[argyllcms] Re: More questions about monitors
- From: "Hal V. Engel" <hvengel@xxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 3 Apr 2009 12:27:42 -0700
On Friday 03 April 2009 03:51:37 am Graeme Gill wrote:
> Alexandre Prokoudine wrote:
> > Maybe we could get you a display the way we got you Spyder3 and
> > ColorMunki? :)
>
> Yes, but which display - there are many with internal LUTs, all different:
> EIZO, NEC, HP, Samsung, and probably others I can't recall off
> the top of my head. (The HP at least has some documentation in the form
> of source code.)
>
> Graeme Gill.
At one point there were only two vendors that supplied the chip sets used in
these LCD monitors. This may have changed recently but there is a possibility
that the protocols used by these vendors only have a few variations. Of
course the issue is that the VESA DDC/CI prototcol does not include these LUT
functions. As a result all of these vendors are using proprietary extensions
that are undocumented so there is no way to know for sure how similar the LUT
protocols are between vendors or even various models from the same vendor.
Graeme is correct that HP has supplied some source code related this for the
DreamColor monitor. This source code is open source (MIT license) and is
available on sourceforge.net at http://sourceforge.net/projects/ookala-mcf .
There is only a snap shot of the code there and there is no public CVS/SVN/GIT
repository available. The sourceforge project was created Dec.15 2008 and the
code snapshot was uploaded Dec 19 and that has been the only activity for this
project. There have been at least some attempts to contact the project admin
but he has been unresponsive.
Hal
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