Re: Monitor calibration software/hardware
Re: Monitor calibration software/hardware
- Subject: Re: Monitor calibration software/hardware
- From: MARK SEGAL <email@hidden>
- Date: Fri, 21 Sep 2007 20:53:34 -0400 (EDT)
Derrick and Andrew,
There is one point here in particular that interests me - a purely technical one. Derrick, you may recall that some time back when you and Jack made a presentation on colour management here in Toronto there was discussion of the appropriate white point to select for monitor calibration. This was in the context of "WYSIWYG" between the soft-proof on the display and the print, all due allowances made for the difference between transmitted and reflected light etc. I distinctly remember the gist of the discussion being that while one could logically think a D50 white point would correlate properly with a D50 light source for viewing the prints, given how we humans see, such is not the case; rather we get a better display to print match with the display at D65 and the print viewing light source at D50. It had something to do with D50 on a display looking too yellow and dull relative to D50 lighting. Indeed, I find this to be the case in my set-up, where the room is dim unless
I turn on the D50 lighting for viewing results. So my questions here: has the passage of time and new information revised this wisdom?
Now, let me ask two supplementaries on the cyan/green issue Derrick mentions below. When I run ColorEyes Validation, the software generates 14 extra patches, of which according to the read-out produced, 11 are shades of grey and the other three are R, G and B at level 255 each. Usually, my validation shows insignificant Delta-E for those three primaries - most of the DE occurs in the grey readings. So with this kind of result, two questions: (1) where does Cyan come into the picture (OK it's green and blue but not measured as "Cyan", and (2) when I'm getting DE of 0.07 for these primaries, what possible difference would it make whether I calibrated my display (in this case a LaCie 321) at D50 or D65?
Mark Segal
Derrick Brown <email@hidden> wrote:
Our simple validation is both grey scale values and the three primary
colors.
......................... Ive used that tool to show
them how much better those difficult cyans and greens are when
running their white point to D50 instead of D65.
Its not hard, and they get that.
I am all for keeping it simple for the user base .
Derrick Brown
Integrated Color Corporation
81 Rogers Street
N. Billerica, MA 01862
tel: 978-670-1416
email@hidden
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