Vignetting function used in Metashape

[Deepvision]

Hey guys,

Maybe this is asking for too much information, but my supervisor asked me if I could find out which vignetting function is used by Metashape to perform vignetting correction of images. We would like to know this so that we can manually perform vingetting correction using the vignetting coefficients which Metashape produces from the calibrateColors function in the Python API.

Many thanks!