lee scratchy wrote:
1)I've seen that ARGYLL supports the HCFR colorimeter, but it doesn't seem to take reference\
> files(.thc) in account.....so how can I find out the right R/G/B mix ? I can't say I really understand what the HCFR folks are doing with their reference files. It doesn't make any sense to me that they can "calibrate" an instrument without an independent reference of some sort. So what I've done with my driver is to hard code a reference of the particular HCFR I have into the software. The reference was created by calibrating against an X-Rite DTP94 on two particular displays. The validity of this calibration depends greatly on the uniformity of manufacture of the optical sensor, and the similarity of the spectral characteristics of the displays to what is actually being measured. Without some sort of manufacturers factory calibration for each HCFR instrument, I don't see what else can be done for it.
AFAIK this unit is worthless without .thc files, which basically enables to find
> the proper white temperature You'll have to explain how this is supposed to work.
2)I'm expecting to receive a Eye One Display LT unit. in the Gretag SDK and in the HCFR software, they ask you to put the unit in a bag in
> order to "calibrate" the unit for LCD, and on a white background for CRT. These are just black level and frequency calibrations. As I understand it, the Eye-One Display 2 and LT are not meant to need black calibration to the same degree as the older Eye-One Display 1, and the factory black calibration is meant to suffice.
I've been told that the Eye One were giving more precise measurements thanks to this
> unit calibration required prior to each session. I'm not sure where you got this information. It doesn't agree with the information I have seen about the Display 2 and LT. Graeme Gill.