Re: EyeOne Monitor Profile
Re: EyeOne Monitor Profile
- Subject: Re: EyeOne Monitor Profile
- From: Roger Breton <email@hidden>
- Date: Fri, 18 May 2001 20:57:23 -0400
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Subject: Re: EyeOne Monitor Profile
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> We were hoping for a slightly more detailed statement; like what it does
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> with
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> them, or whether there is any actual advantage to them in Photoshop, above
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> curve-only profiles.
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I think there can be advantages to them, but since they are more complex,
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care must be taken to ensure they remain well behaved especially in terms
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of gray balance. A LUT based profile can break the concept of R=G=B
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creating a neutral gray. If you create a neutral gray background of
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128,128,128 and then go to Assign Profile, and specify an RGB device
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profile (it's a LUT based profile), you will see a serious color shift
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that is definitely not neutral - if you change the info palette to read
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in Lab values, you'll see that it's definitely not a neutral color.
Please correct me if I am wrong but aren't Monitor Profile only destined to
act as a "bridge" between whathever abstract RGB working space one choose to
use in Photoshop and the physical hardware of the monitor? Then, the concept
of R=G=B creating a neutral gray still holds *IN THE WORKING SPACE*. It's
just at the time of sending that R=G=B data to the monitor for physical
display that the Monitor Profile, whether LUT or Matrix-based, is called
upon and becomes a factor in color appearance management. Then, isn't it OK
if R is not G is not B, as long as whathever mix of RGB that gets send to
the monitor yields the best neutral on our colorimeter?
--
Roger Breton
Quibec Institute of Graphic Communications
Montrial (Quibec) Canada T. (514) 389-5061 F. (514) 389-5840
email@hidden