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Jin Guowang, 2003, The Interferogram Filtering of
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»
Jong-Sen Lee, K.P.Papathanassiou et al., A new technique
Figure9f fake coherence image for noise filtering of SAR interferometric phase images,
IEEE Trans. Geosci. Remote Sensing, 36,1456-1465,1998.
Figure9e The fringe
in Figure7f
à Jj ;
| P ' a P TACKNOWLEDGEMENT
dis E t! KEY \
‘ E ; ‘ This work is supported by National Science and High
| oat *, 4 j * i Technology 863 Plan, coded 2001AA132011.
T j: dog, ABST!
: Ck Te ; 8. APPENDIX
ss In this
vr, / .
: ; consid:
‘ : laser s
Figure9g unwrapped result Figure9h unwrapped regio numbe
estimal
The selected gate value of fake coherence is 0.85, and the
black points and region are not dealt with phase unwrapping for
their fake coherence values are lower then the gate value. All the The at
interferograms adopted are successfully unwrapped by avoiding man-m
the low fake coherence region. photog
. is class
5. CONCLUSION points
Inteferogram filtering is a key technology of INSAR. It can quen
make phase unwrapping easy and simple. Now, the vector charac
filtering is a better filtering method because it has the laser
advantages of fast, high precision and good results. The new indepe
phase unwrapping scheme used in this paper includes two steps: the ran
firstly, the vector filtering is used to reduce the phase noises in Overy:
the. interferogram. Secondly, the region grow method based on Pereira
coherence or fake coherence was used to unwrap the phase of
interferograms. This scheme can make the phase unwrapping Curren
successful. So, the difficult problem is resolved. :
We should pay more attention to the study of interferogram ae bas
filtering to reduce the difficulty of phase unwrapping in the [nee
study of phase unwrapping later. by the
pulses.
6. REFERENCE typical
detecti
References from Journals: Sume
SHI Shi-ping 2000,DEM Generation Using Such s
ERS-1/2Interferometric SAR Data[J]. Journal of Surveying laser 1
and Mapping, 29(4),317-322.(in Chinese) I x p
ast pu
Reference from Books: uan
Xiao Guochao, Zhu Caiying. 2001, RADAR ae
PHOTOGRAMMETRY[M], Earthquake Press, China,. para
Shen Bang-le. 1995, Computer Image Processing.Beljing: (air
PLA Press.. Surface
image
Reference from Other Literature: visible,
Franz Leberl, 1978, RADARGRAMMETRY FOR and fo
IMAGEINTERPRETA TION [R], ITC Technical Report, hen ;
nounda
Yang Qing-vou, Wang Chao.1999, The Co-registration of
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