[argyllcms] Re: R: Re: Hints to profile my DSLR camera
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 05 Jan 2010 12:10:59 +1100
Umberto Guidali wrote:
just a litte question: is it enaught the "classic" 24 clolor colorchecker
Xrtite (colorchecker passport) in order to have a good profile?
It depends on what sort of profile your are trying to make. You might be
able to make a satisfactory matrix type profile with the very small
number of steps, but there simply aren't enough patches to have
confidence in a cLUT type profile.
About sacanin command I must use the colorchecker.cht stored in \argylll\ref
in scanin command as a regogin file? And last where I can find a reference
file for my colorchecker passport that describe the right values for the
color paths?
Good question. Ideally you would measure your particular chart with an
instrument, and use that. In argyll/ref there should be a ColorChecker.cie that
has the Gretag reference/aim values for the chart, but I notice that
it is missing from the distribution, so I've attached it to this email.
You could also check <http://www.babelcolor.com/main_level/ColorChecker.htm>
which has a lot of information.
cheers,
Graeme Gill.
IT8.7/2
ORIGINATOR "Graeme Gill, ArgyllCMS from Gretag Macbeth reference"
DESCRIPTOR "ColorChecker 24"
CREATED "Feb 18, 2008"
MANUFACTURER "X-Rite/Gretag Macbeth"
NUMBER_OF_FIELDS 4
BEGIN_DATA_FORMAT
SAMPLE_ID LAB_L LAB_A LAB_B
END_DATA_FORMAT
NUMBER_OF_SETS 24
BEGIN_DATA
A01 37.99 13.56 14.06
A02 65.71 18.13 17.81
A03 49.93 -4.88 -21.93
A04 43.14 -13.10 21.91
A05 55.11 8.84 -25.40
A06 70.72 -33.40 -0.20
B01 62.66 36.07 57.10
B02 40.02 10.41 -45.96
B03 51.12 48.24 16.25
B04 30.33 22.98 -21.59
B05 72.53 -23.71 57.26
B06 71.94 19.36 67.86
C01 28.78 14.18 -50.30
C02 55.26 -38.34 31.37
C03 42.10 53.38 28.19
C04 81.73 4.04 79.82
C05 51.94 49.99 -14.57
C06 51.04 -28.63 -28.64
D01 96.54 -0.43 1.19
D02 81.26 -0.64 -0.34
D03 66.77 -0.73 -0.50
D04 50.87 -0.15 -0.27
D05 35.66 -0.42 -1.23
D06 20.46 -0.08 -0.97
END_DATA
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