應用肢體引導於擴增實境遠距協作-以太極拳學習為例

Abstract

太極拳是一項包含著連續肢體動作的中國傳統武術。在傳統上來說，太極拳的學習會要求指導者與學習者在同一個空間內。但是，再遠距離教學的需求下，現有的替代方案像是視訊教學與太極拳自學系統都有著各自的缺點。在本研究中，我們提出了一套結合了擴增實境與WIMP (視窗、圖標、選單、指標) 的遠距離協作系統。此系統包含了提供沉浸式環境的自學子系統與作為溝通工具的指導子系統。在指導子系統中，我們設計了位於虛擬鏡子上的2D的視覺引導標示與位於學習者肢體上的3D視覺引導標示作為肢體引導的媒介。在兩項使用者研究中，我們各自比較了指導者與學習者對於2D與3D視覺引導標示的想法。使用者在兩種視覺引導標示都給予了高評價，但使用者認為3D的視覺引導標示比起2D版本，提供學習者更多的指導資訊，並提供指導者更多的引導功能。

Tai-Chi Chuan (TCC) is a famous Chinese exercise with body movement sequences, which traditionally requires the instructor and the learner to be collocated. However, in situations where the instructor and the learner are not in the same place, alternative methods like video conferencing and TCC self-learning exist disadvantages. In this paper, we propose a remote collaboration system combining Augmented Reality (AR) and Windows-Icon-Menu-Pointer (WIMP) for TCC learning. It contains a self-learning subsystem providing an immersive environment and a guidance subsystem as a communication tool. For pose guidance, we design the 2D annotations on the augmented mirror in the virtual environment and the 3D on-body annotations imposed on the learner's joints. 2 user studies were conducted to compare the two types of annotations from the perspective of the instructor and the learner. The result shows that the 2D and 3D annotations both receive high reviews. The 3D annotation performs better by including more instructing information for the learner and more annotation features for the instructor.