Research on Arm Stroke Track Positioning in Backstroke Training Based on Layered Teaching Method

Traditional physical education teaching method is one-way in which teacher's output physical education teaching tasks and methods to students, execute teaching contents, feedback teaching effects and evaluate them centrally. Under this teaching mode, by analyzing the distribution of stroke track of backstroke training arm, combining with students' subjective initiative, the stroke track of backstroke training arm is located and identified, and hierarchical teaching method is adopted to detect stroke track of backstroke training arm and design teaching plan. This paper puts forward a method of positioning the stroke track of backstroke training arm based on layered teaching method. A three-dimensional visual surface reconstruction model of the visual image of the stroke movement of backstroke training arm is constructed. Combining with the sampling results of the visual characteristics of the stroke movement of backstroke training arm, the visual tracking and block matching of the visual image of the stroke movement of backstroke training arm are carried out. The edge contour of arm radian of the stroke movement image of backstroke training arm is detected by template automatic matching and wavelet multi-scale decomposition method. The visual space region fusion model of the visual image of the backstroke training arm stroke movement is established, and the arc trajectory of the arm stroke movement visual image of the backstroke training arm is automatically located according to the regularized quantitative feature analysis results. The simulation results show that this method has high accuracy in positioning the stroke trajectory of backstroke training arm, and improves the ability of tracking and detecting the stroke trajectory of backstroke training arm.