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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 2 | Copyright

Special issue: Flood ris​k analysis and integ​rated management

Nat. Hazards Earth Syst. Sci., 15, 273-276, 2015
https://doi.org/10.5194/nhess-15-273-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Brief communication 05 Feb 2015

Brief communication | 05 Feb 2015

Brief Communication: Contrast-stretching- and histogram-smoothness-based synthetic aperture radar image enhancement for flood map generation

F. Nazir1, M. M. Riaz2, A. Ghafoor1, and F. Arif1 F. Nazir et al.
  • 1Military College of Signals, National University of Sciences and Technology (NUST), Islamabad, Pakistan
  • 2Centre for Advanced Studies in Telecommunication (CAST), COMSATS, Islamabad, Pakistan

Abstract. Synthetic-aperture-radar-image-based flood map generation is usually a challenging task (due to degraded contrast). A three-step approach (based on adaptive histogram clipping, histogram remapping and smoothing) is proposed for generation of a more visualized flood map image. The pre- and post-flood images are adaptively histogram equalized. The hidden details in difference image are enhanced using contrast-based enhancement and histogram smoothing. A fast-ready flood map is then generated using equalized pre-, post- and difference images. Results (evaluated using different data sets) show significance of the proposed technique.

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