Re: LaCie 526 - problems in color rendering
Re: LaCie 526 - problems in color rendering
- Subject: Re: LaCie 526 - problems in color rendering
- From: Graeme Gill <email@hidden>
- Date: Fri, 08 Feb 2008 10:19:26 +1100
J. Raimar Kuhnen wrote:
The UGRA exactly uses the RIT empiric data for their recommendation. To be
precise, they recommend 5.600-6.000K for PT 1 - the arithemtic average is
5.800K.
A paper at the last CIC indicates that some of the issues of visual
display white point matching are due to spectrometer bandwidth
limitations (CIC15, "Improving the Color Match between Monitor
and Hardcopy (Interactive) , Tohru Sugiyama, Yoshiaki Kudo, and
Youichi Takayama, Dai Nippon Printing Co, Ltd. (Japan). pp 71).
Some recent experience of mine hints that the accuracy of white
point setting on many displays is suspect too. Using the
native EIZO calibration software on a recent EIZO
display produced a delta E of 10 in setting a white point
of D65 when verified by other software using the same instrument!
Add that to the inaccuracies of colorimeters, and the
differences between the theoretical and actual white point
in a viewing booth using fluorescent D50 simulators combined
with the paper white, and I'd be surprised if notional
display and viewing booth D50 white points are actually
that close to being D50. When viewed in isolation you
would be unaware of such errors.
You really need an expensive instrument to verify
white point matching under these circumstances, before
looking to other effects to explain further visual mismatch.
Graeme Gill.
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