OpenCV - What do the different line options mean?

I have looked all the websites and documentation of OpenCV to understand the image line options (see below), but it seems that there is nowhere about it. Several users have already asked questions about these parameters, but I was unable to find the correct answer.

Parameters:

setRegistrationResol( );
setSeamEstimationResol( );
setCompositingResol( );
setPanoConfidenceThresh( );

      

        
        
        
      

    

Can anyone provide a correct explanation for these parameters and how to find the appropriate values.

Thank.