Cross Product and Partitioned Filtering-Based Graham Convex Hull for Buoy Drifting Area Demarcating

Figure 1

Frequency distribution of buoy position points. (a) Position number distribution of 3# buoy. (b) Frequency distribution of 3# buoy. (c) Position number distribution of 4# buoy. (d) Frequency distribution of 4# buoy.

(a)

(b)

(c)

(d)