[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.


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