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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 31 — Nov. 1, 2012
  • pp: 7701–7713

Background first- and second-order modeling for point target detection

Laure Genin, Frédéric Champagnat, and Guy Le Besnerais  »View Author Affiliations


Applied Optics, Vol. 51, Issue 31, pp. 7701-7713 (2012)
http://dx.doi.org/10.1364/AO.51.007701


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Abstract

This paper deals with point target detection in nonstationary backgrounds such as cloud scenes in aerial or satellite imaging. We propose an original spatial detection method based on first- and second-order modeling (i.e., mean and covariance) of local background statistics. We first show that state-of-the-art nonlocal denoising methods can be adapted with minimal effort to yield edge-preserving background mean estimates. These mean estimates lead to very efficient background suppression (BS) detection. However, we propose that BS be followed by a matched filter based on an estimate of the local spatial covariance matrix. The identification of these matrices derives from a robust classification of pixels in classes with homogeneous second-order statistics based on a Gaussian mixture model. The efficiency of the proposed approaches is demonstrated by evaluation on two cloudy sky background databases.

© 2012 Optical Society of America

OCIS Codes
(040.1880) Detectors : Detection
(100.0100) Image processing : Image processing
(110.3080) Imaging systems : Infrared imaging

ToC Category:
Image Processing

History
Original Manuscript: May 22, 2012
Revised Manuscript: October 10, 2012
Manuscript Accepted: October 12, 2012
Published: October 31, 2012

Citation
Laure Genin, Frédéric Champagnat, and Guy Le Besnerais, "Background first- and second-order modeling for point target detection," Appl. Opt. 51, 7701-7713 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-31-7701


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