[argyllcms] Re: ArgyllCMS V1.3.0 has been released.

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 09 Sep 2010 16:49:35 +1000

Konstantin Pyanzin wrote:
New "ccmxmake" utility and new "-X" option for spotread/dispcal/dispread are 
But I think that a database of contriibuted correction matrices is ineffective,
taking into account bad inter-instrument agreement for colorimeters.

Well, frankly, I'm pessimistic as to the usefulness (mainly due to the fact
that few people are in a position to make the matrices, and they have little
motivation to do so), but I thought that rather than second guessing, I'd put
it out there and see what happens.

There's not a whole lot to be done about intra-instrument agreement (meaning
agreement between different instances of the same make and model), but perhaps
ccmx's can be useful "on average" none the less.

Technically, a more sophisticated approach would be to characterize
the spectral sensitivities of each type of colorimeter, and then
only the spectral characteristics of the display colorants would be needed
to be able to calculate the necessary correction matrices. The advantage
is that only one measurement is needed per display, and the measurer
doesn't have to have any or all of the colorimeters, just a spectrometer.
The problem is that instruments to measure spectral sensitivities aren't easily
come by, and are generally very expensive.

Graeme Gill.

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