Do you see the cast in the prints only, or on your display as well? (My display is an entry-level IPS, HP ZR22W, calibrated a month ago using Xrite i1 DisplayPro and dispcalGUI 1.7.1.6 and Argyll CMS 1.5.1. I prefer the 'not-corrected' version, I'd say that one is right, the other has a blue tinge.)
On 23 November 2015 at 21:02, Francisco Cribari <crib...@gmail.com> wrote: > 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 <k...@kovacs-telekes.org> > 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) ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741551&iu=/4140 _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
