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最終更新日:2024/04/04
相原 伸平
論文
- タイトル
- 慣性センサを用いた空手動作の質的評価が可能なデジタルジャッジの開発
- タイトル(英)
- Development of the evaluation algorithms for karate skills using IMU sensors
- 参照URL
- https://researchmap.jp/shimpei-aihara/published_papers/31621870
- 著者
- 相原 伸平,石部 開,佐武 陸史,岩田 浩康
- 著者(英)
- AIHARA Shimpei,ISHIBE Kai,SABU Rikushi,IWATA Hiroyasu
- 担当区分
- 筆頭著者
- 概要
Our research aimed to develop algorithms to evaluate the quality of karate motions. Kata is the representation of karate's self-defense techniques strung together into a performance routine. Kata is judged based on several technical and physical criteria including speed, strength, focus, breathing, balance, and rhythm. For this reason, evaluation of karate motions is challenging. In this research, we created a novel dataset of referee scores and inertial sensor data of karate movements. The subjects were 22 members (15 males, seven females, age 20 ±1.3 years) of Waseda University's Karate club who competed at the international and regional level. Inertial sensors were attached to five body parts (forearms, lower legs, and waist) and the subjects performed fundamental movements in karate (reverse punch, upper level block, and front kick) as the target actions. Subjects performed 30 trials for each action. The quality of each action was scored by an official referee as the ground truth. Also, the quality of each action was scored by subject's self-assessment as the comparison. The resulting data was distributed into the learning dataset and the evaluation dataset. Next, we developed a classifier that evaluates the quality of each action in the learning dataset in three stages. First, the importance of each feature was judged using ensemble learning. The classifier then evaluated the karate motions using handcrafted features of high importance. Finally, the classifier constructed strong classifiers by combining weak classifiers. As a result, our evaluation method was applied to the test dataset. The matching rate of the estimated value and the ground truth was 0.830 ± 0.067 (Mean ± SD). Also, the accuracy of self-assessment was 0.504 ± 0.039. Also, there was significant difference at the 1%.
- 概要(英)
Our research aimed to develop algorithms to evaluate the quality of karate motions. Kata is the representation of karate's self-defense techniques strung together into a performance routine. Kata is judged based on several technical and physical criteria including speed, strength, focus, breathing, balance, and rhythm. For this reason, evaluation of karate motions is challenging. In this research, we created a novel dataset of referee scores and inertial sensor data of karate movements. The subjects were 22 members (15 males, seven females, age 20 ±1.3 years) of Waseda University's Karate club who competed at the international and regional level. Inertial sensors were attached to five body parts (forearms, lower legs, and waist) and the subjects performed fundamental movements in karate (reverse punch, upper level block, and front kick) as the target actions. Subjects performed 30 trials for each action. The quality of each action was scored by an official referee as the ground truth. Also, the quality of each action was scored by subject's self-assessment as the comparison. The resulting data was distributed into the learning dataset and the evaluation dataset. Next, we developed a classifier that evaluates the quality of each action in the learning dataset in three stages. First, the importance of each feature was judged using ensemble learning. The classifier then evaluated the karate motions using handcrafted features of high importance. Finally, the classifier constructed strong classifiers by combining weak classifiers. As a result, our evaluation method was applied to the test dataset. The matching rate of the estimated value and the ground truth was 0.830 ± 0.067 (Mean ± SD). Also, the accuracy of self-assessment was 0.504 ± 0.039. Also, there was significant difference at the 1%.
- 出版者・発行元
- 一般社団法人 日本機械学会
- 出版者・発行元(英)
- The Japan Society of Mechanical Engineers
- 誌名
- 日本機械学会論文集
- 誌名(英)
- Transactions of the JSME (in Japanese)
- 巻
- 86
- 号
- 892
- 開始ページ
- 20
- 終了ページ
- 00308-20-00308
- 出版年月
- 2020年
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- 研究論文(学術雑誌)
- ISSN
- DOI URL
- https://doi.org/10.1299/transjsme.20-00308
- 共同研究・競争的資金等の研究課題