Improving IFSAR phase unwrapping by early detection of noninterferometric features

Florence Tupin; Emmanuele Trouve; Xavier Descombes; Jean-Marie Nicolas; Henri Maitre

doi:10.1117/12.262696

17 December 1996 Improving IFSAR phase unwrapping by early detection of noninterferometric features

Florence Tupin, Emmanuele Trouve, Xavier Descombes, Jean-Marie Nicolas, Henri Maitre

Proceedings Volume 2958, Microwave Sensing and Synthetic Aperture Radar; (1996) https://doi.org/10.1117/12.262696
Event: Satellite Remote Sensing III, 1996, Taormina, Italy

Abstract

This paper presents an original method base don the simultaneous analysis of phase, amplitude and coherence images for the detection of landscape features which do not provide topographic phase signal; for these surfaces, either phases or phase differences are not valid, respectively because of temporal changes and non-backscattering surfaces, or because of foreshortening and lay-over effects on mountain fore-slopes. A contextual classification based on Markov Random Fields is used to detect such perturbations through different classes corresponding to different feature shapes and characteristics. Classes describing thick structures are identified on the coherence and amplitude images available along with interferograms and on a measure of confidence derived from spectral analysis of the phase signal. The classical Potts model is well adapted to the regularization of such compact shape structures. Thin structures are enhanced by directional contrast operators dedicated to speckle SAR images. Associated directions allow a specific regularization scheme which preserves thin structures. The classification results are eventually used as a mask to enable automatic phase unwrapping performed either by path-following methods or by weighted least squares methods. Feature detection and unwrapping results are presented for various landscapes on interferometric data obtained from ERS-1 satellite over Ukraine and Switzerland regions.

Citation Download Citation

Florence Tupin, Emmanuele Trouve, Xavier Descombes, Jean-Marie Nicolas, and Henri Maitre "Improving IFSAR phase unwrapping by early detection of noninterferometric features", Proc. SPIE 2958, Microwave Sensing and Synthetic Aperture Radar, (17 December 1996); https://doi.org/10.1117/12.262696

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available