The interface takes some getting used to is it worth the learning curve? I would be grateful if someone could confirm whether the above behaviour is expected and if so, what would be a suitable work-around.The Darktable RAW photo editor, light table and workflow manager takes a different approach to photo editing and management. By contrast, if I load a JPEG file from the camera into GIMP, both tags are set to sRGB and there is no problem with thumbnails. This is obviously unsatisfactory in itself, but owing to the tag remaining as Uncalibrated, I cannot be sure the image has the sRGB profile embedded. Curiously, this does not change either of the two ColorSpace tags above. I have found the only way to show the thumbnail correctly in Gwenview is to reload the JPEG into GIMP, ensuring that the option to promote imported images to floating point precision is unchecked, specifically assign the GIMP built-in sRGB profile, then re-export as a JPEG. To add to the doubt, the Gwenview image viewer, while it shows the full-sized image correctly, displays the thumbnails much too dark. I have been advised that some images that I sent out as JPEG files did not contain an embedded profile, although GIMP's Image Properties insist that they have the GIMP built-in sRGB. The Colorspace information for the image that Darktable exports shows up in Image -> Metadata -> View Metadata as: In my case my starting point is Nikon NEF files.
In most cases the desired final output from GIMP is a JPEG with sRGB profile but I can find no settings which give me confidence that this is working properly.
This is logical since it is desirable to work with floating point precision in GIMP 2.10. When using GIMP's Darktable plugin, I think I am right in saying that that closing Darktable always imports the image into GIMP in the form of a floating point EXR file with profile linear Rec709 RGB. This issue refers to GIMP 2.10.8 and Darktable 2.4.4, running in Linux (KDE). I now believe this to be a GIMP issue, but I cannot be sure whether the behaviour described is effectively a bug in GIMP or whether I am missing something. I am new to this group, but was referred to it after posting a description of the problem below to the Darktable forum.
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