Diagnosis model for action problems of table tennis beginners based on improved DTW algorithm

• Published in: Systems and soft computing Vol. 7; p. 200350
• Main Author: Xin, Zhiguo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2025; Elsevier
• Subjects: Action detection; Data processing; Joint motion trajectory; Problem diagnosis; Sensors; Similarity; Table tennis; Similarity; Problem diagnosis; Data processing; Action detection; Sensors; Table tennis; Joint motion trajectory
• ISSN: 2772-9419; 2772-9419
• DOI: 10.1016/j.sasc.2025.200350

•Combining improved DTW algorithm with Azure Kinect sensor.•Use segmented cubic spline interpolation and Delphi method to screen joint points.•Improve the standardization of beginner movements and speed control. Table tennis is a highly technical sport. Beginners often struggle to correct and optimize their movements because they lack professional knowledge and guidance. To enhance the skills of beginners, a diagnosis model for table tennis beginner movement problems based on sensors and an improved dynamic time-warping algorithm is proposed. This model combines motion data collected by the Azure Kinect sensors. First, the data is pre-processed. Then, missing data is filled in using segmented cubic spline interpolation. Next, the mean filtering algorithm is used to denoise the data. Finally, the start and end positions of each action are determined to achieve effective action segmentation. The body pose vectors are reconstructed and normalized, and finally, the action category templates are created using Euclidean centroids. The experimental results show that the action detection accuracy of this model is as high as 99.54 %, which is superior to the comparison model. After training with the diagnostic results of the model, the similarity of beginners' motion trajectories in the Z-axis direction increases from below 92 % to 97.90 %, and the similarity of their movement speed increases from below 85 % to 97.97 %. This study diagnoses the movement problems of beginner table tennis players through technical means and improves their technical level, providing a new technical approach to table tennis training. [Display omitted]