lineart parameters

I’m playing with the lineart (smart coloring) plugin in gimp_gmic and was wondering if the parameters are clearly described somewhere … ?
essentially I don’t understand the difference between “splines” and “segments” in the connection parameters
also I don’t clearly get what the globals “Contour detection%” and “contour erosion” does.
thanks in advance

See PIXLS.US Blog - G'MIC 2.0. Contains an introduction on the filter with several references for further reading. Also see post #15.

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thanks.I will look at that.