Automatic identification system and method for offside of football based on video analysis

Abstract

The invention discloses an automatic identification system and an automatic identification method for offside of a football based on video analysis. The method is characterized by comprising the steps of: collecting an image in a video, extracting a football field and detecting athletes and the football; extracting characteristic lines of the football field and rebuilding a coordinate of a plane of the football field; and finishing identification of the offside in the football match video automatically. The automatic identification system and the automatic identification method disclosed by the invention identify the offside behaviors through image processing of a computer, have the advantages that the identification speed is quick and the result is accurate, the workload and the error of an assistant referee can be reduced to a large extent, artificial factors for controlling the match are greatly removed and the reliability of penalties is improved. The designed offside detecting algorithm is based on plane coordinate scores of the athlete, so that the plane coordinates of the football field can be recovered by shooting with a single camera and solving a projection matrix, and further the lengthy computations on analysis of a plurality of cameras can be saved. According to the method, the offside condition of international football matches can be monitored in a better way, and the purposes of assisting the penalties and reducing the workload and error of the referee are realized.

Description

technical field [0001] The invention belongs to the technical field of sports, and in particular relates to a system and method for automatically judging football offside based on video analysis. Background technique [0002] In football matches, whether offside is mainly judged by the assistant referee. The judgment of offside is based on the moment of passing the ball, not the moment the football hits the ground. Manual referees are limited by their own attention, reaction ability, physical function, and personal quality. Only manual referees cannot make an objective and fair judgment of offside. Therefore, it is very necessary to use computer technology to design an algorithm for automatically judging offside. [0003] At present, most sports video content analysis systems in the world are concentrated in the fields of tennis, basketball and baseball, while more people in football are keen to analyze the color recognition and strategy implementation of intelligent robots...

AI Technical Summary

Problems solved by technology

The main research hotspots in China focus on the extraction of video semantic objects, including the detection of the stadium, the detection of balls and players, and the three-dimensional reconstruction of the scene. These technologies are all concentrated in video analysis and not reflected in the penalty game

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