Hotaru: intuitive manipulation techniques for projected displays of mobile devices

  • Authors:

  • Masanori Sugimoto;Kosuke Miyahara;Hiroshi Inoue;Yuji Tsunesada

  • Affiliations:

  • Graduate School of Frontier Informatics, University of Tokyo, Chiba, Japan;Graduate School of Frontier Informatics, University of Tokyo, Chiba, Japan;Graduate School of Frontier Informatics, University of Tokyo, Chiba, Japan;Graduate School of Frontier Informatics, University of Tokyo, Chiba, Japan

  • Venue:
  • INTERACT'05 Proceedings of the 2005 IFIP TC13 international conference on Human-Computer Interaction
  • Year:
  • 2005

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Abstract

Mobile devices (cellular phone, PDA, etc.) have so far been personal tools. Due to their evolution to multi-functionality, however, the devices have begun to be used by multiple people in co-located situations. This paper discusses near future technologies: a mobile device with a projector and intuitive manipulation techniques by using a video camera mounted on the device. In today’s technologies, it is difficult to realize a mobile device with a small and lightweight projector that still retains the feature of mobility. Therefore, we have developed a system to project displays of mobile devices on a table, a floor, or a wall, by tracking their three-dimensional positions and orientations and using an existing LCD projector. The proposed system called Hotaru (a firefly, in English) allows users to annotate/rotate a picture or a document in a mobile device by touching its projected display with their fingers. Users can intuitively transfer a file between multiple devices by making their projected displays overlapped. Informal evaluations of Hotaru indicated that the proposed manipulation techniques could effectively support multiple people in co-located situations in conducting their tasks.