[Octave-bug-tracker] [bug #47706] imfinfo: issues with exif tag names

[Carnë Draug]

URL:
  <http://savannah.gnu.org/bugs/?47706>

                 Summary: imfinfo: issues with exif tag names
                 Project: GNU Octave
            Submitted by: carandraug
            Submitted on: Fri 15 Apr 2016 12:03:18 GMT
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

I'm not sure of what's happening here but the end point is that Matlab is
naming an exif tag as `ISOSpeedRatings` which does not appear under Octave.
See
http://stackoverflow.com/questions/36644018/how-to-read-iso-speed-of-an-image-in-octave/36646300#36646300

What Octave does is an hardcoded list of EXIF tags and tehn looks for them
within the very large of graphicsmagick tags
http://hg.savannah.gnu.org/hgweb/octave/file/1dda942a2514/libinterp/dldfcn/__magick_read__.cc#l1981

This may be fixed by replacing the search for that specific list of tags by
using all tags that start by "Exif:" and then remove all the ones we don't
want.

But that is dependent on what GM does which I don't know.  Would be nice to
have the problematic image for testing (I have asked on the SO question for
it).




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