Datacolor User to User Support Group.

Thanks!  That does help a little with clarifying your intent (perceptual or otherwise) as well as what you were saying.  J

 

For the record, I think that Vista’s color management system when it is not used with their WCS but with the traditional ICC profile color management system via the printer driver’s ICM setting does not allow for the user selection of rendering intent as does Photoshop, although it will take such intents into account if they are included in the device profile being used  or embedded in the image file sent to it if that device profile is associated with the printer at the OS level and is defined as the default profile for that printer.  In short when used in the traditional ICM manner (not in the WCS manner), the Vista color management qworks the same as OS color management in XP.

 

From: colorvision_group@yahoogroups.com [mailto:colorvision_group@yahoogroups.com] On Behalf Of CDTobie@...
Sent: Thursday, August 14, 2008 11:54 AM
To: colorvision_group@yahoogroups.com
Subject: Re: [colorvision_group] High quality target for CD/DVD printing

 


In a message dated 8/14/08 12:40:52 PM, laurie@... writes:




>The default intent (which is seldom actually perceptual) is often put in the perceptual slot, and used for all conversions if the >conversion is an XYZ based conversion, instead of a Lab based one, in other words for source profiles, instead of printer >profiles.
 
Not be argumentative, but I am not sure that I get your suggested meaning here.  What do you mean by its not being “actually perceptual?”  What is “actual perceptual” and is there a commonly accepted standard for defining that?


Perceptual is typically defined as being mapped or compresses in such a way as to create a pleasing, not literal, result. The data typically put in an XYZ profile's Perceptual slot does not meet that definition. Its put there, not because its perceptual, but because thats the slot where data is typically retrieved from. I note all of this simply to point out that the information commonly included in color management sections of end user guides and books tends to have a simple description of intents and conversions, and users tend to be unaware that this really only has to do with printing, and that there are other places where profiles (and potentially intents) can be selected, where these descriptions do not really hold true. The WCS control panel may well be such a place... I really can't say.

C. David Tobie
WW Product Technology Manager
Digital Imaging & Home Theater
Datacolor
CDTobie@...
www.datacolor.com/Spyder3


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