This may be a good place to mention a text I began writing some while ago:
On Scanning.
http://everist.org/temp/__On_scanning.htm
Meant to be a 'how to' about scanning and post-processing techniques, written as
I
explored that myself. It's not finished because I was working on a solution to the
'screened images with overlaid sharp text' post-processing problem, when
sidetracked.
As often happens with me. Also that project diverged into the whole text encoding
thing. Which I can't discuss, but I *can* discuss scanning issues.
Anyway, any comments, corrections and suggestions for extra material are welcome.
Oh, and those with an interest in Apple history may find this amusing:
http://everist.org/NobLog/20181001_missing_wave.htm
Guy