Re: Monitor White Point Confusion
Re: Monitor White Point Confusion
- Subject: Re: Monitor White Point Confusion
- From: Andrew Rodney <email@hidden>
- Date: Mon, 04 Mar 2019 13:08:32 -0700
> On Mar 4, 2019, at 9:39 AM, Louis Dina <email@hidden> wrote:
>
> I have some confusion on the selection of white point when calibrating my
> monitors.
>
> I have always used Native White Point and had good results with my Dell
> Adobe RGB LCD monitor. A good monitor to print match is important to me.
> The Native WP on this monitor is around 5700-5800K, which works well with
> the somewhat neutral to warm papers I print on.
Native WP is somewhat useful for some displays, such as lower end 6-8 bit per
color panels.
"Forcing" a WP using some LUT could introduce banding and as such, a Native
setting leaves this alone. But that native setting doesn't in any way ensure a
visual match to your print when soft proofing.
> I know that an image displayed in Photoshop without an active soft proof
> will be mapped to monitor white . So, a monitor calibrated to 6500K will
> display cooler than a monitor calibrated to 5000K.
There's an RGB working space and there's a display profile and there's always
Display Using Monitor Compensation with the two profiles. Or there's a printer
output space and the display, again DUMC.
> But, when you soft proof, with the Paper White box checked, shouldn't the
> soft proof look the same on a 5000K and a 6500K MONITOR?
What I do with my SpectraView's is calibrate for a visual match, using WP
settings of course, WITH the image set with this paper white mapping ON. These
settings are therefore output specific with the soft proof for the printer
using paper and ink simulation on.
> As I understand
> it, two "conversions" occur. The first conversion is from the document
> working space to the printer profile. Then a second conversion occurs from
> the printer profile numbers to the monitor using RC rendering.
That is my understanding as well.
> If neither
> Black Ink or Paper White boxes are checked, the simulation on screen
> ignores paper color and weak blacks. But, if Paper White is checked,
> shouldn't the paper color and reduced dynamic range appear the same on
> monitors that are calibrated differently.
DR and paper white (color). You really want those settings on or you're viewing
a print at a DR that's simply impossible (1000:1 or far more).
> That doesn't seem to be my
> experience. I'm assuming that the monitor profiles accurately characterize
> the current calibration of each monitor.
The calibration is, in my use, that to produce a match to the soft proof. And I
can build multiple calibrations for differing papers thanks to SpectraView.
> I'd prefer to calibrate to 6500K, but I find my prints always come out too
> yellow because I am adding more yellow to my image on screen to compensate
> for the cooler display. When printed, the warmth of most of my papers
> results in skin tones that are too yellow.
And that's the issue. It isn't what you prefer, it's what produces a visual
match to the paper on-screen. That's why it makes sense to target the
calibration for a match. And that match includes paper white.
There's a video on my web site that covers all this ("Why are my prints too
dark").
Andrew Rodney
http://www.digitaldog.net/
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