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Colours, colours, COLOURS!!

G4 PPC & Iiyama 454


Recently had my aged Mitsubishi 22" CRT screen die on me and been used a 17" CRT with no problems, but I've just bought a pristine Iiyama 454 and after changing non of the system settings, 1/4 of all the images I can see on this screen, have become dayglo - enormously over saturated. How it is this screen seemingly magically, managing to interpret colour profiles??? I've tried coloursync calibrating it, adjusting the monitors settings, but only changing an images assigned colour profile to the monitors brings the colours back to a semblance of normality.


Does anyone know of a way to make OS 10.4.11 or this screen ignore an images built in colour profile?


(I hope someone out there is still alive who may know the answer to this conundrum)


Thanks for reading this

Mac OS X (10.4.11)

Posted on Apr 27, 2012 6:31 PM

Reply
18 replies

Apr 27, 2012 7:17 PM in response to Hammer Tome

Color management is a bit (actually, a lot) more complicated than that. 😀


Assigning the monitor profile to an image file is like burying your head in the sand. It will look right to you, but you won't have a clue as to what the image looks like to others on their monitor.


Color Management starts with an accurately calibrated and profiled monitor. You need to calibrate and profile your monitors regularly and often—preferably with a hardware calibrator puck.


Then, honor the file's color profile and always embed the color profile in your image files. When you need an image file to be in a different color space, always use CONVERT to the target profile in your color managed graphics application, e./g. Photoshop. Do not use "assign" profile except in one case, as follows:


The only time you have to resort to "assigning" a profile is when some moron hands you an untagged image file (i.e,, a file without an embedded color profile). In that unfortunate case you do have to make an educated guess as to what color space the file was created in by successively assigning different color profiles and choosing the one that makes it looks best. Afterwards you go slap the moron who gave you the untagged file upside the head and admonish him never to do that to you ever again.


If you follow these guidelines, your images will display correctly in all color-managed applications.


This web site explains color management extensively and in layman's terms, and it's very Mac-oriented:

http://www.gballard.net/psd/cmstheory.html. Read the whole web site carefully and thoroughly. It's more than worth it.


Message was edited by: Ramón G Castañeda

Apr 27, 2012 7:20 PM in response to BDAqua

Cheers Ramón G Castañedaand BDAqua


but you'd really have to see this conundrum to believe it, I do however, now have a machine that can distinguish if a websites' thumbnails and full rez images where produced on the same machine/system


Like I said 1/4 of the internet has suddenly become populated by sRGB or LCD profiles, why is the profile for this screen so sensitive? - it is after-all a mini version of the 22" screen I had that died - I should also throw a 15" Sony screen that didn't exhibit these problems either

Apr 27, 2012 7:36 PM in response to Hammer Tome

Yikes! Not being familiar with that brand at all, I assumed the model you cited was a Wide Gamut monitor of recent vintage.


How do images look in Photoshop? Until the most recent OS versions, Apple applications, from the Finder through Safari and to Aperture, unfortunately throw the monitor's profile at untagged images, rather than assuming sRGB.

Apr 27, 2012 7:44 PM in response to Ramón G Castañeda

'Apple applications, from the Finder through Safari and to Aperture, unfortunately throw the monitor's profile at untagged images, rather than assuming sRGB.'


Aha! I have found a discrepancy with both RGC the finder has gone mad colour wise, as has sRGBs, only untagged images appear to work but why is the profile for this screen so picky? and why has it never been resolved?

Apr 30, 2012 10:01 AM in response to Ramón G Castañeda

Cheers for that link Ramón G Castañeda, strange that the sites' author didn't use the same colour profile for all the images on the page though? ie generic RGB on some and sRGB on others seemingly unrelated to the story?


Does anyone know what 'Whacked' means in terms of colour management? And does the Author of that site know 1/2 of his images appear bright orange and the red text on some of their images is virtually unreadable?


Just tried the site with the supposedly colour managed Firefox and absolutley no differences to the over saturation whatever the colour settings are set too


Does anyone know how to make OS 10.4 override an images inbuilt colour profile? Or universally apply the screens' to images and the system?

Colours, colours, COLOURS!!

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