Coherence estimation for SAR imagery

@article{Touzi1999CoherenceEF,
  title={Coherence estimation for SAR imagery},
  author={Ridha Touzi and Armand Lopes and J{\'e}r{\^o}me Bruniquel and Paris W. Vachon},
  journal={IEEE Trans. Geosci. Remote. Sens.},
  year={1999},
  volume={37},
  pages={135-149}
}
In dual- or multiple-channel synthetic aperture radar (SAR) imaging modes, cross-channel correlation is a potential source of information. The sample coherence magnitude is calculated over a moving window to generate a coherence magnitude map. High-resolution coherence maps may be useful to discriminate fine structures. Coarser resolution is needed for a more accurate estimation of the coherence magnitude. In this study, the accuracy of coherence estimation is investigated as a function of the… 

Figures and Tables from this paper

Interferometric SAR coherence magnitude estimation using second kind statistics

It is shown that the coherence magnitude estimation from complex coherence maps (interferometric data) using second kind statistics is the optimal estimation procedure of interferometric coherence.

Coherence estimation in synthetic aperture radar data based on speckle noise modeling.

Two coherence estimation approaches, aiming to reduce the different biases, are proposed based on the coherence model, and results with simulated and experimental polarimetric and interferometric SAR data illustrate and validate both.

A Weighted Coherence Estimator for SAR Coherent Change Detection

Synthetic aperture radar (SAR) coherent change detection (CCD) predominantly uses the degree of coherence or similar change metrics as a measurement of the changes that have occurred between two data

Improving coherence estimation for high-resolution polarimetric SAR interferometry

This work presents a new method for filtering the coherence map issued from Synthetic Aperture Radar (SAR) polarimetric interferometric data, where each pixel of the interferogram is determined by a region growing technique driven by the amplitude image information.

Hybrid Approach for Unbiased Coherence Estimation for Multitemporal InSAR

This paper focuses on multitemporal InSAR coherence estimation and presents a hybrid approach that mitigates effectively the errors in the estimation and is almost completely self-adaptive and workable for both Gaussian and non-Gaussian SAR scenes.

Speckle filtering and coherence estimation of polarimetric SAR interferometry data for forest applications

A new algorithm to improve the accuracy in the coherence estimation based on speckle filtering of the 6/spl times/6 polarimetric interferometry matrix is proposed and German Aerospace Center (DLR) L-Band E-SAR data are applied to demonstrate the improved accuracy in coherence and in forest height estimation.

Quicklook coherence estimation from multilook SAR imagery

This work presents applications of an unsupervised method capable of providing estimates of temporal coherence starting from a pair of multilook detected Synthetic Aperture Radar (SAR) images of the

Estimation of stationary and nonstationary coherence in SAR imagery

  • R. Touzi
  • Physics
    IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174)
  • 1998
Coherence estimation for nonstationary targets is discussed. It is shown that the averaged sample coherence obtained from complex coherence maps or coherence magnitude maps is suitable for estimation

Algorithm of Interferometric Coherence Estimation for Synthetic Aperture Radar Image Pair

A method for suppression of the topographic phase influence is proposed, based on the spatial phase derivation, which aims to reduce the dependence on phase slope caused by relief topography in coherence estimation.

DRASTIC IMPROVEMENT OF CHANGE DETECTION RESULTS WITH MULTILOOK COMPLEX SAR IMAGES APPROACH

Coherent Change Detection (CCD) is a powerful technique that uses Synthetic Aperture Radar (SAR) coherence to measure subtle ground changes in the imaged area. Unfortunately, the coherence estimator
...

References

SHOWING 1-10 OF 40 REFERENCES

Maximum likelihood estimation for SAR interferometry

  • M. SeymourI. Cumming
  • Environmental Science
    Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium
  • 1994
Synthetic aperture radar (SAR) interferometry (InSAR) uses phase differences between overlapping SAR images to estimate terrain height and terrain height changes. In addition, the coherence magnitude

SAR interferometry: a "Quick and dirty" coherence estimator for data browsing

A fast algorithm for generating coherence maps, based on the speckle similarity of coherent SAR data, and is thus independent of fringe frequency, is presented, mainly intended for data browsing.

Optimal speckle reduction in polarimetric SAR imagery

A novel, constant-false-alarm-rate (CFAR) detector (the adaptive PWF) is presented; the algorithm is shown to have detection performance comparable with that of the OPD.

Repeat-pass SAR interferometry over forested terrain

A general system model is derived including both radar system and scene scattering properties used to interpret measurements over a forested area where the scene coherence varies between 0.2 and 0.5 and is found to be sensitive to temperature changes but surprisingly insensitive to wind speed.

Limits to the resolution of elevation maps from stereo SAR images

Abstract In Synthetic Aperture Radar (SAR) interferometry from a satellite, the altimetric information is obtained from the phase difference of two focused complex images gathered by the same sensor

THE COEFFICIENT OF COHERENCE: ITS ESTIMATION AND USE IN GEOPHYSICAL DATA PROCESSING

The coefficient of coherence between two stationary time series was introduced by Wiener in 1930. It is related to the signal‐to‐noise ratio, to the minimum prediction error, and has important

Statistics of the Stokes parameters and of the complex coherence parameters in one-look and multilook speckle fields

  • R. TouziA. Lopes
  • Mathematics, Environmental Science
    IEEE Trans. Geosci. Remote. Sens.
  • 1996
The statistics of the Stokes parameters and of the phase difference are derived as a function of the mean effective phase difference and the degree of coherence for one-look and multilook SAR data.

Change detection techniques for ERS-1 SAR data

  • E. RignotJ. V. Zyl
  • Environmental Science, Mathematics
    IEEE Trans. Geosci. Remote. Sens.
  • 1993
Several techniques for detecting temporal changes in satellite synthetic-aperture radar (SAR) imagery are compared, using both theoretical predictions and spaceborne SAR data collected by the first

On the Interferometric Coherence: A Multifrequency and Multitemporal Analysis.

The potential of satellite repeat-passSAR interferometry for mapping and monitoring of different natural surfaces is discussed here. The presented approaches are based on analysis of the

Intensity and phase statistics of multilook polarimetric and interferometric SAR imagery

The results of this paper can be applied to feature classification using polarimetric SAR and to the estimation of decorrelation effects of the interferometric SAR.