Datacolor User to User Support Group.

Hi, Thanks for getting back. I printed the Spyder Proof image two ways, thru Spyder Print and thru my printing program (QImage); both gave the orange/reddish skin tones. When I printed it thru Spyder Print it brought up the Printer Dialog box (Epson R1800, PC). In the advanced frame I turned on ICM, clicked "Show all profiles" and loaded the Spyder Print profile that I created; it came out reddish. Maybe this was not correct if Spyder Print assigns the profile in some other way. The Spyder Proof image that I tagged Adobe RGB�was "Saved As" in a different folder; it printed correctly�using QImage. By savng it in a different folder I should not have messed up Spyder Print.

My question was more of a theoretical one. How do the printing programs handle an untagged image; do they assume sRGB? And, what happens to the colors when an AdobeRGB tagged image is converted to sRGB?

�;

Bob Schoner

-----Original Message-----
From: C D Tobie
Sent: Nov 13, 2010 6:49 PM
To: "datacolor_group@yahoogroups.com"
Subject: Re: [datacolor_group] Profiles and Prints--A question

>>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?