215295.fig.008a
(a)
215295.fig.008b
(b)
215295.fig.008c
(c)
215295.fig.008d
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215295.fig.008e
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215295.fig.008f
(f)
Figure 8: Crack detection using the level set-based active contour method: (a) the selected ROI, also shown in Figure 6; (b) the initialized contours; (c) and (d) intermediate detection results; (e) the converged result; (f) the cleaned detection result with contours for the air pockets removed.