Re: [Gimp-user] Gimp 2.10 and exif-information
I have exported a tif file from Darktable: % exiv2 DSC_3804.tif File name : DSC_3804.tif File size : 30541086 Bytes MIME type : image/tiff Image size : 1920 x 1595 Camera make : NIKON CORPORATION Camera model: NIKON D50 Image timestamp : 2011:04:19 21:01:07 Image number: Exposure time : 1/200 s Aperture: F32 Exposure bias : 0 EV Flash : No flash Flash bias : Focal length: 90.0 mm (35 mm equivalent: 135.0 mm) Subject distance: ISO speed : 800 Exposure mode : Manual Metering mode : Multi-segment Macro mode : Image quality : RAW Exif Resolution : 1920 x 1595 White balance : AUTO Thumbnail : None Copyright : Exif comment: Then I opened it in Gimp2.10 and exported it to a jpg, png and renamed tif file. In all those cases (exported by Gimp) the exif-information looked like this: % exiv2 DSC_3802.tif File name : DSC_3802.tif File size : 36912158 Bytes MIME type : image/tiff Image size : 1920 x 1595 Camera make : Camera model: Image timestamp : Image number: Exposure time : Aperture: Exposure bias : Flash : Flash bias : Focal length: Subject distance: ISO speed : Exposure mode : Metering mode : Macro mode : Image quality : Exif Resolution : 1920 x 1595 White balance : Thumbnail : None Copyright : Exif comment: As you can see, most of the information in the original file was lost. This is a serious problem for me if I want to use Gimp in my postprosessing of photographs. Regards Johann -- J.H. Spies - Tel. 021-982 2694 / 082 782 0336 / 021-808 4699(w) Posbus 4668, Tygervallei 7536 "For to me to live is Christ, and to die is gain." Philippians 1:21 ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] Gimp 2.10 and exif-information
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
--
This email was written using 300% recycled letters.
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Re: [Gimp-user] Gimp 2.10 and exif-information
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?
> 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.
> 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... :(
Regards
Johann
--
J.H. Spies - Tel. 021-982 2694 / 082 782 0336 / 021-808 4699(w)
Posbus 4668, Tygervallei 7536
"Study to shew thyself approved unto God, a workman
that needeth not to be ashamed, rightly dividing the
word of truth." II Timothy 2:15
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Re: [Gimp-user] Gimp 2.10 and exif-information
On Fri, May 11, 2018 at 10:10:37PM +0200, Johann Spies wrote:
> I have read on a 12-year old flickr discussion that Gimp does not save
> exif information in other formats than XCF and jpeg.
>
> I just experimented with Darktable exporting an image to Gimp2.10 which pass
> it back to Darktable using png and tiff(32bit) formats and in both cases
> the exif-information of the image edited in Gimp was missing. Is there
> a way to do this exchange in tif (which I prefer) and keep the
> exif-information?
>
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 remove fields because what I put online
is typically reduced to 2048 pixels maximum dimension, so
information from the camera quoting an original image size will be
at best misleading.
And I assume that I can still do this in 2.10, but since it is
something I do as the last stage of processing I have not had
occassion to try it. To be more specific: gimp creates some, maybe
all, fields, but what I want is to 'publish' only a few, and to add
e.g. title and license. My current process re-reads EXIF data from
the camera's own jpeg.
Not sure platform you are working on, but perhaps you can do
something similar. And in general things change over 12 years!
Even the size of files you can upload to flickr.
ĸen
--
This email was written using 100% recycled letters.
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[Gimp-user] Gimp 2.10 and exif-information
I have read on a 12-year old flickr discussion that Gimp does not save exif information in other formats than XCF and jpeg. I just experimented with Darktable exporting an image to Gimp2.10 which pass it back to Darktable using png and tiff(32bit) formats and in both cases the exif-information of the image edited in Gimp was missing. Is there a way to do this exchange in tif (which I prefer) and keep the exif-information? Regards Johann -- J.H. Spies - Tel. 021-982 2694 / 082 782 0336 / 021-808 4699(w) Posbus 4668, Tygervallei 7536 "Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord." I Corinthians 15:58 ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
