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A Large Effective Touchscreen Using a Head-Mounted Projector

Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570, Japan
Author to whom correspondence should be addressed.
Information 2018, 9(9), 235;
Received: 17 August 2018 / Revised: 4 September 2018 / Accepted: 8 September 2018 / Published: 18 September 2018
(This article belongs to the Special Issue Wearable Augmented and Mixed Reality Applications)
PDF [5633 KB, uploaded 18 September 2018]


In our previous work, we proposed a user interface in which a user wears a projector and a depth camera on his or her head and performs touch operations on an image projected on a flat surface. By using the head-mounted projector, images are always projected in front of the user in the direction of the user’s gaze. The image to be projected is changed according to the user’s head pose so as to fix the superimposed image on the surface, which realizes a large effective screen size. In this paper, we conducted an experiment for evaluating the accuracy of registration by measuring the positional and rotational errors between the real world and the superimposed image using our experimental system. As a result, the mean absolute errors of translation were about 10 mm when the user stopped his head, and the delay was estimated to be about 0.2 s. We also discuss the limitations of our prototype and show the direction of future development. View Full-Text
Keywords: augmented reality; tabletop interface; peephole interaction; projector-camera system; depth camera augmented reality; tabletop interface; peephole interaction; projector-camera system; depth camera

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Kemmoku, Y.; Komuro, T. A Large Effective Touchscreen Using a Head-Mounted Projector. Information 2018, 9, 235.

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