[Openicc] ICC meta Tag for Monitor Profiles

Chris Murphy lists at colorremedies.com
Thu Dec 2 06:35:29 PST 2010

Is it true that a manufacturer serial number in the display is considered a less reliable means of identifying a display than md5? I guess statistically there is a greater likelihood two displays of different manufacture end up with the same serial number?

If the user changes the display behavior using On-Screen Menu from say Native RGB to sRGB, does this (and should it) clearly some means of notification of this is needed, and then also what the new primaries are (or the mode if all primaries are included in the original EDID info). Again, in that case md5 may be more useful if display state changes would cause a change in md5.

I'm thinking of simple cases like a web browser, and a user flipping between display states using the OSM. Any professional doing this for such displays is using software that rebuilds and sets the display profile with the system, so I'm less concerned about that case.

Chris Murphy

On Dec 1, 2010, at 3:03 AM, Richard Hughes wrote:

> On 1 December 2010 09:32, Kai-Uwe Behrmann <ku.b at gmx.de> wrote:
>> ==Definition==
>> The following key/value pairs are defined
>> * (key: value)
>> * EDID_mnft:         decoded three byte string from EDID address 8-9
> No "EDID_md5"?
> That's the one I really want to use in GCM. Matching a single hash is
> much easier that parsing and comparing all those string values.
> Richard.
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