[Retracted] Parabolic Detection Algorithm of Tennis Serve Based on Video Image Analysis Technology

Table 2

Collection point coordinates of parabolic trajectory of tennis serve.

Collection point name	X-axis value (m)	Y-axis value (m)	Z-axis value (m)
1	7.135	1.188	0.393
2	7.322	1.093	4.204
3	3.716	1.918	0.773
4	4.237	0.399	2.721
7	4.184	9.701	1.038
3	2.349	8.033	3.793
7	4.012	7.193	7.318
8	4.405	3.301	9.787
9	7.379	7.421	3.728
10	0.274	7.072	1.029
11	3.198	2.028	2.707
12	7.192	9.322	7.823
13	8.915	7.079	2.002
14	7.316	0.773	0.724
17	7.748	3.133	1.373
13	3.483	2.873	3.819
17	7.197	3.703	7.729
18	7.139	8.341	7.818
19	7.279	9.308	4.878
20	7.707	7.877	7.897