Duplex Images

Questions, comments and suggestions concerning VintaSoft Twain .NET SDK.

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malovern
Posts: 4
Joined: Tue Aug 06, 2013 6:14 pm

Duplex Images

Post by malovern » Thu Jul 10, 2014 6:13 pm

Hi,

I am trying to capture duplex images from an ADF canon scanner but I cannot seem to find a way to determine if an image sent in the ImageAcquired event is a duplex image. It looks like it raises the event twice (once for each side of the scanned form) but on an ADF scanner, there could be multiple forms being scanned so I do not know which image is part of a duplex scan or not if this makes sense. The only way I can think of is for every two images, save it to a file but is there another way to detect if the incoming images are from a duplex scan or not?

Thanks

Jim

Alex
Site Admin
Posts: 1462
Joined: Thu Jul 10, 2008 2:21 pm

Re: Duplex Images

Post by Alex » Thu Jul 10, 2014 7:36 pm

Hi Jim,

Yes, TWAIN specification allows to determine page side but not all devices (drivers) support this. For getting information about page side you need get an extended image information with identifier ExtendedImageInfoId.PageSide from the device. Please run our TWAIN Extended Image Info Demo and check if your device supports an extended image information.

Best regards, Alexander

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