Question about gimp scaling algorithms

[Ben321]

I notice that there are 2 new scaling algorithms. These are LoHalo and NoHalo. How exactly do these work? I've found nothing on the internet about them (for example academic papers on image scaling algorithms), so I assume that they are exclusive to the Gimp software, have been invented directly by Gimp's developers. So I'm hoping somebody on these forums can explain exactly what calculations it performs. For example, are they based on the Cubic algorithm? Or maybe based on a Sinc function? Or are they based on some kind of AI, that "sees" the image in the same way the human brain sees it, and so actually attempts to make a reasonable effort to scale the image based on what would look the most natural to the human brain?