Mikrotron EOSENS GE CAMERA Spezifikationen PDF herunterladen (Seite 21)

Configuration EoSens GE Camera Manual

6.5.3 FPN correction, command: FPNEnable

Command: FPNEnable

Description: With this command the column FPN (fixed pattern noise) correction can

be activated or deactivated. At the beginning of each frame, before visible

lines are read out, a fixed voltage is applied at the columns. These values

are read out like real data and are stored inside the camera. When FPN

correction is enabled the stored value is subtracted of each pixel. The ad-

vantage is a more homogeneous picture but with a limited dynamic.

Note: This noise is not dynamic but fixed (as the name says). That’s a typical

effect of a CMOS sensor. But the fixed pattern makes it easy to eliminate

this noise completely. The camera does only a column correction. If an

accurate pixel correction of the full frame is required this must be done in

the imaging software. To do this it’s best to switch off the camera’s FPN

correction to get the original dynamic. Then a complete image of a uniform

area must be stored as a reference. This values must be subtracted for

each pixel of the frame and the noise will disappear.

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Mikrotron EOSENS GE CAMERA Spezifikationen Seite 21