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Undistort nodes parameters

Hello vvveople ¡¡

I have used the undistort nodes a few times but i never actully new hot to calculate determine the values from the Focal LengthXY pin or and the Principal Point pin , could anyone explain me how to get this values by knowing my camera lens specs please ?

the undistort nodes use the openCV undistort methods, so have a look into the openCV documentation or look in the web for more info…

OK thanks , i,ll search for it then , cu .