Thanks Gerhard ... while waiting for a reply from xrite I'll try some more variations. One more thing. I'd like to give a big round of applause to this list which I'd count among the three most friendly and helpful OSS mailing lists I've come across. Thanks, Karl -----Ursprüngliche Nachricht-----
Von: Gerhard Fuernkranz <nospam456@xxxxxx> Gesendet: 13.6.'09, 11:31 Karl Beckers wrote:so what you're saying here is that if increased the color temperature rather than decrease it, at some point the sRGB gamut would fit into the monitor's gamut (provided the latter is large enough in the first place)? I could try that. I just assumed picking the sRGB preset on the display and keeping the native whitepoint in argyll (like with no -t) would give me the max gamut volume, but maybe I should try factory default rather than sRGB.The problem with LCD displays is again and again that one does not know what the controls and presets really do. Factory defaults are indeed often a good starting point. At least the shape of one of the gamuts you have posted does not look sane (rather a plateau on top, instead of a peak) - I guess that some clipping was in the play here. If you anyway want to calibrate and profile the display, then I'd rather suggest not to enable an emulation mode like sRGB, where the monitor will do an additional (unknown) color transformation internally (which can only reduce, but never increase its native gamut). Rather try to operate the display as native as possible [I'm not cursing functionality like sRGB emulation mode in general, some high-end display do this job pretty well, emulating a nearly perfect virtual sRGB display, but some consumer-grade displays rather don't]. Regarding color temperature: The (absolute) chromaticities of the display's RGB primaries are fixed and you can't change them. The only thing you can change is basically the whitepoint (i.e. the intensity ratios between the three channels). Assuming a white point relative transformation from sRGB to the display color space, there will certainly exist an "optimal" display white point which will maximize the intersection between the white point adapted sRGB gamut and the gamut of the display - but you have to find it (and you'll have to define in which color space you want to maximize the intersection, since this will give different results). Also note, if the display white point deviates too much from the blackbody or daylight locus, then (depending on the viewing environment) your eyes may no longer be able to adapt well enough to the display white point and you may perceive "white" as green-ish or magenta-ish, which will constrain the choice of the white point additionally. Regards, Gerhard