Figure 3:Filtering a set of noisy step edges (constant regions) with a variety of coarsening filters.

Input Image Visualization Gaussian: simga_s = 4 Gaussian: simga_s = 12 BLF: sigma_s = 4, sigma_r = 0.15 BLF: sigma_s = 12, sigma_r = 0.15 BLF: sigma_s = 12, sigma_r = 0.3 BLF: sigma_s = 12, sigma_r = 0.45 WLS: alpha = 1.2, lambda = 0.25 WLS: alpha = 1.8, lambda = 0.35