Question about Eizo's ColorNavigator

[Damien Symonds]

I've always used the Eye-One Match software that comes with the Eye-One Display II.

Recently I bought an Eizo, and, of course, calibrated it using the ColorNavigator software and the EODII.

I'm intrigued - how can ColorNavigator create an accurate profile without using the wide range of colour patches that Eye-One Match does? ColorNavigator only displays shades of grey, then red, green and blue, whereas EOMatch shows oranges, purples, browns, etc as well.

I'm not doubting the quality of the ColorNavigator profile (in fact, I've tried both and the profiles are visually indistinguishable), I am just curious about the "anatomy"of a profile, I guess.

 

[Damien Symonds]

Ok, can somebody at least tell me why ColorNavigator saves its profiles as ".icm" whereas the Eye-One profiles are ".icc"? Is there a significant difference?

Also, I've been dabbling with Xrite's DisplayProfile app, as a workaround for the ubiquitous Vista calibration problems. I've found that DisplayProfile doesn't recognise the ColorNavigator icm profile as a legitimate display profile, because it doesn't contain a "gamma table tag".

So this "gamma table tag" is obviously something that's built in to Eye-One's .icc profiles, but not present (or not recognised) in the CN .icm profiles. Does anybody know what it is?