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Kendor
Asked: 2012-01-10 11:37:49 +0800 CST

Is there a way to adjust contrast for Simple Scan?

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Simple Scan works very well for basic day to day scanning; however, my scans are a bit washed out. Am wondering if there's way to adjust the contrast?

scanner

3 Answers

  1. Simple Scan is - by its name - simple.

    There is this outstanding bug-report with a proposed pull-request.

    However the main dev said:

    I'm a little worried about how consistent drivers are with these settings, but I support the patch if it works. This setting will be "advanced" as most users will adjust the brightness/contrast after the scan is completed.

    An alternative to Simple Scan is xsane from the software-center.

    At first glance, it appears to be much more complex - however, its worth spending a small amount of time - it has great control over all aspects of scanning including contrast settings as shown.

    enter image description here

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  2. Best Answer

    Simple Scan 3.8 has available in Saucy Salamander, introducing various refinements and long-awaited features.

    Navigating now to Simple Scan-->Document-->Preferences, summons the Preferences dialog containing the newly-implemented Brightness and Contrast additions.

    Simple Scan 3.8 settings for adjusting values for Brightness and Contrast

    Moreover, adjusting values for Brightness and Contrast is to be hassle-free performed via a draggable pointer, useful to increase and decrease the values per-user's likeness.

    Source Link

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  3. Options I've found:

    • Use xsane instead of simple-scan :-(

    Xsane lets you adjust the gamma, brightness, contrast during the initial scan.

    • Color calibrate your scanner

    If you want to do it 'right' and, don't mind falling into time sinks, you want to import a 'color profile' for your scanner. For that you need an .icm or .icc type file which is some processed output from a scan of a perfectly printed 'color target'. In gnome 19.04 you'll find it under 'settings -> devices -> colour'. Good luck finding one of those things to put through your scanner.

    • Post-process your scans

    imageMagick's convert program is very easy to use and will adjust various settings. There is a fair bit of trial-error to get the right result. eg:

    convert -contrast input.pdf output.pdf
convert -auto-gamma input.pnm output.pnm
convert -brightness-contrst -25 input.jpg output.jpg
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