Water-ice image for Case 1 produced with various speckle filters. The segmentation results were derived from the TerraSAR-X SAR image (pixel spacing = 2.5 m) (a) without any speckle filter, (b) with a median (3 × 3) filter, (c) with median and bilateral (half-width = 15) filters, and (d) with median, bilateral and Gaussian (7 × 7) filters. We set kernel graph cuts (KGC) parameters k = 2 and β = 0.00 (no smoothing) for the segmentation to demonstrate the effects of speckle filtering. In each panel there are two small red boxes that have been blown up and re-displayed in the lower left and right corners. No manual inspection/correction was applied for the results shown here. DOI: https://doi.org/10.1525/elementa.154.f9