Which free software could acquire 48 bits color depth pictures from a scanner ?

Discussion in 'Scanners' started by Guilbert STABILO, Nov 16, 2008.

  1. Guilbert STABILO

    Steve Guest

    Anyone who does any kind of photo editing that involves interpolation,
    such as resize or rotate by other than cardinal angles, does or should
    care.

    By saying you don't care, either you don't edit your photos, you don't
    understand resampling and why you should care about it (although the
    rest of the post you snipped makes a great case about why anyone who
    cares about their images should care about how they are resampled) or
    you just don't care what your images look like.

    Since it's very important for the rest of the photography world, I'll
    put back what you snipped just in case someone only sees this post and
    didn't see the original:

    You don't even need to do multiple steps of processing to see why
    sinc/lanczos interpolation is better. The following is an example of
    a single stage resize and the difference it can make.

    First, a 100% crop of an area showing why some interpolators might
    have problems. The regular pattern of the corrugations in the side of
    the plane are trouble:

    http://www.flickr.com/photos/sss_random_shots/3055500937/sizes/o/

    Now, a resize to 640x427 by Nikon PicturePerfect. Notice how the
    corrugations cause morrie patterns:

    http://www.flickr.com/photos/sss_random_shots/3056337614/sizes/o/

    And now a resize to 640x426 by XnView using sinc/lanczos interpolator.
    No more morrie patterns from the corrugations. Only typical jpeg
    artifacts that I could have removed by compressing it less:

    http://www.flickr.com/photos/sss_random_shots/3055500557/sizes/o/

    Steve
     
    Steve, Nov 25, 2008
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  2. Guilbert STABILO

    Ray Fischer Guest

    Yes, yes, we all know that you believe yoursef to be far better than
    99.9% of the world's photographers and graphic artists. Your
    obsession with an obscure bit of math really does show you to be a
    competant photographer.

    Now go away.
     
    Ray Fischer, Nov 25, 2008
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  3. Guilbert STABILO

    Ray Fischer Guest

    Because ...?
    Your obsession only reveals you to be a nut.
     
    Ray Fischer, Nov 25, 2008
  4. Guilbert STABILO

    Steve Guest

    Why don't you take a look at the photos and comment yourself on why
    one should care about the type of interpolation used to
    rescale/resize. Here they are again:

    First, a 100% crop of a small area:

    http://www.flickr.com/photos/sss_random_shots/3055500937/sizes/o/

    Next, a single resize by Nikon PicturePerfect.

    http://www.flickr.com/photos/sss_random_shots/3056337614/sizes/o/

    And finally a single resize by XnView using sinc/lanczos interpolator:

    http://www.flickr.com/photos/sss_random_shots/3055500557/sizes/o/

    Now you tell me if you can see a difference in the two resized
    pictures and which one looks better to you, and why. Which one would
    you rather show to other people? And if you can't see any difference,
    tell me that as well.
    Your indifference only reveals you to be a hack.

    Steve
     
    Steve, Nov 25, 2008
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