Figure 4

Segmentation results of Figure 3. The partitioning class k: is two in (a) and three in (b-e) and five in (f). In each group, the six images, respectively, show, from left to right, the resultant image after Frost filtering procedure, the resultant image after morphological closing procedure, the resultant image after MSER procedure, the final segmentation result of the proposed method, the segmentation result using Nystrom method, and the segmentation result using Ncut method implemented by Cour et al. [33]. The adjusting parameters σ and η are set in each group (from (a) to (f)) to σ = 0.7,0.6, 0.5,0.4,0.5,0.5 and η = 0.6,0.9,0.4,0.6,0.8,0.8.