Detection and segmentation results of two testing images randomly selected from the two data sets. Row 1 and row 2 show the comparison of the detection results: (a) is the original image patches. (b)–(f) are the corresponding results obtained by LoG [1], IRV [7], ITCN [3], SPV [8], and the proposed method. Row 3 and row 4 show the comparison of the segmentation results: (a) is the ground truth. (b)–(f) are the corresponding results obtained by MS, ISO [5], GCC [1], RLS [8], and the proposed method.