English to French Tech/Engineering Physics Optics

Hi everyone,

I am still translating this image correction control software manual and this time I have a problem with "three-point correction".

Here is the whole paragraph: "For example a three point correction would typically use a mid grey correction image, obtained by either halving the X-ray dose used to obtain the white reference, or halving the acquisition time."

I obviously thought of "correction à trois points", which does not seem to be very popular on Google.. Can't find any translation of this term.. Any idea?

Thanks in advance!