Datacolor User to User Support Group.

Hi David,

Pls excuse my ignorance but what's a "3/4 tone"?

Thanks,

Bob Schoner

-----Original Message-----
From: datacolor_group@yahoogroups.com
[mailto:datacolor_group@yahoogroups.com] On Behalf Of C D Tobie
Sent: Friday, October 30, 2009 9:00 AM
To: datacolor_group@yahoogroups.com
Subject: Re: [datacolor_group] Spyder3Print 4.0.1 Shadow Detail Control does
not work [1 Attachment]


On Oct 30, 2009, at 11:32 AM, prof_mgt551 wrote:

> I increase the Shadow Detail Control from 0 to a higher numbers: 5  
> and 12 and create new profiles. I then use these new profiles in  
> Photoshop to print a test target. Comparing the printout to the  
> first profile that used a Shadow Detail setting of zero, 5 gives  
> less shadow detail and 12 even less shadow detail in the printouts  
> on an Epson 7900 printer, the opposite of what is suppose to happen.  
> Spyder3Print is installed on a Windows Vista machine.
>
> Any suggestions? I will try setting the control to a negative  
> setting and see what this does?

The shadow detail control makes a localized lightening of the dark  
tones. This will, if used in moderation, bring tones lost in the  
depths back to where they can be seen. If used to excess, it could  
cause a reversal at the 3/4 tones that would reduce shadow detail. And  
if your idea of shadow detail is different than lightening very dark  
areas, than you may not get the effect you expect from this tool. But  
the positive direction will lighten near blacks. This may actually, in  
the process, reduce the distinction of other tones nearer the 3/4 mark  
(there is no free lunch, if you increase distinction in one place, it  
has to be reduced somewhere else). If you wish to avoid a backup at  
the 3/4 tones, use a global adjustment to the brightness control, or a  
Photoshop curve of your own making instead of the shadow detail control.

C. David Tobie
Global Product Technology Manager
Digital Imaging & Home Theater
CDTobie@...



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