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google-code-export / thebigpicture

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Implement Exif tag nums #8

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
For the ability to read and write Exif tags, the library needs to know the
names, numbers, data types and data lengths of all the tags. This is
currently implemented for the Tiff IFD, but for the Exif and GPS IFD's the
types and counts are still missing.

The question is whether the library needs to know which tags are required.
When editing an existing file it's unlikely that tags are missing or that
the user will delete existing tags.

If this is implemented, we need to account for different requirements in
JPEG and TIFF images.

Original issue reported on code.google.com by p.edel...@gmail.com on 14 Mar 2007 at 7:54

GoogleCodeExporter commented 9 years ago 
One problem is that, over the years, various new tag types have been added that 
don't
show up in the Exif spec. For example, XMP data is stored at tag 700, and IPTC 
info
at tag 33723 in the Tiff IFD (in TIFF files, in JPEG both have a different 
segment).

Original comment by p.edel...@gmail.com on 14 Mar 2007 at 8:05

GoogleCodeExporter commented 9 years ago

Original comment by p.edel...@gmail.com on 16 Mar 2007 at 10:16

GoogleCodeExporter commented 9 years ago 
This should be resolved in the second alpha version.

Original comment by p.edel...@gmail.com on 18 Mar 2007 at 8:34

GoogleCodeExporter commented 9 years ago 
v1-alpha2 is an intermediate release. This issue is shifted to v1-alpha3.

Original comment by p.edel...@gmail.com on 10 Apr 2007 at 9:11

GoogleCodeExporter commented 9 years ago

Original comment by p.edel...@gmail.com on 10 Apr 2007 at 9:11