<s>
Foveated	O
image	B-Algorithm
with	O
fixation	O
point	O
at	O
Stephen	O
F	O
.	O
Austin	O
statue	O
.	O
</s>
<s>
Foveated	B-Algorithm
imaging	I-Algorithm
is	O
a	O
digital	B-Algorithm
image	I-Algorithm
processing	I-Algorithm
technique	O
in	O
which	O
the	O
image	B-Algorithm
resolution	I-Algorithm
,	O
or	O
amount	O
of	O
detail	O
,	O
varies	O
across	O
the	O
image	B-Algorithm
according	O
to	O
one	O
or	O
more	O
"	O
fixation	O
points	O
"	O
.	O
</s>
<s>
A	O
fixation	O
point	O
indicates	O
the	O
highest	O
resolution	O
region	O
of	O
the	O
image	B-Algorithm
and	O
corresponds	O
to	O
the	O
center	O
of	O
the	O
eye	O
's	O
retina	O
,	O
the	O
fovea	O
.	O
</s>
<s>
For	O
example	O
,	O
when	O
viewing	O
an	O
image	B-Algorithm
on	O
a	O
computer	B-Device
monitor	I-Device
,	O
one	O
may	O
specify	O
a	O
fixation	O
using	O
a	O
pointing	B-Device
device	I-Device
,	O
like	O
a	O
computer	O
mouse	O
.	O
</s>
<s>
Eye	B-General_Concept
trackers	I-General_Concept
which	O
precisely	O
measure	O
the	O
eye	O
's	O
position	O
and	O
movement	O
are	O
also	O
commonly	O
used	O
to	O
determine	O
fixation	O
points	O
in	O
perception	O
experiments	O
.	O
</s>
<s>
When	O
the	O
display	O
is	O
manipulated	O
with	O
the	O
use	O
of	O
an	O
eye	B-General_Concept
tracker	I-General_Concept
,	O
this	O
is	O
known	O
as	O
a	O
gaze	O
contingent	O
display	O
.	O
</s>
<s>
Some	O
common	O
applications	O
of	O
foveated	B-Algorithm
imaging	I-Algorithm
include	O
imaging	O
sensor	O
hardware	O
and	O
image	B-General_Concept
compression	I-General_Concept
.	O
</s>
<s>
Foveated	B-Algorithm
imaging	I-Algorithm
is	O
also	O
commonly	O
referred	O
to	O
as	O
space	B-Algorithm
variant	I-Algorithm
imaging	I-Algorithm
or	O
gaze	O
contingent	O
imaging	O
.	O
</s>
<s>
In	O
lossy	B-General_Concept
image	I-General_Concept
compression	I-General_Concept
,	O
one	O
may	O
take	O
advantage	O
of	O
this	O
fact	O
in	O
order	O
to	O
compactly	O
encode	O
images	O
.	O
</s>
<s>
If	O
one	O
knows	O
the	O
viewer	O
's	O
approximate	O
point	O
of	O
gaze	O
,	O
one	O
may	O
reduce	O
the	O
amount	O
of	O
information	O
contained	O
in	O
the	O
image	B-Algorithm
as	O
the	O
distance	O
from	O
the	O
point	O
of	O
gaze	O
increases	O
.	O
</s>
<s>
Also	O
,	O
foveation	O
encoding	O
may	O
be	O
applied	O
to	O
the	O
image	B-Algorithm
before	O
other	O
types	O
of	O
image	B-General_Concept
compression	I-General_Concept
are	O
applied	O
and	O
therefore	O
can	O
result	O
in	O
a	O
multiplicative	O
reduction	O
.	O
</s>
<s>
Foveated	O
sensors	O
are	O
multiresolution	O
hardware	O
devices	O
that	O
allow	O
image	B-Algorithm
data	O
to	O
be	O
collected	O
with	O
higher	O
resolution	O
concentrated	O
at	O
a	O
fixation	O
point	O
.	O
</s>
<s>
An	O
advantage	O
to	O
using	O
foveated	O
sensor	O
hardware	O
is	O
that	O
the	O
image	B-Algorithm
collection	O
and	O
encoding	O
can	O
occur	O
much	O
faster	O
than	O
in	O
a	O
system	O
that	O
post-processes	O
a	O
high	B-Algorithm
resolution	I-Algorithm
image	B-Algorithm
in	O
software	O
.	O
</s>
<s>
Foveated	B-Algorithm
imaging	I-Algorithm
has	O
been	O
used	O
to	O
simulate	O
visual	O
fields	O
with	O
arbitrary	O
spatial	O
resolution	O
.	O
</s>
<s>
Foveated	B-Algorithm
rendering	I-Algorithm
is	O
an	O
upcoming	O
video	O
game	O
technique	O
which	O
uses	O
an	O
eye	B-General_Concept
tracker	I-General_Concept
integrated	O
with	O
a	O
virtual	B-Device
reality	I-Device
headset	I-Device
to	O
reduce	O
the	O
rendering	O
workload	O
by	O
greatly	O
reducing	O
the	O
image	B-Algorithm
quality	O
in	O
the	O
peripheral	O
vision	O
(	O
outside	O
of	O
the	O
zone	O
gazed	O
by	O
the	O
fovea	O
)	O
.	O
</s>
<s>
At	O
the	O
CES	O
2016	O
,	O
SensoMotoric	O
Instruments	O
(	O
SMI	O
)	O
demoed	O
a	O
new	O
250Hz	O
eye	B-General_Concept
tracking	I-General_Concept
system	O
and	O
a	O
working	O
foveated	B-Algorithm
rendering	I-Algorithm
solution	O
.	O
</s>
<s>
Foveated	B-Algorithm
imaging	I-Algorithm
may	O
be	O
useful	O
in	O
providing	O
a	O
subjective	O
image	B-Algorithm
quality	O
measure	O
.	O
</s>
<s>
Traditional	O
image	B-Algorithm
quality	O
measures	O
,	O
such	O
as	O
peak	O
signal-to-noise	O
ratio	O
,	O
are	O
typically	O
performed	O
on	O
fixed	O
resolution	O
images	O
and	O
do	O
not	O
take	O
into	O
account	O
some	O
aspects	O
of	O
the	O
human	O
visual	O
system	O
,	O
like	O
the	O
change	O
in	O
spatial	O
resolution	O
across	O
the	O
retina	O
.	O
</s>
<s>
A	O
foveated	O
quality	O
index	O
may	O
therefore	O
more	O
accurately	O
determine	O
image	B-Algorithm
quality	O
as	O
perceived	O
by	O
humans	O
.	O
</s>
<s>
In	O
databases	O
that	O
contain	O
very	O
high	B-Algorithm
resolution	I-Algorithm
images	O
,	O
such	O
as	O
a	O
satellite	O
image	B-Algorithm
database	O
,	O
it	O
may	O
be	O
desirable	O
to	O
interactively	O
retrieve	O
images	O
in	O
order	O
to	O
reduce	O
retrieval	O
time	O
.	O
</s>
<s>
Foveated	B-Algorithm
imaging	I-Algorithm
allows	O
one	O
to	O
scan	O
low	B-Algorithm
resolution	I-Algorithm
images	O
and	O
retrieve	O
only	O
high	B-Algorithm
resolution	I-Algorithm
portions	O
as	O
they	O
are	O
needed	O
.	O
</s>
