Hello,
I could see no difference between them.
Regards,
J.-Luc
> Message du 23/11/15 21:05
> De : "Francisco Cribari"
> A : "KOVÁCS István"
> Copie à : "Darktable-users"
> Objet : Re: [Darktable-users] Street photography and Darktable
>
>
Dear Kofa,
>
I proceeded as you suggested in Gimp and the gradient does *not* look brownish
on my monitor. I always calibrate my monitors using dispcalGUI + ColorHug. I've
printed a fairly large number of black and white of photos (here in Brazil and
also at Blurb) and noticed a slight brownish (warm) tint on them (at least, on
most of them). That's why I use the minor correction I described in the video
which is made using Darktable's color correction module. (It does not work when
the BW conversion is done using channel mixer since channel mixer comes after
color correction in the pipeline. I then use the monochrome module for BW
conversion.) Having said that, the problem might as well be on my end.
>
I have just exported the same photo without and with the correction. Could you
please take a look at them and let me know how they look on your monitor?
>
no correction:
https://dl.dropboxusercontent.com/u/2171814/photo-not-corrected.jpg
>
correction: https://dl.dropboxusercontent.com/u/2171814/photo-corrected.jpg
>
It would be useful if other people could do the same and let me know how they
see the two photos on their monitors.
>
Thanks for your feedback. Francisco
>
>
On Mon, Nov 23, 2015 at 4:32 PM, KOVÁCS István wrote:
>
Dear Francesco,
>
> Thanks for letting us peek into your process; I like your images a
> lot, and it was interesting to see what you do in the darkroom (of
> course getting an interesting composition is the basis for everything
> you do).
> One thing that caught my attention was you mentioning a brownish cast
> that you had to correct in the Colour correction module. I seem to
> recall you mentioning this previously on Google+; I think there the
> consensus was that likely your display profile is wrong - R=G=B should
> give a neutral grey. Could you check this by launching Gimp, loading
> your display profile (Edit/Preferences/Color Management/Monitor
> profile), then create a gradient from black to white. If it looks
> brownish, your profile is definitely broken.
>
> OTOH, if you simply prefer a slightly cooler, blueish hue, it's simply
> personal preference.
>
> Thanks again,
> Kofa
>
>
>
--
>
Francisco Cribari - http://www.cribari.com.br - "All theory, my friend, is
grey, but green is life's glad golden tree." --Goethe (Faust)
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