Pike
Technical
Manual
V5.2.3
198
Controlling image capture
Controlling
image
capture
SIS: Definition
Secure
image
signature
(SIS)
is
the
synonym
for
data,
which
is
inserted
into
an
image
to
improve
or
check
image
integrity.
With
the
new
firmware
3.×,
all
Pike
models
can
insert
•
Time
stamp
(IEEE1394
bus
cycle
time
at
the
beginning
of
integration)
•
Trigger
counter
(external
trigger
seen
only)
•
Frame
counter
(frames
read
out
of
the
sensor)
•
AOI
(×,
y,
width,
height)
•
Exposure
(shutter)
and
gain
•
Input
and
output
state
on
exposure
start
•
Index
of
sequence
mode
•
Serial
number
•
User
value
into
a
selectable
line
position
within
the
image.
Furthermore
the
trigger
counter
and
the
frame
counter
are
available
as
advanced
registers
to
be
read
out
directly.
SIS: Scenarios
The
following
scenarios
benefit
from
this
feature:
•
Assuming
camera
runs
in
continuous
mode,
the
check
of
monotonically
changing
bus
cycle
time
is
a
simple
test
that
no
image
was
skipped
or
lost
in
the
camera
or
subsequently
in
the
image
processing
chain.
•
In
(synchronized)
multi
camera
applications,
the
time
stamp
can
be
used
to
identify
those
images,
shot
at
the
same
moment
in
time.
•
The
cross-check
of
the
frame
counter
of
the
camera
against
the
frame
counter
of
the
host
system
also
identifies
any
skipped
or
lost
images
during
transmission.
•
The
cross-check
of
the
trigger
counter
against
the
frame
counter
in
the
camera
can
identify
a
trigger
overrun
in
the
camera.
•
AOI
can
be
inserted
in
the
image
if
it
was
set
as
a
variable
e.g.
in
a
sequence.
•
Exposure/gain
scenario
parameters
can
be
inserted
in
the
image
if
set
as
a
variable
in
e.g.
sequence
mode
to
identify
the
imaging
conditions.
•
Inserting
input
and
output
state
on
exposure
start
can
be
helpful
when
working
with
input
and
output
signals.
•
Index
of
sequence
mode
can
be
inserted
if
SIS
is
used
together
with
sequence
mode.
•
Serial
number
inserted
in
the
image
helps
to
document/identify
the
camera
in
e.g.
multi
camera
applications.
