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Theoretical Analysis of a Symmetric Two-Stage Change Detector for SAR Images

Publication ,  Journal Article
Bondre, AS; Richmond, CD
Published in: IEEE Transactions on Geoscience and Remote Sensing
January 1, 2022

A procedure is developed to generate theoretical receiver operating characteristic (ROC) curves for the two-stage change detector proposed by Cha et al., in order to compare its detection performance with other detectors. A modification, however, to the first stage of the two-stage detector is proposed, which introduces a symmetry that significantly simplifies analysis. The probability density function (pdf) for this symmetric two-stage detector is derived, and using this pdf, an approach for determining thresholds is proposed. The symmetric two-stage detector introduces a new parameter that effectively weights each statistic making up its two individual stages. Detection performance is explored versus this new parameter. The two-stage detector is shown to yield overall better detection performance than the sample variance ratio, Berger's alternative coherence estimator, and the classical coherence estimator. When applied to real synthetic aperture radar (SAR) data, the two-stage detector and Berger's estimator yield binary change images with more easily visible areas of change. Finally, we derive an expression for the pdf of the optimal log-likelihood ratio statistic that is simpler than that given by Preiss et al.

Duke Scholars

Published In

IEEE Transactions on Geoscience and Remote Sensing

DOI

EISSN

1558-0644

ISSN

0196-2892

Publication Date

January 1, 2022

Volume

60

Related Subject Headings

  • Geological & Geomatics Engineering
  • 40 Engineering
  • 37 Earth sciences
  • 0909 Geomatic Engineering
  • 0906 Electrical and Electronic Engineering
  • 0404 Geophysics
 

Citation

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Chicago
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MLA
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Bondre, A. S., & Richmond, C. D. (2022). Theoretical Analysis of a Symmetric Two-Stage Change Detector for SAR Images. IEEE Transactions on Geoscience and Remote Sensing, 60. https://doi.org/10.1109/TGRS.2021.3087530
Bondre, A. S., and C. D. Richmond. “Theoretical Analysis of a Symmetric Two-Stage Change Detector for SAR Images.” IEEE Transactions on Geoscience and Remote Sensing 60 (January 1, 2022). https://doi.org/10.1109/TGRS.2021.3087530.
Bondre AS, Richmond CD. Theoretical Analysis of a Symmetric Two-Stage Change Detector for SAR Images. IEEE Transactions on Geoscience and Remote Sensing. 2022 Jan 1;60.
Bondre, A. S., and C. D. Richmond. “Theoretical Analysis of a Symmetric Two-Stage Change Detector for SAR Images.” IEEE Transactions on Geoscience and Remote Sensing, vol. 60, Jan. 2022. Scopus, doi:10.1109/TGRS.2021.3087530.
Bondre AS, Richmond CD. Theoretical Analysis of a Symmetric Two-Stage Change Detector for SAR Images. IEEE Transactions on Geoscience and Remote Sensing. 2022 Jan 1;60.

Published In

IEEE Transactions on Geoscience and Remote Sensing

DOI

EISSN

1558-0644

ISSN

0196-2892

Publication Date

January 1, 2022

Volume

60

Related Subject Headings

  • Geological & Geomatics Engineering
  • 40 Engineering
  • 37 Earth sciences
  • 0909 Geomatic Engineering
  • 0906 Electrical and Electronic Engineering
  • 0404 Geophysics