Datacolor User to User Support Group.

On Nov 10, 2008, at 10:29 AM, John Arnold wrote:

> --- In colorvision_group@yahoogroups.com, Cdtobie <CDTobie@...> wrote:
> >
> > There is no "typical"; each company uses their own methods. But yes,
> > you can get results where out of gamut colors are brought into gamut
> > with equal priority to hue, saturation, and brightness by choosing
> > Relative Colorimetric.
> >
>
> What I understood after reading Real World Color Management is that  
> Relative maps white
> in the source to white in the destination and that it reproduces all  
> in-gamut colors exactly
> while clipping out-of-gamut colors to the closest reproducible hue.  
> Jeff Schewe indicates
> that it preserves the overall tonal relationships better than most  
> other options. So I guess I
> am asking if that is also characteristic of you Relative rendering  
> intent.
>
>

That's a good generalized description. Yes, with the Relative intent,  
in-gamut colors
map as exactly as possible and out-of-gamut colors are mapped to the  
closest reproducible
hue.
> I understood in an earlier reply from David Miller that your  
> Saturation intent responds
> differently than most others as it has been optimized for  
> photography. I think that's great.
>

The Saturation and Perceptual intents in our profiles also map in- 
gamut colors as exactly
as possible. So with our profiles, the real difference in printed data  
through the
3 intents is what happens with out-of-gamut colors, the in-gamuts will  
always print the
same (as exactly as possible)
>
> I have ordered Spyder 3 Print, so I am just trying to understand a  
> little bit about what's
> going on with the Relative setting as an option, even though I know  
> you recommend
> saturation.
>
>

It comes down to getting more color mixing/blending in out-of-gamut  
colors so that the
hues are "correct". (Our Perceptual intent also has out-of-gamut  
mapping, but less adjustment
of out-of-gamut colors than Relative).

Having printed a wide variety of images on a number of different  
printers and papers through
S3P-generated profiles, I always print through the Saturation intent.


David Miller
Senior Software Developer, Digital Color Solutions
Datacolor