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Description of the data path

PIKE Technical Manual V4.0.0

135

Binning (only PIKE b/w models)

2 x / 4 x / 8 x binning

Definition Binning is the process of combining neighboring pixels while being read out

from the CCD chip.

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)

• a brighter image, also resulting in an improvement in the signal-to-

noise ratio of the image

Signal-to-noise ratio (SNR) and signal-to-noise separation specify the

quality of a signal with regard to its reproduction of intensities. The value

signifies how high the ratio of noise is in regard to the maximum achievable

signal intensity.

The higher this value, the better the signal quality. The unit of measurement

used is generally known as the decibel (dB), a logarithmic power level. 6 dB

is the signal level at approximately a factor of 2.

However, the advantages of increasing signal quality are accompanied by a

reduction in resolution.

Only Format_7 Binning is possible only in video Format_7. The type of binning used

depends on the video mode.

Types In general, we distinguish between six types of binning (H=horizontal,

V=vertical):

• 2 x H-binning

• 2 x V-binning

• 4 x H-binning

• 4 x V-binning

• 8 x H-binning

• 8 x V-binning

Note

•Only PIKE b/w cameras have this feature.

• Binning does not change offset, brightness or black-

level.

Note

Changing binning modes involves the generation of new

shading reference images due to a change in the image size.

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Allied Vision Technologies Pike Bedienerhandbuch Seite 135