Back or front side in Duplex scanning

Feature Requests for GdPicture.NET.
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TurboK
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Joined: Mon Sep 26, 2011 8:52 am

Back or front side in Duplex scanning

Post by TurboK » Tue Sep 27, 2016 12:10 pm

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

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Loïc
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Re: Back or front side in Duplex scanning

Post by Loïc » Wed Sep 28, 2016 5:59 pm

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

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Loïc
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Re: Back or front side in Duplex scanning

Post by Loïc » Thu Sep 29, 2016 1:55 pm

Update: this is actually possible. The next minor release will include a new method: TwainGetLastPageSide()

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