Re: [Gimp-user] Editing Photos and Maintaining Exif Information

[Wolfgang Hugemann <Auto Hugemann de>]

> Exif.Image.DateTime is the more correct date for when the image itself was
> generated.

I've just checked that and found this explanation to be correct.

But nevertheless, Gimp rewrites some other EXIF-Information it rather 
shouldn't, like Fnumber. Identifying the orignal photo with ImageMagick

identify -format "%[Exif:fnumber]" photo.jpg

yields e.g. 37/10, whereas the same command on the Gimp JPEG export 
yields f/3.7. I admit that's smarter, but has to be dealt with in my 
script. There are a few other data entries which are also deleted or 
modified.

When modifiying a JPEG image, Gimp should restrict rewriting of EXIF 
entries to those that have really been altered.

Wolfgang Hugemann