Re: [Gimp-user] Gimp 2.10 and exif-information

[Ken Moffat <zarniwhoop ntlworld com>]

Whoops, managed to reply to Johann instead of to the list, and then
I got the list address wrong.  Not a good day, but lemme give it
another try before I sack myself.

On Sat, May 12, 2018 at 08:14:25PM +0200, Johann Spies wrote:
> On Fri, May 11, 2018 at 10:11:32PM +0100, Ken Moffat via gimp-user-list wrote> I've edited EXIF information 
> in a png created from gimp-2.{8,9}
> > after importing from {,n}ufraw, using Image::ExifTool in a bash script
> > to add and remove fields.
>
> I do not want to use ExifTool in this case.  My problem is that I open
> an image with a lot of exif-information in Gimp and when Gimp exports
> it, those information is lost.  How can I prevent Gimp from doing it?

That does not match my current experience with 2.10.0 - I have just
opened a raw image as 16-bit in Gimp (using nufraw), straightened it up
and sharpened it, then exported as png (16-bit) and tiff (seems to
be 32-bit).

I than used exiftool -a on each, with similar results.  Some of the
output from the tiff file:

ExifTool Version Number         : 10.80
File Name                       : p8272328-timetable.tif
Directory                       : photos/bergstrecke
File Size                       : 76 MB
File Modification Date/Time     : 2018:05:13 21:02:27+01:00
...
File Type                       : TIFF
File Type Extension             : tif
MIME Type                       : image/tiff
Exif Byte Order                 : Little-endian (Intel, II)
Processing Software             : nUFRaw 0.41
Subfile Type                    : Full-resolution Image
Image Width                     : 2560
Image Height                    : 1930
Bits Per Sample                 : 32 32 32 32
Compression                     : Uncompressed
Photometric Interpretation      : RGB
...
Image Description               : OLYMPUS DIGITAL CAMERA
Make                            : OLYMPUS IMAGING CORP.
Camera Model Name               : E-510
...
Software                        : GIMP 2.10.0
Modify Date                     : 2018:05:13 21:02:24
Subfile Type                    : Reduced-resolution image
Image Width                     : 256
Image Height                    : 193
...
Exposure Time                   : 1/60
F Number                        : 4.5
Exposure Program                : Program AE
ISO                             : 200
Exif Version                    : 0221
Date/Time Original              : 2011:08:27 11:13:12
--- lots more snipped ---

So it has the EXIF data, and also a 256x193 thumbnail.

> > My current process re-reads EXIF data from
> > the camera's own jpeg.
>
> I do not take photos in jpeg.  Work with raw mostly with Darktable but
> there are time when I want to edit a photo in Gimp.
I take both - for what I'm doing, the jpeg usually gives me a quick
look on a computer where I can say "has possibilities | meh"

> > Not sure platform you are working on, but perhaps you can do
> > something similar.  And in general things change over 12 years!
>
> It seems that the information about Gimp not giving back the
> Exif-information has not changed that much in 12 year... :(

Documentation is either free, and can be updated, or it is chained
down in immutable form and may be out of date.

ĸen
-- 
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