__/ [bugbear] on Thursday 02 February 2006 12:50 \__
> Anton81 wrote:
>> Hi,
>>
>> I don't know much about image processing or Gimp, but I'd like to enhance
>> scans in some way.
>>
>> Can someone give me advice for Gimp or references how to do:
>>
>> - remove speckles
>
> Filters->Enhance->Despeckle
>
>> - remove below a threshold (i.e. remove opposite page shining through)
>
> Layer->Colours->Levels
>
>> - "discretize" gray scales (i.e. make all sort of black text really black)
>
> Layer->Colours->Levels
>
>> - adjust faulty scanner colour sensitivity
>
> Well, all that kind of thing is really under the moster heading
> of:
>
> Layer->Colours->Curves.
>
> But using it is hard to do well.
>
> http://gimp-savvy.com/BOOK/index.html
>
> Try chapter 6
>
> BugBear
This can probably be wrapped up as a Script-Fu (or Python). I would be
interested in knowing if this can be made scriptable from the command-line
too. I have plenty of photo albums scanned and I could use some automated
refinement of these. Choice of colours (via curves), levels and the like
make this approach entail a manual labour requirement, so I hope choices can
be made independently, which prevent this from being semi-automatic.
I tend to prefer ImageMagick at times as, while it is not as flexible, it can
handle batch-processing rather well.
Roy
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