getAutoIntersectionForRoughnessAgainstLengthscale
get the intersection between tangente and plateau
getAutoIntersectionForRoughnessAgainstLengthscale(
AFMImageAnalyser,
second_slope = FALSE
)
an AFMImageAnalyser
to get Roughness against lenghtscale calculation
a boolean to manage first or second slope in the roughness against lenghtscale curve