Datacolor User to User Support Group.

Just bumping this up to see if someone can answer this.


--- In colorvision_group@yahoogroups.com, "Keith R." <kjrslr@...> 
wrote:
>
> David,
> Thank you for this "tutorial". All the while I was reading it, the 
> radio in the back ground was playing  "...put the lime in the 
coconut 
> and shake it all up...
> So let me get this straight, you put the lime in... No, I mean you 
> measure the color target, step back and then measure the extended 
> grey target, then go forward and build you profile from the two 
> targets to create one profile. Is this new profile then used for 
only 
> greyscale images, or is it also used for color also? 
> 
> 
> --- In colorvision_group@yahoogroups.com, David Miller <dm2363@> 
> wrote:
> > Here's something I've written up that you can use as a supplement 
to
> > what's in the Help files:
> > 
> > 
> > First, print one of the color targets (either 225 or 729 patches; 
> I'd suggest
> > starting with 225, to keep things simple, then try again with 729 
> later if you
> > like).
> > 
> > Then print the Extended Grays target. If you do the 225 colors 
and 
> the 238
> > extended grays, you'll have two sheets of letter size targets 
ready 
> to measure.
> > 
> > It's extremely important that you print both of these on the same 
> paper, using
> > the same driver settings.
> > 
> > Then, on the Read Patches screen, measure each one of them. 
Before 
> you step
> > forward into that screen, you need to set "which" kind of target 
> you're going
> > to be measuring on the Select Target screen. So: Select Target: 
> 225; click
> > Next; Save Measurements To...; then Read Patches. Step back to 
> Select Target:
> > Extended Grays; click Next; Save Measurements To...; Read Patches 
> again. Now
> > you have measurements saved for colors, and for grays.
> > 
> > Visually check them, too, for accuracy. Open up the Target window 
> for each,
> > switch to Measured mode so you can see only the measured colors, 
> drag on the
> > lower right corner to make the window even larger, then visually 
> compare to
> > your target print. You should see a reasonably close match. Look 
> for "bad"
> > measurements, which (if they exist) will typically be too-light 
> patches that
> > stand out among their neighbors in the darker regions; they 
should 
> be easy
> > to spot. Remeasure any bad ones (arrow keys to locate the patch, 
> then measure
> > again).
> > 
> > Now that you've got these, you can Build.
> > 
> > The Extended Grays are used as a supplement to the colors; but 
you 
> don't build
> > a profile straight from them; that why if you select them in the 
> measurement
> > list, you can't step forward to the Build screen. (We have to let 
> them show
> > UP in that popup, though, because you need a way to measure and 
> preview and
> > possibly remeasure them).
> > 
> > Instead, this is what you do:
> > 
> > - Select your COLOR measurements in the main popup on the Read 
> Patches screen.
> > 
> > - Once you do this, another checkbox and popup (smaller) will 
show 
> up below
> > that, and your Extended Grays measurements will be in THAT popup. 
> (All
> > Extended Grays measurements that are in your Data:PRO folder will 
> show up in
> > this supplementary popup below the main popup). Use that smaller 
> popup to
> > select "which" extended grays measurements you want to use; and 
> then CHECK
> > the checkbox if you want them to actually be USED when you build 
> the profile.
> > (If the checkbox isn't checked, then when you build, only the 
color 
> measurements
> > will be used when you build the profile).
> > 
> > - To summarize: to build a profile with Extended Grays used as 
part 
> of the
> > profiling process:
> > 
> >   - Measure a color target and a grays target
> > 
> >   - Select the color target in the main popup
> > 
> >   - Select the extended grays target in the supplementary popup 
> that appears
> >     below it; and also CHECK the "Use extended grays" checkbox.
> > 
> > 
> > Best regards,
> > 
> > -- 
> > David Miller
> > Senior Software Developer, Digital Color Solutions
> > ColorVision
> >
>