Linearizing PDF scans

[J. David Bryan]

On Saturday, August 14, 2021 at 11:04, Al Kossow via cctech wrote:

> Jay Jager is trying to deal with scanning manuals with colored text
> and backgrounds. Is your workflow for dealing with this around
> somewhere? 

I'm still using the same set of programs that I sent to you in April 2016 
(as image-utilities.zip).

Have Jay contact me directly, and I'll see what I can do to help.

Spot color (colored text being a specific case) is the most difficult issue 
to handle, in my experience, especially as the colors are usually screened 
from CMYK.  Solidifying screened colored areas and quantizing into a small 
number of solid colors that can be rendered, e.g., as a four-color PNG page 
in a PDF, is not trivial, especially when text or line drawings touch or 
overlay the screened areas.

                                      -- Dave