Re: Neutral grey under different lighting
Re: Neutral grey under different lighting
- Subject: Re: Neutral grey under different lighting
- From: Nov06 <email@hidden>
- Date: Mon, 3 Sep 2007 12:55:15 +0200
Thanks for all the replies. I'll try to summarize the points below.
The whole thing started as I was asking myself whether I should send
the lab files in Adobe RGB or already converted into their profile,
so I sent them several gradients to see whether there is a
difference. Moreover, I noticed that on some images white areas would
sometimes tend to pink (I only later realised that sometimes meant,
'when viewed under fluorescent light'). This was particularly
annoying when white clouds turned pinkish.
- My input:
I created files defined in Adobe RGB with a large number of vertical
bars starting at (0 0 0) increasing in steps of four, ie, (4 4 4)
going up to (255 255 255). The whole range was split over several
files, as to not having to make the bars too narrow.
- My daylight:
Indirect sunlight, ie, overcast sky, or in in a room not directly
exposed to the sun, or in a room behind blinds.
- About spectras:
I only have the Eye-One Display with the Eye-One Match 3 software, so
no spectra.
- Perfectly neutral:
Perfect in the sense that to the casual observer they would appear as
neutral grey or only slightly warm or cold regardless of viewing
conditions and perfect in the sense that bright areas don't have a
different cast as dark areas. (This what I am used to from b/w
photographic paper, as I said I did not expect color photographic
paper to match this fully.)
- The paper used:
Fujicolor Crystal Archive Paper Supreme
- The profile:
LGOROWLENGTH 34
CREATED "5/4/2006" # Time: 15:14
INSTRUMENTATION "eye-one"
MEASUREMENT_SOURCE "Illumination=Unknown ObserverAngle=Unknown
WhiteBase=Abs Filter=Unknown"
ILLUMINATION_NAME "D50"
OBSERVER_ANGLE "2"
Version = "ProfilingLib 5.0.0 1.75 Apr 1 2005"
ProfilerType = 1
GopMode = false
ProfileSize = 2
UseLinearization = 1
Perceptual = 1
ViewingConditionName = "D50"
ViewingCondition = "[24.5, 29.88, 49.32, 56.53, 60.05, 57.83, 74.84,
87.26, 90.62, 91.38, 95.12, 91.97, 95.73, 96.62, 97.13, 102.1,
100.76, 102.32, 100, 97.73, 98.92, 93.5, 97.68, 99.27, 99.04, 95.72,
98.85, 95.66, 98.18, 103, 99.13, 87.37, 91.6, 92.88, 76.85, 86.5];"
Options = {
GamutMappingMethod = "NewGamutMapping L0.3"
Copyright = "Copyright by LOGO GmbH, Steinfurt"
CopyPerceptualToColRI = "1"
CompensateFluorescence = "1"
}
Best,
Markus
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