举例说明:
BW =
0 1 1 0 0 0 0 0
1 1 1 0 1 1 0 0
1 1 1 0 1 1 0 0
1 1 1 0 0 0 1 0
1 1 1 0 0 0 1 0
1 1 0 0 0 0 1 0
1 1 1 0 0 1 1 0
1 1 1 0 0 0 0 0
K= bwlabel(BW,8)
K =
0 1 1 0 0 0 0 0
1 1 1 0 2 2 0 0
1 1 1 0 2 2 0 0
1 1 1 0 0 0 2 0
1 1 1 0 0 0 2 0
1 1 0 0 0 0 2 0
1 1 1 0 0 2 2 0
1 1 1 0 0 0 0 0