Explanation for stitching parameters needed

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Hello,

I searched over all the websites and OpenCV documentation to understand the Image stitching parameters (cf below), but it seems that there is no explanation about those anywhere ! Multiple users already asked questions about those parameters, but I didn't manage to find a proper answer.

The parameters are :

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

Could someone please provide a proper explanation about those parameters and how to find the suited values.

Thank you.