Graeme,
here is bit of a ti1 file generated by targen. I've tried to convert
line 1 XYZ value to its RGB counterpart and vice-versa using the
Lindbloom calculator here (http://www.brucelindbloom.com/) and I can't
get the same result as targen give here. I also tried by other means but
all I have is based on Lindbloom equations.
The closest I get is 0.950470, 100, 1.088830, this using D65 ref white
and RGB 1 1 1 on the calculator.
Any idea why?
Any suggestion on which profile and parameter to use with xicclu maybe
to generate the same data as below?
Your suggestion of using this command for generating o sequence of 30
Neutrals from L* 1 to L* 30 doesn't quite get me what I want, yes I get
30 gray patches but from RGB 0 to 1.
targen -d3 -c sRGB.icm -e0 -B0 -f0 -n30 outfile
Thanks,
Yves
CTI1
DESCRIPTOR "Argyll Calibration Target chart information 1"
ORIGINATOR "Argyll targen"
CREATED "Mon Dec 16 07:04:18 2019"
APPROX_WHITE_POINT "95.106486 100.000000 108.844025"
COLOR_REP "iRGB"
WHITE_COLOR_PATCHES "3"
BLACK_COLOR_PATCHES "4"
SINGLE_DIM_STEPS "50"
NUMBER_OF_FIELDS 7
BEGIN_DATA_FORMAT
SAMPLE_ID RGB_R RGB_G RGB_B XYZ_X XYZ_Y XYZ_Z
END_DATA_FORMAT
NUMBER_OF_SETS 184
BEGIN_DATA
1 100.0000 100.0000 100.0000 95.10649 100.0000 108.8440
2 100.0000 100.0000 65.30612 84.09840 95.59746 50.86332
3 100.0000 100.0000 95.91837 93.49182 99.35423 100.3394
4 100.0000 83.67347 100.0000 83.35104 76.49240 104.9255
5 100.0000 4.081633 100.0000 59.81315 29.42319 97.07948
6 100.0000 100.0000 83.67347 89.17282 97.62691 77.59078
