Standard Features AW00089317000
262 Basler ace GigE
Binning’s Effect on AOI Settings
When you have set the camera to use binning, the maximum area of interest (AOI) will be made up
of the binned lines and columns, i.e. it is going to be smaller than the actual sensor’s maximum AOI.
You can think of this as a "virtual sensor". Also, any offsets refer to the virtual sensor’s position.
For example, assume that you are using an acA640-120gm camera set for 3 by 3 binning as
described above. In this case, the maximum AOI would be 219 columns by 164 lines. The AOI width
and height parameters are adjusted automatically to reflect this. Likewise, any offsets you have
defined before enabling binning will be adjusted automatically.
When you disable binning, the AOI will increase again but may be smaller than the AOI you had set
originally. This happens when the original AOI values can’t be evenly divided by the binning factor,
leaving a remainder of lines and columns, which is then ignored when the AOI is increased again.
Therefore, Basler recommends to always check the AOI and offset settings after disabling binning
and, if necessary, to manually set the AOI to the desired values.
For more information about the area of interest (AOI) feature, see Section 10.5 on page 216.
Possible Image Distortion
Objects will only appear undistorted in the image, if the numbers of binned lines and columns are
equal. With all other combinations, the imaged objects will appear distorted. If, for example, vertical
binning by 2 is combined with horizontal binning by 4 the widths of the imaged objects will appear
shrunk by a factor of 2 compared to the heights.
If you want to preserve the aspect ratios of imaged objects when using binning, you must use
vertical and horizontal binning where equal numbers of lines and columns are binned, e.g. vertical
binning by 3 combined with horizontal binning by 3.
Binning’s Effect on Decimation
If vertical binning is used, vertical decimation (see below) is automatically disabled, and vice versa,
i.e. if vertical decimation is used, vertical binning is disabled.
Horizontal binning works independently of the decimation vertical feature.
Binning’s Effect on Stacked Zone Imaging (acA2000-50, acA2040-25 Only)
Using binning effectively reduces the resolution of the camera’s imaging sensor.
As a consequence, if binning is enabled, the positions and the sizes of the set stacked zones are
automatically adapted to the applied binning factors as follows: The stacked zone imaging
parameter values are divided by the corresponding binning factors (vertical and/or horizontal
binning factor).
If the stacked zone imaging parameter values are not evenly divisible by the corresponding binning
factor, the parameter values are automatically rounded down to the nearest whole number.
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