Developing an AR Lecture Recording System with Direct Manipulation of Virtual Slides by Physical Objects

  • Yuma Ito Nagoya Institute of Technology
  • Masato Kikuchi Nagoya Institute of Technology
  • Tadachika Ozono Nagoya Institute of Technology
Keywords: Augmented Reality, Lecture Video Making Support, Human Computer Interaction, Direct Manipulation, Image Processing


The increasing demand for lecture videos needs support for making them. Some lecturers conduct conventional and physical-style presentations in the real world. However, videos recording slides physically displayed by a projector are blurry than videos recording slides on a display monitor. We aim to develop a lecture recording system having a direct manipulation interface between virtual slides in augmented reality (AR) space and users in the real world. This research has three subgoals; sharp slide images in lecture videos, direct manipulation on virtual slides, and hand-writable virtual slides using ordinary physical objects such as whiteboard markers. First, we implemented an AR lecture recording system with an AR slide function, a direct manipulation interface on AR slides, and a handwriting function with whiteboard markers. Then, we conducted experiments in terms of performance and usability. As a result, the fps of our recording system is 30 fps or more. First, the result of the task-based user experiments achieved -17.85 seconds. Second, the questionnaire result of the seven-point likert scale improved +2.26 points. Finally, we concluded that our system is practical enough as a lecture recording system with a direct manipulation interface on AR slides. This paper describes the implementation and its evaluations.


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