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Re: [datacolor_group] Profiles and Prints--A question

2010-11-14 by C D Tobie

>>Eventually I realized that the Spyder proof had no tag the individual photos
were tagged Adobe RGB and the collage was tagged sRGB.  Using PhotoShop to
tag the Spyder Proof with Adobe RGB and changing Photo Fusion to "Pass thru"
the individual image tags resulted in good looking prints.

>>So my question is: What's happening? Why doesn't the sRGB image print
correctly? Did Photo Fusion's conversion to sRGB mess things up? What does
the printer/profile do when the image is untagged as is the case with Spyder
Print images?

The individual SpyderProof images are buried for a reason; they are untagged, for internal application use, not for end user use. There is a tagged copy of the whole Matrix in a more public location... tagged AdobeRGB. Apparently your app assumes sRGB for untagged images. The fact that your individual images are AdobeRGB, but the composite is sRGB may mean that it has been incorrectly tagged. Not knowing this particular app, I can't say much about how it handles, or mishandles, color. And there is the possibility of user error as well...

I should warn you that making changes to the internal files which SpyderProof uses (including applying profile tags to them) may cause your copy of SpyderProof to fail to function properly.   

C. David Tobie
Global Product Technology Manager
Digital Imaging and Home Theater
Datacolor inc. 
cdtobie@...
www.datacolor.com

On Nov 13, 2010, at 7:40 PM, "Bob and Carol Schoner" <rschoner@...> wrote:

> Eventually I realized that the Spyder proof had no tag the individual photos
> were tagged Adobe RGB and the collage was tagged sRGB.  Using PhotoShop to
> tag the Spyder Proof with Adobe RGB and changing Photo Fusion to "Pass thru"
> the individual image tags resulted in good looking prints.
> 
> So my question is: What's happening? Why doesn't the sRGB image print
> correctly? Did Photo Fusion's conversion to sRGB mess things up? What does
> the printer/profile do when the image is untagged as is the case with Spyder
> Print images?

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