Section of the Polaris Flare region with filamentary structures as seen by Herschel at 160 (top left), 250 (top right), 350 (bottom left) and 500 (bottom right) μm (from HGBS, André et al. 2010). Fifty random 2D Gaussian sources have been injected at each wavelength and positioned on top of the filaments, as discussed in Sect. 4.3. The 250 μm map also shows the 50 sources positions and 2D Gaussian fit as obtained with Hyper.