Segmented map obtained for star-forming region G351.776–0.527 (bottom left) compared with the 2MASS K-band image (top left), where filaments are observed in absorption, and the column density map (top right), where filaments are observed in emission. The filamentary structures visible in the image segmented by UNet++[10–3] (bottom left) and displayed in the [0,1] range are both visible in the 2MASS K and column density images, ensuring their nature. The G351.776–0.527 source is located at the center of the images, connected to a filamentary network (hub). The corresponding input filament mask is shown (bottom right).