.ti1 Customizer

Note: as of version 1, the following has been incorporated into The Little Argyll GUI.

Custom patch sets may be created for the Argyll Color Management System and incorporated into .ti1 files created by the patch generator, targen. The RGB color data format is

where the RGB values are the actual input, and calculated XYZ values are used for a number of other purposes.

The following script will convert the RGB-XYZ output of xicclu to .ti1 entries and add them to an existing .ti1 file. It can also convert raw Lab or RGB values, but the xicclu method is recommended as it more accurately targets the device’s response.

Enter custom color values. Duplicates (based on the integer RGB values) will be removed.

Value type: xicclu output (recommended) Lab RGB

xicclu output has the form:

58.675717 40.085306 15.008152 [RGB] -> Lut -> 21.026675 21.374979 11.935363 [XYZ]

Lab or RGB values should be separated by white space and/or commas, one per line, such as:

50 0 0

L range is 0 to 100; a and b, -128 to 127; and RGB, 0 to 100 (not 255).

58.675717 40.085306 15.008152 [RGB] -> Lut -> 21.026675 21.374979 11.935363 [XYZ] 71.652754 56.416608 35.653835 [RGB] -> Lut -> 28.778480 29.255191 16.335517 [XYZ] 76.339029 66.450596 52.010820 [RGB] -> Lut -> 35.350041 36.200471 23.417310 [XYZ] 81.279705 75.138741 64.712034 [RGB] -> Lut -> 42.527576 43.797954 31.607755 [XYZ] 85.938228 81.956786 74.607077 [RGB] -> Lut -> 50.298211 52.033846 40.870341 [XYZ] 90.419250 88.125025 83.366108 [RGB] -> Lut -> 58.650605 60.895950 51.174791 [XYZ]

Enter the text of a .ti1 file:

CTI1 DESCRIPTOR "Argyll Calibration Target chart information 1" ORIGINATOR "Argyll targen" CREATED "Fri Feb 17 16:30:00 2017" APPROX_WHITE_POINT "95.106486 100.000000 108.844025" COLOR_REP "iRGB" 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 0 BEGIN_DATA END_DATA CTI1 DESCRIPTOR "Argyll Calibration Target chart information 1" ORIGINATOR "Argyll targen" DENSITY_EXTREME_VALUES "8" CREATED "February 17, 2017" NUMBER_OF_FIELDS 7 BEGIN_DATA_FORMAT INDEX RGB_R RGB_G RGB_B XYZ_X XYZ_Y XYZ_Z END_DATA_FORMAT NUMBER_OF_SETS 8 BEGIN_DATA 0 100.0000 100.0000 100.0000 95.10649 100.0000 108.8440 1 0.00000 47.36069 100.0000 25.61297 21.62916 97.37627 2 100.0000 0.00000 79.35138 52.42580 26.28975 58.72152 3 0.00000 0.00000 58.99714 6.485834 3.193987 29.89445 4 100.0000 66.65930 0.00000 56.05879 50.50543 7.656144 5 0.00000 35.60114 0.00000 4.685619 8.370208 2.228550 6 84.44436 0.00000 0.00000 28.84279 15.35583 2.304665 7 0.00000 0.00000 0.00000 1.000000 1.000000 1.000000 END_DATA CTI1 DESCRIPTOR "Argyll Calibration Target chart information 1" ORIGINATOR "Argyll targen" DEVICE_COMBINATION_VALUES "9" CREATED "February 17, 2017" NUMBER_OF_FIELDS 7 BEGIN_DATA_FORMAT INDEX RGB_R RGB_G RGB_B XYZ_X XYZ_Y XYZ_Z END_DATA_FORMAT NUMBER_OF_SETS 9 BEGIN_DATA 0 100.0000 100.0000 100.0000 95.10649 100.0000 108.8440 1 0.00000 100.0000 100.0000 54.27632 78.94783 106.9308 2 100.0000 0.00000 100.0000 59.70128 29.19948 97.04219 3 0.00000 0.00000 100.0000 18.87111 8.147314 95.12896 4 100.0000 100.0000 0.00000 77.23538 92.85269 14.71507 5 0.00000 100.0000 0.00000 36.40521 71.80052 12.80184 6 100.0000 0.00000 0.00000 41.83017 22.05217 2.913230 7 0.00000 0.00000 0.00000 1.000000 1.000000 1.000000 8 50.00000 50.00000 50.00000 21.14266 22.19007 24.08306 END_DATA

Convert

Combined .ti1 file:

The default RGB-XYZ conversion profile for .ti1 files created without a pre-conditioning profile is sRGB with a black point of (1, 1, 1). Values which are run backward through a pre-conditioning device profile, as targen does, are more accurate. xicclu duplicates this process and allows the specification of custom colors.

D55.zip, custom spectrum files for specifying the D55 (5500 K) illuminant when using colprof to create a printer profile.