“…DBS method was compared with 27 state-of-the-art methods in Section 7.2.1. 27 state-of-the-art methods are CB [34], FT [23], SEG [44], RC [14], SVO [17], LRR [39], SF [45], GS [37], CA [33], SS [47], HS [7], TD [48], MR [24], DRFI [25], PCA [41], HM [38], GC [36], MC [40], DSR [35], SBF [43], BD [42], SMD [46], BL [32], MCDL [9], MDF [8], LEGS [10], and RFCN [11]. These methods not only are very popular but also cover many types.…”