 |
| Figure 1: Example of point of gaze distribution when observing
in 2D |
The Beginning of the 3D Era and the Boom Phenomenon
2010 has been called the beginning of the 3D era, a year in which
the term 3D frequently appeared in the media. Here, I use 3D to
mean three-dimensional images, or to give them their proper name,
stereoscopic images, reproduced to appear in front of or behind the
screen. The word stereoscopic was coined by the inventor of the
stereoscope, Sir Charles Wheatstone, who first used the term in a
paper published in 1838. It derives from the Greek words stereos,
meaning solid, and scope, meaning viewing instrument.
The phenomenon of periodic booms in 3D is often pointed out. These
were mainly 3D movie booms that occurred in the 1950s and 1980s,
and the present day is sometimes referred to as the third boom. The
fact that 3D has until now never developed beyond a temporary fad
is an indication of the difficulty in popularizing it.
Nevertheless, the repeated appearance of such booms does suggest
that 3D is a kind of dream technology for human beings. Here I
would like to mention the characteristic ripple effect of present
day 3D. The rapid development outside the film industry of
3D-compatible TVs, game consoles and mobile devices currently being
announced and released by various manufacturers has exceeded the
expectations of most researchers such as myself, as well as
industry related people.
Issues of Present Day 3D
Although the spread of 3D is expected to result in the creation of
new industries and culture, it is still uncertain what the merits
and added value will be for users. When asked, “What is the
advantage of 3D movies or TV?” it is not enough to simply
answer that “things leap out of or into the screen”.
Scientific verification of whether 3D can really convey different
sensations than 2D, or of what elements of 3D people find
appealing, is urgently required so that the current boom does not
turn into just another temporary fad.
At our laboratory, we have been conducting an experimental study of
current 3D issues as they relate to the user experience. From
Figure 1 we can see that the line of sight is concentrated mostly
on people, and especially faces, when watching a movie in 2D.
Figure 2 is the result when viewing the same movie in 3D. Here we
see that the line of sight is concentrated not only on
people’s faces but also on the objects in the foreground. To
clarify the cause of such a distinctive difference, we have
performed a range of detailed analyses, especially of the link with
the spatial construction of visual data.
Initiatives toward the Future of 3D
While tackling the present day tasks of explaining viewer
recognition and emotional aspects, our laboratory is also facing
the challenge of looking to the future of 3D. One such direction is
new applications of 3D. An example of this is three-dimensional
character blocks for literacy learning developed through joint
research with the Division of Developmental Neuropsychology at the
National Center for Child Health and Development. The intention is
to utilize spatial reasoning capacity in literacy learning by
adding information of depth according to the stroke order of a
character to its ordinary two-dimensional shape. Such a conceptual
shift from representing real shapes three-dimensionally to
envisioning a specific effect and venturing to express it
three-dimensionally could produce an unprecedented demand for
3D.
Another direction we have taken relates to the extension towards
perceptual experience through 3D representation other than vision.
Figure 3 shows an example of this, a tactile behavioral illusion
system. By combining 3D and tactile stimulation based on certain
measurements, this system enables people to experience sensations
that have not actually been triggered. Specifically, we can create
an illusion related to bodily sensation, a feeling that a
stationary object touching one’s hand is moving across the
surface of that hand. Such a shift in awareness from a single sense
to the integration of multiple senses, or in other words, from
vision to brain function, could be vital in shaping the 3D-based
media of the next generation.
The desire to see remote things or to present them so that they can
be seen is a fundamental trait in human beings. That is to say,
interest in and expectations for 3D are perfectly natural, and so
the future of 3D also seems linked, to some extent, to human
potential.
About the author:
Takashi Kawai, Professor, Faculty of Science and Engineering,
Waseda University
Graduated in 1993 from the Department of Human Health Sciences,
School of Human Sciences, Waseda University. Having completed a
doctoral course at Waseda University’s Graduate School of
Human Sciences in 1998, he went on to hold several positions at the
University, including Research Associate at the School of Human
Sciences, Full-time Lecturer at the Global Information and
Telecommunication Institute (GITI), and Assistant Professor at the
Graduate School of Global Information and Telecommunication Studies
(GITS). Since 2008 he has held the concurrent positions at Waseda
University of Professor at GITS and Professor in the Department of
Intermedia Art and Science at the School of Fundamental Sciences
and Engineering. Dr. Kawai has a doctorate in Human Sciences. His
primary works include Fundamentals of 3D Image Expression [3D
Rittai eizou hyougen no kiso] |
