[argyllcms] Re: Direct matching between two displays

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 15 Feb 2012 00:26:00 +1100

Ivan Tsyba wrote:
> But target curve is offsetted by default, so why ideal black system 50%
> input is used instead of offsetted?

I'm not quite sure what you mean. The typical gamma target is for an
ideal system that has a zero black. Real systems aren't like this, so
simply scaling and offsetting the curve for the real black raises
the level, which can lead to a poor match against something with
the same gamma and a lower black level. By making the 50%
point match the ideal system, then the overall contrast
and look will be consistent with the ideal system target,
irrespective of the actual black level.

Graeme Gill.

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