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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