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how to get original image data from scanner?

Forums › TWAIN Classic › how to get original image data from scanner?

  • This topic has 5 replies, 2 voices, and was last updated 12 years, 2 months ago by gabe.
Viewing 6 posts - 1 through 6 (of 6 total)
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  • November 6, 2008 at 2:51 am #22426 Reply
    allen491
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    • Topics - 1
    • Replies - 2
    • Total Posts - 3

    now,i want to get original image data from scanner. my scanner type is canon 9550F. I can call TWAIN Driver in my program and capture the image data. but i don’t know to get image data via TWAIN Driver is original image data from scanner ?

    thanks!!!

    notice:
    original image data: without any processing, directly getting data from CCD sensor of scanner.

    November 6, 2008 at 6:03 am #24706 Reply
    gabe
    Participant
    • Topics - 9
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    • Total Posts - 592

    raw is not a fileformat supported by the twain spec, sorry.

    .

    November 6, 2008 at 9:42 am #24707 Reply
    allen491
    Participant
    • Topics - 1
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    • Total Posts - 3

    the data from sensor CCD of scanner, what’s processing? Raw data->RGB?

    thanks!

    November 6, 2008 at 10:31 am #24708 Reply
    gabe
    Participant
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    the driver is responsible for making the data available.

    .

    November 7, 2008 at 2:31 am #24709 Reply
    allen491
    Participant
    • Topics - 1
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    • Total Posts - 3

    i from websit get smothing about raw data for scanner. The vuescan software support raw data output from scanner. i don’t know the vuescan software how to get raw data from scanner? i guess that he used TWAIN Driver for getting data from scanner.
    i want to know which type scanner support raw data output?r How to get raw data from scanner?

    thanks!!!!

    November 7, 2008 at 5:51 am #24710 Reply
    gabe
    Participant
    • Topics - 9
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    • Total Posts - 592

    I dunno, but you won’t get it from the twain specification. Could be that some vendors build a driver with a custom file format (adding raw, pdf, etc.. ), there is a lot of room in the specification for vendors to do custom stuff, or it could be that you got peudo-raw (a bmp converted to raw – which for me is more medium than raw, but whatever). If you know someone that got it done, try contacting them.

    About you wanting to know what vendors support {insert your hearts desire here}, yeah that’d be superExtraFantastic if a list like existed. It doesn’t, sorry. The closest thing to a list like that is a site maintained by Dosadi, where they host their twister archive:
    http://www.dosadi.com/twister-reports.php

    .

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Viewing 6 posts - 1 through 6 (of 6 total)
Reply To: how to get original image data from scanner?
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