Instruction manual

Description of the data path
8.12 Binning (CCD b/w models)
Binning is the process of combining neighboring pixels while being read out from the CCD chip.
All CCD equipped b/w Marlin models have this feature.
Binning is used primarily for 3 reasons:
 A reduction in the number of pixels and thus the amount of data while retaining the original
image area angle,
an increase in the frame rate (vertical binning only),
l to noise ratio of the image.
ignal to noise ratio (SNR) and signal to noise separation specify the quality of a signal with
lue signifies how high the ratio of noise is in
gard to the maximum wanted signal intensity expected.
kno level. 6 dB is the signal level at approximately a
ctor of 2.
However, the advantages of increasing signal quality are accompanied by a reduction in
.
Changing binning modes involve the generation of new shading reference images due to a
change in the image size.
In general a difference is made between two types of binning, that can also be combined:
8.12.1 Vertical binning
Vertical binning increases the light sensitivity of the camera by a factor of two by adding
together the values of two adjoining vertical pixels output as a single pixel. At the same time
this normally improves signal to noise separation by about 2 dB.

 an improvement in the signa
S
regard to its reproduction of
intensities. The va
re
The higher this value, the better the signal quality. The unit of measurement used is generally
wn as the decibel (dB), a logarithmic power
fa
resolution
Binning is possible only in video Format_7. The type of binning used depends on the video mode.

Figure 46: Vertical binning
MARLIN Technical Manua
l
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