On Thu, Jul 1, 2021 at 10:52 AM GianLuca Sarto <glsa...@tiscali.it> wrote:

> Not sure if it is a color profile problem, given the monochromatic image.
>

The speed of transition from dark tones to light tones is part of the
profile, so it affects BW images as well, to my knowledge.


> The comparison is made on screen, between Darktable and Gimp.
>
> In Gimp, the image is a little darker, so shadows' detail is partially
> lost.
>
> I would have expected that the tiff in Gimp was an exact copy of DT.
>

If the comparison is on screen - and the same screen with the same
operating system - then color management "should" not differ and you are
right to expect the exact same appearance. If that is not the case, then I
tend to think that GIMP is doing something with the profile. If you were
requested to keep the original profile or convert to another one and kept
the original one... then I don't know :)
In GIMP, consider investigating Image -> Color Management -> Assign Color
Profile (or Image Properties) and see what profile is associated with that
picture and if differs from the profile you choose when exporting from DT.

Other than issues with color management I don't have any plausible
explanation for what you are experiencing.

Best,

Emanuele


> On 01/07/21 10:20, Emanuele Olivetti wrote:
>
> Howdy,
>
> What about the color profile associated with the TIFF and how was it
> managed by GIMP and by your printer?
> When you say that you "compared the Tiff with the image on DT", how did
> you do exactly?
>
> At first sight, I would say that you experienced a problem in color
> management. But correct me if I'm wrong.
>
> Best,
>
> Emanuele
>
>
> On Thu, Jul 1, 2021 at 9:23 AM GianLuca Sarto <glsa...@tiscali.it> wrote:
>
>> Hello All,
>>
>> I was working [DT v3.4.1, Linux] on a BW image, when finished, I
>> exported to Tiff, leaving Profile/Intent as Image Settings.
>>
>> Later, when I printed the image with Gimp, I noticed that the image on
>> paper was darker and some detail in the shadows was lost.
>>
>> I thought it was a limitation of the printer, but then I compared the
>> Tiff with the image on DT, it was the Tiff that had lost detail in the
>> shadows.
>>
>> Is this something to be expected when exporting? or am I missing
>> something?
>>
>> Thanks for your comments,
>>
>> -Gian
>>
>>
>>
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