Figure 7.

The proposed method is robust to the selection of the threshold value during contour initialization. (a) Initialized contour obtained with a lower threshold value (10 nm) and corresponding converged contour obtained using the proposed method. (b) Initialized contour obtained with a higher threshold value (18 nm) and corresponding converged contour. (c) Comparison of the initialized contours and the converged contours obtained with the different threshold values. The coverged contours are superimposed on each other, which indicates that the proposed method is robust to the selection of the threhold value.