Datacolor User to User Support Group.

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
>