HP 4100C: Blank areas show up black in saved image file

Discussion in 'Scanners' started by John, Nov 2, 2005.

  1. John

    John Guest

    I have an HP Scanjet 4100C on a system running Windows XP Pro. Most of
    the time it works fine. But occasionally, when I scan a drawing or text
    document which has lots of blank spaces there is a problem when the scan
    is saved. The scanned image looks normal in the scanning software
    window, but when I save the scan as a .jpg file and then view the file,
    most of the areas that should be all white (because they are blank) show
    up black. This is difficult to describe. Put another way, it looks as
    though I cut out all the areas of the document that have any image and
    pasted them on a black sheet of paper. I find nothing about this on HP's
    site, and since it doesn't always happen it is difficult to
    troubleshoot. Any suggestions on a fix? Thanks!

    John, Nov 2, 2005
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  2. John

    John Guest

    Problem solved! I'm using HP Precision Scan LT, which came with the
    scanner. I finally found the section in the help file where it says that
    if the image is saved in the text mode (which is the default unless it
    detects color or a photo) it saves in a format optimized for OCR. If I
    manually change the mode after each scan to "black and white drawing",
    the problem disappears.

    Thanks for your reply and suggestions.

    John, Nov 6, 2005
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