In table tennis, tactics specified by three consecutive strokes represent the high-level competition strategies in matches. Effective detection and analysis of tactics can reveal the playing styles of players, as well as their strengths and weaknesses. However, tactical analysis in table tennis is challenging as the analysts can often be overwhelmed by the large quantity and high dimension of the data. Statistical charts have been extensively used by researchers to explore and visualize table tennis data. However, these charts cannot support efficient comparative and correlation analysis of complicated tactic attributes. Besides, existing studies are limited to the analysis of one match. However, one player's strategy can change along with his/her opponents in different matches. Therefore, the data of multiple matches can support a more comprehensive tactical analysis. To address these issues, we introduced a visual analytics system called Tac-Miner to allow analysts to effectively analyze, explore, and compare tactics of multiple matches based on the advanced embedding and dimension reduction algorithms along with an interactive glyph. We evaluate our glyph's usability through a user study and demonstrate the system's usefulness through a case study with insights approved by coaches and domain experts.

中文翻译：

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Tac-Miner：多场乒乓球比赛的视觉战术挖掘


在乒乓球运动中，三连击指定的战术代表了比赛中高水平的比赛策略。有效的战术检测和分析可以揭示球员的比赛风格以及他们的优势和劣势。然而，乒乓球的战术分析具有挑战性，因为分析人员常常会被大量和高维度的数据淹没。研究人员广泛使用统计图表来探索和可视化乒乓球数据。然而，这些图表无法支持复杂战术属性的有效比较和关联分析。此外，现有的研究仅限于对一场比赛的分析。然而，在不同的比赛中，一名球员的策略会随着他/她的对手而改变。因此，多场比赛的数据可以支持更全面的战术分析。为了解决这些问题，我们引入了名为 Tac-Miner 的可视化分析系统，允许分析师基于先进的嵌入和降维算法以及交互式字形，有效地分析、探索和比较多个比赛的策略。我们通过用户研究评估字形的可用性，并通过案例研究以及教练和领域专家认可的见解来展示系统的实用性。