Photon Focus MV4 Series User Manual page 142

C Use Cases
7. Illuminate the camera homogeneously to produce a gray image with an Average_Value (in
category Photonfocus) between 2400 and 3200 DN, if PreGain is correctly set, see also
Section 12.3 and Section 12.2.3. Increase or decrease illumination if Average_Value is
outside this range. The property Average_Value can be updated by clicking on the property
Average_Update (in category Photonfocus).
8. Click on Correction_SetGreyRef (in category Photonfocus/Calibration). Wait until the
command has been finished.
9. Enable Correction_AutoThreshold or set the correction thresholds manually (see Section
12.2.4).
10. Let the camera calculate the calibration values by sending the command
Correction_Calculate. The new calibration values are now active in the camera.
11. It is recommended to test the calibration values by examining images grabbed with the
FPN correction enabled (e.g. setting Correction_Mode to OffsetGainHotpixel).
12. The reference images and the calibration values are now stored in the camera's volatile
memory (RAM). The new calibration is lost if the camera power is switched off. To store
the calibration values permanently, send the command Correction_SaveToFlash. Note, that
this overwrites the factory presets. Note, that the reference images are not stored
permanently.
There are two independent calibration sets that are activated by the setting
of Sensor_PixelFormat (Mono10 / Mono12). All operations regarding the image cor-
rection calibration affect only the calibration set of the current setting of Sen-
sor_PixelFormat. This also applies to the command Correction_SaveToFlash which
only stores (overwrites in flash memory) the calibration data for the current set-
ting of Sensor_PixelFormat. Example: if Sensor_PixelFormat is set to Mono10 and
the image correction is calibrated as described above, then the calibration of the
Mono12 setting is not modified. To calibrate the camera also for Mono12, set Sen-
sor_PixelFormat to Mono12 and do the calibration again.
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