[Retracted] Badminton Path Tracking Algorithm Based on Computer Vision and Ball Speed Analysis

Table 4

Number of occurrences of various receiving and serving techniques.

Year	Rubbing	Push the ball	Pick the ball	Hook kick
2016	34	18	19	27
2017	32	13	14	23
2018	17	19	18	21
2019	15	22	16	11
2020	25	17	28	26