[argyllcms] Re: camera profiling with newest version of Argyll

  • From: Chad Johnson <chad.chadjohnson@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 27 Aug 2015 11:27:56 -0400

I certainly white balance my camera but these files have nothing to do with the camera which comes along at a later step. The ti3 file is from chartread (so the only data is from the colormunki) and the cie file is from running spec2cie on the ti3 file and the spectrum file.

The odd spectrum is due to the light source which is fluorescent and is partly what I'm trying to calibrate (ie. at the end of the day the calibration is for the lightsource + camera). I've attached the spectrum for your reference.

My equipment is not counterfeit. Ridiculous!

Chad

On 8/27/15 11:18 AM, Ben Goren wrote:

On Aug 27, 2015, at 8:13 AM, Chad Johnson <chad.chadjohnson@xxxxxxxxx> wrote:

Thank you for that observation. I have no idea how to adjust the white-balance
-- my device is an xrite ColorMunki Design.

You'd adjust the white balance when you develop the RAW file coming out of the camera. If
you did the usual eyedropper-click on this patch, that would explain it...that would only
get you close with something with a truly flat spectrum -- something nonexistent, with
"good enough" approximations rare and typically very expensive (with some
notable exceptions for the homebrew approach).

The chart is an xrite Color Checker SG so I highly doubt it has a whitening
agent applied to it.

Are you sure it's an actual X-Rite product, and not a counterfeit?

b&

SPECT

DESCRIPTOR "Argyll Spectral power/reflectance information"
ORIGINATOR "Argyll CMS"
CREATED "Sun Aug 23 14:39:02 2015"
SPECTRAL_BANDS "106"
SPECTRAL_START_NM "380.000000"
SPECTRAL_END_NM "730.000000"
SPECTRAL_NORM "1.000000"

NUMBER_OF_FIELDS 106
BEGIN_DATA_FORMAT
SPEC_380 SPEC_383 SPEC_387 SPEC_390 SPEC_393 SPEC_397 SPEC_400 SPEC_403
SPEC_407 SPEC_410 SPEC_413 SPEC_417 SPEC_420 SPEC_423 SPEC_427 SPEC_430
SPEC_433 SPEC_437 SPEC_440 SPEC_443 SPEC_447 SPEC_450 SPEC_453 SPEC_457
SPEC_460 SPEC_463 SPEC_467 SPEC_470 SPEC_473 SPEC_477 SPEC_480 SPEC_483
SPEC_487 SPEC_490 SPEC_493 SPEC_497 SPEC_500 SPEC_503 SPEC_507 SPEC_510
SPEC_513 SPEC_517 SPEC_520 SPEC_523 SPEC_527 SPEC_530 SPEC_533 SPEC_537
SPEC_540 SPEC_543 SPEC_547 SPEC_550 SPEC_553 SPEC_557 SPEC_560 SPEC_563
SPEC_567 SPEC_570 SPEC_573 SPEC_577 SPEC_580 SPEC_583 SPEC_587 SPEC_590
SPEC_593 SPEC_597 SPEC_600 SPEC_603 SPEC_607 SPEC_610 SPEC_613 SPEC_617
SPEC_620 SPEC_623 SPEC_627 SPEC_630 SPEC_633 SPEC_637 SPEC_640 SPEC_643
SPEC_647 SPEC_650 SPEC_653 SPEC_657 SPEC_660 SPEC_663 SPEC_667 SPEC_670
SPEC_673 SPEC_677 SPEC_680 SPEC_683 SPEC_687 SPEC_690 SPEC_693 SPEC_697
SPEC_700 SPEC_703 SPEC_707 SPEC_710 SPEC_713 SPEC_717 SPEC_720 SPEC_723
SPEC_727 SPEC_730
END_DATA_FORMAT

NUMBER_OF_SETS 1
BEGIN_DATA
8.067034 8.067034 8.067034 8.067034 8.067034 8.067034 8.067426 13.48183
13.44205 9.167207 6.354513 6.334833 8.311258 11.51454 19.07441 40.69341
78.64628 100.6327 83.09818 55.49033 44.81882 45.03758 47.53791 49.83969
52.07461 53.75885 54.86310 56.02378 57.28636 58.31631 59.88960 63.55504
68.09614 70.11113 68.51564 64.78410 60.47882 56.36404 52.89218 50.12560
47.59055 44.80379 41.80658 38.94805 36.67939 35.16693 35.58884 43.42167
71.36867 120.5639 144.7593 105.6666 51.69510 29.92962 23.83782 22.02818
21.80619 23.93501 33.43842 49.18418 56.00825 49.88690 44.37804 43.60597
42.96820 43.06079 44.88460 47.87167 51.48186 55.49037 59.90462 64.43078
67.94656 68.85365 67.39482 65.33594 63.49065 61.84529 60.18879 58.39489
56.19443 53.60640 50.75151 47.89093 45.10455 42.42791 39.68885 36.83592
33.99127 31.29559 28.83133 26.49972 24.31868 22.36582 20.54552 18.72777
17.02234 15.52516 14.23720 13.06922 11.93876 10.92666 10.05915 9.314738
8.636570 7.986622
END_DATA

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