Advanced parameters and commands
Pearleye Technical Manual
V2.2.0
52
Background correction (U, M)
The module
background correction
is closely related to the module
integrator
/ image store
at the beginning of the processing chain (
H
). It also compre-
hends an image integration function. But additionally it can subtract its current
correction data image (
H
/
U
) from the incoming image and add the offset
M
.
Thus a fixed pattern noise reduction or difference image calculation is possible.
The bits of the parameter value are divided into three different sized bit groups
a
,
b
and
c
. Each bit group has a special function, being independent of the other
ones:
•
a
: Controls the output of background correction module. Beside the nor-
mal background correction mode also the actual memory content (
H
/
U
) of
the integrator can be output. In this case the correction module becomes
an image source itself. It provides a simple image store function.
•
b
: Defines the number of images to be integrated and starts the integra-
tion process as soon as a new value was set.
•
c
: Indicates whether the at last started integration is still running. This
bit can only be read out; during write access to
U
it is ignored.
The table below illustrates the possible values for the individual bit groups:
Note
This module uses the same memory buffer as the
integrator
and image store
(
H
). It is not useful to activate U and H at the
same time.
Note
This bit group is split into two separate areas.
