Extracted filaments on the Herschel column density maps. Top row: Column density images (FWHM = 20″) of fields G17, G202, and G208 showing the extracted filaments in each field. Filament quality is marked by color of symbols: q = 1 (yellow circles), q = 2 (purple circles), q = 3 (orange crosses), and q = 4 (green crosses). The yellow contour shows the limit of A_V = 3 mag. Bottom row: Extracted filament profiles, in which the filament center is at the center of the image.