Image Processing Reference
In-Depth Information
This configuration allows a tradeoff between spatial and angular information inside
each MI (see Sect.
4.2.4
). Examples of plenoptic handheld cameras exist on the
consumer market like Lytro
s and Raytrix
s products [
9
,
10
].
'
'
4.2.2 Display
Several light-field display systems currently exist. There are many experimental or
research projects and also commercial products. An overview of these systems has
been presented during the October 2013 MPEG FTV meeting [
6
]. In the following,
we classify them into two sections according to the content they take as input: super
multi-view content or integral images.
4.2.2.1 Super Multi-View Displays
SMV display systems take tens to hundreds of views as input. Several display
systems are based on a front or rear projection as illustrated in Fig.
4.5
. For
example, this is the case for the REI (Ray Emergent Imaging) system [
12
] devel-
oped by NICT (which uses 170 projection units) or for the Holovizio C80 [
13
]
developed by Holografika (which uses 80 projections units). Each projection unit
projects from a different angle onto the screen. The screen surface has anisotropic
properties (which can be obtained optically or with a holographic diffuser for
example), so that the light rays can only be seen from one direction which depends
on the projection direction.
Another kind of system is presented in [
6
] as “all-around.” These display
systems are presented in a table-top configuration, hence they offer a viewing
angle of 360 degrees to the user who can walk/turn around the device. Some
systems use a rotating mirror and/or a rotating holographic diffuser (e.g., the
light-field 3D display developed by USC [
14
], or Holo Table developed by Holy
Fig. 4.5 Super Multi-View
display system based on
front projection
