Re: UGRA/UDACT-conforming displays [was: i1Display x i1Pro]
Re: UGRA/UDACT-conforming displays [was: i1Display x i1Pro]
- Subject: Re: UGRA/UDACT-conforming displays [was: i1Display x i1Pro]
- From: Eric Nunn <email@hidden>
- Date: Sat, 28 Mar 2009 16:33:49 +0000
Roger,
I too will be experimenting with luminance settings as UDACT whilst
recommending luminance of at least 120cd/m2 also suggests D50/160cd/m2/
L*. My feeling is that the 160 luminance is partially to offset the
D50? But in my clients case we are not comparing to a viewing booth
directly, so up to now I have been calibrating to D65/120/gamma2.2.
I want to run tests to see in what way the different settings affect
the score in UDACT.
And incidentally, when the UDACT kit was ordered from Ugra, it was
advertised as coming with a DTP94, and basiCColor, but when it arrived
it was an iDisplay2! Slightly miffed as I have never used one...
s'later
Eric
On 28 Mar 2009, at 16:16, Roger wrote:
Eric,
I agree fully on L* transfer function, it is most logical. D50 is
still good
and 120 cd/m2 minimum is also very good. Although, I remember
calibrating a
LaCIE 324 to 160 cd/m2 this week, as it didn't impress me as
appearing too
bright at that luminance and, since IDEAlliance's recommended
luminance for
soft proofing is also 160, I figured I'll start experimenting with
that
value with selected clients.
As for L* calibration, I believe it's also an option in Argyll. L* is
becoming ubiquitous. Isn't eciRGBv2 also L*-based? Which is also D50-
based?
I really like eciRGB's "design".
Thank's for clarification regarding the yummy score ;-)
I'll make a point to revisit iMatch soon to witness this for myself...
Best / Roger
Whilst I feel that the ACD's are perfectly fit for purpose they
appear
unable to conform to the numbers for the UDACT certification on an
individual basis, Ugra are very clear on what is and isn't
acceptable
for soft proofing, Gamma 2.2 for instance is ruled out in favour of
L*. D50 whitepoint and a minimum luminance of 120cd/m2. Which means
for conformance we will have to use a calibration software such as
ColorEyes or basiCColor that provides L* settings.
And no, the yummy figures are not UDACT, I was referring to the
validation score through the Monitor validation tool in i1Match.
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