[argyllcms] Strange results on a projector

  • From: Frédéric <frederic.mantegazza@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Tue, 19 Feb 2008 09:20:49 +0100 (CET)

Hello,

We are trying to cailbrate a projector which will be used for a national
contest of artisitic slideshows (the french workd is "diaporama"; this
is really nice slideshows, with music, story...). This projector belongs
to the room where the contest will take place, so we don't have easy
access. We made tests yesterday, and will only be able to do one more
test.

Slideshows can't do full color management, ie they don't use profiles
to make conversions between image space to projector space. So, the only
tuning we can do is hardware (including LUT). So, yesterday we used
dispcal/dispwin.

But we got very bad results (not argyll fault!). After the LUT is loaded,
there is no color cast in grey scale, but when looking at slideshows,
there are very bad colors: images often have a green color cast,
especially human skin tones, which looks hugly.

Do you know why we obtain such bad results? Could it be a mixing color
problem from the projector? I mean near grey colors, all is fine, but
other colors are not OK. Is it a know issue with LCD projectors? Is
there a way to correct this with argyll, without color space conversion?

Thanks,


--
   Frédéric

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