SiriL Image Processing.

Being completely new to this Astro part of my photographic hobby, is there somewhere where I can find out exactly what all the “Image Processing” options actually do to an image, in plain English please?
So far I am using:
Colour Calibration
Remove Green Noise
Histogram Transformation (don’t really understand this)
Asinh Transformation (don’t really understand this either)
Background Extraction
Colour Saturation

But they’re only six of the 18 available?