[argyllcms] Re: Eizo Internal LUT access with Argyll?
- From: Sam Berry <samkberry@xxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 18 Oct 2011 15:21:17 +0200
There are some whitepapers about (possibly on Eizo's Global site) regarding
the signal flow in their monitors, but I don't have any good links to hand.
Sorry. The fact that linear data is needed before matrix transformation is
well documented though. Bruce Lindbloom's site has lots of useful data
though, just not specific to monitors:
http://brucelindbloom.com/
Sam Berry
On 18 October 2011 15:09, Matthieu DUBAIL <matthieu.dubail@xxxxxxxxx> wrote:
> Very interesting. Did you found those informations in a white paper?
> So from what I understand, Eizo did changed their internal display LUT from
> 1D LUTS to 3D LUTS. I do understand that Graeme don't want to spend time on
> ever changing proprietary technologies. :)
> thanks!
>
> Matthieu DUBAIL
> matthieu-dubail.com
> Paris, 4ème
>
>
>
> 2011/10/18 Sam Berry <samkberry@xxxxxxxxxxxxxx>
>
>> It's also worth noting that regardless of gradation precision, in-monitor
>> gamut transformation requires linearisation, which means that the monitor
>> must know the input tone curve. A calibration done with LUTs before this
>> stage means that any linearisation performed can only be an approximation.
>> The calibration will also need to be redone for each gamut transformation
>> selection.
>>
>> It should also be noted that modern internal LUT monitors (inc Eizo now)
>> feature 3D LUTs which allow printer colour spaces to be emulated, and I am
>> not aware of any graphics card with similar features at this time. A well
>> specified tone curve is essential for this emulation to be meaningful, and
>> once you have monitor communication too specify it, you may as well use
>> internal LUTs too.
>>
>> Sam Berry
>>
>>
>> On 17 October 2011 16:03, Matthieu DUBAIL <matthieu.dubail@xxxxxxxxx>wrote:
>>
>>> Thanks for the answer.
>>> Anyway, how usefull do you think internal display LUT are? Are they
>>> really superior o video card LUT ? Just wondering
>>>
>>> Matthieu DUBAIL
>>> matthieu-dubail.com
>>> Paris, 4ème
>>>
>>>
>>>
>>> 2011/10/11 Graeme Gill <graeme@xxxxxxxxxxxxx>
>>>
>>>> Matthieu DUBAIL wrote:
>>>> > I was wandering if Argyll can access to Eizo internal monitor LUT
>>>> (Eizo
>>>> > CG211). If so, how?
>>>>
>>>> Hi,
>>>> no, Argyll doesn't access display LUTs.
>>>>
>>>> >>From what I read from the mailing list archives, it can't, but the
>>>> post was
>>>> > 2 years old. Any news?
>>>>
>>>> I don't have a Eizo to reverse engineer, so this is unlikely to change.
>>>>
>>>> Graeme Gill.
>>>>
>>>>
>>>>
>>>
>>
>
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