Water-ice image for Case 1 produced with various KGC parameters with and without speckle filtering. The kernel graph cuts (KGC) parameter k for (a) is k = 3, (b)k = 4, (c)k = 6, and (d)k = 4. For (a)–(c), no speckle filter was applied to TerraSAR-X SAR imagery prior to the water-ice segmentation (see Figures 8a and 9a); for (d), speckle filters (median, bilateral and Gaussian) were applied to the SAR imagery (see Figures 8d and 9d). 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.f10