"Hans-Georg Michna" <hans-georgNoEmailPleasemichna.com> wrote in message
> Many thanks for the good hints!
> Does anybody here understand how the upscaling algorithms like
> Lanczos interpolation work? Any experiences?
Do a Google search for a message with a description that Dave Martindale
gave in this forum (much clearer than I could explain it) some months (?)
"Lanczos windowed sinc" interpolation is very good in retaining the original
pixel contrast when looked at from an appropriate distance. It can cause
some visible (ringing) artifacts on sharp edges if looked at from too close.
Other interpolation methods (such as ...