Linea HS 32k CMOS TDI Cameras
Camera Performance and Features
35
Saving & Loading a PRNU Set Only
See the section Flat Field Category in Appendix A for GenICam features associated with this section
and how to use them.
flatfieldCorrectionCurrentActiveSet
A user set includes all the “settings” (for example, gain, line rate), FPN and PRNU coefficients, and
a LUT. These three features let you save/load just the PRNU coefficients. Loading a complete user
set takes approximately 1 second while loading only the user PRNU coefficients takes less than 200
milliseconds
Use the User PRNU Set Selector parameter to select the set you want to save or load. 17 sets are
available—16 user and 1 factory.
The Factory Set is read-only and contains all ones. Loading the Factory Set is a good way to clear
the user PRNU.
Save the current user PRNU coefficients using the “Save User PRNU Set” command. Load the user
PRNU coefficients from the set specified using the “User PRNU Set Selector” and the “Load User
PRNU Set” command features.
Setting Custom Flat Field Coefficients
Flat Field (PRNU) coefficients can be custom modified and uploaded to the camera. They can also
be downloaded from the camera.
To upload or download coefficients, use File Access Control Category > Upload / Download File >
Settings and then select Miscellaneous > Current PRNU to download / upload a file.
The PRNU coefficients are used by the camera as soon as they are uploaded. To avoid loss at
power up or while changing row settings, the uploaded coefficients should be saved to one of the
available user sets.
