Getting Yourself Superimposed on a Presentation Screen
Kenji Funahashi
Nagoya Institute of Technology
Gokiso-cho, Showa-ku, Nagoya, Japankenji@nitech.ac.jp

Yusuke Nakae
Nagoya Institute of Technology(present: System Research Co.,Ltd.)ynakae@center.nitech.ac.jp

ABSTRACTRESULTS AND CONCLUSIONSWe propose using intuitive interface presentation support software. A presenter is superimposed on a screen.

We used Microsoft Kinect and Windows SDK Ver. 1.8
API to build a pilot system on a Windows PC. It also
has a horizontal inversion mode to use this system while
watching laptop monitor (Figure 1 and 2). We got positive evaluations through an experiment; i.e. it is easy tomove, and it is helpful for presenting slide shows. Despite some favorable results, bugs remain. We can noterase notes yet, meaning that we should implement anerase function, and we would also like to recognize a pagefeeding action, leaving them for future work.

Author Keywords

Presentation support; Augmented reality; 3D interface.
ACM Classification Keywords

H.5.1 Information Interfaces and Presentation: Multimedia Information Systems—Artificial, augmented, andvirtual realities
INTRODUCTION

When attending a conference some audiences lose attention following points on the screen. Although presenters
usually use a pointer rod or a laser pointer, they are
not convenient or easily visible on a large screen. Acamera and another screen are also needed to show gestures. In this paper we propose using intuitive interface
presentation support software [1]. A presenter is superimposed onto a screen, and the person can draw thereinteractively. Realizing presenter movement on screenby recognizing natural and small actions, the person canmove within a limited stage space. Presenters can point
to any important areas and draw supplementary itemswith their own hand through our software, and of courseshow gestures on a large screen. It is expected that audiences will be better able to understand and focus.

Figure 1. System appearance.

MOVEMENT AND DRAWING

It is necessary to move within a limited area. First thepresenters knee angles are obtained. When one of themis less than the pre-defined threshold value, the personon the screen is moved exaggeratedly in all directions
according to their actual movement and the angle. It isneeded to change position vertically on the screen while
superimposed smaller. When both of the knee angles areless than the other threshold, the person moves down at
a speed depending on the angles. When lifting one arm
to stretch out, the person moves up according to theextent that the arm is lifted. The locus of the handis also drawn on the screen while the hand position ishigher than the waist and at the back of the head.
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SUI’14 , October 4–5, 2014, Honolulu, HI, USA.
ACM 978-1-4503-2820-3/14/10.
http://dx.doi.org/10.1145/2659766.2661203

Figure 2. Movement and drawing.

ACKNOWLEDGMENTS

This work was supported in part by JSPS KAKENHI
Grant Number 24501186.
REFERENCES

1. Uchiyama, K., Nakae, Y., and Funahashi, K.
Presentation support software superimposing
presenter. In Proc. 19th Annual Conference of the
Virtual Reality Society of Japan (2014, in Japanese).