45
8.1.7 Brightness Correction
The aggregation of charge carriers may cause an overload. To prevent this, brightness
correction was introduced. Brightness correction can be swiched on or off.
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
◄ Figure 27
Aggregation of charge
carriers from four pixels
in bidirectional binning.
