Re: ColorSync monitors
Re: ColorSync monitors
- Subject: Re: ColorSync monitors
- From: Henrik Holmegaard <email@hidden>
- Date: Mon, 18 Dec 2000 08:09:44 +0100
In order to
create a profile with a colorimeter, don't you have to calibrate it
with the same colorimeter first? And if that calibration is on top of
the Colorsync calibration you're back in the catch 22 about how to
disable the colorsync calibration.
No, it's not the make of the colorimeter that makes the calibration,
it's the software that drives the colorimeter that makes the
calibration.
Some monitor color management software doesn't calibrate, it solely
characterizes, for instance, Viewopen4.
Some monitor color management software both calibrates and
characterizes, for instance, ProfileMaker3X or Optical.
The pros and cons of calibrating in software, in hardware, and at
different bit depths can be debated (and they certainly are -:)).
The way the Apple monitors are built, a package that both calibrates
and characterizes isn't able to fully control the calibration, not
even ProfileMaker.
Instead of trying to take the Mac apart, you are better off allowing
the Apple DigitalColor technology to calibrate, and then characterize
that calibration in a third party, high-end monitor color management
package.
The Apple DigitalColor technology will when you calibrate also create
a characterization, that is, a profile. This profile will replace any
Apple or third party profile set in Monitors and ColorSync. Which
means you must revisit Monitors and reset to your new profile.
Be aware that your third party profile *must* contain the Video Card
Gamma Tag (VCGT) introduced with ColorSync 2.5.
If the profile does not contain this tag, you will be in trouble when
selecting it in the Monitors control panel.
Both ProfileMaker 3X and Viewopen4 contain the VCGT LUT.
Using a third party monitor color management package will let you
choose between describing the monitor with a matrix or a LUT profile.