Where is monitor hardware calibration stored?
Hi - We current use Windows XP with no hope of changing anytime soon. This makes color managing our monitors difficult because XP requires admin privledges to write a profile and to apply a profile. (These are two separate actions.) Our security policies do not allow users adlmin rights making color management very difficult. But many of our QA workstations have Eizo or LaCie monitors which allow monitor calibration via the monitor internal LUT rather than the video card LUT. I wonder if either monitor stores current calibration data internally? Apparently the LaCie monitor does because after admin calibration I find no file in the profile directory yet our tests show the monitor is deplaying colors correctly. The Eizo software stores a very small .icm file in the C:\WINDOWS\system32\spool\drivers\color directory, but it doesn't appear to contain full LUT data. So my questions for only Eizo and LaCie monitors calibrated using Eico and LaCie programs and spectros are: Is calibration data stored in the monitor internally? If so, is this sufficient? What advantage is gained through an .icc profile? Thanks, Barry F. Barry Wheeler, Digital Projects Coordinator, Office of Strategic Initiatives, The Library of Congress Washington, DC 20540 bwhe@loc.gov 202 707 8581
Hi Barry, Your situation sounds familiar. I teach in a similar, tight university security setting, also running XP but slowly migrating to Win7, with no hope, neither, of ever switching to non-MS platform. It does not bother me but, as you noted, it makes color managing monitors impossible. You're right, the hardware calibration sits inside the monitor's own memory, But that's only half of the equation because poor Photoshop needs to know what kind monitor space conversion it needs to do in order to display color accurately. So, if no corresponding ICC profiles are available for describe the monitor color rendering capabilities, all bets are off. Yes, as far as maintaining calibration is concerned, the Eizos and some of the LaCies will, to my knowledge, obey that law. So that, if they are moved from one computer to another, when brought back to life, their "color display" characteristics will not change. What will change, and you can't do much about it in your environment, is the system monitor profile that's associated with it. In other words, it needs to be "reconnected" with the new host computer if color-aware applications are to make sense of its capabilities. I'd be curious how NEC MultiProfiler lives in an XP environment? I think, it also needs to have admin rights in order to update its own profile? I know it does under Win7. Best / Roger -----Original Message----- From: colorsync-users-bounces+graxx=videotron.ca@lists.apple.com [mailto:colorsync-users-bounces+graxx=videotron.ca@lists.apple.com] On Behalf Of Wheeler, Barry Sent: October-06-11 2:56 PM To: 'colorsync-users@lists.apple.com' Subject: Where is monitor hardware calibration stored? Hi - We current use Windows XP with no hope of changing anytime soon. This makes color managing our monitors difficult because XP requires admin privledges to write a profile and to apply a profile. (These are two separate actions.) Our security policies do not allow users adlmin rights making color management very difficult. But many of our QA workstations have Eizo or LaCie monitors which allow monitor calibration via the monitor internal LUT rather than the video card LUT. I wonder if either monitor stores current calibration data internally? Apparently the LaCie monitor does because after admin calibration I find no file in the profile directory yet our tests show the monitor is deplaying colors correctly. The Eizo software stores a very small .icm file in the C:\WINDOWS\system32\spool\drivers\color directory, but it doesn't appear to contain full LUT data. So my questions for only Eizo and LaCie monitors calibrated using Eico and LaCie programs and spectros are: Is calibration data stored in the monitor internally? If so, is this sufficient? What advantage is gained through an .icc profile? Thanks, Barry F. Barry Wheeler, Digital Projects Coordinator, Office of Strategic Initiatives, The Library of Congress Washington, DC 20540 bwhe@loc.gov 202 707 8581 _______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/colorsync-users/graxx%40videotron.ca This email sent to graxx@videotron.ca
participants (2)
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Roger Breton
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Wheeler, Barry