[argyllcms] Re: Monitor calibration questions
- From: adam k <aak1946@xxxxxxxxx>
- To: "argyllcms@xxxxxxxxxxxxx" <argyllcms@xxxxxxxxxxxxx>
- Date: Thu, 11 Mar 2010 16:50:26 -0500
Can someone tell me what is locus in device report.
Thanks!
Sent by AAK from iPhone 3Gs
On Mar 11, 2010, at 4:20 PM, Jon Leighton <j@xxxxxxxxxxxxxxxxxxxx>
wrote:
> Thanks for this! It worked a dream.
>
> Perhaps that should be the standard setting for LCD profiles in
> dispcalGUI? (Though I say this while having no real understanding of
> why
> it worked better than other things...)
>
> Jon
>
> On Wed, 2010-03-10 at 13:36 -0500, Michel Joly de Lotbinière wrote:
>> I've always had better results on my notebook LCD panel with a 1
>> channel shaper curve matrix profile. No matter what I do
>> (preconditioning the target patches, increasing the number of
>> measurement patches, specifying a gamma close to native response,
>> etc.), I still get faintly warm black values in the grayscale range
>> RGB(3,3,3) to about RGB(30,30,30), whether the CMM is the Windows one
>> or LittleCMS. The grayscale is only entirely neutral when the profile
>> is a single channel matrix/shaper type.
>>
>> The real, recent surprise for me was upgrading to the most up-to-date
>> of ArgyllCMS + Florian Hoech's dispcalGUI: I simply set-up dispGUI to
>> use the high-quality profiling options, D6500, gamma 2.2, the
>> extended
>> patch set (just 80+ patches, I think), and to produce a 1-channel
>> shaper/matrix profile unattended, and when I returned from the
>> supermarket, the result was entirely acceptable, totally easy &
>> trouble-free in bringing the LCD colors to a known, usable state.
>>
>> Hats off to Graeme and Florian! The commercial vendors of
>> user-friendly monitor profiling packages might want to start
>> worrying...
>>
>> On Wed, Mar 10, 2010 at 7:17 AM, Roger Breton <graxx@xxxxxxxxxxxx>
>> wrote:
>>> John,
>>>
>>> Have you tried using your Spyder on another monitor, to see
>>> whether the instrument itself could be introducing a distortion in
>>> the measurements? Or try with another software?
>>>
>>> Roger
>>>
>>>>
>>>> Hi there,
>>>>
>>>> I have been trying to calibrate/profile my monitor with argyll. I
>>>> have a
>>>> Colorvision Spyder 2 Express. The monitor in question is a laptop
>>>> screen,
>>>> specifically it is a "Dell 15.4 WSXGA+ with TrueLife".
>>>>
>>>> Basically, my attempts have been pretty unsuccessful. Every
>>>> calibration I do
>>>> ends up having lots of magenta, such that blacks and greys on the
>>>> screen
>>>> have a distinctive colour cast. I presume this is not correct -
>>>> it certainly
>>>> doesn't make photos look very good!
>>>>
>>>> I have read about "dynamic contrast" monitors, and apparently
>>>> they aren't
>>>> any good for profiling unless you can turn it off. I can't really
>>>> find any very
>>>> technical details about the screen, and have no idea whether it
>>>> has "dynamic
>>>> contrast" or not. Also, there are no hardware controls for the
>>>> screen, so I
>>>> can't really adjust it at all before doing the calibration. Could
>>>> this be the
>>>> problem?
>>>>
>>>> Alternatively, I know my colorimeter is a pretty cheap model, so
>>>> perhaps it is
>>>> just not working very well?
>>>>
>>>> Any thoughts would be appreciated.
>>>>
>>>> Many thanks,
>>>> Jon Leighton
>>>>
>>>
>>>
>>>
>>>
>>
>
>
>
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