ALLIED Vision Technologies Pearleye P-030 LWIR - Manual (Page 51)

Advanced parameters and commands
Pearleye Technical Manual V2.3.0
51
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 and is independent of the other
two bit groups:
• 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 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

The bit group a is split into two separate areas. These areas are
located on both sides of bit group b.