Hi,
the clipping conditions are different from those of out-of-gamut?
Thanks,
Andrea
Marti Maria wrote:
Hi,
[...]
This xyY is outside of the xy chromaticity diagram
but iictrans report a valid RGB (not the out-of-gamut value).
Is this correct?
It seems so... converting the XYZ across WideGamut profile,
as you can see it gives a valid RGB
F:\lcms>icctrans -t1 -i*XYZ -o"Wide Gamut RGB.icm"
little cms ColorSpace conversion calculator - v1.8
Enter values, 'q' to quit
X? 0
Y? .3
Z? .054
R=0.00 G=175.20 B=59.53
Now, back to RGB to check if there is some clipping...
F:\lcms>icctrans -t1 -o*XYZ -i"Wide Gamut RGB.icm"
little cms ColorSpace conversion calculator - v1.8
Enter values, 'q' to quit
R (0..255)? 0
G (0..255)? 175
B (0..255)? 60
X=5.0201 Y=31.7322 Z=5.4474
So, it seems to be near gamut boundary.
Regards,
Marti Maria
The little cms project
http://www.littlecms.com
----- Original Message -----
From: "Andrea Galligani" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, December 20, 2004 2:30 PM
Subject: Re: [Lcms-user] out-of-gamut condition
Hi,
I used icctrans to check the gamut of some profile.
Using WideGamutRGB.icc provided in Win2K I found a strange result.
I inserted the XYZ co-ordinate (0, 0.3, 0.054) that is equivalent to
(0, 0.85, 0.3) in xyY. This xyY is outside of the xy chromaticity diagram
but iictrans report a valid RGB (not the out-of-gamut value).
Is this correct?
Thanks,
Andrea
E:\lcms-1.14\bin>icctrans -t1 -i*XYZ -o*sRGB -g -p WideGamutRGB.icc
little cms ColorSpace conversion calculator - v1.8
Enter values, 'q' to quit
X? 0
Y? 0.3
Z? 0.054
R=0.01 G=189.16 B=28.65
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