results (with Associative Detection)
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 25
Conclusion
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 26
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
SHANG Lab. , Department of Communication Engineering and Information Systems 2016.9.9 27
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