Re: SpectrocamPro and Printopen
Re: SpectrocamPro and Printopen
- Subject: Re: SpectrocamPro and Printopen
- From: Phil Green <email@hidden>
- Date: Tue, 05 Dec 2000 22:03:08 +0000
- Organization: LCP
Your new LAB values [86,31;88,41;67,65] are calculated for the D55
illuminant. The question really is why (or how) the illuminant has been
changed. If you manually edit the file to specify D50, I expect you'll
get back to the numbers you started with.
>
My Preferences are Set to D50 / 2degrees.
>
>
I measure my Printopen form and get the following reading on
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the B1 patch (just an example):
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L 95,33
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a 0,59
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b -2,30
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I then export the data in Printopen format and I notice that
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the header sais D55 (!?)
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The XYZ values for the B1 in the ASCII file are:
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>
X 85,56
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Y 88,41
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Z 75,41
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Directly after importing the ascii file into printopen 3.02
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the B1 patch reads:
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L 95,33
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a 2,04
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b 4,72
>
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and
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X 86,31
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Y 88,41
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Z 67,65
>
--
Phil Green
Colour Imaging Group
School of Printing and Publishing
LCP
Elephant and Castle, London SE1 6SB
Tel: +44 020 7514 6759 Fax: +44 020 7514 6772
http://twinpentium.lcp.linst.ac.uk/digitalcolor/cig