[Retracted] Tennis Video Target Tracking Based on Mobile Network Communication and Machine Learning Algorithm

Table 4

Results of the calculation method for the center coordinates of each tennis profile.

Method	x coordinate	y coordinate	Error
Direct method/geometric center	356	369	23.85
Maximum inscribed circle method	355.8	357.4	12.39
Grayscale moment method	358.92	350.14	0.85