Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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: 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 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.

Citation: Nazir, F., Riaz, M. M., Ghafoor, A., and Arif, F.: Brief Communication: Contrast-stretching- and histogram-smoothness-based synthetic aperture radar image enhancement for flood map generation, Nat. Hazards Earth Syst. Sci., 15, 273-276, https://doi.org/10.5194/nhess-15-273-2015, 2015.
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