![](bg1.png)
Real-time Integral Photography Holographic Pyramid
using a Game Engine
Shohei Anraku, Toshiaki Yamanouchi and Kazuhisa Yanaka
Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi-shi, Kanagawa-ken, Japan
Keywords: 3D Display, Autostereoscopic, Integral Photography, Holographic Pyramid, Game Engine, Unity.
Abstract: A new holographic pyramid system that can display an animation of integral photography images that appear
to be floating is developed using a game engine and by writing its shader. An animation of the object, as
viewed from the front, rear, left, and right, are displayed on the four surfaces of the pyramid. All animations
are autostereoscopic and are provided in horizontal and vertical parallaxes. The user can rotate the object left
or right by operating the keyboard. This system can be regarded as an autostereoscopic mixed-reality system
because real and virtual objects can coexist in one pyramid.
1 INTRODUCTION
A holographic pyramid is a display that reflects the
image displayed on a flat panel display, such as a
liquid crystal display (LCD) on the surface of a
quadrangular pyramid made of a half mirror, so that
the image appears as an object floating in the
pyramid. Normally, the flat panel display is 2D, thus
the image displayed is a 2D image without depth, as
shown in Fig. 1. However, by displaying 3D images
in the flat panel, objects with depth can be manifested.
Among various 3D display systems, integral
photography (IP), which was proposed by Lippmann
(Lippmann 1908), is highly suitable for this purpose
because horizontal and vertical parallaxes can be
obtained without using stereo glasses. IP can be
constructed simply by placing a fly’s eye lens on top
of the LCD, as shown in Fig. 2. Yamanouchi et al.
(Yamanouchi et al. 2016) developed a holographic
pyramid system using IP in which a fly’s eye lens is
integrated between the flat panel display and the
pyramid, as shown in Fig. 3. Moreover, 3D CG
animation of IP images can be played with the
system, but images had to be pre-rendered because of
the heavy processing. Another issue of the system is
that only the same image can be displayed on the four
surfaces of the pyramid. It would be better if the
image of the object viewed from each direction is
displayed on the side of the pyramid.
Figure 1: Conventional holographic pyramid system.
Figure 2: Simple integral photography system.
2 METHOD
2.1 Use of a Game Engine and Its
Shader
We introduced a game engine (Unity 5) to solve these
problems.
Anraku, S., Yamanouchi, T. and Yanaka, K.
Real-time Integral Photography Holographic Pyramid using a Game Engine.
DOI: 10.5220/0006647106030607
In Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2018) - Volume 4: VISAPP, pages
603-607
ISBN: 978-989-758-290-5
Copyright © 2018 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved
603