30
8.1.9 Brightness Correction (Binning Correction)
The aggregation of charge carriers may cause an overload. To prevent this, binning cor
-
rection was introduced. Here, three binning modes need to be considered separately:
Binninig Realization
1x2
1x2 binning is performed within the sensor, binning correction also takes
place here. A possible overload is prevented by halving the
exposure time.
2x1
2x1 binning takes place within the FPGA of the camera. The binning cor-
rection is realized by aggregating the charge quantities, and then halving
this sum.
2x2
2x2 binning is a combination of the above versions.
Charge quantity
Binning 2x2
Super pixel
Total charge
quantity of the
4 aggregated
pixels
8.2 Color Adjustment – White Balance
This feature is available on all color cameras of the Baumer SXG series and takes
place within the
Bayer processor.
White balance means independent adjustment of the three color channels, red,
green and blue by employing of a correction factor for each channel.
User-specific
8.2.1
Color Adjustment
The user-specific color adjustment in Baumer color cameras facilitates adjustment of the
correction factors for each color gain. This way, the user is able to adjust the amplifica
-
tion of each color channel exactly to his needs. The correction factors for the color gains
range from 1 to 4.
non-adjusted
histogramm
histogramm after
user-specific
color adjustment
One Push
8.2.2
White Balance
Here, the three color spectrums are balanced to a single white point. The correction fac-
tors of the color gains are determined by the camera (one time).
non-adjusted
histogramm
histogramm after
„one push“ white
balance
Figure 30 ►
Aggregation of charge
carriers from four pixels
in bidirectional binning.
Figure 31 ►
Examples of histo-
gramms for a non-
adjusted image and for
an image after user-
specific white balance..
Figure 32 ►
Examples of histo-
gramms for a non-ad-
justed image and for an
image after "one push"
white balance.
