Online Estimation Method of Badminton Players' Grip Position Error Based on Particle Filtering

In order to solve the problems of low accuracy and long time consumption of traditional badminton players' grip position error estimation methods, a new online estimation method of badminton players' grip position error based on particle filter was proposed in this paper. Infrared array sensor is used to collect badminton players' grip posture images, and the collected images are de-noised and segmenting. The probability density of pixel points of the processed images is estimated, and the grip posture area and the contour features of the grip posture are extracted, so as to realize the recognition of badminton players' grip posture. On this basis, the similarity of the grip pose sequence and the standard grip pose sequence were taken as two kinds of particles. By comparing the similarity of the two kinds of particles, the final online estimation result of the grip pose error was obtained. The experimental results show that the maximum error rate of badminton players' grip position recognition is only 3.96%, the error estimation accuracy is between 95.76%–98.25%, and the estimated time is between 0-0.5s.

I. Introduction

Since badminton was introduced into our country, it has been loved by the people, and now it has become a fitness sport with a very broad mass base. With the continuous development of badminton, it has become an important event in major sports events, so how to improve the performance of badminton athletes has become an urgent problem for badminton coaches to solve [1]. Because of the complexity of badminton technology, so the requirements for its action details are more rigorous. In all badminton movement details, grip posture is the foundation of play badminton, and also is the important way of playing the score, the badminton players moving position, swing the racket back and hit the ball quality influence, not only that the right grip position can make the athletes rapid transformation in the process of competition strategy, to gain higher achievement. Therefore, it is necessary to estimate the grip posture error of badminton players, so as to continuously adjust the grip posture according to the estimated results, so that badminton can fully complete badminton technical movements in training and on the court, and improve its comprehensive performance [2].