NDLI: Two dimensional phase unwrapping based on the Laplace and Eikonal equations

Content Provider	IEEE Xplore Digital Library
Author	Fornaro, G. Franceschetti, G. Lanari, R.
Copyright Year	1995
Description	Author affiliation: Dipartimento di Ingegneria Elettronica, Naples Univ., Italy (Fornaro, G.; Franceschetti, G.; Lanari, R.)
Abstract	In interferometric synthetic aperture radar (IFSAR) applications the goal is represented by the evaluation of the digital elevation model (DEM) of the illuminated area. This result is achieved by exploiting the phase interference of two spatially separated side-views of the same site. In order to correctly generate the interferogram, some operations must be carried out on the received data. Firstly they must be correctly focused, secondly the obtained complex images must be properly registered. These operations result in a phase interferogram which represents the phase values restricted to the range [-/spl pi/,/spl pi/) (wrapped values). Phase unwrapping procedures allow the unwrapped phase values to be obtained which are directly linked to the desired DEM. To solve this problem several techniques have been proposed. The present authors give a new phase unwrapping algorithm which utilised Green's identity and Green's functions. The proposed technique is intrinsically two-dimensional, is robust and quite insensible to the propagation of the errors generated by non exact phase measurements.
Starting Page	1828
Ending Page	1830
File Size	310364
Page Count	3
File Format	PDF
ISBN	0780325672
DOI	10.1109/IGARSS.1995.524039
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-07-10
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Laplace equations Synthetic aperture radar interferometry Robustness Digital elevation models Interference Focusing Phase measurement Computational modeling Testing Convolution
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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