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multiple transfert with duplex and discard blank page

Forums › TWAIN Classic › multiple transfert with duplex and discard blank page

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  • March 27, 2019 at 9:49 am #50888 Reply
    Giloser
    • Topics - 102
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    • Total Posts - 299

    Hi,

    I made work my c# WPF application for some times now but I still have some trouble.
    I would like to scan faster so I tried to scan all the files at once => that worked and I get all my files

    But if I had the duplex and the discard of blank page capabilities my pages finished all mixed up
    I have some page alone that should not be and some other that are put together in the tiff but are from 2 separate file.

    can some of you help figure that out?

    thanks

    April 3, 2019 at 12:13 pm #50892 Reply
    markm
    • Topics - 102
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    • Total Posts - 299

    I recommend looking at DAT_EXTIMAGEINFO which provides metadata on the images being transferred, including sheet counts and tags indicating which side of a sheet of paper an image comes from. This can be used to determine when blank images have been discarded.

    April 10, 2019 at 2:35 am #50894 Reply
    Giloser
    • Topics - 102
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    • Total Posts - 299

    thanks you very much!

    unfortunately I have try to get that info but I cannot get the info and make it works.
    Should I get it by the DsRaw with an IntPtr? or there is another way?

    thanks again!

    April 10, 2019 at 10:59 am #50896 Reply
    markm
    • Topics - 102
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    • Total Posts - 299

    The open source TWAIN CS project has an example where it gets the documentcount and the pageside using DatExtImageInfo. You can find the repository here: https://github.com/twain/twain-cs

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