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Back or front side in Duplex scanning

Posted: Tue Sep 27, 2016 12:10 pm
by TurboK
Hi,

My feature request regards a way to determine if an image is the back or the front side when using TwainAcquireToGdPictureImage() to scan documents when duplex mode is enabled .
I can't rely on the odd/even counter of images because certain scanner can detect and eliminate blank pages directly upon acquisition; in this scenario if I scan 2 pages with the back side blank, ill' get two "front" images whereas relying on odd/even i would get 1 front and 1 back.

Is there any plan about it?
Eventually can I have 'preview' versions ? I am a licensed user.

Thank you!
Nicola

Re: Back or front side in Duplex scanning

Posted: Wed Sep 28, 2016 5:59 pm
by Loïc
Hello,

Unfortunately, unless I am missing something, there is nothing in the TWAIN specification to obtain such information. SO the only thing i can suggest is to disable the blank page detection of the device and use the one of GdPicture.

Please let me know if you need further information.

With best regards,

Loïc

Re: Back or front side in Duplex scanning

Posted: Thu Sep 29, 2016 1:55 pm
by Loïc
Update: this is actually possible. The next minor release will include a new method: TwainGetLastPageSide()