Fig. 5
Results of the segmentation using the proposed method. a A trinarized image of dust derived from Fig. 2b using a single threshold value. The white region is the positive region when using the larger threshold value, pL. The gray regions including the white one are positive regions when using the smaller threshold value, pS. b A trinarized image of dust (white) and WIC (gray) derived from Fig. 2b and e using the combination of two threshold values. pL and pS are 0.95 and 0.5, respectively