Figure 4

Algorithm to reduce the number of seeds. (A) The gray area represents the “surrounding area” of each seed. (B) An example of seeds that is to be reduced. The number of each seed represents the order of seeds that is sorted by its position. (C) The first algorithm to check the seeds. A balloon means that next seed is in surrounding area, and a x-mark means not. CLAST removes the seeds with x-mark. (D) The second algorithm to check the seeds. A x-mark means that next seed is in surrounding area, and a baloon means not. CLAST removes the seeds with x-mark. (E) The seeds that remains in this example. The seeds are isolated, there is no seeds in surrounding area.