[argyllcms] Re: Display Calibration Hardware Capabilities

  • From: Rishi Sanyal <rishi.j.sanyal@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 11 May 2011 18:33:41 -0700

Funny, Vittorio -- I'm 'sarangiman' on that thread.

Anyway, I offered Ethan my Munki next time I headed down to Portland.
No response re: that.

Anyone in Seattle with a ColorMunki or i1 Pro? I'm not convinced the
Munki is that bad b/c it generates reasonable profiles across my Dell
U2711 as well as my older Dell 2005FPW. Couldn't say the same for my
i1 Display 2, which just failed miserably on my U2711.

But I have no way of knowing how accurate my Munki actually is...
-Rishi

On Tue, May 3, 2011 at 3:52 PM, adam k <aak1946@xxxxxxxxx> wrote:
> I think the guy who test CM should test another one. The one he has is
> definitely bad one.
>
> Sent from iPhone
>
> On Apr 29, 2011, at 10:21 PM, Rishi Sanyal <rishi.j.sanyal@xxxxxxxxx> wrote:
>
>> I'm not so sure I believe the ColorMunki is that bad. Ethan doesn't
>> talk about using longer integration times via ArgyllCMS/dispcalGUI
>> with the ColorMunki. I have done this, & get much more accurate
>> shadows with my ColorMunki. Prior to using longer integration times,
>> my ColorMunki was *horrible*. Its profile brightened all shadows
>> (didn't map input 0 to output 0 like my colorimeter did). You *have*
>> to use the longer integration times with the ColorMunki. Perhaps this
>> is the reason his CM performed poorly.
>>
>> Another reason his CM may have performed poorly could be because
>> ColorMunki software is just silly. It only measures primaries. I
>> didn't find its profile to be at all accurate. Which is why I switched
>> to using dispcalGUI. I'm happy with my profiles now, but I haven't
>> objectively tested how accurate the colors are (how do you do that
>> anyway? I don't believe you can use one hardware device to test
>> itself...).
>>
>> I will email Ethan & ask him if he could redo the test with CM +
>> dispcalGUI (using longer integration times).
>>
>> Also, Ethan talks about the user-unfriendliness of command-line
>> ArgyllCMS, but doesn't mention the very user-friendly (IMHO)
>> dispcalGUI.
>>
>> FYI wide-gamut displays are very problematic. My Dell U2711 just
>> couldn't be profiled with my i1 Display 2. because it just estimated
>> the red primary (& perhaps the others too, but not as obviously)
>> completely wrong. The resulting profile completely hue-shifted &
>> desaturated my reds such that I just couldn't see red on my monitor. I
>> could literally make a color patch in Adobe Photoshop of 255,0,0 &
>> it'd look like a desaturated orange. The ColorMunki profile fixes
>> this.
>>
>> Interestingly enough, when I used the CM to make a new correction
>> matrix for my i1 Display 2 (you can do this using ArgylllCMS, which
>> shows a bunch of colors to both your colorimeter & your CM or any
>> other spectrophotometer, separately of course, & creates a 3x3
>> correction matrix that helps the colorimeter more accurately assess
>> that monitor's primaries), my i1 Display 2 behaved quite well. Reds
>> came back. The profile looks pretty similar to the CM profile, not
>> surprisingly.
>>
>> Best,
>> Rishi
>>
>> On Fri, Apr 29, 2011 at 7:02 PM, adam k <aak1946@xxxxxxxxx> wrote:
>>> I'm sorry to find out about CM now after I bought it. How can I test it?
>>>
>>> Sent from iPhone
>>>
>>> On Apr 29, 2011, at 9:58 PM, edmund ronald <edmundronald@xxxxxxxxx> wrote:
>>>
>>>> I wonder whether the bad showing of ColorMunki on blacks is a one-unit 
>>>> failure?
>>>> The Spyder guys seem to have reinvested the cashflow from their
>>>> mediocre products into making perfectly acceptable products.
>>>>
>>>> Edmund
>>>>
>>>> On Sat, Apr 30, 2011 at 3:07 AM, Iliah Borg <ib@xxxxxxxxxxx> wrote:
>>>>> An updated review of the hardwares is published today by Ethan Hansen 
>>>>> here:
>>>>> http://www.drycreekphoto.com/Learn/Calibration/MonitorCalibrationHardware.html
>>>>>
>>>>> It contains some interesting references to Argyll CMS too.
>>>>> Ethan suggested some additional explanations here
>>>>> http://www.luminous-landscape.com/forum/index.php?topic=53825.0
>>>>>
>>>>> --
>>>>> Iliah Borg
>>>>> ib@xxxxxxxxxxx
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>
>
>

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