[argyllcms] Re: Gamma problems
- From: David Garabana Barro <david@xxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 10 Nov 2009 01:40:06 +0100
This was not intented to be sent to the list.
Please, ignore it
I'm sorry very much
O Martes, 10 de Novembro de 2009, David Garabana Barro escribiu:
> O Luns, 9 de Novembro de 2009, Denis S escribiu:
> > David Garabana Barro wrote:
> > > I seems white is brighter on xrite's profile, and black is about the
> > > same. So yes, it's noticeable.
> >
> > The reason that white look brighter could be in different color
> > temperature IMHO, but I'm not sure. Let's wait if someone more
> > knowledgeable try to answer your question.
>
> But Color temperature is the same according to dispcal. I bet "-a" option
> was changing gamma and contrast taking in account my illumination. I have
> also tried with several illuminations. The higher the illumination, the
> lower the gamma.
> Definitely I think that was my problem.
>
> > Yeah, I've just checked it. I didn't know you correct profile for
> > ambient light, I completely forgot that there are such devices which can
> > do this... I usually just skip this step.
> > BTW here is good explanation about Gamma, not sure if you read it
> > already: http://www.argyllcms.com/doc/dispcal.html search for -g gamma
>
> Believe me, I have read all the documentation you can imagine ;)
> But color management is a hard field and my memory it's not the best in the
> world. I feel so embarrased for not realised before :(
>
> > > How can I see the errors on an already created profile?
> >
> > Just set configured profile and issue dispcal -v -yc -r (not -R as this
> > option is used for uncalibrated measurement).
> > you'll see DE for color temperatures.
>
> OK, I though you were referring to color representation errors. I know
> colprof gives you a summary when it ends:
>
> profile check complete, peak err = 4.295966, avg err = 0.938010
>
> but I don't know how to obtain that data with prebuilt ones...
>
> > BTW you actually have very impressive DEs which are close to zero... if
> > you look at info I've sent you in previous mail, you'll spot that error
> > on my monitor is around 15 :)
>
> cannot you adjust R,G and B cannon from CRT OSM?
>
> > > Mine is a NEC FE950. It was a very good CRT, but it has its age...
> >
> > If believe to measured data you should have almost ideal colors. Wonder
> > how do you use your monitor, are you in photography as I'm, or graphic
> > or something else?
>
> I really make a little bit of everything ;)
> But yes, I use it a lot for photography processing. I'm also learning about
> that :)
>
> > Also if it's not hard for you, could you please check this post and tell
> > if you have similar problem as described by me in this
> > //www.freelists.org/post/argyllcms/Pink-tinted-cursor thread?
> > I've seen that you also target monitor to 6500 and I feel that it's just
> > me who have problems with cursor :P
>
> I have no problem at all with cursor. It changes its colour when I change
> profile.
>
> > Have a great day!
>
> Idem, and thanks for your support! :)
>
--
David Garabana Barro
jabber & google talk ID: david@xxxxxxxxxxxx
Clave pública PGP/GPG: http://davide.garabana.com/pgp.html
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