[Octave-bug-tracker] [bug #45662] Do not complain about being limited to 16 bits per pixel

[Orion Poplawski]

URL:
  <http://savannah.gnu.org/bugs/?45662>

                 Summary: Do not complain about being limited to 16 bits per
pixel
                 Project: GNU Octave
            Submitted by: opoplawski
            Submitted on: Thu 30 Jul 2015 10:27:21 PM GMT
                Category: Libraries
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Other
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.0
        Operating System: GNU/Linux

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Details:

>> I = imread("img006.jpg")
warning: your version of GraphicsMagick limits images to 16 bits per pixel
warning: called from
    imformats>default_formats at line 256 column 11
    imformats at line 79 column 3
    imageIO at line 106 column 11
    imread at line 106 column 30

yet http://wiki.octave.org/GraphicsMagick#Quantum_depth states:

Warning: Increasing quantum depth may have a dramatic increase in memory
usage. If you use QuantumDepth 32, all images will be read with that precision
even if they were saved with 8bit. This means that a 100MB 8bit image will
temporarily take 400MB memory, or more if the image was compressed and they
usually are, before Octave resizes it back down to 100MB. Because of this,
because 32 bit integers images are rare, and because GraphicsMagick does not
handle floating point, it's recommended to use QuantumDepth of 16.

If it is recommended, do not warn about it.




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