Datacolor User to User Support Group.

Hi everyone,

I am having a similar problem - the monitor hooked to VGA is very 
yellow, but the DVI monitor looks great. If images are optimized on 
the DVI monitor they print perfectly. The two monitors are same 
company and almost the same model. I wonder if I wouldn't get at 
least 'better' results if I assign the profile for monitor 1 to 
monitor 2.

Nita


 --- In colorvision_group@yahoogroups.com, "str_online" 
<str_online@...> wrote:
>
> A few additions:
> 
> - Ambient lighting:
> 
> The ambient lighting in a 5m x 5m room consists of one 60W light 
bulb,
> one fluorescent tube and one "warm tone" fluorescent tube. Together.
> So, it's a mess, I know. This is not a lab. I can choose either
> incandescent or fluorescent, though. I don't know about light 
levels,
> but it's generally dim (and warm).
> 
> - Calibration method:
> 
> I adjust the RGB sliders on my LCD and CRT until Spyder3Pro says the
> RGB levels are close enough. Then I let Spyder to profile the 
screens.
> 
> I forgot to mention that my CRT has both color temp and RGB 
sliders. I
> use the sliders for calibration. Kelvins I only use in software to 
set
> targets.
> 
> 
> ps. I know that "everything is wrong": lcd+crt, old hardware, only 
one
> graphics card (and consumer 3D card) and bad lighting and so on, but
> still I try to get at least some improvement, with ~zero budget. In
> the worst case, this just becomes a learning experience.
> 
> --- In colorvision_group@yahoogroups.com, "str_online"
> <str_online@> wrote:
> >
> > This seems to be more complicated than I first thought.
> > 
> > First, I will state my aims, and then ask a few questions.
> > 
> > I take digital photographs. I convert these to jpegs and 
distribute
> > them for viewing on cheap consumer grade LCD screens at home. No
> > printing. The ambient lighting is unknown, but usually dim, and 
LCDs
> > are bright. I hope that if I adjust some tone visually to neutral
> > grey, then it also looks neutral grey on the recipients LCD, given
> > that it is reasonably grey-balanced at similar color temp that 
mine.
> > 
> > I have two screens because I want to keep editors open in one and
> > music player, email etc in the other. I only work with images on 
one
> > screen at a time.
> > 
> > ------------
> > So... back to questions...
> > 
> > I initially calibrated both my CRT and my LCD to 2.2 gamma, 
6500K. The
> > OSD on the CRT allows me to set a color temp 6000K, 6500K, 7000K 
(and
> > up). The LCD OSD has RGB sliders.
> > 
> > A few tries:
> > 
> >    Cal target Monitor OSD
> > CRT 2.2 6500K RGB=56,51,46%
> > LCD 2.2 6500K RGB=43,43,50% bad lcd-crt match
> > LCD 2.2 5800K RGB=56,51,46% better lcd-crt match
> > LCD 2.2 5500K RGB=60+,50,40-% I can't even get a neutral white 
here
> > 
> > - So I guess I should use 5800K for the LCD then? Maybe also try 
with
> > 6000K for the CRT?
> > 
> > - Should I use 5800K or native fpr the LCD, by the way?
> > 
> > - Does this CRT-LCD matching have some adverse effects? Or should 
I
> > just accept that the image looks different on two screens? That 
there
> > cannot be something that's neutral grey on both screens at the 
same
> > time? References, howtos, other litterature?
> > 
> > 
> > --- In colorvision_group@yahoogroups.com, Cdtobie <CDTobie@> 
wrote:
> > >
> > > Several possibilities. First: you simply cannot harness a 
racehorse  
> > > and a donkey together and get a working team. A CRT is a much  
> > > different animal from an LCD, and it's just not reasonable to 
try to  
> > > pair them for precision work.
> > > 
> > > Next: the fact that both displays show a change in SpyderProof 
does  
> > > not actually guarantee that both have unique calibration data 
being  
> > > loaded to them, and both are using unique profiles (seperate
> items, by  
> > > the way). The calibration could be great as you do each screen, 
but  
> > > they may be overwriting one another if the card can't manage 
unique  
> > > calibration data. Try adding another card.
> > > 
> > > Third: you don't note what process you are using to calibrate, 
or
> what  
> > > target values are involved. If you are at an inappropriate 
luminance  
> > > or inappropriate whitepoint for your lighting level, then the 
two  
> > > displays may be affected differently by this, being different
> types of  
> > > displays.
> > > 
> > > Whatever the cause, given the configuration you are trying to 
match,  
> > > you may find it necessary to calibrate to two different
> whitepoints to  
> > > get the effect you want.
> > > 
> > > C. D. Tobie
> > > WW Product Technology Mngr.
> > > Digital Imaging & Home Theater
> > > DataColor.com
> > > CDTobie@
> > > 
> > > On Jan 19, 2009, at 9:00 AM, "str_online" <str_online@> wrote:
> > > 
> > > > I have attached two monitors to one dual-head graphics card on
> Vista.
> > > > Vista recognizes them both as "Generic Non-PnP Monitor - 
NVIDIA
> > > > Geforce 7800 GTX". One of the displays is a 17'' Dell 1703 FPs
> LCD and
> > > > the other is an old 21'' Nokia Multigraph 445X CRT.
> > > >
> > > > I have both calibrated and profiled these monitors using
> Spyder3. Then
> > > > using Spyder3Pro software (Spyderproof) I have verified that 
the ICC
> > > > profiles have been applied to their respective monitors. At
> least when
> > > > I switch back and forth between "before calibration" 
and "after
> > > > calibration" the looks of the screen changes on both devices 
(to
> > > > better). A recalibration check tells that both screens are  
> > > > calibrated ok.
> > > >
> > > > They should now look the same, right?
> > > > No, they don't.
> > > >
> > > > I even matched their brightness by trial and error (adjust,
> calibrate,
> > > > repeat until good). The CRT still has a yellow cast and the 
LCD
> has a
> > > > blue cast. Or maybe it's neutral, but relatively the CRT is
> warmer. A
> > > > lot. Then I thought that maybe the screens frame affects 
visual
> > > > perception. I looked at the screens through a tube to exclude
> > > > environmental effects. The CRT is warmer.
> > > >
> > > > Calibration (both monitors offer RGB adjustments that adjust 
color,
> > > > somehow):
> > > > LCD RGB=43%,43%,50% to produce pure white measured by Spyder.
> > > > CRT RGB=56%,51%,46% measured. But if I change these *after*
> > > > calibration and profiling to 45%,40%,52% then the screens look
> more  
> > > > like.
> > > >
> > > > So... adjusting RGB on these screens makes white purer on both
> > > > devices, but if I want identical colors I need to set similar
> > > > %-values. Oops. Profiling is not supposed to work like this, 
so
> what's
> > > > wrong?
> > > >
> > > > Any ideas would be much appreciated. Thanks.
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> >
>