[argyllcms] Re: Android - color management

  • From: János, Tóth F. <janos666@xxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 18 Jul 2012 19:32:45 +0200

Oh, I just realized ExTweaks (used with a compatible modified kernel)
offers some screen calibration options, like Red and Blue Gain (which
actually works).

2012/7/18 János, Tóth F. <janos666@xxxxxxxxxx>

> Thanks for the video.
> But this is exactly what I did and colors doesn't seem to be right. First
> of all, FF doesn't seem to correct the white point. And the colors still
> look over-saturated.
> If I use the ProPhoto profile then the difference is obvious. But I can
> not really tell the difference if my profile is active or not (I tried to
> replace the custom icm with a renamed sRGB profile and restart the browser).
> I guess I should try to measure some points (rendered by the browser) to
> make sure.
> By the way... What type of profiles should it accept as display profile?
> I guess XYZ LUT is out of the scope, but what about the shaper+matrix
> type? Should I create an even more simple gamma+matrix profile?
> I tried to use the ProPhoto.icm and that one obviously makes a huge
> difference.
> 2012/7/18 Becker Béla <beckerbela@xxxxxxxxx>
>> I wish to apologize to the board for the non-English message I sent this
>> morning, I meant to send this message privately to J. Tóth!
>> As an update, Firefox on Android still has color management, albeit it
>> probably uses QCMS. The browser has improved a lot in the past year,
>> especially in performance, it is now comparable to the stock browser.
>> On Wed, Jul 18, 2012 at 10:18 AM, Becker Béla <beckerbela@xxxxxxxxx>wrote:
>>> Kedves János!
>>> Elvileg ha követi az eredeti levelemben leírt lépéseket, a Firefox
>>> kezelni fogja a megadott profilt. Arra ügyelni kell, hogy az Android a Unix
>>> hagyatékának köszönhetően külön kezeli a fájlrendszerében a kis- és
>>> nagybetűket.
>>> Csináltam egy felvételt a műveletről, hátha segít. ProPhoto profilt
>>> használtam, ezáltal kilépés után elég egyértelmű, hogy dolgozik a színeken
>>> a Firefox. Ezen a címen elérhető:
>>> https://dl.dropbox.com/u/15617781/video.mp4<https://dl.dropbox.com/u/15617781/video.mp4>
>>> Viszont ha spektrométerrel készítette a képernyő profilját, azt én is el
>>> szeretném kérni. Nekem is Galaxy S2-m van, és szerintem a megjelenítők
>>> közti gyártási eltérésnek kisebbnek kell lennie mint a CCFL-hez szokott
>>> koloriméterrel történő mérés hibájának, és nekem csak egy Spyder3-am van.
>>> Nekem is jó szokásom, hogy már első napon a gyáritól eltérő ROM-okat
>>> teszek a mobilkészülékeimre. Én a CyanogenMod 9-nél ragadtam le. Külön
>>> élvezet követni a fejlődést a forráskódjában.
>>>  Üdvözlettel:
>>> Becker Béla
>>> On Wed, Jul 18, 2012 at 4:44 AM, János, Tóth F. <janos666@xxxxxxxxxx>wrote:
>>>> Could you please explain how did you set up the Firefox browser under
>>>> the Android OS?
>>>> I created an ICM profile (shaper+matrix with ArgyllCMS) for the
>>>> oversaturated (>AdobeRGB) OLED screen of a Galaxy SII (rooted custom
>>>> firmware) but I have no idea how I should give Firefox the location of this
>>>> file.
>>>> Imputing /sdcard/outfile.icm or /mnt/sdcard/outfile.icm or simply
>>>> outfile.icm didn't win (I set the browser to always apply the profile for
>>>> every rendered graphichs with Absolute colorimetry, so it should be obvious
>>>> when it works).
>>>> I am not really familiar with Android. Actually I just unpacked this
>>>> (my first Android based) phone today (and I spent most of this day by
>>>> installing custom firmwares and of course, profiling the display :D), so I
>>>> am not sure how Firefox sees the file system and what it expects to be
>>>> entered for the Gfx.color management.display.profile parameter.
>>>> 2011/7/26 Becker Béla <beckerbela@xxxxxxxxx>
>>>>> This may be a bit late, but I think it's still relevant.
>>>>> You can get color management to work in android inside the Firefox
>>>>> mobile browser. Go to the about:config page (type about:config in the
>>>>> address bar) and filter for gfx. Then, enable color management, set a path
>>>>> to your .icm profile. gfx.color_management.rendering_intent 0 is
>>>>> perceptual, 1 is relative colorimetric, 2 is saturation, 3 is absolute.
>>>>> I do not know of a way to calibrate the android screen because of a
>>>>> lack of a cLUT loading interface, but you can profile the screen by using 
>>>>> a
>>>>> vnc screen sharing app like TeamViewer.

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