Baumer TXG - 4.5 Pixel Correction; 4.5.1 General information

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4.4.2 Gain
In industrial environments motion blur is unacceptable. Due to this fact exposure times
are limited. However, this causes low output signals from the camera and results in dark
images. To solve this issue, the signals can be amplied by a user-dened gain factor
within the camera. This gain factor is adjustable from 1 to 10.
Notice
Increasing the gain factor causes an increase of image noise.
PixelCorrection4.5
Generalinformation4.5.1
A certain probability for abnormal pixels - the so-called defect pixels - applies to the sen-
sors of all manufacturers. The charge quantity on these pixels is not linear-dependent on
the exposure time.
The occurrence of these defect pixels is unavoidable and intrinsic to the manufacturing
and aging process of the sensors.
The operation of the camera is not affected by these pixels. They only appear as brighter
(warm pixel) or darker (cold pixel) spot in the recorded image.
Warm Pixel
Cold Pixel
Charge quantity
„Normal Pixel“
Charge quantity
„Cold Pixel“
Charge quantity
„Warm Pixel“
Figure45►
Distinction of "hot" and
"cold" pixels within the
recorded image.
Figure46►v
Charge quantity of "hot"
and "cold" pixels com-
pared with "normal"
pixels.