I still don't understand the so-called „color decoding issue”. My Pana G30E has relatively good and significantly better color accuracy than my Samsung D550 had. 2012 won't be very different except the VT50. 75% saturated pattern? I never heard about such thing. On the other hand, 75% stimulus is very common for HDTV calibration. 2012/3/21, Kristian Jörg <krjg@xxxxxxx>: > Graeme Gill skrev 2012-02-13 14:41: >> Kristian Jörg wrote: >>> Well, the reason I was a bit unimpressed is because this is supposed to >>> be one of the very best TV >>> sets to buy, and it includes full ISF controls for managing grayscale at >>> 10% stimulus steps. Color >>> however is only at 100% stimulus. So I can nail in the grayscale and >>> gamma to mostly perfect result >>> (according to the patterns used, i.e full windows cause lightness to drop >>> a bit). Color however >>> seems a bit more difficult. Now it is possible I have used the CP >>> software wrongly at the 75% color >>> intensity. It has a 75% Rec. 709 setting that I assumed should be used >>> for the 75% W+ 75% RGB >>> measurements. But maybe I should measure all those at 100% Rec. 709 >>> setting since i assume the Rec >>> 709 standard is linear? When using 75% patterns all that happens is that >>> luminocity falls a bit, >>> but it is all realite to white which is measured as a baseline... ? >> I'm afraid I have to smile a bit at all that. Rec 709 is an idealised >> additive display. >> Idealised displays have a perfect black, something no real display can >> achieve. >> So (as usual) you are faced with the issue of how do you deal with the >> non-perfect black, >> given that the transfer curve assumes that is is perfect. Non-LCD based >> displays are not >> so bad in this regard though. Then there are the viewing condition >> assumptions inherent >> in Rec 709. >> >> The channel combination targets aren't too hard to compute - add the XYZ >> of the individual channel >> target or measurement values, since Rec 709 is additive. >> >> Graeme Gill. > > Just a short follow up to this little thread that I started. It was all > due to a misunderstanding of what patterns to use for the 75% Rec 709 > calibration settings in Chromapure. It should be 75% saturated, not 75% > intensity. With correct patterns my results where correct. However if > anybody tries this, there is a confirmed bug with it with at least > version 2.0.10 (and probably 2.0.11) in CP, so wait for the next release > before trying this. > > And there is also strong indication of color decoding issues in the 2011 > models of Panasonic plasmas. Something that should be fixed in the 2012 > models. Bummer. There will not be a fix to the 2011 models, or even any > more firmaware updates at al,l according to those who "know". > > /Kristian > > >