Filaments extracted by getsf on selected spatial scales in three star-forming regions: Taurus (top), Aquila (middle), and IC 5146 (bottom). The flattened components ℱ_ƛD derived from the hires surface densities 𝒟_13″ obtained from Eq. (8) using the Herschel 160, 250, 350, and 500 μm images are shown. The minimum scales of 36″ (left column) correspond to 2.8 times the angular resolution, whereas the maximum scales (right column) correspond to 0.3 pc at the adopted distances of the regions (140, 260, and 460 pc, respectively). Intermediate scales between the two extremes are displayed in the middle column. The images were cleaned using the default threshold ϖ_ƛFj = 2σ_ƛFj. Overlaid on the filaments are their skeletons obtained from the images using the Hilditch algorithm (Sect. 3.4.5). The observed filaments are heavily substructured, and their appearance, detected skeletons, and measured properties depend strongly on spatial scales. Logarithmic color mapping.