[argyllcms] Re: Compatibility with i1 (Eye One) Display Pro 3 retail and OEM?

  • From: Kristian Jörg <krjg@xxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 01 Feb 2012 09:31:46 +0100

Graeme Gill skrev 2012-01-31 23:30:
Kristian Jörg wrote:
Must say that this is a steep learning curve for sure. Why would I need to measure the display
spectra to calibrate the meter when the goal of my calibration is to calibrate the display. Seems
like a catch-22 to me...
All instruments need calibration against higher standards. Colorimeters
do not have perfect standard observer filters (this is the real world),
and they will have manufacturing unit to unit variation as well.
So by using a spectrometer it's possible to calibrate the colorimeter
for your particular displays spectral characteristics. Because the i1d3
ships with it's sepctral sensitivity curves, it's possible to calibrate
the i1d3 against a display by simply measuring the displays spectral
output (that's what the .edr & .ccss files contain), rather than the
particular instrument to display matrix that is all that is possible
with other colorimeters.

If I understand correctly. The measurements of the particular display with a spectrometer will give me a .edr/.ccss profile for that display.
The i1d3 meter is not part of those measurements. I.e the .edr/.ccss files could be used for any colorimeter to help it calibrate a display better with respect to how the human eye interprets the results. Is this correct?

In that case why do they claim that they have calibrated the individual i1d3 meters against each of the supported displays with the help of a reference spectrometer. Something here is not making sense.  Probably because I have still not understood it all in depth...


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