Fig. 1. Flow chart of pulmonary fissure detection

Fig. 2. (a) DoS filter analysis; (b) DoS kernel orientation

Fig. 3. (a) Original image; (b) θmax; (c) θmin

Fig. 4. (a) Pulmonary fissure enhancement; (b) sagittal plane; (c) coronal plane; (d) axial plane

Fig. 5. Treating processes. (a) Pulmonary fissure enhancement; (b) multi-plate processing; (c) pulmonary fissure identification

Fig. 6. Pulmonary fissure segmentation. (a) Pulmonary fissure identification; (b) surface curvature; (c) pulmonary fissure segmentation; (d) the black rectangle is zoomed for investigation in Fig. (b)

Fig. 7. (a)(g) Manual reference; (b)(h) proposed method; (c)(i) DoS method; (d)(j) Fissureness method; (e)(k) Wiemker method; (f)(l) Klinder method

Fig. 8. Quantitative evaluation