Datacolor User to User Support Group.

--- In colorvision_group@yahoogroups.com, CDTobie@... wrote:

> >>2) When looking at profiles in Colorthink, those made with GMB
> Profilemaker (with Atkinson 1728 patch target) show:
> 
> 16 bit table, 33 grid points
> 16 bit table, 33 grid points
> 
> while those produced by Canon for the IPF5000 show:
> 
> 8 bit table, 9 grid points
> 8 bit table, 33 grid points
> 
> No direct relation to bit depth, a coarser grid on the return side
> of the profile (used only for previewing, not printing in most 
> circumstances) is just a space saver... the grid is how many 
> measurements there are, the bit depth is how many digits in each 
> measurement, so you would ideally want more in both... within 
> reason.

Thanks, that answers most of my questions.  Only have two more:

1) I take it that the "coarser grid on the return side" would be used 
for softproofing?  Or does it have some other use?  If so, seems that 
the softproof would be less accurate with the coarser grid.  

2) Would the "coarser grid" cause the profile gamut to display 
incorrectly in Colorthink, or is that unrelated?

3) How do you get 33 grid points out of 1728 patches?  Or are most of 
the grid points interpolated from the actual measured patches on the 
target?

--John