Datacolor User to User Support Group.

Hi, CD,

One of my colleagues on several camera forums (a "recognized expert" in color management) vehemently believes that it is most attractive to apply no calibration to the monitor chain but rather to allow the ICC profile to do all the mediation to the monitor's native color space. (I guess what this means is that we should leave the CLUT's in the video board all with straight lines.) He is evidently only concerned with display performance under profile-aware applications.

I don't myself subscribe to this position, but often I have to help my colleagues do various things with various tools.

I have suspected that OptiCAL (which I used with a Spyder "1") would do this for us if we started the process by selecting "Profile..." (rather than "Calibrate&Profile" from the File menu. Is that so? (This might just result in a profile with no vcgt tag - I haven't had time to try that yet.)

Then, will Spyder 3 Elite allow us to do the same thing?

If not (and in any case, of interest to Spyder 3 Pro users, like myself at the moment), is there a target definition (*tgt file) that will produce this result? I note, for example, that there are targets supplied that leave the native white point in place (but leave the calibrated display with a certain target gamma curve, not the native one).

Thanks so much.

Best regards,

Doug

On May 22, 2009, at 1:43 PM, Doug Kerr wrote:

> One of my colleagues on several camera forums (a "recognized expert"  
> in color management) vehemently believes that it is most attractive  
> to apply no calibration to the monitor chain but rather to allow the  
> ICC profile to do all the mediation to the monitor's native color  
> space. (I guess what this means is that we should leave the CLUT's  
> in the video board all with straight lines.) He is evidently only  
> concerned with display performance under profile-aware applications.

I won't name names, since you didn't; but one "recognized expert" has  
been promoting this rather fringy idea for years... <G>
>
> I don't myself subscribe to this position, but often I have to help  
> my colleagues do various things with various tools.
>
> I have suspected that OptiCAL (which I used with a Spyder "1") would  
> do this for us if we started the process by selecting  
> "Profile..." (rather than "Calibrate&Profile" from the File menu. Is  
> that so? (This might just result in a profile with no vcgt tag - I  
> haven't had time to try that yet.)
>
> Then, will Spyder 3 Elite allow us to do the same thing?

Spyder3Elite has an Expert Console (designed for "recognized experts"  
<G>) which allows you to profile without calibration, thus producing  
the desired (but not necessarily desirable) results you describe; I  
actually had him in mind when I designed that feature...
>
> If not (and in any case, of interest to Spyder 3 Pro users, like  
> myself at the moment), is there a target definition (*tgt file) that  
> will produce this result? I note, for example, that there are  
> targets supplied that leave the native white point in place (but  
> leave the calibrated display with a certain target gamma curve, not  
> the native one).

Its not available in Pro, as its an Expert Console-only function.

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

Hi, David [is that appropriate?],

--- In colorvision_group@yahoogroups.com, C D Tobie <CDTobie@...> wrote:
>
> 
> On May 22, 2009, at 1:43 PM, Doug Kerr wrote:
> 
> > One of my colleagues on several camera forums (a "recognized expert"  
> > in color management) vehemently believes that it is most attractive  
> > to apply no calibration to the monitor chain but rather to allow the  
> > ICC profile to do all the mediation to the monitor's native color  
> > space. 
> 
> I won't name names, since you didn't; but one "recognized expert" has  
> been promoting this rather fringy idea for years... <G>
I'm sure you would recognize of whom I was speaking!

> Spyder3Elite has an Expert Console (designed for "recognized experts"  
> <G>) which allows you to profile without calibration, thus producing  
> the desired (but not necessarily desirable) results you describe; I  
> actually had him in mind when I designed that feature...

Well, how thoughtful.

Thanks for filling in the blanks here.

Best regards,

Doug