[argyllcms] using ARGYLL on a DLP projector
- From: lee scratchy <leescratchy@xxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Sun, 13 Jan 2008 19:32:11 +0000
hey guys,
here's a bit of background on my experiments.
I used to run the HCFR hardware with their software on several projectors.
I've included 3 .CHC files that need to be opened in their
software(http://www.homecinema-fr.com/colorimetre/release/Setup_v1_2_2.exe).
they have 2 .THC definition files available for my HC3100, one made with a s2,
the other with an i1....but both of them were exhibiting a major green excess
in grey levels patterns.
I find this sensor pretty much useless because of this limitation, because
there's no such thing as a definition file that can 'fit' all the projector of
the same model IMVHO.
to get more of less OK levels, I had to lower the green channel quite a bit on
the projector ...at this time I wasn't using ARGYLL(see i1---hcfr.chc)
so I switched to the spyder2 + ARGYLL, which was a major improvement, mainly
because the From: frederic.mantegazza@xxxxxxxxxxx
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Re: Calibrate a HCFR hardware
> Date: Sun, 13 Jan 2008 19:52:13 +0100
>
> On dimanche 13 janvier 2008, Graeme Gill wrote:
>
>> Basically I create a set of test patch values, measure them with
>> the HCFR and some reference instrument (ie. am i1d2 or a i1pro etc.),
>> and then compute a matrix that best maps the HCFR raw RGB values to
>> the XYZ. The matrix is only optimal for the particular instruments
>> and display used to show the test values of course.
>>
>> I wrote a small utility to take in two .ti3 files and emit
>> the appropriate matrix. I think for the Argyll HCFR driver
>> I used the DTP94 as reference, and my particular (Hitachi) CRT
>> and my Mac laptop for the LCD references.
>> You would #define MEASURE_RAW in hcfr.c to output raw
>> RGB instead of XYZ to capture in the .ti3 file.
>> The .ti1 would be some selection of primaries, secondaries
>> and other test values.
>
> How do I integrate the xyzfix resulting matrix in the hcfr.c code? What are
> xmat and tmat in this file?
>
> In what order do I have to call the .ti3 files in xyzfix?
>
> BTW, as I can't make HCFR colorimeter work under linux, could send be a
> pre-compiled version of dispwin (I guess I only need this one) compiled
> with #define MEASURE_RAW, for windows (I'll make the calibration under
> this OS)?
>
> Thanks,
>
> --
> Frédéric
>
> http://www.gbiloba.org
>
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