For an IT8.7/2 chart, this is the
ref/it8.cht
file supplied with Argyll, and the manufacturer will will supply
an
individual or batch average file along with the chart containing
this
information, or downloadable from their web site.
For the ColorChecker 24 patch chart, the
ref/ColorChecker.cht file
should be used, and there is also a
ref/ColorChecker.cie
file provided that is based on the manufacturers reference values for
the chart. You can also create your own reference file using an
instrument and chartread, making use of the chart reference file
ref/ColorChecker.ti2:
chartread -n -a
ColorChecker.ti2
Note that due to the small number of patches, a profile created from
such a chart is not likely to be very detailed.
For the ColorChecker DC chart, the
ref/ColorCheckerDC.cht file
should be used, and there will be a ColorCheckerDC reference
file supplied by X-Rite/GretagMacbeth with the chart.
The ColorChecker SG is relatively expensive, but is preferred by many
people because (like the ColorChecker and ColorCheckerDC) its colors
are composed of multiple different pigments,
giving it reflective spectra that are more representative of the real
world, unlike many other charts that are created out of combination of
3 or 4 colorants.
I don't recommend
buying the ColorChecker SG chart at the present time, since the
manufacturer doesn't
provide any CIE reference information for it, making it relatively
useless for creating profiles unless you are using X-Rite software to
do so. [There was a suggestion in December 2009 That X-Rite will
address this issue by making the reference information available on
their Website, but at the time of writing, this hasn't happened yet]
If you do happen to have access to the ColorChecker SG reference
information, or you have measured it yourself using a color instrument,
then you may need to convert the reference information from spectral
ColorCheckerSG.txt file to CIE value
ColorCheckerSG.cie
reference file,
follow the following steps:
logo2cgats
ColorCheckerSG.txt ColorCheckerSG
spec2cie
ColorCheckerSG.ti3 ColorCheckerSG.cie
For the Eye-One Pro Scan Target 1.4 chart, the
ref/i1_RGB_Scan_1.4.cht
file should be used, and as there is no reference file accompanying
this chart, the chart needs to be read with an instrument (usually the
Eye-One Pro). This can be done using chartread, making use of the
chart reference file
ref/i1_RGB_Scan_1.4.ti2:
chartread -n -a
i1_RGB_Scan_1.4
and then rename the resulting
i1_RGB_Scan_1.4.ti3
file to
i1_RGB_Scan_1.4.cie
For the HutchColor HCT chart, the
ref/Hutchcolor.cht file
should be used, and the reference
.txt
file downloaded from the HutchColor website.
For the Christophe Métairie's Digital TargeT 003 chart with 285
patches, the
ref/CMP_DT_003.cht
file
should be used, and the cie reference
files
come with the chart.
For the Christophe Métairie's Digital Target-3 chart with 570
patches, the
ref/CMP_Digital_Target-3.cht
file
should be used, and the cie reference
files
come with the chart.
For the LaserSoft DCPro chart, the
ref/LaserSoftDCPro.cht
file should be used, and reference
.txt
file downloaded from the
Silverfast website.