A shuttlecock serving violation judgment method based on machine vision

Abstract

The invention provides a method for judging a serving violation in a badminton serving process by using a computer open-source vision library (OpenCV) as an identification means, and relates to the fields of image processing, artificial intelligence and the like, aiming at the problems of excessive subjectivity judgment of serving hands and waist violations in the badminton serving process in a badminton court. The method comprises the following steps: acquiring a video image frame sequence of an athlete during serving, and performing motion detection preprocessing to achieve the purpose of improving the system efficiency; The method comprises the following steps: establishing a badminton image data set, extracting LBP digital image features, carrying out classifier training, and determining the position of a badminton during serving; Calculating the positive and negative of the relative angle of the racket during serving by using OpenCV to judge whether serving is passed or not; And establishing a relation equation between the badminton top image point and the vertical foot image point, and calculating the terrain clearance of the serving point to judge whether the serving is over-waisted or not. The image processing technology is mainly applied to the badminton court, and the method has the advantages of being simple in detection and practical.

Description

technical field [0001] The invention relates to the fields of image processing and artificial intelligence, in particular to a method for judging a badminton serve violation based on machine vision. Background technique [0002] In badminton competition, there are express regulations on all actions of athletes, and referees are required to make judgments according to the rules of the game. However, the referee's penalty behavior may be affected by many factors such as the athlete's own desire to win the game and personal habits, which leads to some referees not following the rules of the game to make penalties, resulting in misjudgments, misjudgments or even black calls and so on. Violation judgment based on computer vision uses a third-party mechanism that is not limited by subjective factors to help referees make auxiliary judgments, which will play an increasingly obvious role in the field of video images in the future. [0003] Some existing badminton auxiliary equipme...

AI Technical Summary

Problems solved by technology

[0003] Some existing badminton auxiliary equipment cannot meet the above requirements. Hawkeye, also known as instant playback system, works on the principle of capturing images from multiple high-definition cameras, and rebuilding the playback sphere with the help of virtual technology after calculation by multiple high-performance computers. The trajectory of the ball is only used to judge whether the ball is out of bounds in badminton

The other two technologies are digital detection system and online inspection auxiliary device. The digital detection system mainly uses optical real-time tracking and capture equipment, data information processing system, and digital display equipment to realize the capture of badminton, and calculates the corresponding coordinates to judge whether it is out of bounds. , the disadvantage is that the game ball is required to be sprayed with infrared and is susceptible to infrared interference outside the field, and there is a large error in the calculation of the coordinates of the ball

The line inspection auxiliary device is to lay a strip-shaped insulating substrate with positive and negative wires on both sides on the court boundary, and attach a conductive material to the badminton ball, and use the electric induction between the ball and the sideline when it touches the ground to realize the judgment of the ball's landing point. The disadvantage of this type of device is that the accuracy is easily affected by wet weather and the sweat of the player, and it also requires changes to the standard construction of the shuttlecock

[0004] To sum up, the current auxiliary judgment methods are all used to judge whether the ball is out of bounds, but cannot be used to judge violations, and cannot complete the punishment for service violations in badminton matches

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