Allied Vision Technologies MF-145B2 Manuel d'instructions télécharger pdf (Page 89)

Marlin Technical ManualV.2.7.0

Description of the data path

Binning (only Marlin CCD b/w models)

2 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; thus, the amount of data while retain-

ing the original image area angle

• An increase in the frame rate (vertical binning only)

• A brighter image, resulting in an improvement in the signal-to-noise ratio

of the image (depending on the acquisition conditions)

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 wanted signal intensity

expected.

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 the following types of binning

(H=horizontal, V=vertical):

• 2 x H-binning

• 2 x V-binning

and the full binning modes:

• 2 x full binning (a combination of 2 x H-binning and 2 x V-binning)

Note



Only Marlin CCD equipped b/w cameras have this feature.

Note



Changing binning modes involve the generation of new shad-

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

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 236 237

Pas de commentaire

Allied Vision Technologies MF-145B2 Manuel d'instructions Page 89