Check out the SANE project at http://www.sane-project.org. It has backends for many different platforms and a whole lot of frontend utilities too. I'm not sure if they have a Perl interface, but they have command-line utilities, and you can sure use Perl to drive those!

FYI, using TWAIN is like shooting at a moving target. Yeah, there's a standard, but it's reasonably loose, and not all TWAIN drivers have all the features you'd like them to have. I'm fighting with my own battles with TWAIN in another development environment. . .

Good luck!
MrCromeDome

In reply to Re: Control flatbed scanner by MrCromeDome
in thread Control flatbed scanner by zzspectrez

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