Thanks for the response. I gathered that the file format was a
bit different, but from the googling around (and the "user-supplied
measurement sheet in lprof"), it appeared that this sort of stuff was done
before. I thought maybe it was a spec2cie kinda function.
I did grab the CVS for lprof awhile back (and just now see a
'spec2cielprof' function in it?). It does see my instrument and appears
to work. I found the initial adjustments (black level, white level, etc)
for the seemed out of whack (contrast had to be brought way down, etc). I
guess in retrospect, much of this was my own ignorance at the time...
setting the maximum brightness down from 80 cd/m^2, turning off the
ambient lights in the room, etc. Since I first played with that and
temporarily gave up, I figured out how to do it from argyll. I was just
thinking that using a set of measurements from argyll with the nice gui
(and ability to store the raw data in the generated profile for viewing
the sampled gamut with iccexamin) might be convenient.
I guess one should probably stick with one or the other at this
point. I'm glad to see that lprof hasn't died... just gone into
publicly-apparent slumber in the CVS.
Cheers,
-Cory
On Fri, 14 Dec 2007, Hal V. Engel wrote:
> On Thursday 13 December 2007 06:36:28 Cory Papenfuss wrote:
>> Hey all. I've recently purchased a DTP-92Q and gotten it to work
>> on my Centos5 box. I've successfully adjusted, calibrated, and profiled
>> my monitor using Argyll. I'd like to try to use the measurement sheet
>> created by Argyll (a .ti3 file) in lprof, but when I try to load it lprof
>> barfs on it. Is there a conversion that's necessary to an it8 file to
>> load it?
>>
>> Thanks,
>> -Cory
>
> Cory,
>
> Although both LProf and ArgyllCMS create and use CGATS files there are
> differences between the ArgyllCMS and LProf measurement sheets in terms of
> how the data is represented. Also the CGATS code in ArgyllCMS and LProf is
> different and ArgyllCMS does put some things in some of it's CGATS files that
> LProf does not handle very well.
>
> Actually LProf CVS should work fine with the DTP-92Q to generate it's own
> measurement and calibration sheets as well as creating profiles with a VCGT.
> I have tested it with a serial DTP-92 as well as a Huey, EyeOne Display 2/Lt
> and a Spyder 2. It should also work with the DTP-94, EyeOne Display, EyeOne
> Pro and SpectroLino meters as well. But as far as I know these are untested
> at this point.
>
> However the algorithms used to create the video card LUT calibration curves
> and to do the display profiles in LProf are currently on the simplistic side
> compared to ArgyllCMS. But these will still result in significant
> improvements to the display calibration for most users as well as useful
> display profiles.
>
> As a side note for those interested in getting a measurement device my current
> recommendation for those who want to do this but also want to minimize the
> cost is to get a Huey (around $50 plus shipping on ebay). This device works
> nicely with both LProf and ArgyllCMS and only has a few minor issues. The
> most significant of these is that it can give false readings of dark patches
> when there are high levels of ambient light. The solution is to calibrate
> and profile in a dim or dark room. The other issue is that the ambient
> light sensor does not correctly report the color temperature and always
> reports 5001K no matter what kind of light you are sampling. Of the meters I
> have tested I like the EyeOne 2/Lt the best but it is more expensive than the
> Huey. Since ColorVision has a very bad attitude toward the open source
> community you should stay away from their products.
>
> Hal
> LProf Project Lead
>
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--
*************************************************************************
* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
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