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Color Profiling Not Working...

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Adam

19 May, 2013 05:30 AM

Dear TFF:

I have been noticing, of late, an issue that has apparently also been hitting the mainstream Firefox boards that deals with broken color management on Mac systems since the standard gamma was changed to 2.2. I have attached an image (hope this isn't too racy for everyone there - but it is a very good example of the problem).

Left: On the left is how Tenfourfox renders the image with color-management enabled.
Middle: How it renders the scene with color-management off.
Right: How Safari renders it (perfect - identical to Preview and Photoshop).

This article ( https://bugzilla.mozilla.org/show_bug.cgi?id=514932 )discusses the problem and recommends setting the path to the display profile, and while this does help, it is still much too bright in the gamma (could this be assuming the use of a 2.2?) My monitor is a wide gamut monitor that looks like crap at 2.2 - I have to use 1.8. Is there a fix for this without disabling color management?

My system is: G4 MDD Dual 1.42 with OSX 10.4.11. Tenfourfox 17.06

P.S. The example image can be checked at: http://www.modelmayhem.com/portfolio/882931/viewall#/11818521

• TFF-CM-Broken.jpg 191 KB

1. 1 Posted by Adam on 19 May, 2013 05:45 AM

   

   P.S. Just checked on two other G4s running TFF and got the same result. One of the profiles is only about two weeks old.

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2. Support Staff 2 Posted by Cameron Kaiser on 19 May, 2013 06:31 AM

   

   I can confirm the display difference, and yes, gamma is the likely culprit since all supported Firefox systems use 2.2, not "classic Mac" gamma 1.8. However, it should be able to get this from the display settings.

   If you make a new preference gfx.color_management.force_srgb and set it to true (you may need to restart the browser), does this change the image?

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3. Support Staff 3 Posted by Cameron Kaiser on 19 May, 2013 06:32 AM

   

   (And yes, we should probably note for the record that the image may be NSFW.)

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4. 4 Posted by Adam Albrec on 19 May, 2013 06:55 AM

   

   Sorry no change.

   Also, very sorry if the pic was not OK to post. I just only was running into this with images that had profiles (about 1 in 20) and this was a good example of the problem. Feel free to delete the thread if you need to.

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5. 5 Posted by Adam Albrec on 19 May, 2013 07:22 AM

   

   One last thing. On a whim, was testing linking to a few other profiles to see if one made a change, and I noticed the sRGB was greyed-out and would not allow me to link to it. Could it be that since the browser assumes 2.2, that it disallows conversion to sRGB? Just speculating.

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6. Support Staff 6 Posted by Cameron Kaiser on 19 May, 2013 06:51 PM

   

   Actually, I suspect that the browser is already treating the image as sRGB. That's its default behaviour if the system profile is somehow not accessible (it falls back on a generic sRGB profile).

   This problem is now being tracked as issue 225: http://code.google.com/p/tenfourfox/issues/detail?id=225

   ETA will probably be 17.0.8, not 17.0.7; because this could wreck colours for 10.5, I'd like at least one test cycle on unstable.

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7. Cameron Kaiser closed this discussion on 19 May, 2013 06:51 PM.