10 Advanced Parameters and Commands
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The parameter
M
defines the offset value that is added to every pixel if the background correction is
activated. By default,
M
is automatically set to the mean value of the background image, provided that
the background image acquisition is done with the automatic calibration function (
k
). In this way it is
possible to preserve the constant component of the image irrespective of the background correction’s
activation state. Integrating a new background correction image with the command
U
does
not
modify
M
. Only the 12 (14) high significant bits of this 16 bits value are relevant. The following table reveals
the bit order:
Bit
position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
-
-
-
-
Value
(12bit)
a 0
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
-
-
Value
(14bit)
a 0
Example:
Set the background correction offset to 291 = 0x123
>
M=1230[CR]
10.3
Bad Pixel Correction (
C
,
F
)
The configuration of the bad pixel correction is executed ex factory, like this normally no access on
behalf of the user becomes necessary.
The bad pixel correction applies up to six non false neighbour pixels, in order to determine an
interpolated value from the neighbour ship. At the position of the defective pixel an interpolated value
in exchange of the bad pixel value is output.
The parameter
F
controls the operation mode of the bad pixel correction. The following value
assignment is applied:
0
Bad pixel correction deactivated; output of the uncorrected data.
1
Bad pixel correction is applied.
2
Testing mode, output of correction data.
(*)
(*)
Attention: Operation mode
2
exists for test purposes. In case of activating this mode it
has to taken into consideration that the module does not transmit any incoming image
data anymore. It becomes a data source itself instead.
Example:
Activate the bad pixel correction.
>
F=1[CR]
By means of parameter
C
the file number of the required correction data is indicated. Ex-factory the
defective pixels are determined one time and the corresponding correction data is stored in a special
data format in the camera. As generally only one file with correction data exists in the camera, it is not
necessary to change this parameter.
Example:
Initialization of the correction data for the bad pixel correction from the file 0x70.
>
C=70[CR]
VDS Vosskühler GmbH
IRC-320
